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Method for treating zinc-containing materials in zinc hydrometallurgy production

A technology of hydrometallurgy and treatment method, which is applied in the field of hydrometallurgy, can solve problems such as inability to efficiently recycle, difficult to recycle, and low iron content, so as to save operating procedures, simplify zinc smelting process, and improve comprehensive The effect of recovery

Active Publication Date: 2021-12-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more than 80% of the iron in the hot acid leaching process enters the solution. Currently, most zinc hydrometallurgical enterprises use the jarosite method or the goethite method to remove the iron in the hot acid leaching solution, so that the iron is converted into hazardous waste ferrojaroxa. Alum slag or hazardous waste goethite slag precipitates out. This type of iron-containing waste slag has a low iron content and is difficult to recycle. According to the "Lead and Zinc Industry Standard Conditions" issued by the country in 2015, the above-mentioned hazardous waste iron slag must be processed Harmless treatment
According to statistics, 1.2-1.4 tons of hazardous waste jarosite slag or 0.8-1.0 tons of hazardous waste goethite slag will be produced for every 1 ton of zinc roasted ore, and the cost of harmless treatment of hazardous waste iron slag per ton is as high as 600-800 Yuan
In addition, the current hot acid leaching process still has problems such as the inability to efficiently recover valuable elements such as copper, indium, and germanium.

Method used

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  • Method for treating zinc-containing materials in zinc hydrometallurgy production

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A method for processing zinc-containing materials in zinc hydrometallurgy production, the specific steps are as follows:

[0051] (1) The zinc roasted ore (mass percentage content of main elements: zinc 56.4%, iron 6.0%, lead 3.0%, silver 0.01%) is mixed with water and then mechanically activated in a wet ball mill to obtain the particle size of the zinc roasted ore 100 mesh finely ground pulp;

[0052] (2) After the finely ground pulp produced in step (1) is mixed with pyrolusite, zinc electrowinning waste liquid, and stage I pressurized leaching liquid through the metering pump in the 1# stirring and leaching tank, the 2#, 3 #, 4#, and 5# agitation and leaching tanks carry out four-stage normal pressure neutralization and leaching, and the reaction slurry overflows from 1# agitation tank to 2# to 5# agitation and leaching tanks through the chute, and controls 1# to 5# agitation The reaction temperature of the leaching tank is 60°C, 65°C, 65°C, 65°C, and 65°C in seque...

Embodiment 2

[0058] A method for processing zinc-containing materials in zinc hydrometallurgy production, the specific steps are as follows:

[0059] (1) The zinc roasted ore (mass percentage content of main elements: zinc 45.0%, iron 9.2%, lead 1.6%, silver 0.005%) is mixed with water and then mechanically activated in a wet ball mill to obtain the particle size of the zinc roasted ore 150 mesh finely ground pulp.

[0060] (2) After the finely ground pulp produced in step (1) is mixed with pyrolusite, anode slime, zinc electrowinning waste liquid, and stage I pressurized leaching liquid through the metering pump in the 1# stirring and leaching tank, the 2 #, 3#, 4#, and 5# agitated leaching tanks carry out four-stage normal pressure neutralization and leaching, and the reaction slurry overflows from 1# agitating tank through the chute to 2# to 5# agitating leaching tanks, and controls the 1# to 5# agitating leaching tanks. The reaction temperature of 5# agitated leaching tank is 85°C, 80...

Embodiment 3

[0066] A method for processing zinc-containing materials in zinc hydrometallurgy production, the specific steps are as follows:

[0067] (1) The zinc roasted ore (mass percentage content of main elements: zinc 60.0%, iron 12.4%, lead 0.5%, silver 0.015%) is mixed with water, and then mechanically activated in a wet ball mill to obtain the particle size of the zinc roasted ore 200 mesh finely ground pulp.

[0068] (2) After the finely ground pulp produced in step (1) is mixed with anode slime, zinc electrowinning waste liquid, and stage I pressurized leaching liquid through the metering pump in the 1# stirring leaching tank, the 2#, 3 #, 4#, and 5# agitation and leaching tanks carry out four-stage normal pressure neutralization and leaching, and the reaction slurry overflows from 1# agitation tank to 2# to 5# agitation and leaching tanks through the chute, and controls 1# to 5# agitation The reaction temperature of the leaching tank is 75°C, 75°C, 75°C, 75°C, and 75°C in seque...

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Abstract

The invention relates to a method for treating zinc-containing materials in zinc hydrometallurgy production, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: (1) grinding ore; (2) performing normal pressure neutralization and leaching; (3) performing I-stage pressure leaching; (4) performing II-stage pressure leaching; and (5) slurrying and washing leaching residues. According to the method for treating the zinc-containing materials in zinc hydrometallurgy production, efficient leaching of valuable metals and efficient synchronous precipitation of iron in the zinc-containing materials in zinc hydrometallurgy production are achieved at the same time. The zinc leaching rate is greater than 98%. Obtained leachate with the iron content less than 2g / L can be returned to a zinc hydrometallurgy main system without iron removal. The iron in the zinc-containing materials in zinc hydrometallurgy production is ingeniously converted from a hazardous impurity to a pyrometallurgical lead smelting material, and finally is stably solidified in pyrometallurgical lead smelting furnace slag or kiln slag. The operation procedure of solution iron removal in the zinc hydrometallurgy process is eliminated. The technological process is simplified. The process operation cost is reduced. Discharge reduction of hazardous waste iron residues in the zinc-containing materials in zinc hydrometallurgy production is achieved.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for processing zinc-containing materials in zinc hydrometallurgy production. Background technique [0002] Metal zinc is known as "the protective agent of modern industry", and it is an indispensable strategic metal in aerospace, transportation, energy industry and other fields. Sulfide ore is the main raw material for extracting zinc. At present, more than 85% of the world's zinc sulfide ore is produced by the main wet process of roasting-leaching-purification-electrowinning. According to different leaching methods and leaching slag treatment methods, the treatment methods of zinc-containing materials are divided into conventional treatment process and hot acid leaching process. [0003] Zinc-containing materials are often associated with iron in the zinc hydrometallurgy process. During the leaching process, iron, zinc, germanium, copper, indium and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B7/04C22B19/30C22B19/20C22B11/00C22B13/02C22B13/00
CPCC22B3/08C22B7/007C22B7/04C22B19/22C22B19/30C22B13/045C22B13/025C22B11/04C22B11/044Y02P10/20
Inventor 李存兄张兆闫魏昶邓志敢李兴彬樊刚李旻廷
Owner KUNMING UNIV OF SCI & TECH
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