Method for enriching and recovering thallium from lead smelting system

A lead smelting and enrichment technology, applied in the direction of improving process efficiency, etc., to achieve the effects of reducing production costs, low toxicity, and ensuring product quality

Inactive Publication Date: 2020-05-01
HENAN YUGUANG GOLD & LEAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the present invention provides a method for enriching and recovering thallium from the lead smelting system. The recovery process of this method is simple and easy to handle. There is no addition of toxic and harmful reagents in the recovery process, and the entire recovery process is carried out in a cycle, with almost no The generation of waste liquid solves the defects of recycling thallium in the prior art

Method used

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  • Method for enriching and recovering thallium from lead smelting system

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Embodiment 1

[0045] A method for enriching and recovering thallium from a lead smelting system, the method comprising the following steps:

[0046] (1) Thallium and cadmium soot is collected from the lead concentrate smelting system; the specific process is as follows:

[0047] A: Put lead concentrate and auxiliary materials (stone, limestone, crushed coal, coke, about 10% of the total amount of auxiliary materials) into the oxygen-enriched bottom-blown furnace, and then use an oxygen lance to blow in oxygen (oxygen pressure is 0.5-1.2MPa, oxygen The blowing volume is 90-130m per ton of the mixture of lead concentrate and auxiliary materials. 3 oxygen. ), heating and smelting, oxidation smelting and desulfurization at 950-1300°C to produce high-lead slag, crude lead and high-temperature SO 2 Flue gas dust, high temperature SO 2 After the flue gas and dust are discharged, they are cooled by the waste heat boiler (to 270-370°C) and then subjected to electric dust collection (both cooling ...

Embodiment 2

[0061] A method for enriching and recovering thallium from a lead smelting system, the method comprising the following steps:

[0062] (1) Thallium and cadmium soot is collected from the lead concentrate smelting system; the specific process is as follows:

[0063] A: Put lead concentrate and auxiliary materials (stone, limestone, crushed coal, coke, about 10% of the total amount of auxiliary materials) into the oxygen-enriched bottom-blown furnace, and then use an oxygen lance to blow in oxygen (oxygen pressure is 0.5-1.2MPa, oxygen The blowing volume is 90-130m per ton of the mixture of lead concentrate and auxiliary materials. 3 oxygen. ), heating and smelting, oxidation smelting and desulfurization at 950-1300°C to produce high-lead slag, crude lead and high-temperature SO 2 Flue gas dust, high temperature SO 2 After the flue gas and dust are discharged, they are cooled by the waste heat boiler (to 270-370°C) and then subjected to electric dust collection (both cooling ...

Embodiment 3

[0077] A method for enriching and recovering thallium from a lead smelting system, the method comprising the following steps:

[0078] (1) Thallium and cadmium soot is collected from the lead concentrate smelting system; the specific process is as follows:

[0079] A: Put lead concentrate and auxiliary materials (stone, limestone, crushed coal, coke, about 10% of the total amount of auxiliary materials) into the oxygen-enriched bottom-blown furnace, and then use an oxygen lance to blow in oxygen (oxygen pressure is 0.5-1.2MPa, oxygen The blowing volume is 90-130m per ton of the mixture of lead concentrate and auxiliary materials. 3 oxygen. ), heating and smelting, oxidation smelting and desulfurization at 950-1300°C to produce high-lead slag, crude lead and high-temperature SO 2 Flue gas dust, high temperature SO 2 After the flue gas and dust are discharged, they are cooled by the waste heat boiler (to 270-370°C) and then subjected to electric dust collection (both cooling ...

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Abstract

The invention discloses a method for enriching and recovering thallium from a lead smelting system. The method comprises the following steps of: collecting thallium-cadmium soot from a lead concentrate smelting system; leaching the obtained thallium-cadmium soot in water or dilute sulfuric acid, and collecting a leaching solution; carrying out primary replacement and secondary replacement on the collected leaching solution by using a metal monomer; carrying out standing oxidation on thallium-containing sponge cadmium obtained after secondary replacement, leaching by using a sodium carbonate solution after oxidation, and obtaining a thallium-rich leaching solution after leaching; and adjusting the pH value of the obtained thallium-rich leaching solution, and then carrying out replacement toobtain sponge thallium, thereby completing the enrichment of thallium. According to the method for enriching and recovering thallium from the lead smelting system, thallium in the lead concentrate smelting system is well enriched and recovered by using a simple and easy-to-operate method, no toxic or harmful reagent is used in the whole treatment process, the used reagent is non-toxic and low incost, the materials in the whole treatment process are well recycled and recovered, no waste is generated, and the production cost is further reduced. Moreover, thallium is well enriched and recovered. The method has outstanding social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and in particular relates to a method for enriching and recovering thallium from a lead smelting system. Background technique [0002] As a scattered metal, thallium has an extremely low content and scattered distribution on the surface of the earth. It is often associated with sulfur ores of metals such as lead, zinc, copper, and iron. Comprehensive recovery of copper and cadmium slag in the zinc hydrometallurgy process. Among them, the recovery from lead concentrate accounts for the majority, and the recovery process from lead sulfide concentrate mainly includes: lead sulfide concentrate is oxidized and reduced to produce thallium-containing dust, and then enriched by reverberatory furnace to form higher thallium-containing dust. Smoke and dust, in which thallium mainly exists in the form of thallium oxide, thallium trioxide and thallium sulfide; acid leaching is used to leac...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B17/00C22B61/00
CPCC22B7/006C22B7/007C22B17/04C22B61/00Y02P10/20
Inventor 李波李贵赵振波李利丽陈选元高冬生赵喜卢高杰李泽
Owner HENAN YUGUANG GOLD & LEAD
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