Method for preparing highly oxidized lead powder from waste battery lead plaster

A waste battery, oxidation degree technology, applied in the direction of lead oxide, battery recycling, recycling technology, etc., can solve the problems of high energy consumption, high cost, not perfect, etc., and achieve simple preparation process operation, mild reaction conditions, and save production cost effect

Active Publication Date: 2013-12-11
YANGZHOU APOLLO BATTERY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyrometallurgy, a relatively mature technology in our country, is currently the main method for the treatment of waste lead paste. This method has a fast chemical reaction, a large processing capacity, and high production efficiency, but it consumes a lot of energy and pollutes the environment. It is not suitable for recycling. Long-term development of the lead industry
Hydrometallurgy is mainly to process waste lead paste through a series of treatments and electrolytic deposition to produce metallic lead. This method has improved the problems of energy consumption and environmental pollution, but it is not perfect enough, and there are problems of low yield and high cost.

Method used

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  • Method for preparing highly oxidized lead powder from waste battery lead plaster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The lead plaster is washed and dried and ground into 200-300 mesh powder. Take 10g of lead plaster powder and place it in a 250ml beaker, add 20g of sulfuric acid solution with a concentration of 20% and 2g of hydrogen peroxide with a concentration of 30%, stir and react at 25°C for 3 hours, filter, and dry the filter cake to obtain 10.7g of lead sulfate. Pour 40g of saturated ammonium carbonate solution into lead sulfate, stir and react at 40°C for 5h, filter, and dry the filter cake to obtain 9.6g of crude lead carbonate. Add concentration 35% acetic acid solution 40g to lead carbonate crude product, filter after fully reacting. Add 7g of sodium carbonate to the filtrate, stir and react evenly and then filter and dry to obtain 8.2g of pure lead carbonate solid. Put the lead carbonate solid in a muffle furnace and bake it at 380°C for 4 hours to get 6.5g of Pb 3 o 4 , commonly known as red lead, calculated based on Pb content, its yield reaches 91%.

Embodiment 2

[0025] The lead plaster is washed and dried and ground into 200-300 mesh powder. Take 50g of lead plaster powder and place it in a 500ml beaker, add 150g of 25% sulfuric acid solution and 10g of 30% hydrogen peroxide, stir and react at 25°C for 3 hours, filter, and dry the filter cake to obtain 53.8g of lead sulfate. Pour 200g of saturated ammonium carbonate solution into lead sulfate, stir and react at 40°C for 5h, filter, and dry the filter cake to obtain 47.2g of crude lead carbonate. Add concentration 20% acetic acid solution 200g to lead carbonate crude product, filter after reaction is sufficient. Add 35g sodium carbonate in the filtrate, filter and dry after stirring reaction evenly, obtain 42.2g pure lead carbonate solid. The lead carbonate solid was roasted at 500°C for 3 hours in a muffle furnace to obtain 34.1g of PbO lead powder with a content of 99.9%, and the yield reached 95% based on the Pb content.

Embodiment 3

[0027] The lead plaster is washed and dried and ground into 200-300 mesh powder. Take 100g of lead plaster powder and place it in a 1000ml beaker, add 200g of 20% sulfuric acid solution and 20g of 30% hydrogen peroxide, stir and react at 25°C for 3h, filter, and dry the filter cake to obtain 107.1g of lead sulfate. Pour 600g of saturated ammonium carbonate solution into lead sulfate, stir and react at 40°C for 5h, filter, and dry the filter cake to obtain 97.6g of crude lead carbonate. Add 400g of concentration acetic acid 40% solution to the lead carbonate crude product, and filter after the reaction is sufficient. Add 70g of sodium carbonate to the filtrate, stir and react evenly and then filter and dry to obtain 85.2g of pure lead carbonate solid. Put the lead carbonate solid in a muffle furnace at 320°C for 4 hours to obtain 70.3g of 10%PbO 2 Content of the lead powder, based on the amount of Pb, the yield reached 94%.

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Abstract

The invention discloses a method for preparing highly oxidized lead powder from a waste battery lead plaster, which comprises the following steps: (1) grinding a waste lead plaster into powder; (2) adding a sulfuric acid solution and reducer into the lead plaster powder, sufficiently reacting, separating to remove the liquid, washing the solid material to neutral with water, and baking; (3) adding desulfurizer into the solid material obtained in the step (2), sufficiently reacting, separating to remove the liquid, washing the solid material to neutral with water, and baking; (4) adding an acid solution into the solid material obtained in the step (3), sufficiently reacting, removing the insoluble impurities to obtain a lead-containing solution, adding carbonate into the solution, sufficiently reacting, removing the liquid, washing the solid with water, and baking to obtain a pure lead carbonate solid; and (5) calcining the lead carbonate solid obtained in the step (4) in a muffle furnace to obtain the highly oxidized lead powder. The method has the advantages of low preparation cost, simple technical process and high lead recovery rate and quality, and can obviously lower energy consumption and reduce environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of lead-acid battery recycling, and in particular relates to a method for preparing lead powder with high oxidation degree by using waste battery lead paste. Background technique [0002] As the main metal raw material, lead is widely used in many aspects of the national economy. As a traditional industry with high resource and energy consumption, the lead industry is at the cost of non-renewable natural resources. [0003] With the vigorous development of the automobile industry, the demand for batteries is also increasing, and they will not be replaced by other products in the short term. At present, the amount of lead used in batteries accounts for more than 75% of the total lead consumption. The development of the battery industry has become the main factor driving lead consumption, and the amount of scrapped lead-acid batteries also increases with the increase in battery consumption. The amount of scra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00H01M10/54C01G21/02C01G21/10
CPCY02P10/20Y02W30/84
Inventor 张祖波阮华屹刘长来夏诗忠张行祥
Owner YANGZHOU APOLLO BATTERY
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