Method for sorting gold from gold-bearing high-arsenic tailings

A technology of tailings and arsenic ore, which is applied in the field of gold separation, can solve problems such as waste of resources, and achieve the effect of simple process and low recycling cost

Inactive Publication Date: 2010-05-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a large number of gold-containing and high-arsenic tailings in my country are currently idle, and some grades can reach 6g / t, which is a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Take gold-high-arsenic mine tailings from a place in Liaoning and grind them to ≤200 mesh 3500g, gold content 1.29g / t, add water to adjust the slurry concentration to 35%, add Na 2 SO 3 15g, H 2 SO 4 28g, CuSO 4 3.5g, presoak, stir and activate for 30 minutes, then add 60g of quicklime, 0.042g of butyl xanthate, and 0.01g of butylammonium black medicine according to the weight of the mineral powder before pulping, and stir for 5 minutes to enter the flotation tank. Add 0.021g of No. 2 oil, roughing for 8 minutes, then sweeping for 4 minutes, refining for 2.5 minutes, recovering 0.039g of gold, and the recovery rate of gold is 87.5%.

example 2

[0027] The gold grade of high-arsenic tailings from a gold mine in Liaoning is 1.5g / t. After classification, the ore is ground to ≤200 mesh. After grinding, 3500g of ore powder is taken, and water is added to reduce the concentration to 27%. K 2 SO 3 12g, H 2 SO 4 18g, 3g of anhydrite, pre-soaked, stirred and activated for 20 minutes, then add 16g of quicklime in sequence according to the weight of the mineral powder before pulping, add 0.04g of butyl xanthate, 0.015g of butylammonium black medicine, stir well and send it into Add 0.23g of No. 2 oil to the flotation cell, roughing for 10 minutes, then sweeping for 8 minutes, and refining for 3 minutes to reclaim 0.047g of gold, and the gold recovery rate reaches 90.0%.

example 3

[0029] The gold content of the high-arsenic tailings of Gansu Gold Mine is 1.6g / t. After classification, the ore is ground to -0.074mm. After grinding, 3500g of ore powder is taken, and the slurry is adjusted to 30% by adding water. MgSO is added in sequence according to the weight of the ore powder before slurry adjustment. 3 16g, H 2 SO 4 44g, 1g of barite, presoaked, stirred and activated for 40 minutes, then added 16g of quicklime, 0.044g of butyl xanthate, and 0.018g of butylammonium black powder according to the weight of the mineral powder before pulping, and then sent them into the buoy after fully stirring. Select tank, then add No. 2 oil 1.68g, rough selection for 9 minutes, then sweep for 8 minutes, then concentrate for 3.5 minutes, recover 0.05g of gold, and the gold recovery rate reaches 91%.

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Abstract

The invention relates to a method for sorting gold from gold tailings in gold mines, in particular to a method for sorting gold from gold-bearing high-arsenic tailings. The method comprises the following steps of: grounding gold-bearing high-arsenic tailings into be smaller than or equal to 200 meshes after sieving, mixing into ore pulp of a certain concentration, adding sulphite, H2SO4 and sulphate in sequence, presoaking, mixing and activating for a certain time, adding CaO, butyl xanthic acid and Dithiophosphate BA in sequence, sending to a flotation cell, adding No.2 oil and obtaining golden concentrates after rough sorting and selection. The invention solves the problem of hard recovery of gold and other useful minerals in the gold-bearing high-arsenic tailings, and has the gold recovery rate of over 85 percent, no secondary pollution to environment, simple technology and low recovery cost.

Description

Technical field: [0001] The invention relates to a method for separating gold from gold mine tailings, in particular to a method for separating gold from gold-containing high-arsenic tailings. Background technique: [0002] Due to the different material sources of gold deposits and the multi-stage and multi-stage nature of mineralization, the occurrence states of gold in different ore bodies and different ore types in the same deposit are different, and the occurrence of gold in gold-bearing minerals is also different. It brings certain difficulties to ore processing, and mineral processing generally establishes a mineral processing process. In this process, the ore separation method, chemical dosage, medium and time will all affect the separation and leaching of gold. , which is the reason for the different recovery rates of gold ore beneficiation. Even if it is the same type of ore deposit, the beneficiation process is different, even if the beneficiation process of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/08
CPCY02P10/20
Inventor 张渊孙丰月李俊锋张五荣
Owner JILIN UNIV
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