Method of preparing tribasic lead sulphate using lead mud in waste lead battery

A tribasic lead sulfate and waste lead storage battery technology, applied in lead sulfate, chemical instruments and methods, lead compounds, etc., can solve the problems of waste of resources, energy, long process flow, environmental pollution, etc., and achieve energy saving and simplification. Process, the effect of eliminating pollution

Inactive Publication Date: 2006-09-13
HUNAN UNIV
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Problems solved by technology

[0012] The technical problem to be solved in the present invention is to overcome the defects of producing lead ingots from lead mud or other raw materials in the pr

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  • Method of preparing tribasic lead sulphate using lead mud in waste lead battery

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Embodiment 1

[0030] Embodiment 1. With reference to figure 1

[0031] The first step is the preparation and purification of lead carbonate. 43g of 96% soda ash is heated and dissolved at 30-50°C, and prepared into 30% Na 2 CO 3 Solution, under stirring at 120r / min, slowly add 100g of lead sludge, stir for 60min, keep the reaction temperature at about 30°C, filter after the reaction is completed, wash the filter residue with water to obtain pure PbCO 3 The solid (slag A) was about 60 g. At the same time, the filtrate (liquid A) was obtained.

[0032] The second step, the preparation of lead nitrate solution, under the condition of normal temperature and normal pressure, 60g PbCO 3 Solid with 120g 30% HNO 3 Solution reaction, stirring speed is 80r / min, filter after 90min reaction, obtain relatively pure Pb(NO 3 ) 2 solution (solution B).

[0033] The third step, the preparation and purification of lead sulfate, the lead nitrate solution obtained above was reacted with 44g 50% sulfuri...

Embodiment 2

[0037] Embodiment 2. by the method and step described in embodiment 1, lead slime amount is still 100g, only the concentration of adjusting the 4th step NaOH solution is 15%, and add-on is 96g, and the reaction times is 40min, obtains tribasic sulfuric acid equally The lead qualified product is about 55g, and the PbO content of the product is 89.5%.

Embodiment 3

[0038] Embodiment 3. adopt the method and step identical with embodiment 2, carry out enlarged experiment, disposable utilization 2000g lead mud, other chemicals are added by the same concentration of embodiment 2 and the amount of corresponding ratio, produce tribasic lead sulfate The qualified product is about 1102g, and the PbO content of the product is 89.9%.

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Abstract

A process for preparing lead trihydroxy sulfate from the lead mud of used lead accumulator includes such steps as reaction between said lead mud and sodium carbonate, desulfurizing to obtain lead carbonate, filtering, decoloring the filtrate, evaporating, crystallizing to obtain sodium sulfate as by-product, dissolving the filtered dregs in nitric acid, reacting on sulfuric acid to obtain the deposit of pure lead sulfate, reacting on sodium hydroxide to obtain lead trihydroxy sulfate, filtering, drying and pulverizing.

Description

technical field [0001] The invention relates to a method for preparing tribasic lead sulfate. Background technique [0002] As the main metal raw material, lead is widely used in all aspects of the national economy. China is the country with the fastest growth in lead production and consumption since the 1990s, but the increase is almost all primary lead, while the growth rate of secondary lead production is relatively slow. The security of lead resources has become an urgent consideration and solve the problem. The development of secondary lead industry can make full use of lead waste, reduce the amount of primary lead ore mining, and reduce the pollution of lead waste to the environment and the waste of resources, so that lead metal can enter a virtuous cycle of production-consumption-regeneration. It is an indispensable and important part of the sustainable development strategy and the development of circular economy. [0003] The main component of lead sludge in waste...

Claims

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Application Information

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IPC IPC(8): C01G21/00C01G21/20
Inventor 张盼月曾光明蒋剑虹王东升
Owner HUNAN UNIV
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