Technique for recovering indium from indium-containing soot

A soot and process technology, which is applied to the technical field of recovering indium from indium-containing soot, can solve the problems of low indium recovery rate, waste, indium loss, etc., and achieve the effects of high recovery rate, improving leaching rate, and avoiding loss and waste.

Inactive Publication Date: 2017-01-18
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-containi

Method used

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  • Technique for recovering indium from indium-containing soot

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Embodiment 1

[0042] The process for recovering indium from indium-containing soot in this embodiment includes the following steps:

[0043] Step 1: Mix the indium-containing soot with concentrated sulfuric acid evenly and perform sulfuric acid curing and roasting. The roasting process is: add 20 mL of concentrated sulfuric acid to 20 g of indium-containing soot to perform sulfuric acid curing and roasting. The sulfuric acid curing and roasting time is 2 hours;

[0044] Step 2, leaching the calcined sand produced by sulfuric acid aging and roasting. The calcined sand is leached as follows: add water to the calcined sand and stir in a water bath at 80°C for 2 hours, wherein the liquid-solid ratio of water to calcined sand is 6:1 , and then separate the leaching solution from the leaching residue;

[0045] Step 3, purify the leach solution obtained in step 2 with sodium sulfide. When purifying by sodium sulfide, add a sufficient amount of sodium sulfide to control the acidity of the leach sol...

Embodiment 2

[0051] The process for recovering indium from indium-containing soot in this embodiment includes the following steps:

[0052] Step 1: Mix the indium-containing soot with concentrated sulfuric acid evenly and perform sulfuric acid curing and roasting. The roasting process is: add 15 mL of concentrated sulfuric acid to 20 g of indium-containing soot to perform sulfuric acid curing and roasting. The sulfuric acid curing and roasting time is 1.5 hours;

[0053] Step 2, leaching the calcined sand produced by sulfuric acid aging and roasting. The calcined sand is leached as follows: add water to the calcined sand, stir in a water bath at 90°C for 1 hour, wherein the liquid-solid ratio of water to calcined sand is 3:1 , and then separate the leaching solution from the leaching residue;

[0054] Step 3, use sodium sulfide to purify the leachate obtained in step 2. When purifying by sodium sulfide, add enough sodium sulfide to control the acidity of the leachate to 130g / L, and the tem...

Embodiment 3

[0060] The process for recovering indium from indium-containing soot in this embodiment includes the following steps:

[0061] Step 1: Mix the indium-containing soot with concentrated sulfuric acid evenly and perform sulfuric acid curing and roasting. The roasting process is: add 10 mL of concentrated sulfuric acid to 20 g of indium-containing soot to perform sulfuric acid curing and roasting. The sulfuric acid curing and roasting time is 1 hour;

[0062] Step 2, leaching the calcined sand produced by sulfuric acid aging and roasting. The calcined sand is leached as follows: add water to the calcined sand, and stir in a water bath at 60°C for 1.5h, wherein the liquid-solid ratio of water to the calcined sand is 8: 1. Separate the leachate from the leach residue;

[0063] Step 3, purify the leach solution obtained in step 2 with sodium sulfide. When purifying by sodium sulfide, add a sufficient amount of sodium sulfide to control the acidity of the leach solution to 150g / L, and...

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Abstract

The invention belongs to the technical field of chemical techniques, and particularly relates to a technique for recovering indium from indium-containing soot. The technique comprises the following steps that firstly, the indium-containing soot is evenly mixed with concentrated sulfuric acid and subjected to sulfuric acid curing roasting, specifically, in the roasting process, 10-20 ml of concentrated sulfuric acid is added into each 20 g of indium-containing soot for sulfuric acid curing roasting, and the sulfuric acid curing roasting time is 1-2 h; secondly, a roasted product obtained through sulfuric acid curing roasting is leached, and leachate and leaching residues are separated; thirdly, the leachate obtained in the second step is purified, and purified liquor and purifying residues are separated; fourthly, the purified liquor obtained in the third step is extracted, so that an extract liquor and a loaded organic phase are obtained; fifthly, the loaded organic phase obtained in the fourth step is eluted, and then reverse extraction is conducted, so that strip liquor is obtained; and sixthly, replacement is conducted on the strip liquor obtained in the fifth step, so that monoplasmatic indium is obtained. According to the technique provided by the invention, the recovery rate of the indium in the indium-containing soot is high, and indium loss and waste are avoided.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of chemical technology, in particular to a technology for recovering indium from soot containing indium. [0003] 【Background technique】 [0004] 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. [0005] 【Content of invention】 [0006] In order to solve the problems in the prior art, the object of the present invention is to provide a process for recovering i...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B58/00
CPCC22B7/007C22B7/02C22B58/00Y02P10/20
Inventor 李林波方钊刘佰龙李路路
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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