Method and system for treating arsenic-containing metallurgical off-gas

A technology for smelting flue gas and treatment methods, which is applied in the field of smelting flue gas treatment, and can solve problems such as strong dust binding ability, high dust concentration, and bag corrosion

Active Publication Date: 2015-04-29
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

[0002] At present, the treatment of arsenic-containing smelting flue gas mainly adopts the method of collecting arsenic in cloth bags, but because smelting flue gas, especially smelting flue gas, has high dust concentration, large fluctuations in flue gas composition and concentration, strong dust binding ability, and sulfur in flue gas (especially sulfur trioxide) content is high, making it easy to cause bag corrosion and serious clogging when using bag arsenic collection treatment, and the treatment effect is not ideal
At the same time, arsenic and other metals wil

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  • Method and system for treating arsenic-containing metallurgical off-gas

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[0035] Generally, when smelting arsenic-containing concentrates, especially when smelting arsenic-containing concentrates, in order to control the stability of smelted products, the amount of arsenic-containing concentrates added will be adjusted, resulting in large fluctuations in smelting flue gas. And the smelting of arsenic-containing concentrates, especially the smelting, usually adopts oxygen-enriched smelting, and the content of water vapor and sulfur trioxide in the smelting flue gas produced is significantly higher than that of roasting flue gas or even higher than other smelting flue gases. Furthermore, the flue gas from copper concentrate smelting has the characteristics of high dust concentration, large fluctuations in flue gas composition and concentration, strong dust binding ability, and high sulfur (especially sulfur trioxide) content in the flue gas. It is difficult to deal with the smelting flue gas.

[0036] For this reason, the present invention proposes a ...

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Abstract

The invention discloses a method and a system for treating arsenic-containing metallurgical off-gas. The method comprises the following steps: smelting arsenic-containing concentrate to obtain a smelted product and the metallurgical off-gas; adopting sulfuric acid with a mass concentration of 55-63% to elute the metallurgical off-gas, so as to absorb arsenic oxide in the metallurgical off-gas; when the arsenic oxide is supersaturated and separated out, performing solid-liquid separation to the sulfuric acid containing arsenic oxide, so as to obtain arsenic oxide and the eluted sulfuric acid. The method disclosed by the embodiment of the invention can be used for treating the arsenic-containing metallurgical off-gas with high dust concentration, high smoke composition and concentration fluctuation, high dust cementation capacity, and high sulfur content in the off-gas, so as to improve the treatment effect in the prior art.

Description

technical field [0001] The invention belongs to the field of smelting flue gas treatment, in particular, the invention relates to a treatment method and system for arsenic-containing smelting flue gas. Background technique [0002] At present, the treatment of arsenic-containing smelting flue gas mainly adopts the method of collecting arsenic in cloth bags, but because smelting flue gas, especially smelting flue gas, has high dust concentration, large fluctuations in flue gas composition and concentration, strong dust binding ability, and sulfur in flue gas (especially sulfur trioxide) high content makes it easy to cause bag corrosion and serious clogging when using bag arsenic collection treatment, and the treatment effect is not ideal. At the same time, arsenic and other metals will be collected at the same time, which makes it difficult to separate arsenic. In order to solve the technical problem of difficult separation of arsenic in the method of bagging arsenic in the ...

Claims

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Application Information

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IPC IPC(8): B01D47/06
CPCB01D47/06
Inventor 董四禄尉克俭陈德喜魏甲明陈知若刘一鸣吕东杜士帽高飞肖万平李兵
Owner CHINA ENFI ENGINEERING CORPORATION
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