Synergistic treatment and utilization method for non-ferrous smelting arsenic-containing materials

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: 2021-12-31
红河砷业有限责任公司 +1
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  • Abstract
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  • 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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  • Synergistic treatment and utilization method for non-ferrous smelting arsenic-containing materials
  • Synergistic treatment and utilization method for non-ferrous smelting arsenic-containing materials
  • Synergistic treatment and utilization method for non-ferrous smelting arsenic-containing materials

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example 1

[0089] A method for collaborative processing and utilization of arsenic-containing materials in non-ferrous smelting. The arsenic sulfide slag and smelting fume are from a smelting company in Yunnan. The arsenic sulfide slag contains 25% S and 38% As in mass percentage.

[0090] Put the raw material into the preheated low-temperature pyrolysis furnace 114 through the closed raw material feeding mechanism, heat it to 400°C, and keep it warm for 90 minutes. At the same time, feed nitrogen into the low-temperature pyrolysis furnace 114. The form remains in the material, and the arsenic enters the high-temperature gas-solid separation tower 131 in the form of gaseous arsenic trioxide;

[0091] Send the sulfur-fixed material directly into the preheated external heating high-temperature pyrolysis furnace 122, heat it to 600°C, and keep it warm for 90 minutes. After heating, the original solid arsenic trioxide in the material enters the high-temperature gas-solid separation tower 131 ...

example 2

[0096] A method for the coordinated treatment and utilization of arsenic-containing materials in non-ferrous smelting. The arsenic sulfide slag and smelting smoke are from a smelting company in Yunnan. The arsenic sulfide slag contains 20% S and 33% As by mass percentage.

[0097] The raw materials are 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. At the same time, nitrogen gas is introduced into the low-temperature pyrolysis furnace 114. The form remains in the material, and the arsenic enters the high-temperature gas-solid separation tower 131 in the form of gaseous arsenic trioxide;

[0098] Send the sulfur-fixed material directly into the preheated externally heated high-temperature pyrolysis furnace 122, heat it to 700°C, and keep it warm for 60 minutes. After heating, the original solid arsenic trioxide in the material enters the high-temperature gas-solid separatio...

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Abstract

The invention provides a synergistic treatment and utilization method for non-ferrous smelting arsenic-containing materials. According to the method, arsenic sulfide in arsenic sulfide slag in a low-temperature inner cylinder generates solid metal sulfide and gaseous arsenic trioxide; solid arsenic trioxide in smelting smoke dust or oxidized metal mineral powder in a high-temperature inner cylinder is heated to be in a gaseous state; and the low-temperature inner cylinder and the high-temperature inner cylinder are infinitely close to an oxygen-free atmosphere, and carbon powder is input into the high-temperature inner cylinder. The synergistic treatment and utilization method for the non-ferrous smelting arsenic-containing materials has the advantage that various materials are subjected to synergistic treatment, arsenic removal and sulfur fixation, valuable metals in reactants are increased in value through a vulcanization mode, in addition, sulfur in the reactants is reserved, and subsequent pyrometallurgy is facilitated; compared with traditional furnaces such as fluidized beds, blast furnaces and reverberatory furnaces, the flue gas amount is extremely small, sulfur loss is small, and secondary pollution is low; and the adaptability is high, corresponding technological parameters and material adding proportions can be adjusted according to different non-ferrous metal smelting products, the effect is good, the technological process is simple, and industrial large-scale treatment can be realized.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment, in particular to a method for coordinated treatment and utilization of arsenic-containing materials in nonferrous smelting. Background technique [0002] In industrial production, arsenic sulfide slag will be piled together for centralized treatment after it is generated. 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, it is easy to cause environmental pollution, and the product quality is poor. Alkali leaching method: the amount of sodium hydroxide is large, and the operating cost is high; ferric sulfate leaching method: the process is more complicated, there are more mat...

Claims

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Application Information

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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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