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Method for recovering multiple metals from complex antimony-containing gold ore

A multi-metal and gold mining technology, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of secondary pollution, high energy consumption, and the need for pyrotechnics, etc., to achieve efficient recovery, reduce production costs, and reliable strong effect

Active Publication Date: 2017-11-07
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant researchers have proposed some treatment methods. The patent "a process for separating antimony and gold while smelting antimony" (CN104152721B) treats high-antimony concentrates with relatively high grades and almost only two elements, antimony and gold. Pyrotechnic process is required, which consumes a lot of energy; the patent "A New Process for Recovering Antimony from Antimony-Containing Gold Concentrate" (CN104831315A) only recovers the antimony in it, and uses the cyanide process to extract precious metals, which is prone to secondary pollution , the value of antimony sulfide produced in the wastewater treatment process is not high; therefore, it is necessary to develop an environmentally friendly method for the efficient separation and comprehensive recovery of antimony-containing gold concentrates

Method used

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  • Method for recovering multiple metals from complex antimony-containing gold ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The composition of antimony gold concentrate is Sb23.5%, Au65g / t, S21.5%.

[0017] Take 2t of antimony-containing gold concentrate.

[0018] 1) Leaching: The antimony-containing gold concentrate ore powder is leached with 10% alkali solution (mixed with sodium sulfide and caustic soda), heated by steam to control the temperature at 75°C, and the leaching reaction time is 1h. The alkali solution and antimony-containing gold concentrate The mass ratio of ore powder is 0.5, oxygen or air is introduced into the leaching process, and the flow rate of oxygen or air is 0.5m 3 / min, filtered after leaching, the filtrate is sent to the electrowinning process, and the filter residue is sent to the gold extraction process;

[0019] 2) Electrodeposition: Step 1) The filtrate produced by leaching is heated to about 40°C, transferred to the electrolytic cell for electrowinning, antimony is precipitated on the cathode steel plate, and the waste electrolyte produced by electrowinning ...

Embodiment 2

[0025] The composition of antimony gold concentrate is Sb35.5%, Au35g / t, S28.5%.

[0026] Take 2t of antimony-containing gold concentrate.

[0027] 1) Leaching: The antimony-containing gold concentrate powder is leached with 35% sodium hydroxide solution, heated by steam to control the temperature at 90°C, and the leaching reaction time is 2.5h. The mass ratio of the alkali solution to the antimony-containing gold concentrate powder is 2. Oxygen or air is introduced during the leaching process, and the flow rate of oxygen or air is 1.5m 3 / min, filtered after leaching, the filtrate is sent to the electrowinning process, and the filter residue is sent to the gold extraction process;

[0028] 2) Electrodeposition: Step 1) The filtrate produced by leaching is heated to about 50°C, transferred to the electrolytic cell for electrowinning, antimony is precipitated on the cathode steel plate, and the waste electrolyte produced by electrowinning is sent to the crystallization process...

Embodiment 3

[0034] The composition of antimony-containing gold concentrate is Sb42.6%, Au185g / t, S16.5%.

[0035] Take 2t of antimony-containing gold concentrate.

[0036] 1) Leaching: The antimony-containing gold concentrate ore powder is leached with 20% circulating alkali solution, heated by steam to control the temperature at 70°C, and the leaching reaction time is 3h. The mass ratio of the alkali solution to the antimony-containing gold ore concentrate ore powder is 3, Oxygen or air is fed into the leaching process, and the flow rate of oxygen or air is 2m 3 / min, filtered after leaching, the filtrate is sent to the electrowinning process, and the filter residue is sent to the gold extraction process;

[0037] 2) Electrodeposition: Step 1) The filtrate produced by leaching is heated to about 45°C, transferred to the electrolytic cell for electrowinning, antimony is precipitated on the cathode steel plate, and the waste electrolyte produced by electrowinning is sent to the crystalliz...

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Abstract

The invention discloses a method for recovering multiple metals from complex antimony-containing gold ore. The method comprises the following steps: after concentrated antimony-gold ore or tailings are dissolved by utilizing sodium sulphide or caustic soda flakes, introducing steam and oxygen into a leaching tank to dissolve the antimony in the ore in a leaching liquid; filtering, performing electrodepositing on the leaching liquid through an electrolyzing process, and separating the antimony in a cathode plate to obtain a raw antimony; recovering the antimony, performing a sodium sulphide removing regenerating process on the solution of which the antimony is recovered, and performing low-temperature crystallizing to obtain sodium sulphide nonahydrate crystals; refining the leached slag by adopting ball grinding; oxidizing and leaching by adopting high-temperature air; and performing a carbon-in-pulp process on the leaching liquid to obtain gold-loaded carbon, wherein the total recovering rate of the antimony and the gold reaches over 95 percent. The overall process is high in reliability; secondary pollution cannot be caused; the production cost is reduced; and environment-friendly clean production is realized.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a comprehensive utilization technology for efficiently recovering polymetallics from complex antimony-containing gold ores. Background technique [0002] At present, there are a large number of antimony-containing gold mines in my country, but antimony is a harmful element in the production process of gold smelting enterprises. This element affects product quality, affects leaching indicators, and reduces the recovery rate of precious metals Au and Ag. With the shortage of high-quality gold ore resources and the downturn in the industry market, the efficient extraction of complex and refractory gold ores has become the key to increasing profits in the gold smelting and processing industry. However, the existing comprehensive utilization technology of antimony-containing gold ore, whether it is fire method, wet method or a combination of the two, has certain defects in t...

Claims

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Application Information

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IPC IPC(8): C22B3/12C22B3/04C22B11/00C22B3/24C22B30/02C25C1/22
CPCC22B3/04C22B3/12C22B3/24C22B11/04C22B30/02C25C1/22Y02P10/20
Inventor 鲁兴武朱来东余江鸿李俞良陈一博程亮易超马爱军陈文波张恩玉曹桂银
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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