Method for preparing nano calcium zincate from zinc-containing raw ores

A calcium zincate, nanotechnology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for material and surface science, can solve the problems of unsuitable industrial application, high cost, easy to be interfered by impurities, etc., to solve the problem of process recovery rate and quality of high-quality products, realize economical and environmental protection utilization, and avoid the effect of water treatment pressure

Inactive Publication Date: 2018-09-28
CHONGQING DONGQUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above method, the finished high-purity zinc oxide or finished zinc salt needs to be used as the starting raw material, the raw material is expensive, and the reaction conditions are harsh, the energy con

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] In a zinc mine in Yunnan, the zinc content is 5.6%, and the oxidation rate of the raw ore is 96.3%. The main form of zinc in this mine is zinc carbonate.

[0121] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (10% of total ammonia mass concentration, 3% 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, the filtered liquid contains 1.632% zinc (calculated in zinc oxide equivalent), the mass concentration of carbonate in the liquid is 4.23%, and the increased part is 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 leaching process is 90.79%, and the recovery rate of total zinc is 87.43%.

[0122] Purify the zinc ammonia complex solution obtained by filtering.

[0123] Take 600 ml of zinc-ammonia complex...

Embodiment 2

[0126] In a zinc mine in Chongqing, the zinc content is 4.7%, and the oxidation rate of the raw ore is 95.52%. The main form of zinc in the mine is zinc silicate.

[0127] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-ammonium bicarbonate mixed solution (10% of total ammonia mass concentration, 3% 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, the filtered liquid contains 1.367% zinc (calculated in zinc oxide equivalent), the mass concentration of carbonate in the liquid is 3.54%, 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 91.35%, and the recovery rate of total zinc is 87.26%.

[0128] Purify the zinc ammonia complex solution obtained by filtering.

[0129] Take 600 ml of zinc-ammonia...

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PUM

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Abstract

The invention relates to a method for preparing nano calcium zincate from zinc-containing raw ores. The method comprises the steps of digestion, optional purification, carbon removal, calcium zincatesynthesis, optional rinsing and drying. The method combines wet-process leaching and the synthesis technology, ultralow grade zinc ore economical and environment-friendly utilization can be achieved,the application range is wide, no ammonia distillation is needed, the method is easy and convenient to implement, the energy consumption of the technology is greatly lowered, water treatment pressurecaused by ammonia distillation, high-temperature and high-pressure potential safety hazards, equipment corrosion and other problems are further avoided, the environment-friendly problem that the balance of process water is affected due to the fact that steam is brought into remaining water in the ammonia circulation technology is solved, the purposes of high technology recycling rate and high quality good level are achieved, contaminations are low, auxiliary materials can be recycled, and synthesis of nano calcium zincate 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 nanometer calcium zincate by using 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, among which the min...

Claims

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Application Information

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IPC IPC(8): C01G9/00B82Y30/00
CPCC01G9/00B82Y30/00C01P2004/64C01P2006/80
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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