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Method for preparing sponge indium with indium-rich slag produced in lead-zinc smelting process

A smelting process and technology of sponge indium, which is applied in the field of non-ferrous metal hydrometallurgy, can solve the problems of low indium recovery rate, low production cost, long process flow, etc., and achieves low energy consumption and cost, low environmental pollution, and reasonable process configuration. Effect

Active Publication Date: 2012-07-18
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for producing sponge indium from the indium-rich slag produced in the lead-zinc smelting process, aiming at many problems such as low indium recovery rate and long process flow in the existing conventional technology. Strong adaptability, high indium recovery rate, low energy consumption, low pollution, low production cost, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for producing sponge indium from indium-rich slag produced in the lead-zinc smelting process. The indium-rich slag used is the indium-enriched slag obtained by fuming and volatilizing the flue dust of the lead blast furnace. Its composition (wt%): In 0.76, Zn 25.46, Pb 15.71, Fe 1.89, As 2.94, Sb 1.19, SiO 2 7.85, Sn0.12, Cu0.2, Ag0.001.

[0025] Weigh 500g of indium-rich slag raw material, add industrial concentrated sulfuric acid (containing H 2 SO 4 98%) is 1.5 times the theoretical consumption (265.6mL) (398.4mL), stir well in the enamel reaction kettle (pay attention to ventilation and micro-negative pressure operation during the process), and then put the wet material into the set temperature at Mature in an oven at 75-85°C for 6 hours, and after completion, crush the cured material to a particle size of less than 40-60 mesh, and use H 2 SO 4 50g / L solution (or water) is stirred and leached once, the liquid-solid volume mass ratio is 5:1, the reacti...

Embodiment 2

[0027] A method for producing sponge indium from indium-rich slag produced in the lead-zinc smelting process. The indium-rich slag used is the product of lead electrolytic reverberatory furnace scum enriched indium by fuming. The specific composition (wt%): In 12.76, Zn 5.46, Pb 21.71, Fe 0.69, As 1.24, Sb 2.06, SiO 2 3.27, Sn0.1, Cu0.4, Ag0.002.

[0028] Weigh 1000g of indium-rich slag raw material, add industrial concentrated sulfuric acid (containing H 2 SO 498%) is 1.5 times the theoretical consumption (637.8mL) (956.7mL), stir evenly in the enamel reaction kettle (pay attention to ventilation and micro-negative pressure operation during the process), and then put the wet material into the set temperature at Mature in an oven at 80-85°C for 5 hours, then crush the matured material, and perform a stirring and leaching with an aqueous solution, the volume-to-solid ratio of liquid to solid is 5:1, the reaction temperature is 75-80°C, and the reaction time is 3 hours. Liqu...

Embodiment 3

[0030] A method for preparing sponge indium from indium-rich slag produced in the lead-zinc smelting process. The indium-rich slag used is indium-enriched slag after fuming of antimony blast furnace slag, and its composition (wt%): In 0.36, Zn 1.38, Pb 10.75, Fe 0.46, As 0.26, Sb 27.8, SiO 2 2.63, Sn0.09, Cu0.3, Ag0.003.

[0031] Weigh 300g of indium-rich slag raw material, add industrial concentrated sulfuric acid (containing H 2 SO 4 98%) is 1.5 times (209.8mL) of the theoretical consumption (139.9mL), stir evenly in the enamel reaction kettle (pay attention to ventilation and micro-negative pressure operation during the process), and then put the mixture into the set temperature at Curing in an oven at 85-90°C for 8 hours, and crushing the cured material, using H 2 SO 4 The 80g / L solution is stirred and leached once, the liquid-solid volume mass ratio is 6:1, the reaction temperature is 85°C, the reaction time is 6h, and the liquid-solid separation is carried out afte...

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Abstract

The invention relates to a method for preparing sponge indium with indium-rich slag produced in a lead-zinc smelting process and belongs to the technical field of hydrometallurgy of non-ferrous metals. The method comprises the processing steps as follows: curing and leaching the indium-rich slag, performing secondary high-temperature acid leaching on filtered slag which is cured again, removing impurities in indium-rich liquid, and displacing the sponge indium; and after the displacement, the liquid is recovered and then is used for producing white vitriol or zinc oxide products. The method has the advantages that the process flow is short, the suitability of the raw material is strong, the recovery rate of indium is high, and the energy consumption, the pollution and the production cost are low.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal hydrometallurgy, and in particular relates to a method for preparing sponge indium from indium-rich slag produced in the lead-zinc smelting process. Background technique [0002] Indium is a rare element. Indium is mainly used in: ITO targets, information materials, high-temperature superconducting materials, special solders for integrated circuits, high-performance alloys, and many high-tech fields such as optoelectronics, energy, aviation, nuclear industry, pharmaceuticals, and chemicals. , high value-added products. The content of indium in the earth's crust is very small. Since it cannot be independently ore-formed, most of it exists in the sulfide minerals of lead, zinc, tin and copper in an associated and scattered form, and can only be obtained from the accompanying by-products of lead-zinc smelting or smoke. to recycle. The lead-zinc smelting by-products or dust generally contai...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B3/08C22B3/46C22B58/00
CPCY02P10/20
Inventor 李栋杨跃新柴承平
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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