Beneficiation method of low-grade zinc-containing raw ore

A beneficiation method and low-grade technology, which is applied in the beneficiation of low-grade zinc-containing raw ore, and can be used in the field of beneficiation of low-grade zinc-containing raw ore through the calcium zincate synthesis step, which can solve the problem of low recovery rate of ore dressing, low economic value, and separation effect. To achieve the effect of avoiding environmental pollution, high selectivity, and reducing energy consumption

Active Publication Date: 2020-04-07
CHONGQING DONGQUN TECH CO LTD
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  • Summary
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the beneficiation process of low-grade zinc ore has problems such as high energy consumption, poor separation effect, 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

[0154] In a zinc mine in Yunnan, the zinc content is 11.67%, and the oxidation rate of the raw ore is 95.2%. The main form of zinc in this mine is zinc carbonate.

[0155] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (10% of total ammonia mass concentration, 5% of carbonate root mass concentration) and carry out stirring and leaching, the leaching temperature is normal temperature, and the stirring time is 2 hours, Then filter, after filtering, the mass concentration of zinc in the liquid is 3.374% (calculated as zinc oxide, then 4.2%), and the mass concentration of carbonate in the liquid is 6.21%, and the increased part is brought in by zinc carbonate in the raw ore. According to the inspection data, the recovery rate of soluble zinc in the raw ore during the leaching process is 91.11%, and the recovery rate of total zinc is 86.74%.

[0156] Get 600 milliliters of the zinc-ammonia complex solution obtained ...

Embodiment 2

[0160] The basic steps are the same as in Example 1, but in the final step, the mixture of calcium carbonate and zinc hydroxide (i.e. the first solid) is combined with the mixture mainly containing calcium zincate (i.e. the second solid) at 105°C After drying, the dried mixture is calcined at 950° C. for 2 hours to obtain a beneficiation product whose main components are zinc oxide and calcium oxide. Sampling and analysis of the beneficiation product obtained by calcination showed that the zinc oxide content in the mixed product was 55.2%.

Embodiment 3

[0162] In a zinc mine in Chongqing, the zinc content is 12.93%, and the oxidation rate of the raw ore is 94.82%. The main form of zinc in this mine is zinc silicate.

[0163] Get 300 grams of zinc-containing raw ore, put it into 900 milliliters of ammonia-ammonium bicarbonate mixture (10% total ammonia mass concentration, 6% carbonate mass concentration) and carry out heating and stirring extraction, extraction temperature is 50 ° C, and stirring time is 2 hours , and then filtered, after filtering, the mass concentration of zinc in the liquid was 3.681%, and the mass concentration of carbonate in the liquid was 6.34%, and the increased part was brought in by zinc carbonate in the raw ore. According to the test data, the recovery rate of soluble zinc in the raw ore during the extraction process is 90.07%, and the recovery rate of total zinc is 85.41%.

[0164] Get 600 milliliters of the zinc-ammonia complex solution obtained by filtering after leaching, add 18.98 grams of calc...

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PUM

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Abstract

The invention relates to a beneficiation method of low-grade zinc-containing raw ore, in particular to a method for beneficiating the low-grade zinc-containing raw ore through a calcium zincate synthesis step, which comprises an extraction step, a decarburization precipitation step, a calcium zincate synthesis step and a drying calcination step.

Description

technical field [0001] The invention belongs to the comprehensive technical field of inorganic chemical industry and mineral processing technology, and relates to the resource utilization of low-grade zinc-containing raw ore, in particular to a method for mineral processing of low-grade zinc-containing raw ore, and in particular to a method for processing low-grade zinc-containing raw ore through calcium zincate synthesis steps. A method for beneficiation of zinc-containing raw ore. Background technique [0002] The continuous decline in the grade of zinc ore is a common situation faced by mining enterprises in many countries and regions in the world. Although the total amount of zinc ore in China is relatively abundant, the ore sources are generally of low grade, with an average zinc grade of less than 5%, and low-grade mining tailings and mineral processing tailings containing 3% to 5% of zinc oxide are stockpiled in large quantities. This kind of dull ore ore has low zin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/02C22B19/20
CPCC22B19/02C22B19/24C22B19/26C22B3/14C22B3/44C22B19/20C22B19/34C01F11/02C01G9/03Y02P10/20
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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