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Method for recovering indium from indium-contained soot

A technology for soot and leaching solution is applied in the field of recovering indium from indium-containing soot, which can solve the problems of low indium recovery rate, waste, and indium loss, and achieve the effects of low utilization rate, improved leaching rate, and avoidance of loss and waste.

Inactive Publication Date: 2017-02-08
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-contained soot

Examples

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Embodiment 1

[0042] The method for recovering indium from indium-containing soot of the present embodiment comprises the following steps:

[0043] Step 1, uniformly mix indium-containing soot and concentrated sulfuric acid and perform solid acidification and roasting. During the roasting process, the material-acid ratio is 1:2, the temperature is 300 ° C, and the time is 2 hours;

[0044] Step 2, leaching the calcined sand produced by solid acidification 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 5:1 Then the leachate is separated from the leach residue;

[0045] Step 3, purify the leaching solution obtained in step 2 with sodium sulfide. When purifying by sodium sulfide, add enough sodium sulfide to control the acidity of the leaching solution to be 110g / L, and the temperature is 60°C. Fully stir during the purification process, and Separati...

Embodiment 2

[0051] The method for recovering indium from indium-containing soot of the present embodiment comprises the following steps:

[0052] Step 1: Mix the indium-containing soot and concentrated sulfuric acid evenly and perform solid acidification roasting. During the roasting process, the material-acid ratio is 0.5:2, the temperature is 250°C, and the time is 1.5h;

[0053] Step 2, leaching the calcine produced by solid acidification roasting, the calcine leaching process is: add water to the calcine, stir in a water bath at 90 ° C for 1 h, wherein the liquid-solid ratio of water to calcine is (4: 1. 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 temperature is 65°C. Fully stir during the purification process, and put Separation of purification liquid and purification slag;

...

Embodiment 3

[0060] The method for recovering indium from indium-containing soot of the present embodiment comprises the following steps:

[0061] Step 1: Mix the indium-containing soot and concentrated sulfuric acid evenly and perform solid acidification roasting. During the roasting process, the material-acid ratio is 1.5:2, the temperature is 280°C, and the time is 1.5h;

[0062] Step 2, leaching the calcined sand produced by solid acidification roasting, the calcined sand is leached as follows: add water to the calcined sand, stir in a water bath at 60°C for 1.5h, wherein the liquid-solid ratio of water to the calcined sand is 4.5: 1. Separate the leaching solution from the leaching 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 the temperature is 70°C. Fully stir during the purification process, and Separa...

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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-contained soot. The method includes the following steps that (1) the indium-contained soot and solid acid are evenly mixed to be subject to solid acidification roasting, in the roasting process, the material-acid ratio is 0.5-1:2, the temperature ranges from 200 DEG C to 300 DEG C, and the time ranges from 1 h to 2 h; (2) calcining produced by solid acidification roasting is leached, and a leaching agent and leaching slag are separated; (3) the leaching agent obtained in the step (2) is purified, and purification liquid and purification slag are separated; (4) purification liquid obtained in the step (3) is extracted, and extract liquor and a loaded organic phase are obtained; (5) the loaded organic phase obtained in the step (4) is eluted, and then reverse extraction is carried out to obtain reverse extract liquor; and (6) the reverse extract liquor obtained in the step (5) is subject to replacement, and the elementary substance indium is obtained. According to the method, the rate of recovering the indium from the indium-contained soot is high, and losses and waste of the indium are avoided.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of chemical technology, in particular to a method 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 method for recovering indium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B58/00
CPCC22B7/006C22B7/02C22B58/00Y02P10/20
Inventor 李林波方钊刘佰龙李路路
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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