Clean production technological method and device for extracting arsenic

A clean production and equipment technology, applied in the field of environmental protection, can solve the problems that affect the sustainable and healthy development of the non-ferrous smelting industry, and the poor quality makes it difficult to continue to comprehensively utilize arsenic-containing hazardous waste, so as to achieve the effect of improving comprehensive economic and environmental benefits

Active Publication Date: 2017-05-31
JIANGSU CHENGTIAN ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology

Such process and equipment can ensure the application of non-ferrous metal mineral raw materials containing arsenic and the smooth progress of the process, but at the same time, a large amount of As, which contains sulfate and a small amount of dust, is produced in the process of quenching and collecting arsenic. 2 o 3 Hazardous arsenic wastes of poor quality that are difficult to continue to comprehensively utilize seriously affect the sustainable and healthy development of the nonferrous smelting industry

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  • Clean production technological method and device for extracting arsenic

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Embodiment Construction

[0022] The invention proposes a process method and a device for recovering arsenic from arsenic-containing nonferrous metal material or arsenic-containing nonferrous metal smelting flue gas through a continuous secondary arsenic extraction process.

[0023] Arsenic-containing non-ferrous metal materials are smelted or roasted in various forms of smelting furnaces or kilns, and arsenic sulfides or compounds are oxidized to As 2 o 3 Into the flue gas, while the flue gas also contains dust, SO 2 , SO 3 , CO, CO 2 , NO X and other gas components. After the high-temperature flue gas passes through the waste heat boiler to recover heat, and the electrostatic precipitator removes most of the dust, it is sprayed with an alkaline atomized solution through a quencher, and the flue gas is quenched to 110-170°C, and the As in the gas 2 o 3 solidifies as a solid, SO in gas 3 It is neutralized by alkaline substances into sulfate solids, part of the gas-solid mixture is collected from...

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Abstract

The invention discloses a clean production technological method and device for extracting arsenic. The method comprises the specific steps that the high-quality product As2O3 is recycled from arsenic-containing nonferrous metal materials or arsenic-containing nonferrous metal metallurgical off-gas through a continuous two-time arsenic purification technology, and the elementary substance arsenic or metal arsenic product is further reduced and produced; low-dew-point acid gas SO3 in flue gas is removed through a gas phase neutralization technology, a high-efficiency sinter-plate dust removing apparatus is adopted, and finally the cost spent by treating acid-containing and arsenic-containing waste water in a subsequent procedure is greatly reduced. The clean production technological method and device are the integrated arsenic recovery, purification, productization and harmless technology and equipment, and belongs to the typical clean production technology.

Description

technical field [0001] The invention belongs to the field of environmental protection, and specifically relates to a clean production process and equipment for extracting arsenic from arsenic-containing flue gas. Background technique [0002] In the smelting process of non-ferrous metal materials, some ores or materials contain high arsenic, and this part of arsenic will turn into arsenic oxide As during the smelting process of non-ferrous metal materials 2 o 3 At the same time, the smelting flue gas also contains dust, SO 2 , SO 3 , CO, CO 2 , NO X and other gas components. In order to be able to dispose of non-ferrous metal materials with high arsenic content, and at the same time take into account the smooth operation of the process, the current process of quenching arsenic collection is adopted, and at the same time, in order to eliminate the low dew point gas component SO 3 For the impact on the operation of the arsenic collection process, the method and equipment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/04C22B7/02
CPCC22B7/001C22B7/02C22B30/04
Inventor 花序
Owner JIANGSU CHENGTIAN ENVIRONMENTAL PROTECTION TECH CO LTD
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