The deposition sites, gold deposits can be divided sand. (l) residual sand gold deposit, (2) slope sand gold deposit, (3) flood deposit gold deposit, (4) river bed alluvial gold deposit, (5) shoreshore gold deposit.
The beneficiation of gold deposits mainly uses re-election method and amalgamation method. The entire beneficiation process consists of the following operations.
I. Preparation before dressing
The preparation work before the selection mainly includes the disintegration, classification, cleaning and de-sludge of the sand mine. The disintegration is to break up the sand and sand that has been bonded to the monomer and break it into monomer particles to separate the valuable mineral monomers. Grading is the separation of coarse gravel that does not contain gold and other heavy minerals, reducing the amount of selected ore and making the selected material uniform in particle size. Disintegration and grading operations are usually carried out in the same equipment as a cylindrical screen or a flat screen, and can also be used for washing and deliming at intervals.
Second, the selection of homework
Generally, a large fixed chute is used to select the coarse concentrate, and then the gold concentrate plate or the small fixed vortex tank and the gold pan are used to select and collect the gold concentrate for the coarse concentrate. In order to improve the recovery rate of gold and comprehensively recover other heavy minerals, the roughing operation can also use a jig to replace the chute, and replace the gold pan with a jig and a shaker. At this time, the product from the rough selection operation is heavy sand. The typical process of sand gold mining renting.
The heavy sand separation operation is mainly used to remove the light minerals and stone minerals remaining in the heavy sand, and to separate other heavy minerals to propose gold. The commonly used beneficiation equipment is a shaker, a jig, a mercury amalgamation cylinder, a magnetic separator, an electric separator, and the like. After these equipments were treated with heavy sand, the gold department was concentrated in the mercury paste.
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