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A method for reducing and efficiently treating arsenic-containing soot

A reduction and high-efficiency technology, applied in the direction of improving process efficiency, can solve the problems of unrealized solid waste reduction treatment, increased toxic content, low arsenic recovery rate, etc. The effect of reducing the content and reducing the preservation content

Active Publication Date: 2020-06-30
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large molecular weight of iron arsenate and sodium arsenate, the solid content of the obtained product is still relatively high, even sometimes higher than that of untreated arsenic-containing soot. Iron arsenate and sodium arsenate can only be stacked for storage, which does not achieve the reduction of solid waste, but increases the content of toxic substances containing arsenic after treatment
while As 2 o 3 The preparation of products is difficult for raw materials with complex components, and the recovery rate of arsenic is low

Method used

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  • A method for reducing and efficiently treating arsenic-containing soot

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Effect test

Embodiment 1

[0038]A method for reducing and efficiently treating arsenic-containing soot according to an embodiment of the present invention, the process flow chart of the method is as follows figure 1 As shown, it specifically includes the following steps:

[0039] Take 50g of arsenic-containing soot (mass content: As 19.26%, Zn 7.42%, S 3.16%, Pb 19.88%, Cl 5.01%, In 1539g / t) for acid leaching. The acid leaching conditions are: the sulfuric acid concentration is 1.5mol / L, the temperature is 80°C, the stirring speed is 150rpm, and the leaching time is 2 hours. After the reaction is completed, the solid-liquid is separated to obtain the pickling solution and the pickling residue, and the arsenic, zinc and indium enter the pickling solution. The leaching rates of arsenic, zinc and indium were 98.35%, 93.57% and 92.48%, respectively.

[0040] Add 3g iron powder and 0.3g / L Cu to the pickling solution 2+ , the temperature is 80°C, the stirring speed is 150rpm, and the leaching time is 0.5 ...

Embodiment 2

[0043] A method for reducing and efficiently treating arsenic-containing soot according to an embodiment of the present invention, the process flow chart of the method is as follows figure 1 As shown, it specifically includes the following steps:

[0044] Take 50g of arsenic-containing soot (mass content: As 19.26%, Zn 7.42%, S 3.16%, Pb 19.88%, Cl 5.01%, In 1539g / t) for acid leaching. The acid leaching conditions are: the sulfuric acid concentration is 1.5mol / L, the temperature is 80°C, the stirring speed is 150rpm, and the leaching time is 2 hours. After the reaction is completed, the solid-liquid is separated to obtain the pickling solution and the pickling residue, and the arsenic, zinc and indium enter the pickling solution. The leaching rates of arsenic, zinc and indium were 98.35%, 93.57% and 92.48%, respectively.

[0045] Add 3g iron powder and 0.6g / L Cu to the pickling solution 2+ , the temperature is 80°C, the stirring speed is 150rpm, and the leaching time is 0.5...

Embodiment 3

[0048] A method for reducing and efficiently treating arsenic-containing soot according to an embodiment of the present invention, the process flow chart of the method is as follows figure 1 As shown, it specifically includes the following steps:

[0049] Take 50g of arsenic-containing soot (mass content: As 19.26%, Zn 7.42%, S 3.16%, Pb 19.88%, Cl5.01%, In1539g / t) for acid leaching. The acid leaching conditions are: the sulfuric acid concentration is 1.5mol / L, the temperature is 80°C, the stirring speed is 150rpm, and the leaching time is 2 hours. After the reaction is completed, the solid-liquid is separated to obtain the pickling solution and the pickling residue, and the arsenic, zinc and indium enter the pickling solution. The leaching rates of arsenic, zinc and indium were 98.35%, 93.57% and 92.48%, respectively.

[0050] Add 3g iron powder and 1g / L Cu to the pickling solution 2+ , the temperature is 80°C, the stirring speed is 150rpm, and the leaching time is 0.5 hou...

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Abstract

The invention discloses a reduction efficient treatment method for arsenious flue dust. The reduction efficient treatment method for the arsenious flue dust mainly includes following steps: (1) performing acid leaching on the arsenious flue dust so as to obtain an acid leaching solution and acid leaching slags; (2) using iron powder for reducing arsenic in the acid leaching solution step by step, using Cu2+ as an activating agent during the reduction process, and obtaining a filtrate and filter residues after reaction completes; (3) performing magnetic separating on the obtained filter residues, separating iron from the arsenic in the filter residues, and obtaining a high purity simple substance arsenic product. The reduction efficient treatment method for the arsenious flue dust first performs the acid leaching so as to enable the arsenic, zinc, indium and cadmium to enter the acid leaching solution, achieves separation of valuable metals of the arsenic, the zinc, the indium, the cadmium and the like from other metals, uses the iron powder for reducing the arsenic in the acid leaching solution into the single substance arsenic, and accordingly not only can effectively recycle the arsenic, but also can reduce preservation content of the arsenic in the arsenic product, and achieves reduction treatment of the arsenious flue dust. The reduction efficient treatment method for the arsenious flue dust is simple to operate, low in cost and high in efficiency.

Description

technical field [0001] The present invention relates to the technical field of hydrometallurgy, in particular, to a method for reducing and efficiently treating arsenic-containing soot, in particular to a comprehensive method for high-arsenic soot containing As, Zn, In, Cd, Pb and other valuable metals. Recycling method. Background technique [0002] Arsenic-containing soot, also known as white soot, is obtained from flue gas dust collection in the metal smelting process. It is a common solid waste in industry at present. It not only contains valuable metals such as Zn, In, Bi, Cd, and Pb, but also contains toxic Element As. Therefore, if the solid waste is not disposed of in time, it will not only cause waste of resources, but also seriously pollute the environment. [0003] A common treatment method for this solid waste is to use water leaching, acid leaching or alkali leaching to leach As, Zn, In, Bi, Cd, etc. in the soot into the solution. Valuable metals can be recyc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B30/04C22B13/00C22B19/30C22B19/20C22B58/00C22B17/00
CPCC22B7/007C22B7/02C22B13/045C22B17/04C22B19/22C22B19/30C22B30/04C22B58/00Y02P10/20
Inventor 李骞彭志平张雁雷日华邓永喜杨永斌徐斌姜涛李光辉李勇罗君李冬云陈许玲陈川陈卓悦俄立源韩雨琪董斯宇
Owner CENT SOUTH UNIV
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