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Method for preparing lead carbonate from lead oxide waste

A lead oxide and lead carbonate technology is applied to the recovery of lead oxide-containing waste and the recovery of lead oxide waste, and can solve the problems of low purity of production products, low economic value of by-products, and high recovery costs.

Inactive Publication Date: 2018-03-09
北京绿色引领环保科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention aims to overcome the technical defects in the prior art, aiming at the problems of high recovery cost of lead oxide waste, low economic value of by-products, low purity of produced products, etc., a method for preparing lead carbonate from lead oxide waste is proposed

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  • Method for preparing lead carbonate from lead oxide waste

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Embodiment 1

[0056] Take lead oxide waste from Zhejiang Chaowei Battery Factory. The lead oxide waste was put into a muffle furnace and roasted at 600°C for 0.5h. The roasted lead paste whose main component is lead oxide after roasting is obtained, which is mainly 95% lead oxide (PbO) according to chemical determination, and the remaining amount is 3% lead sulfate and 2% clay. After processing as follows, the specific steps are:

[0057] (1) Vulcanization process: Add 1.00kg of roasted lead oxide waste into a 10L vulcanization reactor, add 6L of a composite solution of 5.0mol / L sulfuric acid+1.0mol / L acetic acid into the reactor, and control the reaction temperature at 70°C. The stirring rate was 300r / min, and the solid-liquid separation was carried out after continuous stirring for 3.0h to obtain 1.33kg of crude lead sulfate after acidification conversion and the mother liquor of compound acid. PbSO 4 The crude product was analyzed, wherein PbSO 4 The content is 99.5%, and the rest is...

Embodiment 2

[0062]The waste valve-regulated sealed lead-acid batteries with commercially available specifications of 12V and 7Ah were crushed and separated by conventional methods to obtain lead paste. The separated lead paste was put into a muffle furnace and baked at 600° C. for 1 h. A roasted lead paste whose main components are lead oxide and lead sulfate after roasting is obtained. The converted lead paste is analyzed by traditional chemical titration to obtain 40.2% of lead sulfate, 59.4% of lead oxide and 0.4% of other impurities.

[0063] Proceed as follows, the specific steps are:

[0064] (1) Vulcanization process: Add 1.00kg of pretreated converted lead paste into a 10L vulcanization reaction kettle, add 6L of a composite solution of 3.0mol / L sulfuric acid + 1.0mol / L acetic acid into the vulcanization reaction kettle, and control the reaction temperature at 80°C , the stirring speed is 300r / min, after continuous stirring for 3.0h, the solid-liquid separation is carried out, a...

Embodiment 3

[0069] Take lead oxide waste from Zhejiang Huitong Power Supply Company. The lead oxide waste was put into a muffle furnace and roasted at 600°C for 0.5h. The calcined lead paste whose main components are lead oxide and lead sulfate after roasting is obtained, which is mainly 95% lead oxide (PbO) according to chemical determination, and the remainder is lead sulfate and clay.

[0070] The recovery concrete steps of this lead oxide waste material are:

[0071] (1) Vulcanization process: Add 1.00kg of roasted lead oxide waste into a 10L vulcanization reactor, add 6L of a composite solution of 5.0mol / L sulfuric acid+1.0mol / L acetic acid into the reactor, and control the reaction temperature at 70°C. The stirring rate was 300r / min, and the solid-liquid separation was carried out after continuous stirring for 3.0h to obtain 1.33kg of crude lead sulfate after acidification conversion and the mother liquor of compound acid. PbSO 4 The crude product was analyzed, wherein PbSO 4 Th...

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Abstract

The invention discloses a method for preparing lead carbonate from lead oxide waste and belongs to the field of recycling waste containing lead oxide. The method comprises the following steps: (1) utilizing a sulfuric acid composite solution to convert lead oxide waste into a lead sulfate crude product; (2) dissolving the lead sulfate crude product in the step (1) by an X-Y conjugate solution to dissolve lead sulfate in the crude product and filtering to obtain lead sulfate filtrate and insoluble impurities; (3) adding carbon containing matter into the lead sulfate filtrate obtained in the step (2) and separating to obtain the lead carbonate. The method disclosed by the invention can be widely applied to varieties of sources such as waste lead-acid cell lead plaster, waste generated in lead-acid cell production and lead containing waste in a smelting process and has the advantages of high lead recovery rate, cyclic utilization of a mother solution and the like.

Description

technical field [0001] The invention relates to recovery of lead oxide waste and a preparation method of lead carbonate, belonging to the field of recovery of lead oxide-containing waste. Background technique [0002] In recent years, with China's industrialization and urbanization process, my country's lead industry has developed rapidly, gradually occupying an important position in the global lead industry chain. In 2003, my country overtook the United States to become the world's largest producer of refined lead. In contrast, due to environmental pollution in the production process of refined lead in Western countries, the output of refined lead has declined year by year. In 2004, my country surpassed the United States to become the world's largest lead consumer. According to the data released by the International Lead and Zinc Research Group, in 2011, the global output of refined lead was 10.372 million tons, and the consumption was 10.216 million tons; the output of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/00C22B1/02C01G21/14
CPCC01G21/14C22B1/02C22B7/007C22B13/045Y02P10/20
Inventor 潘军青王世永孙艳芝赵旭辉
Owner 北京绿色引领环保科技研究院有限公司
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