Portland cement clinker, and preparation method and production equipment thereof
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A Portland cement and production equipment technology, applied in cement production, etc., can solve the problems of endangering personal safety, not exceeding 10%, occupying land resources, etc., to reduce the amount of coal fed, improve the decomposition rate, and reasonable particle gradation Effect
Active Publication Date: 2019-01-11
吉林亚泰明城水泥有限公司
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[0003] Dust removal ash is the soot and dust collected by the dust collection system of the steel plant; graphite tailings are waste rocks, dumped soil and tailings produced during the mining of graphite; surrounding steel plants produce a large amount of dust removal ash every year, and the comprehensive utilization rate does not exceed 10%. Accumulation occupies a large amount of land resources, causing environmental pollution
The stockpiling of graphite tailings occupies a large amount of land, destroys the land, pollutes the water body, endangers personal safety and causes property loss
Method used
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Embodiment 1
[0029] A Portland cement clinker, the cement clinker formula includes 80-84% of limestone, 4-8% of dedusting ash, 4-8% of graphite tailings, and 4-6% of silica.
[0030] 2. A Portland cement clinker according to claim 1, characterized in that, the Cao in the limestone is greater than 47%, and the SiO in the silica 2 More than 80%, Fe in dust removal ash 2 o 3 More than 40%, Al in graphite tailings 2 o 3 Greater than 17%.
[0031] The preparation method of Portland cement clinker comprises the following steps:
[0032] S1: Put the raw material prepared according to the proportion into the raw material mill for grinding, and control the amount of water spraying at 0.5-2 cubic meters per hour while grinding, and the grinding pressure at 8Mpa;
[0033] S2: drying the raw meal after grinding, wherein the comprehensive moisture content of the incoming raw meal is less than 5%, and the moisture content of the outgoing raw meal is less than 0.5%;
[0034] S3: pass the dried raw ...
Embodiment 2
[0046] A Portland cement clinker, the cement clinker formula includes 81.8% of limestone, 6.1% of dedusting ash, 6.4% of graphite tailings, and 5.6% of silica. Production mode is the same as embodiment one.
Embodiment 3
[0048] A Portland cement clinker, the cement clinker formula includes 80.4% of limestone, 7.2% of dedusting ash, 7.4% of graphite tailings, and 5% of silica. Production mode is the same as embodiment one.
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Abstract
The invention discloses a Portland cement clinker, and a preparation method and production equipment thereof. The Portland cement clinker comprises 80 to 84% of limestone, 4 to 8% of fly ash, 4 to 8%of graphite mine tailing, and 4 to 6% of silica. The preparation method comprises following steps: the above four raw materials are introduced into a raw mill from a blending tank at a certain ratio for grinding together; after grinding, an obtained raw material is introduced into a homogenizing tank for homogenizing; after homogenizing, the raw material is introduced into a preheater for preheating decomposition; after decomposition, the raw material is introduced into a rotary kiln for calcining so as to obtain the Portland cement clinker. The particle sizes of the fly ash and the graphite mine tailing are extremely low, so that raw material grindability is improved, the particle size is reduced by 8.3% of the particle size of conventional raw material, raw material grinding electricityconsumption is reduced by about 1.5kwh/t; the raw material particle size grade combination is more reasonable, raw material burnability is improved, and the yield is increased by 5%.
Description
technical field [0001] The invention relates to the field of cement industry production technology and comprehensive utilization of industrial waste, in particular to a Portland cement clinker, a preparation method and production equipment thereof. Background technique [0002] Cement is one of the most used industrial products in the world. Portland cement clinker is fired at a high temperature, consumes a large amount of high-quality limestone resources, and produces a large amount of CO2 greenhouse gas and harmful gases such as SOx and NOx. At the same time, the mineral composition of Portland cement clinker is mainly C3S, C2S, C3A and C4AF. [0003] Dust removal ash is the soot and dust collected by the dust collection system of the steel plant; graphite tailings are waste rocks, dumped soil and tailings produced during the mining of graphite; surrounding steel plants produce a large amount of dust removal ash every year, and the comprehensive utilization rate does not ...
Claims
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