Ultrafine lead oxide prepared by using waste lead plaster and preparation method thereof

A technology of waste lead paste and lead oxide, applied in the direction of lead oxide, recycling technology, regeneration of useful parts, etc., can solve the problems of inconvenient treatment by fire method and wet method, and achieve good resource recovery effect and low lead-free volatilization , the effect of convenient recycling

Inactive Publication Date: 2013-10-30
湖北金洋冶金股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially the compound NaPb 2 (CO 3 ) 2 The appearance of OH, the introduction of sodium element will bring inconvenience to the subsequent fire treatment or wet treatment

Method used

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  • Ultrafine lead oxide prepared by using waste lead plaster and preparation method thereof
  • Ultrafine lead oxide prepared by using waste lead plaster and preparation method thereof
  • Ultrafine lead oxide prepared by using waste lead plaster and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) The pretreatment before desulfurization is as follows: the lead paste pretreatment before desulfurization is to take out the lead paste of the waste lead-acid battery, wash it to neutral drying, and grind it into waste lead paste powder with a particle size of more than 100 meshes, wherein sulfuric acid The lead content is 64.5%.

[0046] (2) Preparation of the ultrafine lead oxide (PbO / Pb)

[0047] 2.1 Desulfurization conversion

[0048] Add 100g of waste lead plaster to a total of 55g of sodium carbonate and sodium bicarbonate in a composite desulfurization solution in which the molar ratio of sodium carbonate to sodium bicarbonate is 1:2 (wherein the molar ratio of S in the waste lead plaster:Na in the desulfurizer is 1:4) , the solid-to-liquid ratio of the desulfurization solution is 1:10, and the mixed solution is obtained by reacting at 35°C for 2 hours; the desulfurization rate of waste lead plaster is above 98.5%. Obtain desulfurization lead paste, the XRD...

Embodiment 2

[0061] Difference with embodiment 1 is: sodium carbonate and sodium bicarbonate mol ratio are 1: 3, and desulfurization time is 3h, finally obtains light yellow lead powder (PbO / Pb) product, raw material utilization rate 98.3%, the lead citrate Yield 97.5%. Others are the same as in Example 1, and the main process parameters are shown in Table 1.

Embodiment 3

[0063] The difference from Example 1 is that the molar ratio of lead in the desulfurized lead paste to citric acid in the citric acid leaching step is 1:3, the utilization rate of raw materials is 98.5%, and the yield of lead citrate is 97.8%. Others are the same as in Example 1, and the main process parameters are shown in Table 1.

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Abstract

The invention discloses an ultrafine lead oxide prepared by using a waste lead plaster and a preparation method thereof. The preparation method comprises the following steps of: carrying out desulphurization process by mixing the waste lead plaster with an aqueous solution containing a composite desulfurizer for reaction; carrying out filtration to remove the desulphurization filtering solution to obtain the desulfurated lead plaster (filter residue); carrying out a leaching and crystal transformation process by adding a citric acid solution and a reducing agent into the desulfurated lead plaster obtained in the process, and carrying out filtration, washing, and drying to obtain the lead citrate after the desulfurated lead plaster reacts with the citric acid solution; carrying out a roasting process by roasting the lead citrate to obtain the ultrafine lead oxide. According to the preparation method disclosed by the invention, the ultrafine lead oxide is prepared from the waste lead storage lead plaster; a two-step leaching process is adopted; the filtering solution is simple in ingredient and can be recycled; a side product is recycled from the desulphurization solution. The preparation method disclosed by the invention is low in energy consumption, simple in equipment, high in lead recycling rate, and high in ultrafine lead product quality, and has the characteristics of good resource recycling effect, environmentally-friendly and pollution-free production process, and capability of clean production.

Description

technical field [0001] The invention relates to the field of recycling of waste lead-acid batteries, in particular to reclaiming waste lead paste which pollutes the environment from waste lead batteries through wet leaching and low-temperature roasting processes to directly prepare superfine lead powder, which belongs to the technical field of recycled lead production. Background technique [0002] Lead has a wide range of uses, and its annual output ranks fourth among nonferrous metals after aluminum, copper, and zinc. With the increase of the number of automobiles, the lead-acid battery industry has developed rapidly, and the amount of waste lead-acid batteries produced every year is constantly increasing. Lead-acid battery is the battery with the largest output and the widest application among all kinds of batteries in the world, and its lead consumption accounts for 82% of the total lead consumption in the world. In order to save limited mineral resources and avoid envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00H01M6/52C01G21/02
CPCY02E60/12Y02P10/20Y02W30/84
Inventor 杨家宽朱新锋李富元周锋刘建文江姝杨丹妮李磊张伟孙晓娟王琴
Owner 湖北金洋冶金股份有限公司
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