Method for synthesizing tetrabasic lead sulfate by utilizing positive electrode waste lead plaster and application thereof

Abstract

The invention discloses a method for synthesizing tetrabasic lead sulfate by utilizing positive electrode waste lead plaster and application thereof. The method comprises the following steps of washing, filtering, separating, dehydrating, drying, sieving and purifying the positive electrode waste lead plaster, and then, carrying out chemical analysis on a treated mixture, thereby obtaining contents of various components of lead sulfate, lead oxide and free lead in the treated mixture according to chemical analysis, adding lead powder to carry out mixing, grinding and sieving, so that the molar ratio of the lead oxide to lead sulfate after hybrid reaction is (4-5):1; and preserving the heat and presintering the sieved mixture in a resistance furnace, and then heating up to sinter, cooling and drying to obtain the tetrabasic lead sulfate. The method can be used for a storage battery manufacturer to prepare according to convenient conditions of the manufacturer, is simple and easy to implement; the prepared tetrabasic lead sulfate can completely satisfy performance requirements while being applied to battery production, so that early capacity loss of a lead storage battery is restrained, various electrical performances of the battery and a cycle life of the storage battery are greatly improved and prolonged, respectively, thereby not only solving a treatment problem of lead-containing waste materials of the storage battery enterprises, but also lowering production cost of enterprises and changing waste into things of value.

Description

technical field [0001] The invention relates to the technical field of waste lead paste recycling, in particular to a method for synthesizing tetrabasic lead sulfate by using positive electrode waste lead paste and its application in batteries. Background technique [0002] Lead-acid batteries are widely used in many fields because of their strong power, abundant raw materials, and low prices. However, a large amount of lead-containing waste is also produced in the production process of lead-acid batteries, which will cause serious environmental pollution if discharged. Most enterprises have not yet formed a complete recycling system. The general treatment method is to dry and pulverize the lead-containing waste and directly add it back to the lead paste for production, or sell it to metal processing enterprises for recycling, which virtually increases the cost of the enterprise. Therefore, it is the purpose of the research and development personnel to explore the eff...

AI Technical Summary

Problems solved by technology

[0004] At present, the most used method is to increase the temperature of the paste or to perform high-temperature curing, but it is difficult to control the amount and particle size of tetrabasic lead sulfate in the lead paste. Once the content of tetrabasic lead sulfate in the lead paste is too high, It is easy to cause difficulty in formation and greatly reduce the initial capacity of the battery

[0005] Of course, purchasing 4BS and adding it to lead paste can solve this problem, but at present some foreign companies have mastered the core technology of 4BS, and there is little domestic production. Therefore, if the purchased 4BS with high purity is added to the production of batteries, it will increase the number of battery companies. production cost