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Safety treatment method for fluorine-containing solid waste

A disposal method and technology for solid waste residues, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of high fluoride ion content and high unit treatment cost, etc.

Active Publication Date: 2015-12-09
韩素梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the problem that the fluorine-containing solid waste residue in the prior art has high fluoride ion content after pretreatment before landfill and the unit treatment cost is expensive, and then proposes a safe disposal of fluorine-containing solid waste residue method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Add 10Kg calcium chloride to 100Kg fluorine-containing solid waste residue, stir and mix evenly to form mixture A1;

[0026] (2) Add 8Kg of sulphoaluminate cement to the above mixture A1, stir and mix evenly to form mixture B1;

[0027] (3) Landfill the mixture B1 in step (2).

Embodiment 2

[0029] (1) Add 20Kg of calcium hydroxide to 100Kg of fluorine-containing solid waste residue, stir and mix evenly to form mixture A2;

[0030] (2) Add 5Kg of fluoroaluminate cement to the above mixture A2, stir and mix evenly to form mixture B2;

[0031] (3) Place the mixture B2 in step (2) in an open container, apply a pressure of 50KN for mechanical compaction, and then landfill.

Embodiment 3

[0033] (1) Add 50Kg of calcium oxide to 100Kg of fluorine-containing solid waste residue, stir and mix evenly to form mixture A3;

[0034](2) Add 10Kg of Portland cement to the mixture A3, and stir and mix evenly to form the mixture B3;

[0035] (3) Spray 1Kg of water to the mixture B3 in step (2) and mix it evenly, then place the above-mentioned mixture in an open container and apply a pressure of 50KN for mechanical compaction, and then landfill.

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PUM

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Abstract

The invention relates to a safety treatment method for fluorine-containing solid waste. According to the method, a calcium compound is added into the fluorine-containing solid waste, and a composition fluorine ions in the fluorine-containing solid waste and calcium ions in the calcium compound form a water-insoluble compound calcium fluoride, so that free fluorine ions in the fluorine-containing solid waste are greatly reduced, and the phenomenon that the fluorine ion content of the fluorine-containing solid waste is large and the fluorine-containing solid waste is easily dissolved in soil and groundwater to cause pollution in the prior art is avoided; a curing agent is added to achieve the effect of bonding the fluorine-containing solid waste, and meanwhile, a layer of low-permeability substance is formed on the surface of the fluorine-containing solid waste to limit the transfer of harmful compositions, mainly the fluorine ions, in the fluorine-containing solid waste, so that soil and underground pollution is also avoided.

Description

technical field [0001] The invention belongs to the field of solid waste pretreatment, and in particular relates to a safe disposal method of fluorine-containing solid waste residue. Background technique [0002] In industrial production, especially metallurgical industrial production and various mining production, various fluorine-containing solid / liquid hazardous wastes are inevitably produced while producing various products. How to deal with the environmental protection of these various fluorine-containing solid / liquid hazardous wastes whose fluorine content seriously exceeds the standard is the top priority of the enterprise. [0003] For example, in the production process of electrolytic aluminum plants, it is inevitable to produce a large amount of solid waste residue, especially in the process of overhaul, a large amount of waste residues such as spent cathodes and anode carbon blocks containing fluorine will be generated. According to the relevant standards of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B28/04C04B28/34C04B18/04
CPCY02W30/91
Inventor 韩素梅张子硕邓桂林韩玉玺李茹雪
Owner 韩素梅
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