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Method for separating and recovering rare and precious metals in chlorination leaching liquid

A technology for chlorination leaching and rare and precious metals, applied in the direction of improving process efficiency, can solve the problems of high cost, low recovery rate, poor separation effect, etc., and achieve the effects of good adaptability, short process and low cost

Active Publication Date: 2016-07-20
JIANGXI COPPER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All the methods described in the above patents have many defects such as lengthy process, poor separation effect, low recovery rate, high cost and difficult follow-up treatment.

Method used

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  • Method for separating and recovering rare and precious metals in chlorination leaching liquid
  • Method for separating and recovering rare and precious metals in chlorination leaching liquid
  • Method for separating and recovering rare and precious metals in chlorination leaching liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Accurately measure 3.00L of chlorinated leaching solution and pour it into an acid-resistant reactor, stir and adjust the solution to acidity, add a sodium sulfite solution with a concentration of 100g / L to the reaction solution at a rate of 50mL / min at room temperature, and monitor with a potentiometer The potential of the reaction solution, when the solution potential reaches

[0017] Stop at 750mV. Solid-liquid separation to obtain gold concentrate and liquid after primary reduction. The volume, composition and precipitation rate of each element of the solution before and after the reaction are shown in Table 1. The gold concentrate was washed with water and hydrochloric acid, dried, and sent to the main metal grade analysis and impurity content analysis. The results are shown in Table 2.

[0018] Table 1 Elemental analysis results before and after primary reduction of chlorinated leachate

[0019]

[0020] Table 2 Analysis results of main metal and impurity con...

Embodiment 2

[0034] Accurately measure 3.00L of chlorinated leaching solution and pour it into an acid-resistant reactor, stir and adjust the solution to acidity, heat to 40°C and feed SO at a flow rate of 40mL / min 2 Gas, and monitor the potential of the reaction solution with a potentiometer, stop when the potential of the solution reaches 690mV, and then separate the solid and liquid to obtain the gold concentrate and the liquid after primary reduction. The volume, composition and element precipitation rate of the solution before and after the reaction are shown in Table 7. The gold concentrate was washed with water and hydrochloric acid, dried, and sent to the main metal grade analysis and impurity content analysis. The results are shown in Table 8.

[0035] Table 7 Elemental analysis results before and after primary reduction of chlorinated leachate

[0036]

[0037]

[0038] Table 8 Analysis results of main metal and impurity content of fine gold ore

[0039]

[0040] Pour t...

Embodiment 3

[0051] Accurately measure 3.00L of chlorinated leaching solution and pour it into an acid-resistant reactor, stir and adjust the solution to acidity, add oxalic acid solid to the reaction solution at a rate of 5g / min at room temperature, and monitor the potential of the reaction solution with a potentiometer. Stop when the solution potential reaches 720mV. Solid-liquid separation to obtain gold concentrate and liquid after primary reduction. The volume, composition and precipitation rate of each element of the solution before and after the reaction are shown in Table 13. The gold concentrate was washed with water and hydrochloric acid, dried, and sent to the main metal grade analysis and impurity content analysis. The results are shown in Table 14.

[0052] Table 13 Elemental analysis results before and after primary reduction of chlorinated leachate

[0053]

[0054] Table 14 Analysis results of main metal and impurity content of fine gold ore

[0055]

[0056] Pour t...

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Abstract

The invention discloses a method for separating and recovering rare and precious metals in chlorination leaching liquid. The chlorination leaching liquid of complex rare and precious metal materials is used as stock solution; a substance containing no heavy metal elements is used as a reducing agent; and the stock solution is selectively reduced through controlling potential to convert the rare and precious metals therein to simple substances step by step for precipitating to form various rare and precious concentrates, so that the rare and precious metals in the stock solution are effectively separated and recovered, selenium tellurium concentrates are obtained, and the purpose of separating and recovering the rare and precious metals in the chlorination leaching liquid is achieved. The method is short in flow, low in cost, easy to operate, high in adaptability, capable of treating various complex chlorination leaching liquid, excellent in separating effect of the rare and precious metals in the chlorination leaching liquid and high in recovery rate.

Description

technical field [0001] The invention belongs to the field of rare and precious metal hydrometallurgy, and specifically relates to a method for separating and recovering rare and precious metals in chlorinated leaching solution, which is a technology for separating and recovering rare and precious metals in solution. Background technique [0002] Chlorination leaching is a solid material treatment process in which the target component is transferred into the solution in the form of soluble chloride through the action of a chlorinating agent. It is often carried out under strong acid conditions, with chlorate, hypochlorite or chlorine gas, etc. It is a chlorinating agent and a certain amount of chloride ions are added. Under acidic conditions, the chlorinating agent has a strong oxidizing ability, and can oxidize most of the elements in the solid into corresponding high-valent cations. According to the different properties of the elements, these high-valent cations are - Exis...

Claims

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Application Information

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IPC IPC(8): C22B3/44C22B11/06C22B7/00
CPCC22B3/44C22B7/007C22B11/04C22B11/048C22B11/06Y02P10/20
Inventor 胡意文王日欧阳辉黄绍勇孙敬韬汪秋雨
Owner JIANGXI COPPER CORP
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