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A synchronous processing method for detoxification and recycling of high arsenic soot

A synchronous processing and resource-based technology, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of difficult process control, poor operability, and difficult large-scale utilization, and achieve simple operation and short process Effect

Active Publication Date: 2022-07-15
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention is mainly aimed at the synthesis of a small amount of aluminum arsenide, which requires a harsh experimental environment. At the same time, the vapor deposition equipment is expensive, and it is difficult to use it in the industry on a large scale.
[0005] CN 108060454A discloses a device and method for preparing gallium arsenide crystals by the VGF method. The device for preparing gallium arsenide crystals by the VGF method improves the structure of the quartz tube, reduces primary sealing, and improves the service life of the PBN crucible, but the invention involves The experimental device obtained is complicated, the operability is poor, and the process is difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The arsenic content of 8wt% of copper smelting high-arsenic soot (calculated as arsenic trioxide), copper sulfide and copper oxide in a molar ratio of 1:2:1 is mixed, and placed in a zirconia-lined ball mill tank for mixed ball milling, wherein The mass ratio of balls to material is 20:1, the material of the grinding ball is zirconia, the size of the grinding ball is 5mm, the rotation speed is 300 / min, and the time is 36h; the mixed powder after ball milling is pressed into tablets, and the pressure is 20MPa; Put it into a quartz boat and sintered at high temperature in an argon atmosphere. The heating rate is 10°C / min, the temperature is 500°C, the holding time is 120min, and the cooling rate is 8°C / min. 3 In the form of As, the loss rate of arsenic is less than or equal to 4%. The gas generated in the reaction is catalyzed by vanadium pentoxide into sodium hydroxide solution, and distilled to obtain sodium sulfate.

Embodiment 2

[0028] The arsenic content of 13wt% copper smelting high arsenic soot (calculated as arsenic pentoxide), pyrite (calculated as ferrous disulfide), elemental iron in a molar ratio of 1:2.5:1.5 was mixed and placed in stainless steel Mixing ball milling is carried out in the lined ball milling tank, the mass ratio of ball to material is 15:1, the grinding ball material is stainless steel, the grinding ball size is 3 mm, the rotation speed is 280 / min, and the time is 24 h; the mixed powder after mixing ball milling is pressed into tablets , the pressure is 15MPa; the tablet is placed in a quartz boat, and sintered at high temperature in a nitrogen atmosphere. Arsenic is all in iron arsenide Fe 2 In the form of As and FeAs, the loss rate of arsenic is less than or equal to 5%. The gas generated in the reaction is catalyzed by vanadium pentoxide and introduced into the calcium hydroxide solution, and the calcium sulfate is obtained by distillation.

Embodiment 3

[0030] The arsenic content of 10wt% of copper smelting high-arsenic soot (calculated as arsenic trioxide), copper sulfide ore (calculated as copper sulfide) and elemental copper in a molar ratio of 1:1.5:4.5 was mixed, and placed in a ball mill lined with zirconia Mixing ball milling is carried out in the tank, the mass ratio of ball to material is 25:1, the material of the grinding ball is zirconia, the size of the grinding ball is 8 mm, the speed is 320 / min, and the time is 48 h; 25MPa; put the tablet into a quartz boat, sintered at high temperature in an argon atmosphere, the heating rate is 15°C / min, the temperature is 600°C, the holding time is 150min, and the cooling rate is 10°C / min. All in Cu 3 In the form of As, the loss rate of arsenic is less than or equal to 3%. The gas generated in the reaction is catalyzed by vanadium pentoxide into potassium hydroxide solution, and then distilled to obtain potassium sulfate.

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Abstract

The invention discloses a simultaneous treatment method for detoxification and resource utilization of high-arsenic soot. In an inert atmosphere, high-arsenic soot, MeS source and hot flux Me or MeO are mixed and ball-milled first, and then sintered at high temperature to obtain MeAs product. Me is the metallic element copper, iron, zinc or aluminum. The method of the invention is simple in operation and short in process, can realize detoxification and resource utilization of high-arsenic soot in one step, and provides a new route for preparing metal arsenic alloy products.

Description

technical field [0001] The invention belongs to the technical field of arsenic-containing soot disposal, and in particular relates to a synchronous processing method for detoxification and resource utilization of high-arsenic soot. Background technique [0002] In the smelting process, various hazardous wastes, including arsenic soot, contain a large amount of arsenic oxide, which is extremely toxic and dangerous. The conventional method is to remove or recover arsenic by roasting or leaching. Although the roasting method has a large processing capacity, it has disadvantages such as serious environmental pollution and difficult process control. Although wet leaching has low energy consumption and is easy to operate, the process is often long, and the generated wastewater still needs further disposal. In addition, the biggest problem of the traditional method is that a large amount of waste residues such as iron arsenate and calcium arsenate are produced after arsenic treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B30/04C01D5/00C01F11/46
CPCC22B7/001C22B7/02C22B30/04C01D5/00C01F11/46Y02P10/20
Inventor 梁彦杰柴立元王广君廖小荃周元柯勇赵飞平符志坚沈建军李夏
Owner CENT SOUTH UNIV
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