Resource-saving low-carbon cement clinker and preparation method thereof

A low-carbon cement clinker, resource-saving technology, applied in cement production and other directions, can solve the problems of pollution, waste rock and waste residue not being effectively disposed of, and occupying land and environment.

Inactive Publication Date: 2021-09-07
阳新娲石水泥有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, there are a large amount of soil slag and low-grade waste rocks in the surrounding mines such as Huangshi Yangxin, and a large amount of waste residues have accumulated near chemical, power plants, and

Method used

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  • Resource-saving low-carbon cement clinker and preparation method thereof
  • Resource-saving low-carbon cement clinker and preparation method thereof
  • Resource-saving low-carbon cement clinker and preparation method thereof

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preparation example Construction

[0040] The preparation method of the resource-saving low-carbon cement clinker comprises the following steps:

[0041] S1. Weigh the raw materials, mix them according to the weight percentage, dry them, put them into the raw meal mill, and grind them into raw meal powder. Mixed fine powder A with less than 15% remaining and less than 1.5% sieved at 200 μm; Among them, the sandstone and shale in the raw materials are stacked according to the quality, crushed and pre-homogenized for later use, and the coal is stacked according to the quality and pre-homogenized spare;

[0042] S2. Put the mixed powder A in a rotary kiln and calcinate at 1300-1350° C. for 30-60 minutes. After the clinker is calcined, enter the cooling machine to cool down rapidly to obtain cement clinker B.

[0043] The above method is applied to the new dry process clinker production line, the scale of the production line is 4000-10000t / d, the raw material mill adopts vertical roller mill, and the preheater is ...

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Abstract

The invention discloses a resource-saving low-carbon cement clinker and a preparation method thereof, and belongs to the technical field of Portland cement clinker production. The cement clinker comprises the following raw materials in percentage by mass: 45-70% of high-calcium low-magnesium limestone, 10-40% of barren rock, 4-12% of shale or sandstone, 4-12% of slag, 1-3% of sulfate slag or iron slag, 1-3% of fly ash, 0-3% of coal cinder or coal gangue, 0.5-3% of phosphorus slag and phosphogypsum and 0.1-0.3% of an added activating agent. According to the resource-saving low-carbon cement clinker and the preparation method thereof of the invention, a large amount of solid waste is utilized, the adopted industrial waste residue is formed by high-temperature calcination, carbonate hardly exists, and CO2 hardly occurs after high-temperature calcination is performed again; the mixing amount of the industrial waste residues is high, the use amount of limestone is greatly reduced; the mineralization of trace elements in the industrial waste residues is utilized, and the activating agent is added, so that the burnability of the raw materials is improved, the sintering stability of the clinker is reduced, and the performance of the clinker is improved; the firing temperature of the low-carbon cement clinker is reduced by 100-150 DEG C compared with the firing temperature 1450 DEG C of traditional Portland cement clinker, and therefore, the coal consumption is obviously reduced, and the emission of CO2 is reduced.

Description

technical field [0001] The invention relates to the technical field of Portland cement clinker production, in particular to a resource-saving low-carbon cement clinker and a preparation method thereof. Background technique [0002] Climate change has become the most important environmental issue in the world. Carbon dioxide emission reduction has also become a globally recognized important measure to tackle climate change and slow down global warming. The industrial sector consumes one-third of the world's energy and emits nearly 40% of carbon dioxide. It is the focus industry that should be paid attention to in carbon dioxide emission reduction. The cement industry is the most important carbon dioxide emission sector in the industrial field. Facing the increasingly severe pressure of environmental protection, it is imperative to reduce carbon dioxide emissions in the cement industry. Clinker is the most important and indispensable raw material for the production of buildi...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/43
CPCC04B7/243C04B7/43Y02P40/10
Inventor 胡龙明罗吉祥柯于凯程瑞忠
Owner 阳新娲石水泥有限公司
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