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Method for recovering copper, zinc and iron from sulphide ore calcine pickle liquor containing gold and silver

A technology of sulfide ore and calcine acid, which is applied to recover non-ferrous metals in Ag sulfide ore calcine acid leaching solution, and can solve the problems of complex process, pollution of working environment of organic extractant, pollution of environment by heavy metal ions, etc. from the field containing Au. Achieve the effect of simple process, less environmental pollution and low recovery cost

Inactive Publication Date: 2010-10-13
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology is mainly to recover Cu from the calcination acid leaching solution. There is no report on the process of recovering Zn and Fe at the same time, causing heavy metal ions to pollute the environment. Although there is recovery of Cu, the extraction method is the main method, and the process is relatively complicated. The smell of organic extractants seriously pollutes the working environment

Method used

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  • Method for recovering copper, zinc and iron from sulphide ore calcine pickle liquor containing gold and silver
  • Method for recovering copper, zinc and iron from sulphide ore calcine pickle liquor containing gold and silver

Examples

Experimental program
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Effect test

Embodiment 1

[0035] a. Adjust the acid dipping solution containing Fe, Cu and Zn to pH = 3, then heat it to 70°C, add air under the condition of stirring, and the air speed is 0.025m 3 / min, stirring the reaction for 6h, so that the Fe in the solution +3 Ions completely form goethite precipitates;

[0036] b. Recycling goethite through filtration and washing;

[0037] c, adding sulfuric acid to the copper-containing and zinc-containing filtrate after the goethite is adjusted to pH=3;

[0038] d. Through the D-405 resin column, carry out Cu and Zn adsorption for 1 hour;

[0039] e. Wash the D-405 resin after absorbing Cu and Zn with deionized water to remove impurities, and desorb Zn with 0.2mol / L sulfuric acid solution;

[0040] f. Desorb Cu with 1.0mol / L sulfuric acid solution on the D-405 resin after desorbing Zn;

[0041] g. Adjust the desorbed zinc sulfate solution to pH=5.0, heat to evaporate→concentrate→crystallize, heat and evaporate to a density of 1.53g / mL, stop heating, and c...

Embodiment 2

[0044] a. Adjust the acid dipping solution containing Fe, Cu and Zn to pH = 3, then heat to 70°C, and add H under stirring 2 o 2 , H 2 o 2 The amount added is Fe in the solution 3+ Stop adding when the yellow color fades; stir and react for 5.5 hours, so that the Fe in the solution completely forms goethite precipitation;

[0045] b. Recycling goethite through filtration and washing;

[0046] c, adjusting the filtrate containing Cu and Zn after recovering the goethite to pH=3;

[0047] d. Through the D-405 resin column, carry out Cu and Zn adsorption for 1.5 hours;

[0048]e. Wash the D-405 resin after absorbing Cu and Zn with deionized water to remove impurities, and desorb Zn with 0.2mol / L sulfuric acid solution;

[0049] f. The D-405 resin after desorbing zinc is then desorbed Cu with 1.0mol / L sulfuric acid solution;

[0050] g. Adjust the desorbed zinc sulfate solution to pH=5.0, heat to evaporate→concentrate→crystallize, heat and evaporate to a density of 1.55g / mL,...

Embodiment 3

[0053] a. Adjust the acid immersion solution containing Fe, Cu and Zn to pH = 3, then heat it to 70°C, add air under the condition of stirring, and the speed of the air is 0.025m 3 / min, stirring the reaction for 5h, so that the Fe in the solution +3 Ions completely form goethite precipitates;

[0054] b. Recycling goethite through filtration and washing;

[0055] c, adding sulfuric acid to the filtrate containing Cu and Zn after recovering the goethite is adjusted to pH=5;

[0056] d, put into D-405 resin column, carry out Cu, Zn adsorption for 2 hours;

[0057] e. Wash the D-405 resin after absorbing Cu and Zn with deionized water to remove impurities, and desorb zinc with 0.2mol / L sulfuric acid solution;

[0058] f. Desorb Cu with 1.0mol / L sulfuric acid solution on the D-405 resin after desorbing Zn;

[0059] g. Adjust the desorbed zinc sulfate solution to pH=5.0, heat to evaporate→concentrate→crystallize, heat and evaporate to a density of 1.54g / mL, stop heating, and c...

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Abstract

The invention relates to a method for recovering Cu, Zn and Fe from sulphide ore calcine pickle liquor containing Au and Ag. The method comprises the following steps of: adding sulfuric acid to pickle liquor containing Fe, Cu and Zn to regulate the pH value; adding an oxidant in the presence of stirring to ensure that Fe in the solution forms into a goethite precipitate; filtering and washing to recover the goethite and then regulating the pH value; adsorbing Cu and Zn through a resin column; washing off impurities by using water and desorbing Cu and Zn by using a sulfuric acid solution; and heating, evaporating, concentrating and crystallizing a desorbed copper sulfate solution or a zinc sulfate solution to obtain copper sulfate or zinc sulfate. In the method, Fe, Cu and Zn contained in the sulphide ore calcine pickle liquor are comprehensively recovered by adopting a resin method, and the recovery rate of the Fe, Cu or Zn reaches higher than 95 percent. The method has low recovery cost, simple process and small pollution.

Description

Technical field: [0001] The invention relates to a method for comprehensively recovering polymetallics from gold concentrates, in particular to a method for recovering nonferrous metals from calcine acid leaching liquids containing Au and Ag sulfide ores. Background technique: [0002] At present, most refractory gold ores are pretreated by oxidation roasting and chlorination roasting. The obtained calcined sand is mainly polymetallic oxides, of which Cu has been partially recovered, and other metals such as Fe and Zn are discarded, resulting in waste of resources. waste. The main process for the recovery of Cu is the extraction method, which has the advantages of simple equipment, easy operation, and good separation effect; the disadvantage is that the use of highly volatile organic solvents has certain toxicity and will cause environmental pollution. Expensive and expensive to produce. [0003] CN86105982 discloses a method of "low-temperature sulfidation roasting-recove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/00C22B15/00C22B3/24C01G49/02
CPCY02P10/20
Inventor 李滦宁陈民有崔玉果
Owner JILIN UNIV
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