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Lead-containing solid waste treatment method and preparation method and application of lead dioxide powder

A treatment method, lead dioxide technology, applied in the direction of lead dioxide, lead oxide, ozone preparation, etc., can solve the problems of secondary pollution by by-products, low value of recycled products, difficult to recycle industrial chains, etc., and achieve high lead recovery rate , easy to recycle the effect of recycling

Active Publication Date: 2021-08-20
湖北华德莱节能减排科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional pyrometallurgy lead recovery technology, wet lead recovery is regarded as an environmentally friendly lead recovery technology due to its mild reaction conditions, less pollutant emissions, and high lead recovery rate. In the application process, there are still key problems such as high cost and low return, and secondary pollution caused by by-products, which has become a constraint for its large-scale application in the lead recovery industry.
At the same time, except for waste lead-acid batteries, it is more difficult to establish an effective recycling industrial chain for other types of lead-containing solid waste due to factors such as difficulty in recycling and low value of recycled products.

Method used

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  • Lead-containing solid waste treatment method and preparation method and application of lead dioxide powder
  • Lead-containing solid waste treatment method and preparation method and application of lead dioxide powder
  • Lead-containing solid waste treatment method and preparation method and application of lead dioxide powder

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preparation example Construction

[0053] Based on the same inventive concept, the embodiment of the present application also provides a preparation method of lead dioxide powder, comprising the following steps:

[0054] A1, the trilead tetraoxide prepared by the above-mentioned treatment method is added in acetic acid and / or acetic anhydride, and after the reaction, a solution containing lead tetraacetate is obtained;

[0055] A2, adding the obtained solution containing lead tetraacetate into water, and separating the solid and liquid after hydrolysis to obtain the lead dioxide powder.

[0056] In some embodiments, the lead tetraoxide prepared by the above treatment method is added to acetic acid and / or acetic anhydride, and reacted at 55-65° C. to obtain a solution containing lead tetraacetate, and lead tetraoxide and acetic acid and / or the mass volume ratio of acetic anhydride is (1-40) g:100ml; specifically, the volume ratio of the added acetic acid and acetic anhydride is (70:30)-(100:0).

[0057] It sho...

Embodiment 1

[0061] The embodiment of the present application provides a kind of preparation method of lead dioxide powder, comprises the following steps:

[0062] S1. Add sulfuric acid and hydrogen peroxide to water to prepare a 500mL mixed solution, wherein the concentration of sulfuric acid is 1.6mol / L, and the concentration of hydrogen peroxide is 0.4mol / L;

[0063] S2. Add 100 g of the lead paste obtained from the waste lead-acid battery to the mixed solution in S1, stir and leach for 1 hour, and separate the solid and liquid to obtain the first solid phase;

[0064] S3, adding the first solid phase to 600 mL of ammonium carbonate solution with a concentration of 1 mol / L, stirring and leaching for 1.5 h, and obtaining the second solid phase after solid-liquid separation;

[0065] S4. Add the second solid phase to 500 mL of a 1.6 mol / L methanesulfonic acid solution, react at 30° C., and separate the solid and liquid to obtain a liquid phase lead methanesulfonate solution;

[0066] S5,...

Embodiment 2

[0070] The preparation method of the lead dioxide powder that the embodiment of the present application provides, with embodiment 1, it also comprises:

[0071] In step S2, solid-liquid separation obtains the first solid phase, and simultaneously obtains the first liquid phase containing sulfuric acid and hydrogen peroxide, then adds 40 g of concentrated sulfuric acid and 20 g of hydrogen peroxide solution with a mass fraction of 27.5% to the first liquid phase, and then Reuse for the next leaching process of lead-containing solid waste;

[0072] In step S3, while the second solid phase is obtained by solid-liquid separation, a second liquid phase containing ammonium sulfate is also obtained, and the second liquid phase is rotary evaporated at 60° C. for 1 h, and the final solid phase ammonium sulfate obtained is sold as a product, and the evaporated Ammonia and carbon dioxide are captured and reused;

[0073] The electrolytic solution after electrolysis in step S5 can also b...

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Abstract

The invention provides a lead-containing solid waste treatment method and a preparation method and application of lead dioxide powder. The lead-containing solid waste treatment method comprises the following steps: mixing a sulfuric acid solution and a hydrogen peroxide solution to obtain a mixed solution; adding lead-containing solid waste into the mixed solution, reacting, and separating to obtain a first solid phase; adding the first solid phase into a carbonate solution, reacting, and separating to obtain a second solid phase; adding the second solid phase into a methanesulfonic acid solution, and reacting to obtain a lead methanesulfonate solution; and carrying out electrodeposition reaction by taking a lead methanesulfonate solution as electrolyte to obtain lead dioxide powder at an anode, and carrying out heat treatment on the lead dioxide powder to obtain lead tetraoxide. According to the lead-containing solid waste treatment method, the leaching combination of the sulfuric acid, the hydrogen peroxide, the carbonate and the methanesulfonic acid is utilized, each component in the combination can be regenerated or converted into a valuable by-product through a simple follow-up process after being leached, meanwhile, pollution is hardly generated, and meanwhile the high additional value is generated.

Description

technical field [0001] The invention relates to the technical field of lead-containing solid waste recovery, in particular to a method for treating lead-containing solid waste, a preparation method and application of lead dioxide powder. Background technique [0002] Lead-containing solid waste (waste lead-acid batteries, lead-containing slag, lead-containing glass, lead-containing sludge, lead-containing waste incineration fly ash, etc.) is usually regarded as hazardous waste due to the lead element it contains. With the continuous advancement of my country's ecological civilization construction, the demand for proper recycling and resource utilization of this kind of lead-containing solid waste (hazardous waste) is becoming increasingly urgent, and the research and development of more advanced recycling technologies is also imminent. [0003] The existing lead-containing solid waste recycling technologies can be roughly divided into two categories: pyrotechnic method and w...

Claims

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Application Information

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IPC IPC(8): C01G21/08C01B13/11C22B3/00C22B7/00C25B1/00B82Y30/00B82Y40/00
CPCC01G21/08C01B13/11C22B7/007C22B13/045C25B1/00B82Y30/00B82Y40/00C01P2004/64C01P2002/72C01P2002/85C01P2004/03C01P2004/04Y02P10/20
Inventor 吴旭袁笃吴怀德刘号
Owner 湖北华德莱节能减排科技有限公司
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