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Beneficiation method of low-grade zinc-contained raw ore

A beneficiation method and low-grade technology, applied in the beneficiation field of low-grade zinc-containing raw ore, can solve the problems of low beneficiation recovery rate, low economic value, environmental pollution, etc., achieve high reaction selectivity, reduce energy consumption, and solve environmental pollution Effect

Inactive Publication Date: 2018-11-23
CHONGQING DONGQUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
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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

[0142] 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.

[0143] 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%.

[0144] Get 600 milliliters of the zinc-ammonia complex solution obtained ...

Embodiment 2

[0148] 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.

[0149] 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%.

[0150] Get 600 milliliters of the zinc-ammonia complex solution obtained by filtering after leaching, add 18.98 grams of calc...

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Abstract

The invention relates to a beneficiation method of low-grade zinc-contained raw ore. The method comprises a digestion step, a sedimentation step, a calcium zincate synthesis step and a drying step. Bymeans of the method, economical and environment-friendly utilization of the ultralow-grade zinc oxide ore is achieved, the application range is wide, ammonia distillation is not needed, the method issimple, convenient and easy to implement, energy consumption of a technology is greatly reduced, and the various problems of water treatment pressure, high temperature and high pressure potential safety hazards, equipment corrosion and the like caused by ammonia distillation are solved; by means of the method, the aims of the technology recovery rate and a high grade are achieved, and the problemthat a raw material needs to be subjected to a secondary treatment technology process after being subjected to sulphur treatment is solved; the method is little in pollution, supplemental materials can be recycled, and the problem of environmental pollution brought by existing zinc oxide treatment technology supplemental materials is solved; by means of the method provided by the invention, calcium zincate synthesis in a zinc-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 resource utilization of low-grade zinc-containing raw ore, and particularly relates to a mineral processing method of 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 need to be imported every year. my country is a country rich in zinc oxide resources. The reserves of zinc metal in zinc oxide ore in my country are about 28 million tons, accounting for about 27.7% of the zinc metal reserves in zinc oxide ore in the world. Zinc oxide mines in my country generally have a low zinc grade, with an average grade of less than 5%. At present, the stagnant ore and lean ore reserves that cannot be economically utilized account for t...

Claims

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Application Information

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IPC IPC(8): C22B3/14C22B3/44C22B19/20
CPCC22B3/14C22B3/44C22B19/24Y02P10/20
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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