Method for recovering lead-containing raw material by using wet process

A raw material, wet process technology, applied in the field of waste lead-acid battery recycling and regeneration, can solve the problems of large consumption of desulfurizer, generation of alkali mist, inclusion of impurities, etc., to achieve high-efficiency recovery methods and eliminate environmental pollution.
CN103526016AActive Publication Date: 2014-01-22北京中金瑞丰环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
北京中金瑞丰环保科技有限公司
Publication Date
2014-01-22

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Abstract

The invention discloses a method for recovering a lead-containing raw material by using a wet process. The method comprises the steps: (1) leaching the lead-containing raw material by using a solution, adding a reducing agent to reduce lead dioxide or lead orthoplumbate in the lead-containing raw material into a soluble lead salt, after a lead compound is completely dissolved, filtering the solution, and separating to obtain a filtrate A and an insoluble substance, wherein the solution contains sulfate, a complexing agent and a catalyst; (2) adjusting the pH value of the filtrate A, separating to obtain lead sulfate and a filtrate B, and returning the filtrate B to the step (1) after sulfate radicals are replenished and the pH value is adjusted; (3) directly using lead sulfate as battery materials or commodities, subjecting a sulfate-containing alkaline solution and lead sulfate to reaction, and separating to obtain basic lead sulfates and a filtrate C, wherein the basic lead sulfates include tribasic lead sulfate and tetrabasic lead sulfate. The method can be used for purifying the lead-containing raw material to form lead sulfate and basic lead sulfates directly used for producing lead-acid batteries, thereby being an environment-friendly wet-process recovery method.
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Description

technical field

[0001] The invention belongs to the technical field of recovery and regeneration of waste lead-acid batteries, and relates to a method for preparing high-purity lead sulfate or basic lead sulfate by chemically using lead paste or lead-containing raw materials in waste lead-acid batteries. Background technique

[0002] Since its birth, lead-acid batteries have occupied an important position in the secondary battery market, especially in automotive batteries, with its low price and reliable stability. According to statistics from relevant industry associations, the consumption of refined lead in China exceeded 4 million tons in 2011, of which the consumption of lead-acid batteries accounted for about 70%. Lead-acid batteries contain a large amount of toxic lead and its compounds. At present, the pyro-method recovery technology that has been industrialized produces lead vapor in the process of lead smelting and reduction, which causes serious pollution to the en...

Claims

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