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Method for harmless treatment of arsenic sulfide slag and polyethylene plastic

A polyethylene plastic, harmless treatment technology, applied in chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problem of destroying the properties of cement colloid, not suitable for harmless treatment, easy to absorb moisture and oxidize Decomposition and other problems, to achieve the effect of stable and harmless treatment, high curing efficiency, and stable properties of the cured body

Active Publication Date: 2022-01-21
YUNNAN CHIHONG ZINC & GERMANIUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, arsenic sulfide is very unstable in solution or in the air. It is easy to absorb moisture and oxidize and decompose. It is easy to react with calcium salt to form calcium arsenate, which can destroy the properties of cement colloid and prevent it from coagulating and hardening. Therefore, it is not suitable for direct cement colloid. Harmless treatment with cement solidification

Method used

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  • Method for harmless treatment of arsenic sulfide slag and polyethylene plastic
  • Method for harmless treatment of arsenic sulfide slag and polyethylene plastic
  • Method for harmless treatment of arsenic sulfide slag and polyethylene plastic

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Take 333g of polyethylene plastic, heat it until it is completely melted (200°C), take 66.7g of arsenic sulfide slag, add it to the molten polyethylene plastic liquid, stir, cool down, and continue stirring until particles are formed (polyethylene plastic: arsenic sulfide slag=100 :20).

[0029] Weigh 100g each of polyethylene plastic arsenic sulfide particles, mix with 200g cement (425#), let it stand for 28 days, and test the leaching concentration of arsenic according to the national standard (HJ 557-2010). The leaching concentration of arsenic is 0.344mg / L, to meet the emission standards stipulated by the state.

Embodiment 2

[0031] Take 200g of polyethylene plastic, heat it until it is completely melted (350°C), take 200g of arsenic sulfide slag, add it to the molten polyethylene plastic liquid, stir, cool down, and continue stirring until particles are formed (polyethylene plastic: arsenic sulfide slag = 100: 100).

[0032] Weigh 100g of polyethylene plastic arsenic sulfide particles, mix them with 60g of cement (425#), let them stand for 28 days, and test the leaching concentration of arsenic according to the national standard (HJ 557-2010). The leaching concentration of arsenic is 0.805mg / L , to meet the national emission standards.

[0033] The invention utilizes the characteristics of low softening point of polyethylene plastic and good fluidity after melting, mixes polyethylene plastic with arsenic sulfide slag, calcium arsenate slag, water crushed slag and their mixture, and then cools to make polyethylene plastic arsenic Slag particles, the arsenic sulfide slag is wrapped by polyethylene ...

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Abstract

The invention relates to a method for harmless treatment of arsenic sulfide slag and polyethylene plastic and belongs to the field of solid waste treatment. The method comprises the steps that the polyethylene plastic is melted at the temperature of 80-200 DEG C, the arsenic sulfide slag is added, a stirring is performed to make particles, and then the arsenic slag particles are solidified with cement to be made into a solidified body. The method is simple and easy to operate. According to the method for wrapping the arsenic slag with the polyethylene plastic, the activity of the arsenic slag is reduced, and then treatment is performed with a cement solidification method. The method has the advantages of being easy to operate, high in solidification efficiency and stable in solidified body property, the solidification performance of cement is not affected through cement solidifying treatment, the arsenic leaching concentration of the solidified body reaches the national specified emission standard, and the method is an ideal arsenic slag harmless treatment method.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a harmless treatment method for arsenic sulfide slag polyethylene plastic. Background technique [0002] Heavy metal ores in non-ferrous metals generally have polymetallic symbiosis, among which lead, zinc, copper, and tin are rich in harmful substances such as arsenic and sulfur. During the smelting process of non-ferrous metals, sulfur is collected through acid production and the control of sulfur pollution is realized. . The waste water produced by acid production contains high levels of toxic arsenic, which poses a great threat to people's production and life. For the treatment of arsenic in sewage acid water, lime method, lime iron salt method and sulfuration method are generally used. The vulcanization method has the advantages of high arsenic removal efficiency and less slag, and is widely used. However, the arsenic sulfide filter cake produced by the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/27B09B3/38B09B3/40B09B5/00
CPCB09B3/00B09B5/00B29B17/0026Y02W30/62
Inventor 马雁鸿贾著红卢文鹏李瑞冰裴启飞杨大锦李衍林单祖宇何宗云张候文肖宜彬吴楠庞博张启旭姚智馨王振威张吉祥于三三李双明
Owner YUNNAN CHIHONG ZINC & GERMANIUM