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Metallurgy sintering processing method for urban domestic garbage incineration flyash

A technology for municipal solid waste and fly ash incineration, which is applied in the fields of environmental protection and metallurgical engineering, can solve the problems of high cost of fly ash resource, low added value of fly ash resource products, unsuitable for mass production, etc. resources, significant economic, social and environmental benefits, and the effect of easy storage and transportation

Inactive Publication Date: 2011-06-08
CHONGQING KELVWEI TECH EXPLOITURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these recycling treatments failed to solve practical engineering problems: 1) The leaching of heavy metal ions in fly ash after recycling is always a concern; 2) The cost of recycling fly ash is too high to be suitable for mass production; 3) Fly ash The added value of resource products is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Mixed granulation: The weight ratio of materials is: 70% iron ore powder, 9% blast furnace gas ash, 3% slaked lime, 15% garbage fly ash, 3% binder, and an appropriate amount of water. Mix well, use pelletizing equipment to make 5-12mm pellets, and keep at room temperature for 20 hours.

[0022] (2) Sintering mixture: 67.8% of iron ore powder, 4.5% of quicklime, 1% of limestone, 1.5% of calcined dolomite, 4.2% of coal powder, 10% of returned ore, 1% of rolled steel skin and the preparation in step (1) 10% of the obtained pellets were mixed together to obtain a sintered mixture.

[0023] (3) Sintering: spread the sintering mixture in step (2) on the trolley of the sintering machine for sintering, and detect various performance indexes of the sintered ore. Among them, the thickness of the paving material layer is 700mm, and the sintering ignition temperature is 1100°C.

[0024] The sintering test shows that compared with the sinter mixture sinter without waste incine...

Embodiment 2

[0026] (1) Mixed granulation: The weight ratio of granulation materials is iron ore powder 15.5%, blast furnace gas ash 20%, converter dust sludge 22%, sulfuric acid slag 25%, limestone powder 2%, slaked lime 4.5%, garbage fly ash 5% %, 4% binder, 0.5% stabilizer, mixed with appropriate amount of water, made into 5-12mm pellets by pelletizing equipment, and cured at room temperature for 10-24 hours.

[0027] (2) Sintering mixture: 73.2% of iron ore powder, 5% of quicklime, 1% of limestone, 4.2% of coal powder, 15% of returned ore, 1% of rolled steel skin and 8% of pellets made in step (1) Mix together to obtain a sintered mixture.

[0028] (3) Sintering: spread the sintering mixture in step (2) on the trolley of the sintering machine for sintering, and detect various performance indexes of the sintered ore. Among them, the thickness of the paving material layer is 600mm, and the sintering ignition temperature is 1080°C.

[0029] The sintering experiments show that, compared ...

Embodiment 3

[0031] (1) Mixed granulation: granulation material ratio: blast furnace gas ash 25%, converter dust sludge 25%, sulfuric acid slag 30%, limestone powder 5%, slaked lime 2.7%, garbage fly ash 3%, binder 3.5% , 0.3% stabilizer, mixed with an appropriate amount of water, made into 5-8mm pellets with pelletizing equipment, and cured at room temperature for 20 hours.

[0032] (2) sintering mixture: iron ore powder 63.0%, slaked lime 4.2%, limestone 2%, coal dust 3.8%, return ore 12%, and the bead 15% that makes in the step (1) are mixed together, A sintered mixture is obtained.

[0033] (3) Sintering: spread the sintering mixture in step (2) on the trolley of the sintering machine for sintering, and detect various performance indexes of the sintered ore. Among them, the thickness of the paving material layer is 650mm, and the sintering ignition temperature is 1120°C.

[0034] The sintering test shows that the metallurgical properties of the sintered ore are not lower than those o...

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Abstract

The invention provides a metallurgy sintering method for processing urban domestic garbage incineration flying ash. The method comprises steps of (1) mixing garbage flying ash with a weight ratio of 3%-15%, adhesive of 3%-5%, fixedness agent of 0-1%, iron-bearing materials of the rest and suitable amount of water, and making iron-bearing globules of 5-12 mm by using a pellet fabrication apparatus; (2) mixing the obtained iron-bearing globules, the iron ore powder, a fusing agent, the fuel, the returning ore and the like to obtain a mix for sintering; (3) spreading the obtained mix for sintering on a sintering machine for sintering and obtaining a sintered ore suitable for smelting; (4) transferring the sintered ore as ironmaking raw materials to a blast furnace for smelting.According to the components of the garbage incineration flying ash of which the proportion is about 1%-15% in the sintered ore, after sintering, the quality of the sintered ore satisfies the requirement of production and will not generate any environmental pollution, harm of the garbage incineration flying ash can be eliminated completely, therefore, innocent treatment of garbage incineration flying ash can be realized.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and metallurgical engineering, and in particular relates to a method for harmlessly treating fly ash from municipal solid waste incineration. Background technique [0002] With the development of the economy, the expansion of the city and the increase of the population, the sharp increase in the output of urban domestic waste has brought a series of problems that plague the human society, such as occupying land, causing soil, water and ecological pollution, causing serious social problems and economic question. Incineration can minimize the amount of final disposal of garbage, thermally decompose and make the pollutants in the garbage harmless, and make full use of the heat energy in it. However, inorganic slag and fly ash will inevitably be produced during the garbage incineration process. bring about new environmental problems. The incineration method is currently one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/22C22B1/242C22B1/248
Inventor 刘清才魏媛文娟陈耀华
Owner CHONGQING KELVWEI TECH EXPLOITURE
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