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A kind of industrial waste salt vitrification method

A technology of industrial waste salt and vitrification, which is applied to chemical instruments and methods, solid waste removal, transportation and packaging, etc., can solve the problem of ineffective treatment of industrial waste salt and coal gangue, and avoid dioxin poisonous gas Production, high degree of automation, good reliability

Active Publication Date: 2021-12-28
GO HIGHER ENVIRONMENT GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that cannot effectively process industrial waste salt and coal gangue, thereby providing a vitrification method for industrial waste salt

Method used

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  • A kind of industrial waste salt vitrification method
  • A kind of industrial waste salt vitrification method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take by weighing industrial waste salt, coal gangue (SiO 2 content is 50%) and additives (a mixture of calcium carbonate and sodium oxide with a mass ratio of 4:1), uniformly mixed by a mixer, and the particle size of industrial waste salt and coal gangue is 1-3mm; the mixture is fed into The pyrolysis furnace is cracked for 1.5 hours, and the temperature of the cracking furnace is controlled at 550°C; the mixture after cracking is sent to the melting furnace for melting for 1 hour, and the temperature of the melting furnace is controlled at 1200°C; the waste gas generated by the cracking furnace is discharged into the melting furnace for further treatment to avoid toxic gases such as dioxins The gas produced by the final melting furnace is treated by the tail gas treatment system and then discharged up to the standard. The molten slag liquid is discharged from the bottom of the furnace, and the glass body is obtained after natural cooling.

Embodiment 2

[0032] Take by weighing industrial waste salt and coal gangue (SiO 2 content is 60%), mixed evenly by a mixer, the particle size of industrial waste salt and coal gangue is 1-3mm; the mixture is sent to the cracking furnace for cracking for 1h, and the temperature of the cracking furnace is controlled at 600°C; the cracked mixture is sent to After melting in the melting furnace for 1.5 hours, the temperature of the melting furnace is controlled at 1150°C; the waste gas generated from the cracking furnace is discharged into the melting furnace for further treatment to avoid the generation of toxic gases such as dioxins, and finally the gas generated in the melting furnace is treated by the tail gas treatment system before being discharged up to the standard. The molten slag liquid is discharged from the bottom of the furnace, and the glass body is obtained after natural cooling.

Embodiment 3

[0034] Take by weighing industrial waste salt, coal gangue (SiO 2 content is 70%) and sodium sulfate, mixed uniformly by a mixer, the particle size of industrial waste salt and coal gangue is 1-3mm; the mixture is sent to cracking furnace for cracking 3h, and the temperature of cracking furnace is controlled at 450°C; after cracking The mixture is sent to the melting furnace for melting for 3 hours, and the temperature of the melting furnace is controlled at 1250°C; the waste gas generated by the cracking furnace is discharged into the melting furnace for further treatment to avoid the generation of toxic gases such as dioxins, and finally the gas generated by the melting furnace is treated by the tail gas treatment system and discharged up to the standard . The molten slag liquid is discharged from the bottom of the furnace, and the glass body is obtained after natural cooling.

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Abstract

The invention relates to a vitrification method of industrial waste salt, comprising the following steps: S1, uniformly mixing industrial waste salt and coal gangue to obtain a mixture; S2, cracking the mixture; and S3, melting the cracked material, A glassy slag is obtained. This method can transform industrial waste salt and coal gangue into a stable glass body by treating waste with waste, and the coal gangue contains a certain amount of combustibles, and the heat generation value is 4.18-12.56MJ / kg. The coal gangue is melted in the melting furnace Among them, the heat generated by spontaneous combustion can be provided by itself, thereby reducing the supply of external heat energy, and the coal gangue contains potassium oxide, sodium oxide, and calcium oxide, which can all play the role of flux and reduce the melting furnace required in the process of glass slag. actual temperature.

Description

technical field [0001] The invention relates to the technical field of hazardous waste disposal, in particular to a vitrification method for industrial waste salt. Background technique [0002] Industrial waste salt mainly refers to the by-product crystalline salts produced in industrial production. The main components are solid hazardous wastes of one or more inorganic salts such as sodium chloride, sodium sulfate, sodium sulfide, and calcium chloride. It contains a large amount of organic matter, which makes it have a strong pungent smell. It may also contain heavy metal ions, heteroatoms and other elements. It was included in the 2016 version of the "National Hazardous Waste List". [0003] Currently, landfill is the most commonly used disposal method for industrial waste salt. Existing waste salt and other soluble hazardous wastes are directly landfilled after curing with cement. For flexible landfills, waste salt is highly soluble and has a high possibility of leakage,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00
CPCB09B5/00B09B3/29
Inventor 陈福泰马建波刘兴甜刘海宁
Owner GO HIGHER ENVIRONMENT GRP CO LTD