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Method and system for treating lead-zinc sulfide ores

A technology of lead-zinc sulfide and treatment method, which is applied in the field of extracting zinc from lead-zinc sulfide ore by oxygen pressure acid leaching method, treatment system of lead-zinc sulfide ore, lead and sulfur, treatment field of lead-zinc sulfide ore, can solve Solve problems such as low zinc and lead recovery rates, achieve the effect of reducing energy consumption, reducing material volume, and eliminating loss problems

Inactive Publication Date: 2010-05-19
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the zinc concentrate and the lead concentrate contain relatively high amounts of lead and zinc, the recovery rate of zinc and lead in this method is low

Method used

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  • Method and system for treating lead-zinc sulfide ores
  • Method and system for treating lead-zinc sulfide ores
  • Method and system for treating lead-zinc sulfide ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Get lead-zinc sulfide ore (lead content is 2.6wt%, zinc content is 4.0wt%), after fine grinding, screening, adopt mixed flotation method to carry out ore dressing to lead-zinc ore sulfide, obtain lead-zinc sulfide concentrate (lead content is 15.0wt%, and the zinc content is 37.5wt%), and it is finely ground into a mineral powder whose particle size is less than 320 mesh and the particle size is 100%. Add a sulfuric acid solution with a concentration 3 times the weight of the mineral powder to 78g / l to the finely ground mineral powder, stir fully to make the mineral powder slurry, and inject the slurry into the first continuous horizontal autoclave. Oxygen was introduced into the autoclave, the temperature was raised to 150° C., the oxygen pressure during the reaction was maintained at 1.0 MPa, and the rotational speed of the stirrer in the autoclave was 220 rpm. After 45 minutes, the reaction was completed, and the reacted slurry was discharged, and after flashing trea...

Embodiment 2

[0073] Get lead-zinc sulfide ore (lead content is 5.1wt%, zinc content is 8.4wt%), after fine grinding, screening, adopt mixed flotation method to carry out ore dressing to lead-zinc ore sulfide, obtain lead-zinc sulfide concentrate (lead content is 18.3wt%, and the zinc content is 39.5wt%), and it is finely ground into a mineral powder with a particle size of less than 320 mesh and a particle ratio of 98.5%. Add a sulfuric acid solution with a concentration of 65g / l that is 5 times the weight of the mineral powder to the finely ground mineral powder, stir fully to make the mineral powder slurry, and inject the slurry into the first continuous horizontal autoclave. Oxygen was fed into the autoclave, the temperature was raised to 145° C., the oxygen pressure during the reaction was maintained at 0.8 MPa, and the rotational speed of the stirrer in the autoclave was 230 rpm. After 60 minutes, the reaction is completed, and the reacted slurry is discharged, and after flashing trea...

Embodiment 3

[0076] Get lead-zinc sulfide ore (lead content is 7.9wt%, zinc content is 15.6wt%), after fine grinding, screening, adopt mixed flotation method to carry out ore dressing to lead-zinc ore sulfide, obtain lead-zinc sulfide concentrate (lead content is 19.5wt%, and the zinc content is 39.6wt%), and then through the gravity separation process, the lead-zinc sulfide concentrate is separated into lead-zinc sulfide concentrate with low lead content (the weight ratio of Zn:Pb is greater than 1.5, and Zn and Pb The total content of elements is greater than 40wt%) and lead concentrate (lead content is 10.2wt%, zinc content is 42.5wt%). Finely grind it into mineral powder with a particle size of less than 320 mesh and a particle ratio of 98.7%. Add the finely ground mineral powder into the first slurry mixing tank, add a sulfuric acid solution with a concentration of 70g / l that is 6 times the weight of the mineral powder, stir fully to make the mineral powder slurry, and inject the slur...

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Abstract

The invention discloses method and system for treating lead-zinc sulfide ores. The method comprises the following steps of: dressing the lead-zinc sulfide ores to obtain concentrate lead-zinc sulfide ores; fine grinding the concentrate lead-zinc sulfide ores and pulpifying the fine-grinded concentrate lead-zinc sulfide ores by using sulfuric acid; carrying out a first stage of oxygen pressure acid leaching on the pulpified concentrate lead-zinc sulfide ores; after solid-liquid separation of the serosity leached from the first stage, purifying and electrolyzing the leached solution from the first stage to obtain a metal zinc, and dressing the slag leached from the first stage to obtain a simple substance of sulfur and part of lead sulfate; carrying out a second stage of oxygen pressure acid leaching on the leached slag of the first stage and conducting solid-liquid separation on the serosity leached from the second stage; returning the leached liquid of the second stage into a first stage pressurizing leaching container, and dressing the sulfur from the leached slag of the second stage; and sending the zinc sulfate and the second stage leached slag in which the sulfur is dressed out to a pyrogenic process for zinc melting. The method remarkably improves recovery rate of the lead and the zinc without generating large quantities of mineral dressing wastewater which is difficulty to treat. The invention also discloses a treatment system of lead-zinc sulfide ores.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metallurgy, and more specifically relates to a treatment method of lead-zinc sulfide ore, in particular to a method for extracting zinc, lead and sulfur from lead-zinc sulfide ore by oxygen pressure acid leaching , and also relates to a treatment system for lead-zinc sulfide ore. Background technique [0002] Most of the lead-zinc ore resources in the world are mixed associated sulfide ores. In the middle of the 20th century, the closed blast furnace was usually used as the main equipment, and the pyrometallurgical technology was used to process the mixed lead-zinc ore to extract zinc and lead. However, this method consumes a lot of energy. Moreover, a large amount of sulfur dioxide will be produced in the production process. With the increasingly strict requirements on the environment and energy in today's society, the use of this method is greatly restricted. [0003] At present, the lead-z...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C25C1/16C22B13/02C22B3/02C01B17/06
CPCY02P10/20
Inventor 王吉坤杨大锦彭建蓉阎江峰李小英张红耀
Owner KUNMING METALLURGY INST
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