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Method for producing strontium zincate from zinc-containing crude ore

A technology of strontium zincate and raw ore, which is applied in the direction of chemical instruments and methods, zinc compounds, process efficiency improvement, etc., can solve the problems of poor comprehensive economic benefits, inability to process, large environmental protection treatment pressure, etc., and achieve a solution to process recovery rate and the quality of products, avoiding the pressure of water treatment, and solving the effect of environmental pollution

Inactive Publication Date: 2018-11-27
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

[0115] 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.

[0116] 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%.

[0117] Purify the zinc ammonia complex solution obtained by filtering.

[0118] Take 600 ml of zinc-ammonia complex...

Embodiment 2

[0121] 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.

[0122] 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%.

[0123] Purify the zinc ammonia complex solution obtained by filtering.

[0124] Take 600 ml of zinc-ammoni...

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Abstract

The invention relates to a method for producing strontium zincate from zinc-containing crude ore. The method includes a digestion step, an optional purification step, a decarburization step, a strontium zincate synthesis step, an optional rinsing step and a drying step. The method has the advantages that wet leaching and synthesis processes are combined with one another, accordingly, the ultralow-grade zinc ore can be utilized in an economic and environmental protection manner, the method is wide in application range and is simple, convenient and feasible, ammonia distillation can be omitted,energy consumption of processes can be reduced to a great extent, the problems in diversified aspects such as water treatment pressures due to ammonia distillation, high-temperature and high-pressurepotential safety hazards and equipment corrosion further can be solved by the aid of the method, the problems in the aspect of environmental protection due to influence of surplus water volumes brought by steam on process water balance in ammonia circulation processes can be solved by the aid of the method, and the problems in the aspects of the recycling rates of existing processes and the gradeof refined products can be solved by the aid of the method; the method is little in pollution, auxiliary materials can be circulated, and the strontium zincate can be synthesized by the aid of the method in zinc and ammonia environments 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 strontium 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 mining tail...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/00C22B3/14C22B3/44C22B19/20
CPCC01G9/006C01P2006/80C22B3/14C22B3/44C22B19/24Y02P10/20
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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