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

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...

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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 iron and steel enterprises. These waste rocks and waste residues cannot be effectively disposed of, which not only occupies land It will also cause environmental pollution, which urgently needs to be properly disposed of

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