Method for extracting indium from lead copper matte

A technology of lead matte and ferrous sulfate, which is applied in the field of extracting indium from lead matte, can solve the problems of low yield, high cost, and large consumption of reagents, so as to improve the recovery rate of indium, facilitate industrialization, and improve the production efficiency of indium. The effect of leaching rate

Active Publication Date: 2017-08-11
昆明寰世科技开发有限公司
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Problems solved by technology

[0006] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method for extracting indium from lead matte, aiming to solve the problems of low yield, large reagent consumption and high cost in the existing indium extraction method

Method used

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  • Method for extracting indium from lead copper matte

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Effect test

Embodiment 1

[0048] like figure 1As shown, weigh 1000g of lead matte, and the amount of ferrous sulfate heptahydrate added is 100% of the mass ratio of lead matte, that is, ferrous sulfate heptahydrate is also 1000g, mixed with a roller mill for 60min, and placed in a tube furnace Low-temperature heating and roasting with oxygen flow, the thickness of the material layer is controlled to 10mm, the roasting temperature is 600°C, and the roasting time is 2h; the obtained roasted product is leached with 20% (mass percentage, the same below) dilute sulfuric acid, the leaching time is 4h, and the leaching temperature is 95°C , to obtain the leaching solution and leaching residue; for the leaching solution, extract indium under ultrasonic radiation, the extraction agent is P204, the ratio (OA) is 1:1, the irradiation time is 5min, the extraction stage is 2, and then the organic phase and the aqueous phase are extracted. Separation, the loaded organic phase was back-extracted with 6mol / L hydrochlo...

Embodiment 2

[0050] like figure 1 As shown, take 1000g of lead matte, and the amount of ferrous sulfate heptahydrate added is 80% of the mass ratio of lead matte, that is, 800g of ferrous sulfate heptahydrate, mixed with a roller mill for 60min, and placed in a tube furnace. Oxygen-enriched low-temperature heating and roasting, the thickness of the material layer is controlled to 10mm, the roasting temperature is 550°C, and the roasting time is 1h; the obtained roasted product is leached with 30% dilute sulfuric acid, the leaching time is 3h, the leaching temperature is 70°C, and the leachate and leaching residue are obtained; For the leaching solution, extract indium under ultrasonic radiation, the extraction agent is P204, the ratio (OA) is 1:1, the radiation time is 6min, the extraction stage is 2, and then the organic phase and the aqueous phase are separated, and the organic phase is loaded with 6mol / L hydrochloric acid back extraction, the phase ratio (OA) is 10:1, and the number of...

Embodiment 3

[0052] like figure 1 As shown, take lead matte 1000g, the addition of ferrous sulfate heptahydrate is 60% of the mass ratio of lead matte, that is, ferrous sulfate heptahydrate is 600g, use a roller ball mill to mix and grind for 60min, and place it in a tube furnace Low-temperature heating and roasting with pure oxygen, the thickness of the material layer is controlled to 10mm, the roasting temperature is 650°C, and the roasting time is 1.5h; the obtained roasted product is leached with 50% dilute sulfuric acid, the leaching time is 3h, the leaching temperature is 85°C, and the leachate and leaching residue are obtained ; For the leachate, extract indium under ultrasonic radiation, the extraction agent is P507, the ratio (OA) is 1:1, the radiation time is 4min, the extraction stage is 2, and then the organic phase and the aqueous phase are separated, and the organic phase is loaded using Back extraction with 6mol / L hydrochloric acid, the phase ratio (OA) is 10:1, and the numb...

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Abstract

The invention discloses a method for extracting indium from lead copper matte. The method comprises the following steps that A, the lead copper matte and ferrous sulfate are mixed and ground, and the mass ratio of the lead copper matte to the ferrous sulfate is (0.1-1.5):1 according to the mass ratio; B, the mixed and ground materials are put into a tube furnace to be subjected to oxidizing roasting through oxygen containing gas, and roasting matter is obtained; C, the roasting matter is leached through dilute sulphuric acid, then filtering and washing are carried out, and leaching residues and lixivium are obtained; D, the lixivium is subjected to indium extraction under ultrasonic radiation, and copper containing extraction liquid and indium-enriched liquid are obtained; and E, metal replacement is adopted by the indium-enriched liquid under ultrasonic radiation to obtain sponge indium. According to the method, the leaching rate and the recovery rate of the indium are increased; meanwhile, ultrasonic waves are introduced in the extraction process, and the emulsification problem of the indium in the extraction process is eliminated; the ultrasonic waves are introduced in the indium metal replacement process, the replacement effect is improved, and the replacement time is shortened; and the whole-process technology is simple, industrialization can be achieved easily, and good industrial application prospects are achieved.

Description

technical field [0001] The invention relates to the field of rare metal smelting, in particular to a method for extracting indium from lead matte. Background technique [0002] Indium is a kind of scattered element with great industrial mining value. There is no independent deposit in the earth's crust, and it is mostly associated with lead, zinc and other non-ferrous metals and iron and other minerals, and its content is extremely low and widely distributed. The world's indium production 90% is recovered from the by-products of lead and zinc smelting plants, and indium is mainly recovered from slag, anode slime, smoke, etc. as a by-product of smelting lead and zinc. It is mainly used in electronic components, liquid crystal display screens, low melting point alloys, additives in fine chemicals, and atomic energy. China's indium industry developed rapidly in the 1970s. At present, China's indium resources and indium production volume are the highest in the world, and the ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B1/02C22B7/00
CPCC22B1/02C22B7/007C22B58/00Y02P10/20
Inventor 刘大方范兴祥史谊峰杨美彦李国旺华宏全王家和
Owner 昆明寰世科技开发有限公司
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