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Equipment for directly producing arsenic by utilizing high-arsenic dust and production method

An arsenic fume and direct technology is applied to the equipment and production field for directly producing arsenic by using high arsenic fume and dust, which can solve the problems of difficult to achieve clean and safe production, use of hazardous chemicals, long process flow, etc. Injury of toxic substances, effect of short process flow

Pending Publication Date: 2018-03-09
红河砷业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon reduction method is the mainstream preparation method at present. Its process is long, and most of them have disadvantages such as the production is not sealed, some processes use dangerous chemicals, and it is difficult to achieve clean and safe production.

Method used

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  • Equipment for directly producing arsenic by utilizing high-arsenic dust and production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Using arsenic-containing tin fumes as raw materials (the main element content is As60%, Sn5%, Pb1.17%), the temperature of the DC furnace is controlled at 1200 ° C ± 50 ° C, and the control furnace pressure parameters are: -20 ~ -10Pa, can get the content of Tin slag with arsenic content less than 4%, the tin content in the slag is higher than 8%, the direct recovery rate of tin is higher than 80%, the grade of diarsenic trioxide is above 95%, the temperature of the deoxidation device is controlled at 700-800°C, and the reduction-condensation metal arsenic is integrated The temperature of the chemical device is controlled at 800°C±50°C, and the obtained metal arsenic product contains 99.94% arsenic.

Embodiment 2

[0030] Using arsenic-containing tin fumes as raw materials (the main element content is As55%, Sn6%, Pb2.36%), the temperature of the DC furnace is controlled at 1000°C±100°C, and the control furnace pressure parameters are: -5~0Pa, and the arsenic-containing The amount of tin slag is less than 4%, the tin content in the slag is higher than 8%, the direct recovery rate of tin is higher than 80%, the grade of diarsenic trioxide is above 95%, the temperature of the deoxidation device is controlled at 700-800°C, and the reduction and condensation of metal arsenic are integrated The temperature of the device is controlled at 700°C±50°C, and the obtained metal arsenic product contains 99.94% arsenic.

Embodiment 3

[0032] Using white smoke as raw material (the main element content is As40%, Cu6%, Pb7%, Zn5%), the temperature of the DC furnace is controlled at 1300°C ± 50°C, and the control furnace pressure parameter is: -5 ~ 0Pa, the arsenic content can be obtained Less than 4% copper slag, the copper content in the slag is higher than 10%, the direct recovery rate of copper is higher than 80%, the grade of diarsenic trioxide is above 95%, the temperature of the deoxidation device is controlled at 700-800°C, and the reduction-condensation metal arsenic integrated device The temperature is controlled at 750°C±50°C, and the obtained metal arsenic product contains 99.91% arsenic.

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Abstract

The invention discloses equipment for directly producing arsenic by utilizing high-arsenic dust and a production method. The equipment comprises a closed direct current furnace (2), a closed deoxidizing device (3) and a closed arsenic reduction-condensation integrated device (4) connected in sequence by virtue of pipelines, as well as a screw feeding device (1) communicated with the interior of the direct current furnace, wherein the deoxidizing device (3) is characterized in that a carbon powder layer (5) is arranged in a deoxidizing tank; the arsenic reduction-condensation integrated device(4) comprises a tank body, a reduced carbon layer (6) arranged in the tank body, and a condensation cover (7) arranged on the top of the tank body; two ends of a first connecting pipe (8) are respectively communicated with the top of the direct current furnace and the lower part of the deoxidizing device; and a second connecting pipe (9) is communicated with the top of the deoxidizing device and the lower part of the arsenic reduction-condensation integrated device. The equipment disclosed by the invention is capable of producing arsenic in a fully closed environment, and is safe, reliable, high in yield, simple and low in investment.

Description

technical field [0001] The invention relates to the technical field of equipment and methods for directly producing arsenic by using arsenic-containing fumes produced in nonferrous metal smelting. Background technique [0002] At present, the preparation method of arsenic is mainly to firstly produce arsenic trioxide intermediate product by reverberatory furnace, and then use arsenic trioxide as raw material to prepare arsenic by hydrogen reduction method, thermal decomposition method or carbon reduction method. [0003] The process of using the reverberatory furnace to produce the intermediate product of arsenic trioxide is to volatilize the arsenic trioxide in the reverberatory furnace by heating the arsenic-containing fume to a high temperature of 800°C to 1000°C, so that the arsenic trioxide in the raw material volatilizes into the flue gas of the volatilization furnace, and the flue gas is condensed and settled , and then through the bag bag dust collector to obtain ars...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B30/04
CPCC22B7/001C22B7/02C22B30/04Y02P10/20
Inventor 张振华张敏刘新阳张有才
Owner 红河砷业有限责任公司
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