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Method for producing alinite cement by utilizing municipal solid waste incinerator fly ash

A technology of waste incineration fly ash and alnit, applied in cement production, clinker production, etc., to achieve huge social benefits, reduce consumption, and reduce additional disposal costs

Inactive Publication Date: 2010-06-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the resource utilization of ash produced by waste incineration has been in the United States, Japan and Europe for decades, but fly ash is generally sent directly to landfill after stabilization treatment, and its resource utilization is still in the experimental stage

Method used

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  • Method for producing alinite cement by utilizing municipal solid waste incinerator fly ash
  • Method for producing alinite cement by utilizing municipal solid waste incinerator fly ash
  • Method for producing alinite cement by utilizing municipal solid waste incinerator fly ash

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Embodiment

[0033] The main raw material waste incineration fly ash used in the test comes from Suzhou Waste Incineration Plant, with an average particle size of 11.25um and a moisture content of 1.5%. The main components of other raw materials such as fly ash and limestone are shown in Table 4. Grind the prepared raw meal to the same fineness as ordinary portland cement raw meal, then calcinate at 1200°C, heat it for 60 minutes, quench it and grind it until it passes through a 200-mesh sieve. The cement properties are shown in Table 5.

[0034] Table 4 main raw material chemical composition (wt.%)

[0035]

[0036]Choose three formulas (mass percentage) of burning Alinite cement clinker:

[0037] ① Waste incineration fly ash: 25%; fly ash: 6%; limestone: 60%; calcium chloride: 9%;

[0038] ②Waste incineration fly ash: 30%; fly ash: 10%; limestone: 55%; calcium chloride: 5%;

[0039] ③ Waste incineration fly ash: 40%; fly ash: 12%; limestone: 45%; calcium chloride: 3%.

[0040] The...

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Abstract

The invention relates to a method for producing alinite cement by utilizing municipal solid waste incinerator fly ash. The method includes that solid waste incinerator fly ash is taken as main raw material, the raw materials including 25-40wt% of solid waste incinerator fly ash, 17-20wt% of limestone, 3-5wt% of coal ash and 3-9wt% of calcium chloride are mixed, ground into powder and made into pat, the pat is placed into a high temperature furnace and heated to 1200 DEG C, heat preservation is carried out for a period of time, and then the pat is taken out and quenched to room temperature, thus obtaining the alinite cement clinker. Compared with the prior art, the invention has the advantages of energy conservation and emission reduction as well as huge social benefit, economic benefit and environmental protection benefit.

Description

technical field [0001] The invention relates to a method for preparing cement, in particular to a method for producing Alignite cement by utilizing urban waste incineration fly ash. Background technique [0002] With the rapid development of urban construction and rapid population growth, the discharge of municipal solid waste is also increasing sharply, and its composition is becoming more and more complex. Taking domestic waste as an example, the national urban domestic waste removal volume was only 53.98 million tons in 1987, and it soared to 120 million tons in 1997. In 2002, my country's urban waste has reached more than 150 million tons, and the annual rate is 8% to 10%. The speed is increasing, and it is estimated that by 2010, the annual discharge of municipal solid waste in my country will reach 210 million tons. These wastes pose a serious threat to the natural environment in which human beings live - endangering the physical and mental health of the public, spread...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26
CPCC04B7/26C04B2111/00215C04B7/3456Y02P40/10Y02P40/121C04B7/425C04B7/43C04B7/47
Inventor 施惠生吴凯邓恺原峰
Owner TONGJI UNIV
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