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Method for preparing sponge indium from indium slag

A sponge indium and indium-rich technology, which is applied in the field of preparing indium sponge from indium-rich slag, can solve the problems of serious environmental pollution, low metal recovery rate, and large reagent consumption, and achieve high metal recovery rate, simple process, and small environmental pollution Effect

Inactive Publication Date: 2005-04-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has the disadvantages of long process flow, low metal recovery (generally 30-60%), serious environmental pollution, and large consumption of reagents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The chemical composition of the indium-rich slag is: In 8.29% Zn 18.17% Pb 20.14% Fe 49.17%, in addition, there are small amounts of Sb, Ag, Sn, Cu, As. Crush in a ball mill to make the particle size less than 40 mesh, weigh 0.5Kg of the material, add H 2 SO 4 3L of 30g / L solution was stirred and leached for 6 hours at 70-80°C, the pH of the solution was adjusted to 5.4, and then the liquid-solid separation of the ore slurry was carried out. Obtain leaching slag weight 0.15Kg, add H 2 SO 4 1L of 150g / L solution, stirred and leached for 8 hours at 80-90°C, adjusted the pH of the solution to 1.5, and then carried out liquid-solid separation of ore slurry, and added zinc powder to the obtained solution at 20-25°C, the addition amount was The theoretical amount is 1.2 times, and the replacement is carried out for 3 days, and the indium content of the obtained sponge indium is 98%.

Embodiment 2

[0021] The chemical composition of indium-rich slag is: In 6.70% Zn 30.54% Pb 18.16% Fe 32.01%, in addition, there are small amounts of Sb, Ag, Sn, Cu, As. Crush in a ball mill to make the particle size less than 40 mesh, weigh 1Kg of the material, add H 2 SO 4 5L of 30g / L solution was stirred and leached for 6 hours at 60-70°C, the pH of the solution was adjusted to 5.4, and then the liquid-solid separation of the ore slurry was carried out. Obtain leaching slag weight 0.30Kg, add H 2 SO 4 3L of 150g / L solution was stirred and leached at 80-90°C for 8 hours, and the pH of the solution was adjusted to 1.5, and then the liquid-solid separation of the ore slurry was carried out. Add zinc powder to the obtained solution at 25-30°C, the amount added is 1.5 times of the theoretical amount, and the replacement is carried out for 4 days, and the obtained indium sponge contains 85% indium.

Embodiment 3

[0023] The chemical composition of indium-rich slag is: In 10.19% Zn 10.54% Pb 35.73% Fe 43.60%, in addition, there are a small amount of Sb, Ag, Sn, Cu, As. Crushing in a ball mill to make the particle size less than 40 mesh, weighing 300Kg of the material, adding H 2 SO 4 2 cubic meters of 30g / L solution, stirred and leached for 6 hours at 70-80°C, adjusted the pH of the solution to 5.4, and then carried out liquid-solid separation of ore slurry. The obtained leaching slag weighs 100Kg, add H 2 SO 4 1 cubic meter of 150g / L solution was stirred and leached for 8 hours at 80-90°C, the pH of the solution was adjusted to 1.5, and then the liquid-solid separation of the ore slurry was carried out. Add zinc powder to the obtained solution at 25°C, the amount added is 1.5 times of the theoretical amount, and the replacement is carried out for 4 days, and the obtained indium sponge contains 93% indium.

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PUM

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Abstract

The invention discloses a kind richly to contain the indium dregs preparation sponge indium the method, this invention realized through the following technical plan: Will contain the indium quantity will be 4%~14% rich indium dregs, will carry on the leaching with the alkene sulfuric acid to obtain contains the indium is 20~~30% leaching dregs and contains the indium to be smaller than the 50mg / L zinc sulfate liquid, will contain the indium is 20~~30% leaching dregs with the strong sulfuric acid leaching, will obtain contains indium 18~~25mg / L the liquid, again will use the zinc powder replacement indium sulfate liquid, will obtain the sponge indium, in the sponge indium the indium content is 50% to 95%. Uses this invention, the metal indium total returns-ratio high, the environmental pollution is small.

Description

[0001] 1. Technical field: non-ferrous metal metallurgy 2. Background technology: [0002] Metal indium does not have a separate mineral in nature, and it is associated with lead-zinc-tin and copper ore, and the content is very small. The content of indium in metal ores is generally a few ten thousandths. The known production process of metal indium is: in metal smelting In the process, indium enters the smelting slag or intermediate products, and is leached by sulfuric acid, P 204 Extraction, back-extraction with hydrochloric acid and other processes are used for multiple enrichment to obtain a liquid containing 20 to 30 g / L of indium, and then replace the indium-containing liquid with an aluminum plate or a zinc plate to obtain sponge indium, and the sponge indium is subjected to alkali fusion to obtain crude indium. The method has the disadvantages of long process flow, low recovery rate of metals (generally 30-60%), serious environmental pollution, and large consumption of...

Claims

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Application Information

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IPC IPC(8): C22B58/00
Inventor 杨斌刘大春戴永年孔得精唐万启韩龙杜国山陈为亮马文会刘永成杨部正姚耀春代建青辜峰万雯刘媛媛
Owner KUNMING UNIV OF SCI & TECH
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