Beneficiation method for low-grade raw ore containing zinc

A beneficiation method and low-grade technology, which are applied in the improvement of process efficiency, zinc oxide/zinc hydroxide, calcium/strontium/barium oxide/hydroxide, etc., can solve the problem of low beneficiation recovery rate, low economic value, environmental Pollution and other problems, to achieve high reaction selectivity, reduce energy consumption, and solve the effects of environmental pollution

Inactive Publication Date: 2018-12-07
CHONGQING DONGQUN TECH CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, the process of low-grade zinc ore utilization has problems such as high energy consumption, low beneficiation recovery rate, serious environmental pollution, and low economic value.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0141] In a zinc mine in Yunnan, the zinc content is 11.67%, and the oxidation rate of the original ore is 95.2%. The zinc component in this mine is mainly zinc carbonate.

[0142] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (total ammonia mass concentration 10%, carbonate mass concentration 5%) to carry out stirring and leaching, the leaching temperature is normal temperature, and the stirring time is 2 hours, Then filter, after filtration, the mass concentration of zinc in the liquid is 3.374% (4.2% based on zinc oxide), the mass concentration of carbonate in the liquid is 6.21%, and the increased part is brought in by zinc carbonate in the original ore. According to the inspection data, the recovery rate of soluble zinc in the raw ore during the leaching process was 91.11%, and the recovery rate of total zinc was 86.74%.

[0143] Get the zinc-ammonia complex solution obtained by filtration after 600 milli...

Embodiment 2

[0147] A zinc mine in Chongqing has a zinc content of 12.93% and a raw ore oxidation rate of 94.82%. The zinc in this mine is mainly in the form of zinc silicate.

[0148] Get 300 grams of zinc-containing raw ore, put it into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (total ammonia mass concentration 10%, carbonate mass concentration 6%) for heating and stirring leaching, leaching temperature 50 ° C, stirring time 2 hours , and then filter, after filtration, the mass concentration of zinc in the liquid is 3.681%, and the mass concentration of carbonate in the liquid is 6.34%, and the increased part is brought in by zinc carbonate in the original ore. According to the inspection data, the recovery rate of soluble zinc in the raw ore during the extraction process was 90.07%, and the recovery rate of total zinc was 85.41%.

[0149] Get the zinc-ammonia complex solution obtained by filtration after 600 milliliters of leaching, add 18.98 grams of calcium hydrox...

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PUM

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Abstract

The invention relates to a beneficiation method for low-grade raw ore containing zinc. The method comprises the steps of digestion, sediment, calcium zincate compounding and calcination. According tothe beneficiation method for the low-grade raw ore containing zinc, economical and environmentally-friendly utilization of ultralow-grade zinc ore is achieved; the application range is wide; ammonia distillation is not needed; the method is simple and easy to be implemented; technological energy consumption is lowered greatly; the problems with technology recovery rate and quality grade are solved; the deficiency of the technological process that secondary treatment is needed to be conducted on raw materials after sulfidizing is solved; pollution is little; auxiliary materials can be recycled;and the problem of environmental pollution brought about by auxiliary raw materials of existing zinc oxide treatment technology is solved. By means of the method, compounding of calcium zincate in azinc-ammonia environment is achieved for the first time.

Description

technical field [0001] The invention belongs to the comprehensive technical field of inorganic chemical industry and mineral processing technology, relates to the resource utilization of low-grade zinc-containing raw ore, and particularly relates to a mineral processing method for low-grade zinc-containing raw ore. Background technique [0002] The production and consumption of zinc in my country ranks first in the world. Domestic zinc resources cannot meet the production requirements, and a large amount of zinc raw materials needs to be imported every year. my country is a country rich in zinc oxide resources. The zinc metal reserves in my country's zinc oxide mines are about 28 million tons, accounting for about 27.7% of the zinc metal reserves in the world's zinc oxide mines. Zinc oxide mines in my country are generally of low zinc grade, with an average grade of less than 5%. [0003] Therefore, the efficient development and utilization of low-grade zinc oxide ore resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/20C22B3/14C22B3/44C22B19/34C01G9/03C01F11/02
CPCC01F11/02C01G9/03C22B19/24C22B19/26C22B19/34Y02P10/20
Inventor 岳辉伟李世川龙忠祥蒋涛刘权锋蒋文艺
Owner CHONGQING DONGQUN TECH CO LTD
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