Method for recovering indium from indium-containing soot

A technology of soot and leaching solution, which is applied in the field of indium recovery from indium-containing soot, can solve the problems of waste, indium loss, and low indium recovery rate, and achieve high recovery rate and avoid loss and waste.

Inactive Publication Date: 2016-12-14
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, the recovery rate of indium in indium-containing soot is not high, resulting in the loss and waste of indium

Method used

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  • Method for recovering indium from indium-containing soot

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Embodiment 1

[0038] The steps of recovering indium from indium-containing soot in this embodiment are as follows:

[0039] Step 1: Add potassium permanganate and sulfuric acid to the indium-containing soot, stir in a water bath at 80°C for 6 hours, wherein the concentration of sulfuric acid is 300g / L, and the liquid-solid ratio of the indium-containing soot is 6:1, and the permanganate The amount of potassium added is 0.6% of the mass of indium-containing soot. During the leaching process, water is added to the reaction system to ensure the stability of the reaction system, and the leaching liquid is separated from the leaching residue;

[0040] Step 2, purify the leachate obtained in step 1 with sodium sulfide, when purifying by sodium sulfide, add enough sodium sulfide, control the acidity of the leachate to be 110g / L, the temperature is 60°C, fully stir during the purification process, and Separation of purification liquid and purification slag;

[0041] Step 3, extract the purified so...

Embodiment 2

[0046] The steps of recovering indium from indium-containing soot in this embodiment are as follows:

[0047] Step 1: Add potassium permanganate and sulfuric acid to the indium-containing soot, stir in a water bath at 50°C for 3 hours, wherein the concentration of sulfuric acid is 200g / L, and the liquid-solid ratio of the indium-containing soot is 5:1, and the permanganate The amount of potassium added is 0.4% of the mass of indium-containing soot. During the leaching process, water is added to the reaction system to ensure the stability of the reaction system, and the leaching liquid is separated from the leaching residue;

[0048] Step 2, purify the leach solution obtained in step 1 with sodium sulfide. When purifying by sodium sulfide, add a sufficient amount of sodium sulfide to control the acidity of the leach solution to 120g / L, and the temperature is 65°C. Fully stir during the purification process, and Separation of purification liquid and purification slag;

[0049] ...

Embodiment 3

[0054] The steps of recovering indium from indium-containing soot in this embodiment are as follows:

[0055] Step 1: Add potassium permanganate and sulfuric acid to the indium-containing soot, stir in a water bath at 60°C for 4 hours, wherein the concentration of sulfuric acid is 250g / L, and the liquid-solid ratio of the indium-containing soot is 3:1, and the permanganate The amount of potassium added is 0.2% of the mass of indium-containing soot. During the leaching process, water is added to the reaction system to ensure the stability of the reaction system, and the leaching liquid is separated from the leaching residue;

[0056] Step 2: Purify the leaching solution obtained in Step 1 with iron powder, add a sufficient amount of iron powder, the temperature is 70°C, fully stir during the purification process, and separate the purification solution from the purification slag;

[0057] Step 3, extract the purified solution obtained in step 2 to obtain the extract and the load...

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Abstract

The invention belongs to the technical field of chemical processes, and particularly relates to a method for recovering indium from indium-containing soot. The method comprises the following steps that step one, the indium-containing soot is leached, and the leaching process comprises the sub-steps that an oxidizing agent and vitriol are added into the indium-containing soot, and stirred for at least 3 hours at the temperature of 50-100 DEG C in a water bath mode, and then leachate is separated from leaching slag, wherein the concentration of the vitriol is 200g / L-400g / L, and the liquid-solid ratio of the vitriol to the indium-containing soot is (3~8):1; step two, the leachate obtained in the step one is purified, and purified liquid is separated from purified slag; step three, the purified liquid obtained in the step two is subjected to extraction, so that extract liquor and loaded organic phases are obtained; step four, the loaded organic phases obtained in the step three are subjected to elution and reverse extraction to obtain strip liquor; and step five, the strip liquor obtained in the step four is subjected to replacement, and the simple substance indium is obtained. According to the method for recovering the indium from the indium-containing soot, the indium recovery rate is high, and indium loss and waste are avoided.

Description

【Technical field】 [0001] The invention belongs to the technical field of non-ferrous metal metallurgy technology, in particular to a method for recovering indium from soot containing indium. 【Background technique】 [0002] Indium is a rare element with very little content and very scattered distribution in the earth's crust. It often coexists with minerals such as lead, zinc, copper and tin with similar properties in nature. In the smelting process of lead, zinc, copper and tin, etc., the soot contains 0.3%-0.6% indium, which is an important raw material for recycling indium. Therefore, the enrichment and extraction process of indium in indium-containing soot is particularly important. But at present, the recovery rate of indium in indium-containing soot is not high, resulting in the loss and waste of indium. 【Content of invention】 [0003] In order to solve the problems in the prior art, the object of the present invention is to provide a method for recovering indium fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B7/02
CPCC22B7/007C22B7/02C22B58/00Y02P10/20
Inventor 方钊李林波刘佰龙李路路
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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