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Beneficiation method for separating arsenopyrite from high-arsenic gold concentrate

A beneficiation method and gold concentrate technology are applied in the field of separation of poisonous sand from low-grade refractory arsenic-containing gold concentrate, and can solve the problems of unsatisfactory arsenopyrite separation efficiency, high equipment and environmental protection requirements, and difficult management. The phenomenon of reaching the flotation end point is obvious, the comprehensive recovery value is improved, and the operability is strong.

Inactive Publication Date: 2021-12-07
ZIJIN MINING GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the process of this kind of oxidation flotation method is simple and convenient, the operation is strict, the management is difficult, and the requirements for equipment and environmental protection are high, and the separation efficiency of arsenopyrite is not ideal.

Method used

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  • Beneficiation method for separating arsenopyrite from high-arsenic gold concentrate
  • Beneficiation method for separating arsenopyrite from high-arsenic gold concentrate
  • Beneficiation method for separating arsenopyrite from high-arsenic gold concentrate

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This example selects the test sample from a gold concentrate produced by a dressing plant in Gansu, the fineness is P80@49μm (-0.074mm accounts for 91%), the moisture content of the concentrate is 8%, contains a large amount of residual chemicals, and the gold mine contains 23.88g / t, containing 2.21% arsenic and 36.24% sulfur, belongs to low-grade refractory high-arsenic gold concentrate. The main metal minerals in the ore are pyrite and arsenopyrite, a small amount of gold minerals exist as monomers, pyrite and gold are closely connected, and the gangue minerals are mainly quartz.

[0031] In this example, a beneficiation method for separating arsenopyrite from high-arsenic gold concentrates is used to treat the above-mentioned test samples. Gas oxidation, and finally through the "four times of roughing, two times of beneficiation" operation to obtain high arsenic gold concentrate and low arsenic gold concentrate. Such as figure 1 As shown, it specifically includes ...

Embodiment 2

[0039]This example uses the same steps as Example 1 to process the same ore. The main difference is that the pulp aeration and oxidation operation is 10 minutes; the initial redox potential Eh of the roughing operation is about -15mV. Stir the agent for 5 minutes; add 500g / t sodium carbonate in the selection I operation to stabilize the pH value of the ore pulp at about 8.0, and add 500g / t of sodium metabisulfite in the selection I operation to control the oxidation-reduction potential Eh=5mV Left and right, the added butyl xanthate is pyrite and gold collector.

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Abstract

The invention discloses a beneficiation method for separating arsenopyrite from high-arsenic gold concentrate, and belongs to the technical field of flotation separation of the arsenopyrite and pyrite from the high-arsenic gold concentrate. The beneficiation separation technology comprises the technological means of sodium sulfide / activated carbon auxiliary reagent removal, gold concentrate superfine grinding, sodium carbonate / caustic soda flake size mixing, aeration oxidation and the like, low-arsenic gold concentrate is obtained through the technological process structure of four times of roughing and two times of concentration, and flotation middlings and tailings are combined to obtain high-arsenic tailings. Compared with a traditional technology, the beneficiation method for separating the arsenopyrite from the high-arsenic gold concentrate has the characteristics of being high in separation efficiency, easy to control, environmentally friendly and the like, the foam phenomenon is stable in the separation process, the separation end point is obvious and easy to judge, the low-arsenic gold concentrate with the arsenic content smaller than 1% and the high gold content and the high-arsenic tailings with the high arsenic content and the low gold content can be separated out, and the comprehensive pricing coefficient and benefits of gold are improved.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a mineral processing method for separating arsenopyrite from high-arsenic gold concentrates, and is particularly suitable for separating arsenopyrite from low-grade refractory arsenic-containing gold concentrates. Background technique [0002] Pyrite in high arsenic gold concentrate (FeS 2 ) and arsenopyrite (FeAsS) are both gold-bearing minerals. Pyrite and arsenopyrite minerals have basically the same crystal structure, and their natural buoyancy is close, and the gold-bearing minerals on the surface of pyrite and arsenopyrite can easily change their floatability. In addition, the collector adsorbed on the surface of gold concentrate is not conducive to the subsequent separation, so the separation of pyrite and arsenopyrite in high-arsenic gold concentrate is very difficult. At present, most high-arsenic gold concentrates are smelted by ore blending, or pretreated b...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 缪彦杨松涛王乾坤樊怀军李广黄裕卿梁治安孙忠梅赵汝全刘永松马维鑫
Owner ZIJIN MINING GROUP
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