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A kind of processing method of lead cadmium sulfide slag

A technology of lead cadmium sulfide and treatment method, which is applied in the direction of chemical instruments and methods, lead halide, sulfur compounds, etc., can solve the problems of high energy consumption, unfavorable reuse of sulfate, and limited use of cobalt and nickel smelting, and achieve recovery The effect of high efficiency, high product added value and low cost

Active Publication Date: 2019-11-22
常宁市华兴冶化实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The conventional treatment process is to dissolve the sulfide in acid after sulfuration and roasting, and then separate it to recover the metals in it. However, this process has the following problems: sulfur dioxide will be produced by sulfate roasting, which consumes a lot of energy, and the sulfur dioxide obtained by absorbing Sulfite is not very useful for cobalt nickel smelting, which is not conducive to the reuse of sulfite

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  • A kind of processing method of lead cadmium sulfide slag
  • A kind of processing method of lead cadmium sulfide slag
  • A kind of processing method of lead cadmium sulfide slag

Examples

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Embodiment 1

[0039] A processing method for lead cadmium sulfide slag, which comprises the following steps:

[0040] (1) Add lead and cadmium sulfide slag to hydrochloric acid solution to slurry, then put it into a high-pressure reactor, feed sulfur dioxide gas, react at a temperature of 155°C and a pressure of 3 atmospheres for 1.5h, and then cool to 39 ℃ to get the cooling material, and the gas released from the pressure release is absorbed by lye;

[0041] (2) Carbon tetrachloride is added to the cooling material, stirred for 0.8h, and the stirring speed is 195r / min, then stratified, the organic layer of the upper floor is extracted, and then the water phase is poured out, and the organic phase is through distillation under reduced pressure Carbon tetrachloride is recovered and returned to use to obtain elemental sulfur;

[0042] (3) Cool the water phase poured out in step (2) to a temperature of 2° C., and then perform solid-liquid separation to obtain the first filtrate and the first...

Embodiment 2

[0067] A processing method for lead cadmium sulfide slag, which comprises the following steps:

[0068] (1) Add lead and cadmium sulfide slag to hydrochloric acid solution to slurry, then put it into a high-pressure reactor, pass in sulfur dioxide gas, react at a temperature of 145°C and a pressure of 3 atmospheres for 1.5h, and then cool to 39 ℃ to get the cooling material, and the gas released from the pressure release is absorbed by lye;

[0069] (2) Carbon tetrachloride is added to the coolant, stirred for 0.8h, and the stirring speed is 230r / min, then stratified, the upper organic layer is extracted, and then the water phase is poured out, and the organic phase is through distillation under reduced pressure Carbon tetrachloride is recovered and returned to use to obtain elemental sulfur;

[0070] (3) Cool the water phase poured out in step (2) to a temperature of 3° C., and then perform solid-liquid separation to obtain the first filtrate and the first filter residue. Ad...

Embodiment 3

[0095] A processing method for lead cadmium sulfide slag, which comprises the following steps:

[0096] (1) Add lead and cadmium sulfide slag to hydrochloric acid solution to slurry, then put it into a high-pressure reactor, pass in sulfur dioxide gas, react at a temperature of 135°C and a pressure of 3 atmospheres for 1.5h, and then cool to 39°C after releasing the pressure. ℃ to get the cooling material, and the gas released from the pressure release is absorbed by lye;

[0097] (2) Carbon tetrachloride is added to the cooling material, stirred for 0.8h, and the stirring speed is 190r / min, then stratified, the organic layer on the upper floor is extracted, and then the water phase is poured out, and the organic phase is distilled under reduced pressure Carbon tetrachloride is recovered and returned to use to obtain elemental sulfur;

[0098] (3) Cool the water phase poured out in step (2) to a temperature of 3° C., and then perform solid-liquid separation to obtain the firs...

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Abstract

The invention discloses a treatment method for lead cadmium sulfide slag. The leaching reaction of sulfur dioxide under high pressure recovers the sulfide and leaches the sulfide, and uses carbon tetrachloride to dissolve and extract the sulfur obtained. Since the sulfur dissolves into carbon tetrachloride, the sulfur extraction is realized, and then it is subjected to vacuum distillation Recover carbon tetrachloride and sulfur; then after cooling, lead chloride and cuprous chloride are precipitated, and ammonia water is added, and cuprous chloride is dissolved in ammonia water, while lead chloride is insoluble, thus realizing lead chloride Separation from cuprous chloride, and obtaining cuprous chloride by distilling ammonia; then using zinc powder to replace the remaining solution, due to the different activity of the metals, nickel, cobalt and cadmium can be replaced by metal elements. The invention can realize the separation and recovery of all components, has a high recovery rate, and the finally obtained product has high purity, high added value of the product, little impact on the environment and low cost.

Description

technical field [0001] The invention relates to a treatment method for lead cadmium sulfide slag, belonging to the technical field of waste treatment. Background technique [0002] As industrial monosodium glutamate, cobalt nickel is a national strategic resource and is widely used in cemented carbide, functional ceramics, catalysts, military industry, and high-energy batteries. Especially with the development of new energy vehicles, nickel and cobalt, as an important element of lithium-ion batteries for new energy vehicles, are in increasing demand. At present, the production of cobalt and nickel is mainly based on hydrometallurgy. [0003] In the process of hydrometallurgy of nickel and cobalt, iron, aluminum and chromium are generally removed by oxidation precipitation, lead, cadmium, etc. are removed by sulfide, manganese, zinc, etc. are removed by extraction, and nickel, cobalt, and magnesium are removed by extraction. , and then the process of removing lead and cadmiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B3/38C25C1/16C22B17/00C22B23/00C01B17/02C01C1/02C01G3/02C01G21/16
CPCC01B17/0205C01C1/022C01G3/02C01G21/16C22B7/007C22B17/04C22B23/0423C22B23/0469C25C1/16C22B3/3846Y02P10/20
Inventor 郑忆依
Owner 常宁市华兴冶化实业有限责任公司