Natarya V. Fomchenko other studies of microorganisms containing Fe 3 + solution chemical oxidation of arsenic-containing pyrite and gold pyrite concentrate. During the chemical oxidation process, the most oxidizable elemental sulfur is removed. After chemical leaching of the arsenic pyrite concentrate, the oxidation rates of sulfide iron and arsenic were 64.3% and 31.1%, respectively. For pyrite concentrates, the oxidation rates of sulfide iron and sulfur are 21.2% and 25.8%, respectively. The biooxidation of arsenic pyrite and gold-bearing iron ore concentrates is carried out in batch (control) and two-stage (test) reactors in batches. The biooxidation of sulfide concentrates in the control test without pre-oxidation of Fe 3 + solution (a process) and pre-oxidation by Fe3+ solution (two-stage process) was investigated. After oxidation for 4 days, the oxidation rate of sulfide arsenic in the arsenopyrite concentrate was 38.4% in the control stage, 92.8% in the experimental stage, and the cyanidation recovery of gold was 67.76% and 92.95%, respectively. After 8 days of oxidation, the oxidation rate in the control stage was lower than that in the test stage after oxidation for 4 days: the oxidation rate of sulfide arsenic was 59.7%, and the gold recovery was 82.38%. In the control stage, the biooxidation time of pyrite was 36d, while in the experimental stage was 5d, the oxidation rates of sulfide iron and sulfur were 40.3% and 55.7%, respectively, and the recovery of cyanidation of gold was 76.9%. The test results show that the two-stage bio-chemical oxidation method is very promising for the enhancement of the biohydrometallurgical process of refractory sulfide ore concentrates containing not only colored metals but also noble metals.
2inch Slackline Kits Trickline
Specification:
* Practical: WINNERLIFTING Full Slackline Kit lets you get the most out of your workout; Provides a full body workout which improves your core, posture, and leg strength while enhancing your balancing skills and sharpens your focus.
* Fun: All-age outdoor family fun while showing off your trick and balancing skills; Whether in your backyard, the park, or beach, this kit is a great game to enjoy with friends and family
* Durable: SOLID. SUPERIOR Main slackline with 5T BREAK LOAD (safely carries 300 lbs) ratchets for better pulling strength and line from abrasion ratchet protector to PROTECT YOUR FEET while on the slack line. Whether you are a beginner slacklining for fun, or a pro athlete ninja looking to improve strength, this balance line is a great option as a beginner slackline, slackline for kids, slack lines for backyard for adults
* Safe: No need to worry about damaging the trees during use – this kit comes with 2 tree protectors that keep any tree and any user out of harm`s way; Only anchor to trees that have a diameter of at least 1 foot; For less wobble, use trees that are closer together
* Contents: Package includes (1) 50feet and above x 2-inches slackline; (1) 50feet and above training line; (2) Tree guards; (1) Drawstring adventure bag; (1) Color box packing. (1) Instruction booklet
* EASY SET UP: Easy set up in just a matter of minutes. Slackline kit includes a [step by step" visual instruction booklet
2Inch Slackline Kits Trickline,Slackline Kits Trickline,Slack Rope Long Line,Slackline Industries Baseline
WINNERLIFTING SAFETY EQUIPMENT CO., LTD. , https://www.winner-lifting.com