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Permanent innocent treatment method of city life rubbish, industrial refuse and incineration fly ash

A technology for harmless treatment of municipal solid waste, applied in the direction of solid waste removal, can solve problems such as unsafety, high cost of fly ash recycling, environmental pollution, etc., to achieve thorough treatment, high added value of products, and no pollution The effect of secondary pollution

Inactive Publication Date: 2007-12-05
宜兴市张泽浇注耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the cost of recycling fly ash is too high, and the heavy metal ions in the fly ash after recycling will cause environmental pollution. As plastic fillers, heavy metals will return to the fly ash during the incineration of working waste and become dangerous substances again. Plastics filled with modified fly ash are easy to be used in daily necessities, bringing unsafety to people

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1, the permanent harmless treatment method of municipal solid waste, industrial waste incineration fly ash, adds sodium silicate, activated silica micropowder, kaolin in fly ash, sodium silicate, activated silica micropowder, kaolin Adding amounts are 8%, 3%, and 18% of the fly ash weight, add water and knead, solidify and dry until the moisture content is lower than 10%, and finally melt at high temperature, keep warm for 15 minutes and then cool, and the fly ash turns into dark glass.

Embodiment 2

[0009] Embodiment 2, the permanent and harmless treatment method of municipal solid waste and industrial waste incineration fly ash, adding potassium silicate, active silicon dioxide micropowder, kaolin with a low melting point below 1200 ° C, potassium silicate, active The amount of silicon dioxide micropowder and low-melting point kaolin is 6%, 5%, and 20% of the fly ash weight respectively, and mixed with water, fully stirred and mixed in a vacuum kneader for three to five minutes, and used after kneading It is extruded and solidified by a vacuum extruder, and then dried under natural conditions until the moisture content is lower than 10%. It is put into an electric furnace and melted at a high temperature of 1230°C. It is kept for 15 minutes and then cooled. The fly ash turns into dark glass.

Embodiment 3

[0010] Embodiment 3, the permanent harmless treatment method of municipal solid waste, industrial waste incineration fly ash, adds sodium silicate, activated silica micropowder, Yixing clay, sodium silicate, activated silica micropowder, Yixing The amount of clay added is 5%, 4%, and 15% of the weight of the fly ash, mixed with water, fully stirred and mixed in a vacuum kneader for three to five minutes, and extruded with a vacuum extruder after kneading It is solidified, then dried in an oven at 40-60°C until the moisture content is lower than 10%, put into an electric furnace and melted at a high temperature of 1250°C, and the fly ash melt is then produced by the spinning method to obtain silicate fibers.

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Abstract

The innocent process of treating fly ash from burning domestic garbage and industrial refuse permanently belongs to the field of environment protecting technology and hazardous waste stabilizing treatment technology. Fly ash is first mixed with soluble silicate in 5-8 wt% of the fly ash, fine active silica powder in 3-5 wt%, kaolin in 15-20 wt% and water; and the mixture is cured, dried to water content lower than 10 % and finally melted at high temperature. The innocent process is superior to other processes, and has the advantages of complete treatment, no secondary pollution, high value of the product and complete elimination of heavy metal harm.

Description

technical field [0001] The invention relates to a permanent harmless treatment method for incineration fly ash of urban living garbage, medical garbage and industrial garbage, and belongs to the technical field of environmental protection and hazardous waste stabilization treatment technology. Background technique [0002] Garbage incineration is a main means of dealing with municipal solid waste, medical waste, and industrial combustible waste. The incineration process will produce 3-5% of the waste as fly ash, which contains a large amount of lead, cadmium, copper, chromium, zinc, etc. Heavy metals are also rich in toxic substances such as dioxins and furans that are carcinogenic to the human body. The resource utilization of fly ash at home and abroad is concentrated on: the mixed use of fly ash and bottom slag as ecological cement, and the use of bottom ash fly slag as a substitute filler for cement concrete and asphalt concrete; It can be used as plastic filler after c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
Inventor 张伟良蒋群刚
Owner 宜兴市张泽浇注耐火材料有限公司
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