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Method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting

A technology of collaborative processing and materials, applied in the direction of improving process efficiency, etc., can solve the problems of secondary resource utilization of unfavorable tailings, serious environmental pollution, poor arsenic removal effect, etc., to increase processing costs, prevent environmental pollution, The effect of simple process

Active Publication Date: 2022-07-08
红河砷业有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting to solve the problem in the prior art that the purpose of co-processing sulfur-containing and arsenic-containing materials with arsenic-containing metal oxides is to remove arsenic, and the main process is pyrotechnics. , the loss of sulfur cannot be avoided, and the effect of arsenic removal is not good, the environment is seriously polluted, there are great safety hazards in industrial production, and it is not conducive to the technical problem of secondary resource utilization of treated tailings

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  • Method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting
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  • Method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting

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example 1

[0089] A method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting. The arsenic sulfide slag and smelting smoke come from a smelting company in Yunnan. The arsenic sulfide slag contains 25% of S and 38% of As in the arsenic sulfide slag.

[0090] The raw materials are put into the preheated low-temperature pyrolysis furnace 114 through the closed raw material feeding mechanism, heated to 400° C., and kept for 90 minutes, and nitrogen gas is introduced into the low-temperature pyrolysis furnace 114 at the same time, and the sulfur in the material is in the form of metal sulfides. The form remains in the material, and arsenic enters the high temperature gas-solid separation tower 131 in the form of gaseous arsenic trioxide;

[0091] The solid sulfur material is directly sent to the preheated external heat type high temperature pyrolysis furnace 122, heated to 600 ° C, and kept for 90 minutes. , feeding nitrogen gas and adding carbon powder ...

example 2

[0096] A method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting. Arsenic sulfide slag and smelting smoke come from a smelting company in Yunnan. The arsenic sulfide slag contains 20% of S and 33% of As in the arsenic sulfide slag.

[0097] The raw material is put into the preheated low-temperature pyrolysis furnace 114 through the closed raw material feeding mechanism, heated to 300 ° C, and kept for 60 minutes, and nitrogen is introduced into the low-temperature pyrolysis furnace 114 at the same time, and the sulfur in the material is in the form of metal sulfide. The form remains in the material, and arsenic enters the high temperature gas-solid separation tower 131 in the form of gaseous arsenic trioxide;

[0098] The solid sulfur material is directly sent to the preheated external heat type high temperature pyrolysis furnace 122, heated to 700 ° C, and kept for 60 minutes, and the original solid arsenic trioxide in the material is h...

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Abstract

The invention provides a method for synergistic processing and utilization of arsenic-containing materials in non-ferrous smelting, wherein the arsenic sulfide in the arsenic sulfide slag in the low-temperature inner cylinder generates solid metal sulfide and gaseous arsenic trioxide. The smelting fumes in the high-temperature inner cylinder or the solid arsenic trioxide in the oxidized metal ore powder are heated to a gaseous state. The low temperature inner cylinder and the high temperature inner cylinder are infinitely close to the oxygen-free atmosphere, and the carbon powder is input into the high temperature inner cylinder. The method for synergistic treatment and utilization of arsenic-containing materials in non-ferrous smelting of the present invention can synergistically process various materials, remove arsenic and solidify sulfur, and the valuable metals in the reactants can be appreciated through vulcanization, and the sulfur in them is retained, which is beneficial to Subsequent fire smelting; compared with traditional furnace types such as fluidized bed, blast furnace and reverberatory furnace, its flue gas volume is extremely small, sulfur loss is small, and secondary pollution is low; it has strong adaptability and can be adjusted according to different non-ferrous metal smelting products. The process parameters and material addition ratio have good results, the process flow is simple, and it can be industrialized and processed on a large scale.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for co-processing and utilization of arsenic-containing materials in non-ferrous smelting. Background technique [0002] In industrial production, the arsenic sulfide slag will be stacked together for centralized treatment after it is formed. The main component of arsenic sulfide slag is As 2 S 3 , the commonly used treatment methods are divided into fire method and wet method. The fire method is mainly roasting method, and the wet method mainly includes alkali leaching method, ferric sulfate leaching method and copper sulfate replacement method. Fire method: The recovery rate of arsenic is low, which is easy to cause environmental pollution and poor product quality. Alkaline leaching method: the amount of sodium hydroxide is large, and the operating cost is high; ferric sulfate leaching method: the process is more complicated, the material is returned ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B30/04
CPCC22B30/04Y02P10/20
Inventor 张洪文岳雄段铭诚李鹏谢高理刘新阳吕黎明王丽娟
Owner 红河砷业有限责任公司
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