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Lead sulfide cadmium sediment treatment method

A technology of lead cadmium sulfide and treatment method, which is applied in 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. The effect of uniform distribution, high added value and low cost

Active Publication Date: 2018-12-07
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

Method used

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  • Lead sulfide cadmium sediment treatment method
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  • Lead sulfide cadmium sediment treatment method

Examples

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Effect test

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

[0066] A processing method for lead cadmium sulfide slag, which comprises the following steps:

[0067] (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;

[0068] (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;

[0069] (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

[0094] A processing method for lead cadmium sulfide slag, which comprises the following steps:

[0095] (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;

[0096] (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;

[0097] (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 lead sulfide cadmium sediment treatment method. Through the leaching reaction of sulfur dioxide under high pressure, sulfide is recycled and leached; carbon tetrachloride isadopted to dissolve sulfur obtained through extraction; the sulfur is dissolved into the carbon tetrachloride, so that the sulfur is extracted; the carbon tetrachloride and the sulfur are recycled through reduced pressure distillation; through cooling, lead chloride and cuprous chloride are precipitated; ammonium hydroxide is added, cuprous chloride is dissolved into the ammonium hydroxide, and the lead chloride is not dissolved, so that the lead chloride and the cuprous chloride are separated, and the cuprous chloride is obtained through ammonia distillation; and zinc powder is adopted for replacing residual solution, and due to different metal activity, nickel-cobalt-cadmium can be replaced into metal elements. According to the lead sulfide cadmium sediment treatment method provided by the invention, all components can be separated and recycle, so that the recycle rate is high; and the finally obtained product is high in purity, high in added value, less in environmental impact, andlow in 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 Applications(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
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