Method of producing calcium zincate by means of zinc-containing raw ore

A technology of calcium zincate and raw ore, which is applied in chemical instruments and methods, zinc compounds, inorganic chemistry, etc., can solve the problems of unsuitable industrial application, easy to be interfered by impurities, and low yield, so as to avoid high temperature and high pressure safety hazards and equipment Corrosion problems, solving process recovery rate and high-quality goods grade problems, and solving the effect of environmental pollution

Inactive Publication Date: 2018-10-09
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

[0117] 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.

[0118] 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%.

[0119] Purify the zinc ammonia complex solution obtained by filtering.

[0120] Take 600 ml of zinc-ammonia complex...

Embodiment 2

[0123] 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 this mine is zinc silicate.

[0124] 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%.

[0125] Purify the zinc ammonia complex solution obtained by filtering.

[0126] Take 600 ml of zinc-ammoni...

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Abstract

The invention relates to a method of producing calcium zincate by means of zinc-containing raw ore. The method includes: an extraction step, an optional purification step, a decarbonization step, a calcium zincate synthesis step, a rinsing step, and a drying step. In the method, wet-leaching and synthetic technologies are combined, thus achieving economical and environment-friendly utilization ofultralow-grade zinc ore. The method is wide in application range, is free of ammonia distillation and is simple, can greatly reduce energy consumption, and can avoid problems of safety risk due to high-temperature and high-pressure and equipment corrosion, solves a problem of environmental protection of influence on process water balance since steam brings excessive water into an ammonia circulation process and solves a problem of recovery rate and grade of fine products of the technology. The method is low in pollution and is recyclable in assistant materials. For the first time, synthesis ofthe calcium zincate is achieved under the zinc-ammonia environment in the method.

Description

technical field [0001] The invention belongs to the technical field of inorganic chemical industry, relates to the resource utilization of low-grade zinc-containing raw ore, and particularly relates to a method for producing calcium zincate 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 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%. At present, the remaining ore and lean ore reserves that cannot be economically utilized account for the vast majority. Among the...

Claims

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Application Information

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IPC IPC(8): C01G9/00
CPCC01G9/00C01P2006/80
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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