Beneficiation method for low-grade zinc-containing raw ores

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: 2018-12-14
CHONGQING DONGQUN TECH CO LTD
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  • Abstract
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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

[0112] 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.

[0113] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-carbon ammonia mixture (10% of total ammonia mass concentration, 3% of carbonate 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%.

[0114] Take 600 ml of zinc-ammonia complex solution obtained by filtering after leaching, add 14.55 g of calcium oxide to precipitate ...

Embodiment 2

[0116] 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.

[0117] Get 300 grams of zinc-containing raw ore, put into 900 milliliters of ammonia-carbon ammonia mixture (10% of total ammonia mass concentration, 3% of carbonate 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%.

[0118] Take 600 ml of zinc-ammonia complex solution obtained by filtering after leaching, add 12.18 g of calcium oxide to pre...

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PUM

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Abstract

The invention relates to a beneficiation method for low-grade zinc-containing raw ores. The method comprises the steps of leaching, decarbonization, calcium zincate synthesis, and drying. The method disclosed by the invention has the advantages that wet leaching is combined with a beneficiation technique, so that ultralow-grade zinc ores can be utilized in an economical and environment-friendly manner, the application range is wide, ammonia distillation is not required, high simplicity and convenience are achieved, the problems of a low recovery rate and a low concentrate grade of the beneficiation technique are solved, and the defect that vulcanized raw materials need to go through a secondary treatment process is overcome; the pollution is low, and supplemental materials are recyclable,so that the problem of environmental pollution caused by supplemental raw materials in the conventional zinc oxide treatment process is solved; and the calcium zincate synthesis under 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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Patent Type & Authority Applications(China)
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蒋文艺
Owner CHONGQING DONGQUN TECH CO LTD
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