Method for producing electrolytic zinc from zinc oxide-containing materials

A technology for electrolysis of zinc and zinc oxide, which can be used in photography technology, instruments, photography auxiliary technology and other directions, and can solve the problems of low solubility of material and liquid, long leaching cycle, and large energy consumption.

Inactive Publication Date: 2009-09-30
谷亮
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  • Claims
  • Application Information

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Problems solved by technology

Production practice proves that direct heap leaching or tank leaching after crushing and fine grinding is to be used in this process. This process has long leaching cycle, large loss of leaching agent, low solubility of material liquid, and conventional heating and decomposition of metal solution, which con

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  • Method for producing electrolytic zinc from zinc oxide-containing materials

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Embodiment Construction

[0032] A low-grade zinc oxide ore with a zinc content of 8% is put into the inlet of the crusher, and the crusher crushes the ore to less than 30mm. Then, the crushed ore is ground into a fine powder with a particle size of less than 100 mesh by a ball mill, and the ground powder is transported to the mixing tank feeder by a conveyor. Then, the mixed solution of ammonia and carbon ammonia (the concentration of ammonia water is 6%, and the concentration of carbon ammonia is 5%) in the mixing tank is used as the leaching agent, and the stirring device is opened first, and then the feeder is opened to make the leaching solution and the mineral powder. Reaction, the liquid-solid volume ratio is 2.5:1, react for 2 hours, turn off the stirring device, the generated zinc complex solution, ore sand and ore slime will naturally settle to the mixing tank for 30 minutes by their own weight, and open the feed liquid in the middle and lower part of the mixing tank Valve, the feed liquid fl...

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Abstract

The invention provides a method for producing electrolytic zinc from zinc oxide-containing materials. The method adopts the steps of powder crushing, ammonia leaching, hydrolysis, first stage recovery of leaching agent, liquid preparation, second stage recovery of the leaching agent, impurity removal as well as electrolysis to produce the electrolytic zinc. The method is particularly suitable for processing low-grade zinc oxide ores; firstly, the ores are prepared into mineral powder; by taking mixed solution of caustic soda and carbon-ammonia or mixed solution of ammonia water and carbon-ammonia as a leaching agent, the leaching agent and the mineral powder are subjected to two-stage or three-stage reaction in a sealed stir bucket to obtain a leach solution of zinc; the leach solution is vacuum-heated to distill ammonia components and hydrolyze the ammonia components to basic zinc carbonate; the ammonia components are absorbed by an absorber for standby; the basic zinc carbonate is dissolved by sulfuric acid or waste solution of electrolytic zinc to prepare a solution and remove impurities so as to prepare a zinc electrolyte, and CO2 generated during the reaction is absorbed by the absorption liquid for cyclic ore soaking; finally, the zinc electrolyte is mixed with the electrolytic waste solution, the mixture is sent to an electrolytic plant to produce the metal zinc by electrolysis, and the electrolytic waste solution is sent to the liquid preparation procedure for reutilization. The method has the advantages of low energy consumption, low cost and reutilization of waster used in production, and can fully utilize developing zinc resources.

Description

technical field [0001] The invention relates to a method for producing electrolytic zinc by using a material containing zinc oxide, which is especially suitable for processing low-grade zinc oxide ore. The electrolytic zinc is produced by adopting the method of powder material-ammonia leaching-hydrolysis-one-step recovery of leaching agent-liquid preparation-second-stage recovery of leaching agent-removal of impurities-electrolysis, and the method belongs to the field of zinc smelting in hydrometallurgy. [0002] Metal zinc is a basic non-ferrous metal, which is widely used in electronics, light industry, metallurgy, machinery manufacturing and other industries. At present, the main process of producing zinc in my country is to use zinc sulfide ore to produce zinc fine powder through flotation process, and then to produce electrolytic zinc by oxidizing and roasting with sulfuric acid to dissolve and remove impurities. However, with the massive development of primary ore, mine...

Claims

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Application Information

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IPC IPC(8): C25C1/16C22B3/14
CPCY02P10/20
Inventor 请求不公开姓名
Owner 谷亮
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