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Method for producing zinc-containing compound through zinc-containing raw ore

A compound and raw ore technology, applied in the direction of improving process efficiency, can solve the problems of poor comprehensive economic benefits, inability to process, and unsuitable for industrial applications, so as to solve the problems of process recovery rate and high-quality goods grade, avoid water treatment pressure, Wide range of effects

Inactive Publication Date: 2018-11-06
CHONGQING DONGQUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The selectivity of sulfuric acid leaching method is low, and a large amount of soluble silicon in the ore will be leached, and the generated colloidal silicon is difficult to filter, and the acid leaching method generates a large amount of sulfate residue, which causes great environmental protection treatment pressure; sulfuric acid leaching cannot effectively Treat the zinc silicate, zinc ferrite and other components in the ore
The calcium chloride method cannot effectively deal with the leaching of zinc silicate, zinc ferrite and other components in the raw ore, and the leaching rate is not ideal, requiring high temperature leaching, and the comprehensive economic benefits are not good
In the ammonium chloride method, after the raw ore is leached, the process of recovering the zinc component from the leaching solution is very difficult, which is not suitable for industrial application.
[0007] Therefore, the existing technology is not satisfactory for the utilization of low-grade zinc-containing raw ore

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] 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.

[0151] Get 300 grams of zinc oxide 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, leaching temperature is normal temperature, 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%.

[0152] The zinc-ammonia complex liquid zinc-ammonia complex liquid obtained by filtering i...

Embodiment 2

[0157] 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.

[0158] 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%.

[0159] The zinc-ammonia complex liquid zinc-ammonia complex liquid obtained by filtering is purified.

[0160] Get 600 milli...

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PUM

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Abstract

The invention relates to a method for producing a zinc-containing compound through a zinc-containing raw ore. The method comprises the steps of extraction, optional purification, precipitation, optional rinsing, calcium zincate synthesis and drying calcinations. According to the method, wet leaching and a synthesis process are combined, thus economic and environment-friendly utilization of the ultra-low-grade zinc ore is achieved, the application range is wide, ammonia distilling is not needed, the easy, convenient and feasible effects are achieved, and energy consumption of the process is greatly reduced; the problems in various aspects such as water treatment pressure, high-temperature and high-pressure safety hidden dangers and equipment corrosion caused by ammonia distilling can further be avoided; the encountered problem of environment protection due to the fact that in the ammonia circulation process, steam brings surplus water in and consequently balance of process water is affected is solved, the problems of process recovery rate and fine grade are solved, pollution is small, and auxiliary materials can be recycled; and calcium zincate synthesis under the zinc ammonia environment is achieved for the first time.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, relates to resource utilization of low-grade zinc-containing raw ore, in particular to a method for producing zinc oxide and calcium oxide composites by utilizing low-grade zinc oxide 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 the vast majority, a...

Claims

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Application Information

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IPC IPC(8): C22B3/14C22B3/44C22B19/20C22B19/34
CPCC22B3/14C22B3/44C22B19/24C22B19/34Y02P10/20
Inventor 岳辉伟李世川龙忠祥蒋涛刘权锋
Owner CHONGQING DONGQUN TECH CO LTD
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