Method for producing zinc finemeal with zinc oxide mine or zinc slag

A technology of zinc oxide ore and zinc powder, applied in the direction of improving process efficiency, can solve the problems of restricting large-scale utilization, large environmental impact, and difficult filtration of feed liquid

Inactive Publication Date: 2008-12-03
谷亮
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the large environmental impact and the difficulty of filteri

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  • Method for producing zinc finemeal with zinc oxide mine or zinc slag

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Embodiment Construction

[0021] A specific embodiment of the present invention is to use a jaw crusher to crush a low-grade zinc oxide ore with a zinc content of 8%, and the particle size of the crushed ore is below 50mm. The crushed ore is then crushed into mineral powder with a particle size of 0.1-2mm by sand blasting equipment, and transported to the leaching tank. Then the mixed solution of ammoniacal liquor and ammonium bicarbonate (the solubility of ammonia water is 2%, and the solubility of ammonium bicarbonate is 6%) in the mixing tank is used as the ore leaching agent, and the ammoniacal leaching solution is input in the leaching tank, and the leaching The liquid reacts with the ore powder, and the liquid-solid volume ratio is 2:1. The resulting zinc complex solution permeates to the bottom of the leaching tank by its own weight, flows out from the drain pipe at the bottom of the ore layer, and enters the liquid collection tank. When the concentration of zinc ions in the leaching solution is...

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Abstract

The invention relates to a method for manufacturing fine zinc powders by using zinc oxide ores or zinc slag, which adopts a procedure comprising ore crushing, ammonia leaching, filtration and zinc depositing to manufacture the fine zinc powders, and is particularly suitable for processing low grade zinc oxide ores or zinc slag, with the zinc content being 2 to 18 percent. Firstly, the ores are crushed into powdered ores; secondly, a mixed solution composed of ammonia water and ammonium hydrogen carbonate or the mixed solution composed of sodium hydroxide and the ammonium hydrogen carbonate is used as an ore dipping reagent to react with the powdered ores, to lead zinc in the ores to enter the solution in the form of a zinc ammonia complex compound and to enable the impurities such as lead, cadmium, manganese, calcium, silicon, etc. to be left in the zinc slag; the separation between the zinc and the impurities is realized; then any one or any two and more than two of ammonia sulfide, sodium sulfide, and potassium sulphuret are cooperatively used as a precipitator for precipitating the zinc so as to produce the fine zinc powders; the fine zinc powders are filtered and the fine zinc powder products are obtained after the fine zinc powders are dried; filter liquor is returned to an ore dipping pool for recycling use. The method has the advantages of normal temperature operation, low energy consumption, short procedure, and simple solution purifying, and can utilize the zinc resources to be developed fully and effectively.

Description

technical field [0001] The method for producing zinc fine powder with zinc oxide ore or zinc slag involved in the present invention adopts the process of powder ore-ammonia leaching-filtration-precipitating zinc to produce zinc fine powder, which is especially suitable for processing low-grade zinc oxide with a zinc content of 2-18%. Zinc ore or zinc ballast. The method belongs to the field of chemical beneficiation engineering in hydrometallurgy. [0002] Zinc fine powder is a main raw material for the production of metal zinc. The main raw material for zinc production in my country - zinc fine powder is produced by flotation process with zinc sulfide ore. In the process of developing zinc sulfide ore and high-grade zinc oxide ore, a large number of low-grade zinc oxide ore and zinc slag are discarded as waste rocks, which causes a great waste of the country's mineral resources, and low-grade zinc oxide ore has always been useless. Industrial development and production resear...

Claims

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Application Information

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IPC IPC(8): C22B19/02C22B3/14C22B3/22
CPCY02P10/20
Inventor 请求不公开姓名
Owner 谷亮
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