Method for recycling waste lead plaster of waste polar plate

Abstract

The invention relates to a method for recycling waste lead plaster of a waste polar plate, which comprises the following specific steps that weak alkaline water and the waste polar plate are put intoa roller separator for stirring, and the lead plaster is separated from a plate grid through friction between polar plates in the roller separator and friction between the polar plates and a roller; lead slime formed by stirring and mixing the weak alkaline water and the dry lead plaster out of the roller separator is discharged through a valve; the lead slime discharged out of the roller separator is introduced into a circulation pipeline, and an iron remover device is placed in the circulation pipeline; the iron remover device is used for thoroughly treating scrap iron in the lead plaster; the lead slime discharged out of the drum separator is naturally precipitated through a precipitation tank, and the drum separator adopts drum gravity center friction separation. The lead plaster recycled by the recycling method is mixed with new lead plaster according to a certain proportion to form mixed lead plaster, and the mixed lead plaster is not greatly different from a battery produced bybrand-new lead plaster in open-circuit voltage consistency, capacity and cycle life, so that the recycling method can reduce the production cost.

Description

technical field [0001] The invention belongs to the technical field of lead storage battery pole plate recycling, and in particular relates to a method for recycling waste lead paste from waste pole plates. Background technique [0002] The pole plate is one of the main accessories of the lead-acid battery. The production process of the pole plate is very complicated. The complexity of the process has brought many quality problems to the product, which eventually leads to a high scrap rate of the pole plate. In order to reduce the production cost of the product, the scrap pole After the plate is recycled, the dry lead paste is separated from the grid, and the resulting dry lead paste is reused. After the grid is dried, it is returned to the furnace to prepare an alloy; the dry lead paste of the waste plate is stirred to produce lead muddy water, and the lead muddy water passes through the valve. The switch flows out of the mixer, and the lead mud water flows to the sedimenta...

AI Technical Summary

Problems solved by technology

[0002] The pole plate is one of the main accessories of the lead-acid battery. The production process of the pole plate is very complicated. The complexity of the process has brought many quality problems to the product, which eventually leads to a high scrap rate of the pole plate. In order to reduce the production cost of the product, the scrap pole After the plate is recycled, the dry lead paste is separated from the grid, and the resulting dry lead paste is reused. After the grid is dried, it is returned to the furnace to prepare an alloy; the dry lead paste of the waste plate is stirred to produce lead muddy water, and the lead muddy water passes through the valve. The switch flows out of the mixer, and the lead mud water flows to the sedimentation tank for precipitation, and then the settled lead paste is manually dug out and reused according to a certain proportion, which reduces the product scrap rate and completely realizes the situation of turning waste into treasure; stirring and scrapping The water and liquid sodium hydroxide are mixed, and the ratio of water and liquid sodium hydroxide is 100: (0.5-1.5) to form alkaline water; the lead powder produced by the negative pressure wind after the waste plate is dry stirred is used directly The main defects: (1) After the dry lead paste is mixed with new lead powder, the content of lead sulfate in the lead paste is inconsistent, resulting in poor consistency of the battery pack and short life of the battery pack; (2) The environment in the mixing area of ​​the waste plate is poor, and dust is flying everywhere , the lead rate among operators is high; (3) The particle size of lead powder produced by dry mixing of waste plates is inconsistent, resulting in poor consistency of battery capacity; if waste plates are not recycled and reused, if they are scrapped, the production cost of the product will increase

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