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Cement clinker and preparation process thereof

A technology for cement clinker and preparation process, which is applied in cement production and other directions, can solve the problems of polluting environmental resources, easily generating dust, and polluting the environment, and achieves the effects of protecting the environment, avoiding pollution, and reducing prices.

Inactive Publication Date: 2013-12-11
WEIDUN CEMENT GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, for a long time, a large amount of sandstone powder and scraps produced by sandstone cutting contain a certain amount of SiO 2 However, these sandstone powders and scraps have been stored randomly, which not only takes up a lot of land, but also easily generates dust after drying, which seriously pollutes the environment
After a lot of tests, the SiO content of sandstone powder and leftovers 2 The content is more than 70%, which is an excellent siliceous material in the cement production process, which causes a lot of waste of resources while polluting the environment

Method used

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  • Cement clinker and preparation process thereof
  • Cement clinker and preparation process thereof
  • Cement clinker and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A cement clinker is prepared from raw materials in the following weight ratios: limestone 56.47; sandstone powder 6.37; magnesium slag 7.45; fly ash 2.36; copper slag 1.54.

[0039] The manufacture technique of above-mentioned a kind of cement clinker:

[0040] The first step is to collect limestone, sandstone powder, magnesium slag, fly ash and copper slag, and then mix them according to the following weight ratios: limestone 56.47; sandstone powder 6.37; magnesium slag 7.45; fly ash 2.36; copper slag 1.54;

[0041] In the second step, the limestone, sandstone powder, magnesium slag, fly ash and copper slag mixed in the first step are dried and ground to obtain raw meal powder;

[0042] In the third step, the raw meal powder in the second step is calcined to obtain clinker. Before calcination, the lime saturation coefficient KH value of the cement clinker from 0.886 is increased by 0.01, and the silicon oxygen ratio SM value is increased from 2.46 by 0.05. The valve o...

Embodiment 2

[0044] A cement clinker is prepared from the following raw materials by weight: limestone 60.37; sandstone powder 9.05; magnesium slag 9.65; fly ash 3.76; copper slag 4.75.

[0045] The manufacture technique of above-mentioned a kind of cement clinker:

[0046] The first step is to collect limestone, sandstone powder, magnesium slag, fly ash and copper slag, and then mix them according to the following weight ratios: limestone 60.37; sandstone powder 9.05; magnesium slag 9.65; fly ash 3.76; copper slag 4.75;

[0047] In the second step, the limestone, sandstone powder, magnesium slag, fly ash and copper slag mixed in the first step are dried and ground to obtain raw meal powder;

[0048] In the third step, the raw meal powder in the second step is calcined to obtain clinker. Before calcination, the lime saturation coefficient KH value of the cement clinker is increased from 0.886 to 0.013, and the silicon oxygen ratio SM value is increased from 2.46 by 0.16. The valve opening...

Embodiment 3

[0050] A cement clinker is prepared from the following raw materials by weight: limestone 68.82; sandstone powder 11.42; magnesium slag 12.18; fly ash 4.71; copper slag 2.87.

[0051] The manufacture technique of above-mentioned a kind of cement clinker:

[0052] The first step is to collect limestone, sandstone powder, magnesium slag, fly ash and copper slag, and then mix them according to the following weight ratios: limestone 68.82; sandstone powder 11.42; magnesium slag 12.18; fly ash 4.71; copper slag 2.87;

[0053] In the second step, the limestone, sandstone powder, magnesium slag, fly ash and copper slag mixed in the first step are dried and ground to obtain raw meal powder;

[0054] In the third step, the raw meal powder in the second step is calcined to obtain clinker. Before calcination, the lime saturation coefficient KH value of the cement clinker is increased from 0.886 to 0.016, and the silicon oxygen ratio SM value is increased from 2.46 by 0.11. The valve ope...

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Abstract

The invention discloses cement clinker and a preparation process thereof, belongs to the technical field of cement and a preparation process thereof, and aims to solve the problem of providing cement clinker prepared by a waste industrial raw material and a process for preparing the cement clinker. The invention adopts a technical scheme as follows: the cement clinker is formed by the following components in percentage by weight: 56.47-80.75% of limestone, 6.37-18.92% of sandstone power, 7.45-20.28% of magnesium slag, 2.36-8.69% of slack coal ash, and 1.54-6.75% of copper ore slag. The preparation process of the cement clinker comprises the following steps: Step I, collecting the limestone, the sandstone power, the magnesium slag, the slack coal ash and the copper ore slag, and mixing the limestone, the sandstone power, the magnesium slag, the slack coal ash and the copper ore slag according to the set weight percent; Step II, drying and grinding the limestone, the sandstone power, the magnesium slag, the slack coal ash and the copper ore slag mixed in the Step I, and obtaining crude material power; Step III, burning the crude material power obtained in the Step II, and obtaining the cement clinker. The preparation process is applied to cement production.

Description

technical field [0001] A cement clinker and a preparation process thereof belong to the technical field of cement and its production process. Background technique [0002] With the rapid economic development in recent years, a large number of engineering constructions have been carried out all over the country to meet the needs of social production or life, and cement is an essential building material for engineering construction. Cement is made of limestone, clay and iron ore powder in proportion to be finely ground and mixed, and the mixture at this time is called raw meal. Then calcination is carried out, the general temperature is about 1450 degrees, and the calcined product is called clinker. Then the clinker and gypsum are mixed and ground together in proportion, and it is called cement. The cement at this time is called general portland cement. However, due to the increasing difficulty in mining of sandstone, bauxite and iron powder, the main raw materials used to p...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B7/38
CPCY02P40/10
Inventor 支俊秉徐永生张旭段建宁
Owner WEIDUN CEMENT GRP
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