Feasibility study report of iron fine powder selection project

Chapter 1 Project Overview

1.1. Project Overview

The county is located in the western part of Liaoning Province. It is located between 119 ^o 10' to 120 ^o 02' east longitude and 41 ^o 17' to 42 ^o 20' north latitude. The county is slightly rectangular, 75 km wide from east to west and 125 km long from north to south. The northwest, north, northeast and east are respectively bordered by Ningcheng County, Chifeng City, Kalaqin Banner and Shuhan Banner of Inner Mongolia; the southeast, south and west are adjacent to Chaoyang City, Kazuo County and Lingyuan City.

The mines that have been mined in the county are gold , iron , manganese , zinc , copper and aluminum . Nonmetal miners have perlite, dolomite, bentonite, limestone, clay, wollastonite, quartz, zeolites, marble, talc, raw coal. Its mineral characteristics are large reserves, good quality, shallow buried layer and easy mining. The industrial sector mainly includes fertilizers, chemicals, rubber, agricultural machinery, power generation, matches, and sugar, wood, clothing, food processing, beer and beverages.

The county is rich in mineral resources. Over the years, the development and utilization of mineral resources has greatly promoted the county's economic development, and mining development has become a pillar industry of the local economy. However, the distribution of resources is uneven, and most of the mineral resources are concentrated in the Linghe River Basin around the county. In order to rationally develop and utilize mineral resources and change the advantages of resources as economic advantages, it is necessary to grow the industrial chain and extend the industrial processing procedures in order to maximize the benefits of mining and promote the sustainable development of mineral resources.

Entrusted by the County Mining Co., Ltd., Xingnong Engineering Consulting Co., Ltd. prepared a feasibility study report for its iron fine powder selection project.

1.1.1 Project Name

County Mining Co., Ltd. iron fine powder selection project.

1.1.2 Project Background

The project is located in Liuji Village, Laoxidian Village, Wanshou Sub-district Office, Liaoning Province. The land use procedure is being applied for pre-trial, which is a temporary occupation of land.

County Wanshou Sub-district Office has a number of iron ore dressings , and produces more than 200,000 tons of iron concentrate annually. In order to maximize the benefits of mining, Wanshou Sub-district Office introduced the iron fine powder selection project of County Mining Co., Ltd. The project adopts the technology selected by Hebei Province iron fine powder, the technical process is advanced and mature, and it is widely used. It will produce less than 50% of iron fine powder and produce more than 70% of super iron fine powder through two magnetic separation and reverse flotation.

1.1.3 Project organizer

Project Undertaker: County Mining Co., Ltd.

1.1.4 Project legal representative

legal representative:

1.1.5 Nature of project construction

New Project.

1.1.6 Construction scale

Construction scale of the proposed project: The estimated total investment of the proposed project is 18 million yuan. The first phase of the project selected project investment of 8 million yuan, the second phase of the project flotation project investment of 10 million yuan. The first phase of the proposed project covers a total area of ​​30 mu. The total construction area is 6000m ² . Production scale of the proposed project: The annual working day is 300 days. Nissan iron fine powder is 300 tons, with an annual output of 105,400 tons of iron fine powder. Arrange more than 100 spare laborers.

1.2. Purpose of the project feasibility study

The purpose of preparing the feasibility study report is to make a financial analysis and comprehensive evaluation of the feasibility of the project implementation, and draw feasibility conclusions and project implementation recommendations for the reference of the board of directors and the competent authorities.

1.3. Research scope

This report mainly analyzes the feasibility of project investment, construction conditions, process equipment, investment estimation, economic benefits and other aspects.

The scope of research includes:

1. The background and necessity of the project construction;

2. Product market analysis;

3. Project construction scale and product plan;

4. Process technology plan and supply of raw and auxiliary materials;

5. Engineering construction plan;

6. Environmental protection and energy conservation;

7. Investment estimation and fund raising;

8. Financial analysis and evaluation.

1.4. Project design basis

(1) Law of the People's Republic of China on Soil and Water Conservation;

(2) The Environmental Protection Law of the People's Republic of China;

(3) Law of the People's Republic of China on Environmental Impact Assessment;

(4) Regulations on Environmental Protection Management of Construction Projects;

(5) "Noise Standard for Industrial Enterprises Boundary" (GB12348-90);

(6) "Integrated Emission Standards for Air Pollutants" (GB16927-1996);

(7) "Design Regulations for Environmental Protection of Machinery Industry" (JBJ16-88);

(8) "Code for Fire Protection of Building Design" (GBJ73-84);

(9) "Sanitary Standards for Industrial Enterprises Design" (TJ36-79);

(10) "Environmental Air Quality Standards" (GB3095-1996);

(11) "Integrated Wastewater Discharge Standard" (GB8978-1996);

(12) Code for Process Design of Nonferrous Metals Concentrators (YSJ014-1992);

(13) Design Specification for Tailings Facilities of Mineral Processing Plant (ZBJ1-90);

(14) County Mining Co., Ltd. “Application for the Project of Iron Fine Powder Selection Project of County Mining Co., Ltd.”;

(15) “Power of Attorney for Entrusting Xingnong Engineering Consulting Co., Ltd. to Prepare the Feasibility Study Report of the Iron Fine Powder Selection Project of County Mining Co., Ltd.”;

(16) Hydrological, meteorological, geological and other information provided by the relevant departments.

1.5. Market Analysis and Forecast

In 2007, the total output of crude steel in 67 major steel producing countries and regions was 1,343.5 million tons, an increase of 7.5% year-on-year. This is the fifth consecutive year that the growth rate is above 7%. Among them, China's output was 489 million tons, an increase of 15.7%, China is still the world's largest producer of crude steel; the second is Japan, 120 million tons; followed by the United States' 97.2 million tons; in addition, Russia, India, South Korea, Germany, Ukraine, Brazil and Italy.

China's crude steel output is not only the world's first, but the output exceeds the total of the second to eighth, accounting for 36.4% of the global total. In 2006, this ratio was 33.8%, in 2005 it was 31%, and in 2004 it was 26.2%. Increasing trend year by year. In response to the financial crisis, global crude steel production growth began to slow down, and the global growth rate of 7.5% was lower than 8.8% in 2006. Among them, China's growth rate of 15.7% was also lower than 18.8% in 2006 and 26.8 in 2005. %. In 2009, world steel consumption will increase by 7%, and the industry has said that China's steel consumption growth is mainly supported by domestic demand, especially the construction industry, rather than based on the substantial growth of steel exports, so the future of the global steel market is good. .

During the “Eleventh Five-Year Plan” period, China’s industrialization entered a period of rapid growth, which stimulated the growth of steel consumption. First, China’s overall strategy of regional coordinated development; maintaining the overall growth of steel consumption; second, promoting urbanization will bring The continuous expansion of steel consumption demand; third, fixed asset investment will continue to grow, requiring the growth of total steel consumption as a support; fourth, the income of 1.3 billion people will increase, and the consumption structure will be upgraded, which will become a new growth point for steel demand; Maintain steady growth in foreign trade imports and exports, and provide space for steel consumption growth.

China's regional economic development is unbalanced, and this unbalanced economic development will also bring about the difference in steel consumption. In the next five years, the proportion of China's steel consumption region will change: East China and Central South China are still the main regions of China's steel consumption. In 2010, the proportion of steel consumption still accounted for 57.5%; the proportion of steel consumption in Northeast and Southwest China showed a growth momentum, and steel consumption in 2010 The proportion will increase from 13.1% in 2005 to 16.3%, an increase of 3.2 percentage points.

The development of modern agriculture and the construction of new rural areas will become new growth points for steel demand. The constraint factor of this part of steel consumption is mainly whether the income of farmers is increased; the reduction factor is that the promotion of grade III steel bars will affect the dosage of 10%-15%. This part of the steel demand is multi-level, and there are big differences depending on the size of the region and the town. Steel companies should pay attention to changes in the structure of fixed assets investment. The downward adjustment of the proportion of the secondary industry in the national economy will mean the transformation of steel consumption growth from quantity to variety quality; the economic development of the Northeast region also contains new highlights of steel consumption increment. In recent years, China's national economy has developed rapidly. In the process of economic development, steel is an indispensable material. Automobiles and other manufacturing industries, industries, agriculture, construction and national defense construction all have large steel demand. The demand for iron fines, which are raw materials for steel production, has also increased year by year, and prices have also risen. Therefore, the market development prospects of the project are very broad.

1.6. Project necessity

The implementation of this project is conducive to enterprises to fully implement the scientific development concept, continuously improve the management level of enterprises, reduce production costs, and gradually establish and operate an environmental management system, which can provide employment for surplus personnel, maintain social security, stabilize social order, and ease Employment conflicts have great social significance. At the same time, it is also conducive to enterprises to increase the tax source for the local, and thus promote the healthy and stable development of the local social economy, and contribute to the construction of a harmonious society.

Chapter II Process Flow and Product Solution

2.1. Production methods

The project selects low-grade iron concentrates, and plans to use low-grade iron concentrate grinding, one-time magnetic rough selection, and two-stage magnetic selection production process.

2.2. Process

The process of selecting low-grade iron concentrates is as follows.

2.3. Equipment overview

Production equipment mainly includes: 18350 ball mill , 1#, 2#, belt conveyor equipment (B=650mm), 1 magnetic separator (900*1800), ceramic filter (T60/15-C60m2) 1 set, 1 120m2 filter press, 1 wheel loader (ZL50G), 2 excavators (PC750SE-7), 1 crawler dozer (DT140B), 2 dump trucks, power supply equipment 1 1 set of water supply equipment. Project equipment procurement investment of 4.53 million yuan (see attached table: domestic equipment purchase fee estimate).

2.4. Product plan

The basic principles identified in the product plan of this project:

1. Fully consider the conformity of national industrial policies and industry development plans;

2. Fully consider the market adaptability of the project products, and adopt advanced, applicable and forward-looking technologies to improve the competitiveness of the project;

3. Fully consider the reliability of project construction, estimate various engineering risks, and actively take effective measures to reduce risks;

4. Fully consider the feasibility of project construction, comprehensively analyze the comprehensive capabilities of the project itself, such as technical strength, management level, and fund raising;

5. Fully consider the advanced nature of the project product technology, increase the intensity of technological innovation, and improve the technical content of the product;

6. Fully consider the availability of raw materials used in the project, as well as the quantity, quality, and stability of the source;

7. Fully consider the environmental compatibility of the project products, and comprehensively manage the three waste materials to meet the standards and meet the requirements of environmental and sustainable development;

8. Fully consider the rationality of the project's income, and seek practical consideration of the project's functionality and profitability.

According to the above principles, after the capacity measurement, the product plan of this project is detailed in the following table.

Project product plan

Serial number	product name	Annual output (ten thousand tons)	Remarks
1	Super iron powder	12.54	Super iron powder grade is 70.5%

The raw material for the project is ordinary iron fine powder, and the unit price is calculated at 550 yuan/ton. The total cost of the super iron concentrate produced by the project is 840 yuan / ton. The product super iron fine powder is expected to be priced at 1,000 yuan / ton. The annual profit was 20.064 million yuan.

Chapter III Civil Engineering

3.1. General layout principle

The project master plan design considers the following aspects:

(1) Give full play to the effectiveness of land use, increase the building coefficient, save land, and properly handle the relationship between near-term construction and long-term development.

(2) To meet the requirements of applicability, rationality, economy and other requirements for production and use, to properly handle all aspects of the relationship, to add new construction, structures and other facilities according to the natural conditions, so that the layout of the buildings is orderly. And to meet the production function, and strive to make the overall layout is reasonable and compact.

(3) Arrange the transportation system within the factory according to local conditions, organize the flow of people and logistics, and ensure the diversion of people and vehicles. The road design should meet the fire protection requirements.

(4) Pay attention to the architectural art treatment of each building in the plant area and the coordination of its surrounding environment, and make the spacing between them meet the relevant specifications.

(5) Reasonably comprehensively arrange various engineering and technical pipelines on the ground and underground.

(6) Make full use of the terrain, rationally organize the vertical layout, make full use of the natural drop, reduce the amount of earth and stone, speed up the construction of the project and save investment.

(7) Improve the greening and beautification of the plant area to improve and create artificial space environment.

3.2. Civil construction design

The design of this project strictly implements the relevant building structure design rules and specifications promulgated by the state. On the basis of process design, civil engineering design will fully meet the technical requirements of process production, combine local materials, use local materials, and strive to ensure the safety and application of buildings, economical and beautiful, and the basic design plan is based on the geological survey report provided by the local engineering geological department. determine. The main criteria adopted for project construction include:

(1) "Uniform Standard for Building Structure" (GBJ68-84);

(2) "Code for Loads of Building Structures" (GB50009-2001);

(3) "Code for Design of Foundations for Building Foundations" (GB50007-2002);

(4) "Code for Design of Concrete Structures" (GB50010-2002);

(5) "Code for seismic design of buildings" (GB50011-2001);

(6) “Code for Design of Mines and Mines Road” (GBJ22-87);

(7) "Code for waterproofing of architectural design" (GBJl6-2001);

(8) "Technical Specifications for Roofing Engineering" (GB50207-94);

(9) "Code for Design of Building Floors" (GB50037-96);

(10) "Code for Design of Masonry Structures" (GB50003-2001);

(11) "Code for Design of Steel Structures" (GBJl7-88);

(12) Technical Specification for Building Pile Foundation (JGJ94-94);

(13) Technical Specification for Steel Structure of Portal Steel Frame Light House (CECSl02-98).

The plant should be able to withstand the natural conditions of basic wind pressure, basic snow pressure, and basic seismic intensity. Structural selection and foundation treatment shall be determined according to geological survey conditions and the "Classification Standard for Building Seismic Fortification" GB50223-95 and "Code for Seismic Design of Buildings" GB50011-2001.

3.2.1, plant design plan

The proposed production land boundary is 30 mu. The total construction area of ​​the proposed plant area is 3000m ² . The proposed plant covers an area of ​​1000m ² and the proposed office and dormitory construction area is 800m ² . The iron concentrate pool covers an area of ​​1200m ² . The proposed green area is greater than 25%.

The roads in each block of the plant are connected to each other, with main roads and secondary roads, of which the main road surface width is 10m. The pavement in the plant area is made of concrete.

In the design of the general plan, in conjunction with the requirements of road traffic, in conjunction with the requirements of the Code for Fire Protection of Building Design and the General Plan for Design of Industrial Enterprises, fire exits are provided around the buildings. The spacing between the roads and surrounding buildings is in accordance with the fire separation. Requirements.

3.2.2, site selection of tailings pond

The tailings pond of the iron ore plant is a debris flow source in a state of high potential energy. It needs to cooperate with various departments such as survey, design, construction, supervision and management to enable it to continue to be used normally. The project is a dry iron powder dry selection project, and the tailings adopts a filtration dry discharge process. Tailings productivity is less than 10%. According to the annual design output, the annual production of tailings is less than 12,000 tons, and it is piled up in the ditches in the plant area after filtration. Prepare the backfill for use.

Chapter IV Public Works

4.1. Adoption of specifications

(1) Design Specification for Power Supply and Distribution System (GB50052-95);

(2) "Design Specification for Low Voltage Distribution (GB50054-95)";

(3) "General Power Equipment Distribution Design Specification (GB50055-93)";

(4) "Industrial Enterprise Lighting Design Standards (GBJ50034-93)";

(5) Design Specification for Substation of 10kV and below (GB50053-94);

(6) Design Code for Building Water Supply and Drainage (GB50015-2003);

(7) "Outdoor Water Supply Design Code (GBJ13-86, 1997 Edition)";

(8) "Outdoor Drainage Design Code (GBJ14-87, 1997 Edition)";

(9) Sanitary Standard for Drinking Water (GB5479-89).

4.2. Water supply and drainage 4.2.1 water supply

In the proposed project year, the selected iron fine powder is 125,400 tons, and the average water consumption per ton of iron fine powder is 4m ³ . The annual water consumption is 510,600 m ³ , and the annual demand for new water and water is 220,100 m ³ (the circulating water can save 60% of water). The current water source is seriously insufficient. The proposed project needs to open a new deep well with 1 eye, and the water output is 80t/h. It can fully meet the water supply needs of the whole plant (including production water, domestic water and green water).

4.2.2 Drainage

(1) The indoor drainage adopts the diversion value drainage system, which discharges the clean water and sewage separately, and the cleaned water is directly discharged into the drainage pipe of the plant. The domestic sewage is discharged into the discharge pipe of the plant after being treated by the septic tank. The domestic sewage discharged from the plant area is discharged into the municipal sewage pipeline network together. The rainwater is discharged into the municipal rainwater pipeline after confluence.

(2) The drainage of the plant area adopts the combined flow system, and the cleaned water discharged from each monomer is collected along the road. The septic tank processes the domestic sewage and the rainwater in the plant area, and finally discharges into the municipal sewer.

4.2.3 Fire protection

The firefighting adopts temporary high-pressure system, and the fire in the plant area is counted at the same time. The fire-fighting object is iron fine powder processing workshop, secondary fire-resistant grade, Ding production, outdoor fire water volume 50L/S. Indoor and outdoor fire water is supplied by the fire water supply station. The indoor fire water is supplied from the pressure tank ten minutes before the water is used. After ten minutes, the fire pressure pump is used to pump water from the fire pool. The distance between outdoor fire hydrants is not more than 120m, and the water supply network in the plant area is arranged in a ring shape; indoor fire protection in factory buildings and offices should be equipped with automatic sprinkler system and fire hydrant, salon belt, water gun and mobile fire extinguishing equipment according to relevant regulations.

4.3. Heating and ventilation

4.3.1 Basis for preparation

(1) "Design Specification for Ventilation and Air Conditioning" (GBJ19-87);

(2) "Design and Sanitation Standards for Industrial Enterprises" (TJ36-79).

4.3.2 Project meteorological overview

County meteorological reference data of Wanshou Sub-district Office:

Winter heating outdoor calculation temperature: -20 ° C;

Winter ventilation outdoor calculation temperature: -10 ° C;

Summer ventilation outdoor calculation temperature: 29 ° C;

Annual average wind speed: 2.9m/s;

The hottest month average relative humidity: 73%;

The coldest month average relative humidity: 44%.

4.3.3 Heating

The heating boiler is a 8t/h circulating heating boiler. The system is sent up and back, arranged in the same program to reduce the pressure difference between the risers. The main pipe is ground-covered. The system consists of a workshop heat inlet, main pipe, riser and radiator. The heating system is continuously operated, and the workshop is shut down and the shift is changed to the low-load operation state of duty heating to achieve the purpose of energy saving and emission reduction.

4.3.4 Ventilation

1 ventilation dust removal program

The workshop is equipped with roof ventilators according to the process requirements to ensure that the working environment meets the sanitary standards.

2 dust removal equipment

The bag type dust collector is used, and the filtering wind speed is controlled within 1.0 m/min to achieve higher filtration efficiency of the fine dust. A single-stage dust collector is used in a system with a small air volume, and a rotary back-flush bag dust remover is used in a system with a large air volume.

4.4. Supply and distribution 4.4.1 compilation scope

The iron powder selection auxiliary production and living department of the proposed iron powder selection project calculates the power load calculation, the distribution lighting design principle and the design principle of the power distribution line (excluding the design of the power supply outside the plant).

4.4.2 Calculation method

The power load of the project construction workshop and auxiliary production department is Grade III load. The power load is calculated by the required coefficient method, and the lighting load is calculated by the unit area volume method.

4.4.3 Power and voltage

The high-voltage distribution voltage of the project site is 10KV, the low-voltage distribution voltage is 380V/220V, the partial inspection lighting adopts 36V and 12V, and the rest is selected according to the environmental requirements. Illumination refers to industry standards. Accident emergency lighting is provided at important parts and entrances and exits. In the selection of electrical equipment, electrical piping wiring and power distribution room settings, fire and moisture should be considered. Generally, closed electrical equipment is used. Power and lighting trunks are generally laid by cables along the trench or bridge. The branch lines are generally buried in the steel pipe. The power and lighting trunk line adopts VV-1KV plastic copper core power cable, the grinding system installed capacity is 650KW, the magnetic separation system installed capacity is 350KW, and the pump installed capacity is 160KW.

4.5. Transportation

Off-site transportation is carried out by car and is solved by self-provided vehicles and social vehicles. In-plant transportation is carried out using loaders, dump trucks, forklifts and trolleys.

Chapter V Environmental Protection and Safety and Health

5.1. Environmental protection

5.1.1 Environmental Protection Design Principles

Environmental protection adheres to the principle of “prevention first, prevention and treatment, comprehensive management”. All professions jointly take measures to jointly control pollution to meet national and local standards.

5.1.2 Environmental conditions

The proposed project area belongs to the semi-arid continental climate zone, with more wind and less rain, large temperature difference, long sunshine and strong radiation. The site of the plant is relatively flat, and the surrounding area of ​​the plant is not adjacent to the residential area, and there is no harm to the project.

5.1.3 Main pollution sources and major pollutants of the project

(1) Dust (atmospheric environment): Dust generated during ore transportation; Dust generated during the selection of iron fine powder and dust generated during the windy season of the dry slope of the tailings pond.

(2) Waste water (water environment): It is mainly the wastewater generated by the magnetic separation process and a small amount of domestic sewage.

(3) Noise (acoustic environment): Noise generated by equipment operation during ore crushing, ball milling, and magnetic separation.

5.1.4 Environmental protection standards and regulations referenced by the project

(1) Environmental Protection Law of the People's Republic of China (revised in 1989);

(2) Law of the People's Republic of China on Prevention and Control of Atmospheric Pollution (revised in 2000);

(3) Law of the People's Republic of China on Prevention and Control of Water Pollution (revised in 1996);

(4) Law of the People's Republic of China on Noise Pollution Prevention and Control (1996);

(5) Law of the People's Republic of China on the Prevention and Control of Solid Waste Pollution (2005);

(6) Law of the People's Republic of China on Environmental Impact Assessment (No. 77 of 2003);

(7) Law of the People's Republic of China on Cleaner Production Promotion (2002);

(8) Regulations on Environmental Protection Management of Construction Projects (Order of the State Council Order (1998) No. 253);

(9) Regulations on the Administration of Environmental Protection Classification of Construction Projects (Order No. 14 of the State Environmental Protection Administration);

(10) Implementation Rules of the Water Pollution Prevention and Control Law (March 2000);

(11) "Design Regulations for Environmental Protection of Machinery Industry" (JBJ16-88);

(12) "Integrated Emission Standards for Air Pollutants" (GB16297-1996);

(13) "Environmental Air Quality Standards" (GB3095-1996);

(14) Boiler Air Pollutant Emission Standard (GB13271-91);

(15) "Noise Standard for Industrial Enterprises Boundary" (GB12348-90);

(16) "Sanitary Standards for Industrial Enterprises Design" (TJ36-79).

5.1.5 Pollutant prevention measures

(1) Exhaust gas and dust

Exhaust gas emission should meet the Class II standard of Integrated Pollutant Emission Standard (GB16297-1996), Class II time zone standard of Boiler Air Pollutant Emission Standard (GB13271-2001), and Emission Standard of Odor Pollutant ( GB14554-93) Table 2 emission standards.

In the design, in addition to the low-drop and effective sealing facilities in the production and transportation process, it is necessary to adopt a dust removal system suitable for dust content and characteristics, with high dust removal efficiency, good reliability, operation and maintenance. Convenient dust removal equipment.

Dust-producing equipment and mechanized transportation equipment are closed and exhausted. After dust removal, the exhaust is exhausted. The height of all exhaust cylinders is not less than 15m. The indicators meet the following requirements:

Factory boundary pollutants <1.5mg/m ³ ;

The dust emission concentration is <120 mg/m ³ and the emission is <3.5 kg/h.

(2) Waste water

The total daily water consumption of the project is 1520m ³ , of which the new water volume is 608m ³ , the filtered water is recycled, and the circulating water utilization rate is over 60%. The main pollutants of the domestic sewage discharge are COD and ammonia nitrogen, and their concentrations are 400mg/l and 25mg/l. The water quality meets the Class III standard of Integrated Wastewater Discharge Standard (GB8978-1996). Because it does not contain toxic substances and is easily biodegraded, the domestic sewage is discharged into the treatment station and discharged to the standard, which has no impact on the surrounding environment.

The production wastewater is recycled system, the water resources are used reasonably, and then discharged to the standard. The tailings slag is discharged into the tailings pond. The wastewater quality of the production plant is mainly characterized by suspended solids. The suspended solids are mainly inorganic solids such as mineral powder and gangue waste. The treatment of wastewater can be carried out by gravity separation treatment to meet the requirements of reuse and discharge. The treatment of wastewater by the pool not only solves the purpose of tailings concentration and energy-saving transportation, but also solves the need for recycling of wastewater (including tailings water). The dust removal wastewater, washing wastewater and overflow wastewater from each workshop shall be collected and included in the tailings concentration tank for treatment and reuse; the cleaner return water cooled by the equipment shall be collected and sent to the circulating pool for reuse.

The selected ore circulating water system is characterized by large flow and long process. When there is no high-level storage tank, the system adjustment ability depends on the circulating pool. To determine the volume of the suction pool, you should master the process and facilities experienced by the circulating water pressurization into the sorting operation and return to the ring pool, measure the total capacity of the process system, and estimate the various equipment containers in the system that may be experienced from empty to filled water overflow. Time and flow, according to which the volume of the sink is determined. When the circulating water is sent into the system, the circulating water returned when the pool is close to the low water level has entered the sink to replenish water, which will not cause pumping and water cut, and when the sorting series is reduced, the excess circulating water in the system can be stored in the sink without causing excessive Overflow discharge. The volume of the circulating pool generally takes 30 minutes to 2 hours of system circulating water, and the specific size is determined according to the site conditions. Considering the characteristics of a small amount of suspended solids in the water raft, the circulating pool should be cleaned regularly. In order to make the circulating water system supply normally during the clean-up period, it is recommended that the circulating pool be divided into at least two compartments, and the connecting valve at the bottom is connected. During the period, the communication valve is closed, the cells are cleaned, and the water circulation system is maintained.

A small amount of domestic sewage can be directly discharged after simple treatment.

(3) Noise

The noise source of this project is mainly grinding, fan equipment, etc., and its operating noise value is 85~90dB(A). In order to improve the operating environment, control the noise generated by the power equipment within the allowable range of the standard, design the equipment selection, select the equipment with advanced low-noise equipment, and take appropriate noise reduction measures, such as the unit foundation gasket, so that Separated from the building structure; the fan is installed in the air inlet and outlet; the equipment is arranged away from the administrative office area and the living area to set up the soundproof machine room; the operation room is sound-absorbing and sound-proof; the noise-proof duty room is set for the staff, and the noise noise control room noise control is in the country. Within the standard; planting noise-reducing plants around the plant area and around the high-noise workshop. After adopting these measures, the noise can reach the Class III standard in the Noise Standard for Industrial Enterprises Boundary (GB12348-90), that is, less than 55dB (A) at night and less than 65dB (A) during the day.

(4) tailings pond

The tailings pond is a dangerous source of artificial debris flow with high potential energy. During the tailing and running process, various natural and artificial disadvantages threaten the safety of the tailings pond at all times or periodically. If there is a danger, it will cause huge disasters and losses to industrial and agricultural production and the lives and property of the downstream people.

The tailings pond is the largest environmental project for the selected iron concentrate plant. The tailings storage location must first be selected. Please have a professionally qualified design unit for detailed design. The construction of the tailings facility must be based on the long-term planning of the mine production service life. The construction period of the tailings pond facility project is long and must be constructed in advance to ensure production. The construction of the tailings pond must be strictly in accordance with the basic construction procedures, avoid design, construction and production. The tailings reservoir project must carefully implement the technical responsibility system regardless of design, construction and production management. The design should be strictly implemented and the construction should ensure quality. Design funding is recommended to account for more than 30% of the total project investment.

5.1.6 Soil and Water Conservation Measures

During the construction and production of the selected fine iron powder, construction projects such as plant construction and tailings discharge may damage the original topography and cause soil erosion. Therefore, it is necessary to take appropriate soil and water conservation measures. The tailings dam is built in the tailings reservoir area. If the tailings stored in the reservoir are exposed to the water surface, the tailings will be exposed to wind and pollute the environment. After the tailings pond is closed, the soil is covered on the tailings. After the land is planted, trees such as poplar and seabuckthorn are planted for greening to prevent new soil erosion.

Greening of the plant area is one of the important measures for environmental protection, and it is also an important symbol of the construction of factory civilization, and is an indispensable part of the planning and design of the factory. The project plans to adopt brick and wall construction around the plant area, planting trees in the plant area for greening water and soil conservation measures, and matching good tree species and plants. The focus of greening is mainly on both sides of the road and the surrounding space around the building, using jostle, shrubs and shrubs. It is matched with hedges; the lawn and flowers form a beautiful layout of the factory layout, and use green plants to improve the environment, create beautiful and comfortable production and living conditions for employees, and promote production development.

5.2. Labor Protection and Safety 5.2.1 Design Code

The design of labor safety and hygiene complies with the principle of “strengthening labor protection, improving working conditions”, “safety first, prevention first”, and implementing the safety requirements of labor safety in various professional designs to achieve “safe and reliable, healthy” Advanced technology and economic rationality." The engineering facilities shall comply with national and local standards and norms concerning labor safety and health.

5.2.2 Design basis

(1) "Sanitary Standards for Industrial Enterprises" (TJ36-79);

(2) "Code for Design of Noise Control for Industrial Enterprises" (GBJ8785);

(3) "Design Regulations for Occupational Safety and Hygiene of Machinery Industry" (JBJ16-88);

(4) "Safety Design Specification for Electrical Equipment" (GB4046-83);

(5) "Code for lightning protection design of buildings" (GBJ57-83);

(6) "Industrial Enterprise Lighting Design Standards" (GB50034-92);

(7) Safety Regulations for Intra-plant Transportation of Industrial Enterprises (GB4378-84).

5.2.3 Labor safety

1. After the implementation of this project, there is no danger of dangerous materials and explosions. In the production process, fire protection work focusing on fire prevention work is mainly done.

2. In accordance with national standards and norms, combined with the actual production situation of enterprises, establish and improve the enterprise safety and health management system.

3. Establish strict operating procedures and maintenance systems, establish an effective inspection system, require workers to operate in strict accordance with the regulations; trainers must carry out technical and safety training, and pass the examination before they can be certified.

4. According to the regulations, timely release of corresponding labor protection articles for employees in different positions, and supervise normal use; in order to protect the physical and mental health of employees, regular physical examinations should be carried out for production personnel, and the physical condition of employees should be timely grasped; Necessary women's health room.

5. In the section where there are many hot and humid gases, the combination of mechanical ventilation and natural ventilation is used to discharge the hot and humid air, and a local air supply port is provided in the worker's operation zone to achieve the purpose of cooling, dehumidification, anti-condensation and sending working conditions.

6. The plant design considers the requirements of natural lighting and natural ventilation of the building, and the spacing between the buildings meets the requirements of the design specifications.

7. Purchase low-noise equipment; for some high-sound power equipment, purchase special vibration-damping and noise-eliminating equipment with the equipment; for short-term need to approach the noise equipment, wear appropriate labor protection equipment.

8. Set a safety shield for the mechanical transmission part that may cause an accident, and set a warning sign for the risk factor.

9. Design the lightning protection and grounding system. The grounding system adopts the equipotential method to ensure the safety of people, equipment and buildings.

10. Regularly check the safety of electrical equipment. All electrical equipment is protected grounded or zeroed.

11. Accident safety signs and emergency lighting are provided at the main passages, entrances and exits, stairs, etc. of the production workshop. In the event of an accident or power outage, it can be put into use immediately to ensure the safe evacuation of workers in the workshop.

12. The low voltage system uses a transformer neutral point to directly ground the TN-S grounding system. The protection zero junction PE and the working neutral line N are separated from the low voltage side of the transformer.

13. Electrical equipment The metal casing and the wire metal protection pipe that are not charged under normal conditions are protected by the neutral wire. The lighting circuit is provided with short-circuit protection, and the local lighting device is fixed on the moving structure to have anti-wear and anti-tension protection measures. The new factory is equipped with lightning rods and the grounding resistance is >10Ω.

14. There should be obvious safety warning signs for each section of the workshop production area. All mechanical transmission parts in the workshop shall be provided with protective covers. Ensure the safety of the staff.

5.2.4 Labor hygiene

Dust-producing equipment and mechanized transportation equipment are sealed and ventilated, and discharged into the atmosphere after dust removal. The skylight is installed in the workshop to remove waste heat with natural wind. Vibrating ball mill in the factory, vibrating screen machine is relatively noisy, and the sound insulation chamber is sealed. Workers should wear earplugs when entering.

5.2.5 Labor safety and health institutions

The project has a special person responsible for the daily supervision of labor safety and health.

5.3. Fire protection

Most of the buildings in this project are Grade II fire protection grades, and some are Grade I or Class III fire protection grades. In the design, the "Code for Fire Protection of Building Design" (GB50016-2006), "Code for Design of Fire Extinguishers for Buildings" (GB50140-2005), and "Code for Fire Protection of Interior Design of Buildings" (GB50222-95) are strictly implemented. Fire equipment and facilities are provided as required.

1. The fire hazard of each building in this project belongs to Class C. The fire resistance rating of the building should be no less than two grades. The frame structure should be treated with fireproof coating to make the components meet the fire endurance limit. A smoke-type fire alarm detector is installed in the warehouse, and a fire alarm signal is sent to the fire duty room.

2. The fire alarm room is equipped with two bus fire alarm devices and linkage control devices. The location of various alarm signals and alarm points can be displayed in the fire duty room, which can control the operation of various fire-fighting equipment such as fire pumps, spray pumps, exhaust fans and display their operating status.

3. When it is confirmed that a fire has occurred, a control signal can be issued in the fire alarm room to cut off all non-fire power sources at the corresponding locations.

4. Fire water requirements should be met. If necessary, fire water pools and fire water supply stations can be set up in the plant area. The project has a water source well in the plant area, and fire hydrants and fire extinguishers are installed at key parts. The project fire hydrant system and automatic sprinkler system can be temporarily high pressure system. The fire water for the first 10 minutes of the fire is supplied by the fire pressure water supply equipment installed in the fire water supply station. After 10 minutes, the fire pump and the spray pump supply water.

5. The fire resistance of buildings, the amount of water used for indoor and outdoor fire hydrants, and the amount of water used for automatic spraying should meet the requirements. Disposed in each building specification shall ammonium phosphate salt dry powder fire fighting equipment and other mobile equipment.

6. The fire protection of the production workshop should be designed with sufficient fire hydrant system facilities. The fire-fighting electricity should be supplied by the double power switch box, and the fire emergency light should be equipped with the emergency power supply.

7. Civil engineering design and building spacing should meet the requirements of fire protection regulations. The production plant shall be equipped with firewalls and fire doors according to the requirements of fire prevention area in the building fire protection code.工程按三类工业建筑设计防雷接地系统，保护接地、防雷接地及工作接地均应符合要求，总接地电阻不应大于l欧姆。为保证生产安全、方便疏散，生产车间出入口均设应急指示灯。

8.公司已建立健全完善的消防和管理体系，并配有专兼职消防人员。项目投产后，需对职工再进行系统的防火教育，加强安全意识，充实消防力量，建立健全消防制度。

9.电气装置中所有由低压配电盘引出的电缆，低压配电盘处及引出低压配电室处的电缆外皮均涂防火漆。所有穿线管口及预留洞口，在电缆敷设完毕后均须采用防火堵料严密堵塞。

10.项目工程厂房及建（构）筑物上易受雷击的部位，设避雷针及避雷带。

第六章 项目施工进度

6.1.项目建设期

项目一期工程的建设期初步定为：6个月。从2008年8月开始，二期工程的建设期预计10个月，到2009年末竣工。

6.2.项目阶段概况

本项目获批后，应与引进设备的厂方进行商务谈判，签订引进技术合同；同时提出工艺参数供设计单位工艺设计，与设计有关的资料应在设计开始前提供给设计单位。

项目一期工程实施计划进度建议前期准备工作及商务谈判2个月；土建工程和设备安装调试约需6个月；调试合格后，进行试生产工作约需2个月；共6个月时间。

第七章 投资概算及财务分析

7.1．工程投资概算

7.1.1.投资概算

本项目一期工程投资为800万元，其中：

1）设备购置费用为453万元；

2）土建工程费用为220万元；

3）无形及递延资产费用25万元，包括工程监理费、建设单位管理费、勘察设计费、咨询调查费、人员培训费；

4）预备费用只列基本预备费，按费用总值的5%计算，基本预备费为40万元；

5）流动资金为62万元。

（注：本次投资估算不包含土地费用。详见投资估算表。）

7.1.2．编制依据

土建专业: 根据当地类似工程按平方米建筑面积单位指标估算；

机械设备：按当前市场咨询价格估算；

其它费用标准：按当地招商引资优惠政策和市场价格执行。

7.2．财务分析7.2.1.项目内部收益率（IRR）

式中：R-内部收益率

–在t年的收益

–在t年的费用

n –项目评价期（年）

项目内部收益率（IRR）为668.45％，大于基准折现率13.0%。（详见附件：建设投资估算表营业收入、营业税金及附加和增值税估算表）

7.2.2.净现值（NPV）

=6107.48 (万元) （详见附件：财务计划现金流量表）

7.2.3.盈亏平衡分析

= 61.02%

以上说明，正常年份当生产能力达到设计生产能力的61.02%，企业即可保本，因此项目抗风险能力较强。

7.3. 资金筹措

项目一期工程总投资800万元。项目所需资金全部由投资方自筹解决。融资方案较简单，资金来源充足，融资成本较低，融资风险较小。（详见附件：资产负债表）

第八章 组织机构与劳动定员

8.1.组织机构

法人资格的企业，生产管理和经营完全按照现代企业的机制运行。应本着高效、实用的原则配备一套完整的生产、经营、服务管理机构。

企业组织实行董事会领导下的总经理负责制，按照现代企业制度的要求，坚持有利于生产、减少层次、职责分明、提高效率的原则设置管理机构。项目的建设生产经营等完全实行自主经营、自负盈亏、风险与业绩挂钩，与市场经济相适应的经营管理机制。

8.2. 劳动定员

该项目总定员100人，其中管理技术人员23人，操作工人77人。

主要生产系统采用三班、每班八小时工作制，其于采用一班或两班，每班八小时工作制。

企业投产前的职工培训非常重要，企业能否按时达产，发挥投资效益，很大程度上取决于培训工作的质量，职工培训的目的是为企业生产和经营管理提供合格的人员，以达到安全高效的生产和经营。应进行全员培训并突出重点生产和工作岗位上人员培训。培训可就近到相关厂进行，培训结束后应进行考核，考核合格后方可上岗，严禁无培训上岗。

第九章 可行性研究的结论

9.1结论

综上所述，本项目技术上可靠，经济上可行，项目产品的市场前景广阔，建设条件优越，工艺技术成熟可靠。项目具有很好的财务盈利能力和较低风险，经济效益和社会效益显著。有利于繁荣地方经济，扩大就业，提高当地人民收入，创造多赢局面。可以带动一批相关企业的发展，优化钢铁行业的产业结构。实施该项目，社会意义巨大，可以提供一定的就业岗位，并开拓新的税源，提高产品档次，增加市场竞争力，同时也提升了地区产业整体技术水平，带动相关行业的发展，促进地方经济的发展，为改变当地较为落后的经济结构创造条件。所以，项目可行。

9.2建议

项目占地未经土地部门建设项目用地的预审，属于临时用地。对于项目建设用地的可行性，本报告未作评价，需另行分析。

尾矿设施直接威胁到选矿厂的正常生产、矿产资源的持续开发利用和环境保护，特别是下游人民的生命财产安全。要充分认识尾矿设施在选矿中的重要地位。尾矿库的建设必须安全可靠，万无一失。在汛期，尾矿坝应作为要害设施，日夜巡查，杜绝险情。生产管理要配备足够的技术力量和维护人员，经常观测检查。

第十章 附件

Drawings:

附图1：县矿业有限公司建设项目地理位置图；

附图2：县矿业有限公司厂区布置平面图。

附表：

附表1：设备购置费估算表；

附表2：建设投资估算表；

附表3：资产负债表；

附表4：营业收入、营业税金及附加和增值税估算表；

附表5：项目投资现金流量表；

附表6：利润与利润分配表。

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