Novel method for separating gold and silver from gold mud

A new method, gold mud technology, applied in the field of gold and silver separation, can solve the problem of excessive metal loss, achieve the effect of reducing process steps, easy control of reaction, and improving gold and silver recovery rate

Inactive Publication Date: 2009-06-10
LINGBAO CITY JINYUAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a new method for separating gold and silver from gold mud, which make

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1: The new method for separating gold and silver from gold mud as described in the present invention includes the following steps: the wet gold mud produced by the cyanidation method, filter paper, and filter cloth are ashed and then water-moistened gold mud is sent into the reaction kettle, and hydrochloric acid and hydrochloric acid are added. The weight ratio of sodium chlorate, wet gold mud, hydrochloric acid and sodium chlorate is 1:1.2:0.25, using steam indirect heating, keeping the temperature in the reactor at 84℃, leaching for 4 hours, gold and impurity elements zinc, lead, copper, After the iron is dissolved, it enters the solution and the silver forms a silver chloride precipitate. After vacuum filtration, the filtrate is a gold-containing solution, and the filter cake is a silver chloride precipitate; the filter cake precipitated by the silver chloride is sent to the displacement reactor to dilute HCl As the medium, it is replaced with iron powder. After...

Example Embodiment

[0015] Example 2: The new method for separating gold and silver from gold mud as described in the present invention includes the following steps: the wet gold mud produced by the carbon slurry method, filter paper and filter cloth are ashed and then water-moistened gold mud is sent into the reaction kettle, and hydrochloric acid and The weight ratio of sodium chlorate, wet gold mud, hydrochloric acid and sodium chlorate is 1:1:0.1, using electric heating method, keeping the temperature in the reactor at 79℃, leaching for 5 hours, gold and impurity elements zinc, lead, copper, After the iron is dissolved, it enters the solution and the silver forms a silver chloride precipitate. After vacuum filtration, the filtrate is a gold-containing solution, and the filter cake is a silver chloride precipitate; the filter cake precipitated by the silver chloride is sent to the displacement reactor to dilute HCl As the medium, it is replaced by iron powder. After the silver powder is washed and...

Example Embodiment

[0016] Example 3: The new method for separating gold and silver from gold mud as described in the present invention includes the following steps: the wet gold mud produced by the cyanidation method, filter paper, and filter cloth are ashed and then water-moistened gold mud is sent into the reaction kettle, and hydrochloric acid and hydrochloric acid are added. The weight ratio of sodium chlorate, wet gold mud, hydrochloric acid and sodium chlorate is 1:1.5:0.4, using steam indirect heating, keeping the temperature in the reactor at 89℃, leaching for 3 hours, gold and impurity elements zinc, lead, copper, After the iron is dissolved, it enters the solution and the silver forms a silver chloride precipitate. After vacuum filtration, the filtrate is a gold-containing solution, and the filter cake is a silver chloride precipitate; the filter cake precipitated by the silver chloride is sent to the displacement reactor to dilute HCl As the medium, it is replaced with iron powder. After ...

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Abstract

The invention provides a novel method for separating gold and silver from gold slime, which comprises: wet gold slime is subjected to one-step chloridizing leaching and filtered; filtrate is a gold-containing solution, and filter cakes are silver chloride deposit; the gold-containing solution is reduced to obtain gold powder which is then smelted into gold ingots; and the filter cakes, namely the silver chloride deposit, are converted into coarse silver powder which are then smelted into silver ingots. The method adopts one-step chloridizing gold leaching reaction to overcome the defect of large metal loss due to long pretreatment flow of the gold slime and high frequency of filtration reaction in the prior art, only uses a hydrochloric acid and sodium chlorate during chloridizing and gold leaching, is easy to control the reaction, removes the process of pre-leaching the gold slime and removing impurities in the prior art, removes multi-step reduction, reduces the processing step, greatly reduces the discharge amount of wastewater, reduces the heating duration, saves the cost of water and electricity, and improves the recovery rate of the gold and the silver and the quality of the gold ingots and the silver ingots.

Description

technical field [0001] The invention relates to a new method for separating gold and silver from gold mud. Background technique [0002] In the past, in the gold mining and smelting industry, pyrometallurgy-water crushing-acid dissolution method and pyrometallurgy electrolysis method were generally used to separate metals from gold mud produced by cyanidation. These two methods have high cost and low recovery rate of gold and silver. Low; with the development and progress of technology, the method of separating gold and silver in gold mud with ammonia water, the method of separating gold and silver by full wet method, etc. have appeared. At present, in gold mining and smelting, most of them adopt the aqua regia method and the controlled current chlorination method. The aqua regia method is to carry out three leaching reactions and three vacuum filtrations on the gold mud in the pure water-nitric acid system solution. Carry out gold reduction on the gold-containing solution,...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B3/10C22B3/22C22B3/46
CPCY02P10/20
Inventor 晋建平刘必兴李虎增王树芳马剑波
Owner LINGBAO CITY JINYUAN MINING
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