Method for producing lead by executing electrolysis and alkaline leaching on lead sulfate material

A lead sulfate and material technology, which is applied in the improvement of process efficiency, photography process, instruments, etc., can solve the problems of complex structure of solid-phase electrolysis equipment, lengthy process, and difficult handling of multi-metal mixed materials, and achieves low alkali consumption, The effect of short process flow and high recovery rate
CN101760757AActive Publication Date: 2010-06-30GREENNOVO ENVIRONMENTAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GREENNOVO ENVIRONMENTAL TECH CO LTD
Publication Date
2010-06-30

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Abstract

The invention relates to a method for producing lead by executing electrolysis and alkaline leaching on lead sulfate material, comprising the following steps: placing the pasted lead sulfate material to a blending infiltration chamber of an alkaline leaching electrolysis bath, introducing DC electricity to the electrolysis bath, dissolving lead in the lead sulfate by sodium hydroxide so as to enter the solution, passing through a partition film to enter an electrolysis chamber, enabling lead ions in electrolyte to discharge and separate out on a cathode, obtaining metallic sponge lead or lead particles, regenerating partial sodium hydroxide in the solution, leading the electrolyte of the electrolysis outside, returning the electrolyte to the blending infiltration chamber to recycle after causticization treatment. The main alkaline leaching conditions are as follows: the cathode current density is 200-1000A / m2; the electrolyte temperature is 20-90 DEG C; the groove voltage is 1-5V; the electrode homopolar distance is 50-120mm; and the liquid and solid ratio of the slurry is 5-12: 1. The lead sulfate alkaline leaching and the lead electrolysis are carried out simultaneously in a same device, thereby regenerating solvent sodium hydroxide, simplifying the working procedures, reinforcing the dissolving process of the lead-bearing material, and widening the application range of the method on the lead-bearing material.
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Description

technical field

[0001] The invention is a hydrometallurgical method for treating lead sulfate and lead oxide materials, including minerals, and can be used to extract metallic lead from these materials. Background technique

[0002] At present, there are many hydrometallurgical methods for producing metallic lead from lead sulfate materials at home and abroad, mainly including carbonate conversion-fluorosilicate leaching-electrowinning and solid-phase electrolysis. The defects of these methods are mainly limited to the use of Process lead sulfate materials with relatively pure composition and high lead content, such as lead-acid battery paste, etc., but it is difficult to process materials with complex components and mixed metals; at the same time, the former method has a lengthy process, while the latter method uses solid-phase electrolysis The equipment structure is more complicated. Contents of the invention

[0003] The purpose of the present invention is to solve the...

Claims

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