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Cement clinker employing silica sand part instead of sandstone and preparation technology of cement clinker

A technology for cement clinker and preparation process, which is applied in cement production, clinker production, etc. It can solve the problems of affecting the formation of clinker mineral components, affecting the quality of clinker, and high harmful components, so as to improve equipment production efficiency and beautify the ecology Environment, the effect of reducing the decomposition rate

Active Publication Date: 2017-09-29
TIANJIN ZHENXING CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In cement production, the R of the raw meal 2 The O content has a direct impact on the quality of cement products. If there is a small amount of R in the raw meal 2 O, will improve the flammability of the raw meal and increase the early strength of the raw meal, but if the R in the raw meal 2 If the O content is too high, it is easy to cause skin blockage during cement clinker calcination
Moreover, high levels of harmful components will inevitably affect the formation of clinker mineral components during clinker calcination, thereby affecting the quality of clinker and becoming a bottleneck for large-scale resource utilization

Method used

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  • Cement clinker employing silica sand part instead of sandstone and preparation technology of cement clinker

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Effect test

Embodiment 1

[0027] The method of utilizing silica sand to partially replace the cement clinker of sandstone, the specific steps are as follows:

[0028] 1) Homogenize the production raw materials limestone, alumina red mud, silica sand, sandstone, and construction waste rock respectively and store them in the homogenization warehouse.

[0029] 2) 88.86% of limestone, 2.7% of alumina red mud, 8.44% of silica sand + sandstone + construction waste rock, the mass ratio of silica sand: sandstone: construction waste rock is 1: 3: 1, and then feed it according to the weight ratio Grinding is carried out by the grinding system, and the moisture content of raw meal after grinding is controlled to be ≤1%, and the sieve residue of 80 μm raw meal is ≤14%, so as to obtain raw meal in the form of dry powder.

[0030] 3) The above-mentioned raw meal after grinding is imported into a powder separator for material selection, and the raw meal obtained after material selection is imported into a raw meal ho...

Embodiment 2

[0049] The method of utilizing silica sand to partially replace the cement clinker of sandstone, the specific steps are as follows:

[0050] 1) Homogenize the production raw materials limestone, alumina red mud, silica sand, sandstone, and construction waste rock respectively and store them in the homogenization warehouse.

[0051] 2) 89.80% of limestone, 2.7% of alumina red mud, 7.5% of silica sand + sandstone + construction waste rock, the mass ratio of silica sand: sandstone: construction waste rock is 1: 3: 1, and then feed it according to the weight ratio Grinding is carried out by the grinding system, and the moisture content of raw meal after grinding is controlled to be ≤1%, and the sieve residue of 80 μm raw meal is ≤14%, so as to obtain raw meal in the form of dry powder.

[0052] 3) The above-mentioned raw meal after grinding is imported into a powder separator for material selection, and the raw meal obtained after material selection is imported into a raw meal hom...

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Abstract

The invention relates to a cement clinker employing a silica sand part instead of sandstone. The cement clinker is prepared from the following raw materials in parts by weight: 87-90% of limestone, 2.7-3.0% of alumina red mud and 6-9% of silica sand, sandstone and construction waste rocks, wherein the mass ratio of the silica sand to the sandstone to the construction waste rocks is 1:3:1. A technology specifically comprises the following steps of carrying out burdening, homogenizing, grinding, powder selecting, preheating and decomposing, and finally carrying out high-temperature calcination and then cooling to obtain the cement clinker. By adopting the scheme of replacing the sandstone with the silica sand part to produce the cement clinker, the grindability of raw meal mill is improved; meanwhile, a lot of industrial waste silica sand and construction waste rocks are consumed, so that effective utilization of resources is achieved; the firing quality of the clinker is improved, the firing energy consumption of the clinker is further reduced and the production cost.

Description

technical field [0001] The invention belongs to the technical field of cement industry production technology and comprehensive utilization of industrial solid waste, and in particular relates to a cement clinker in which silica sand partially replaces sandstone and a preparation process thereof. Background technique [0002] Silica sand is industrial waste slag produced in precision casting and steel casting industries, with an annual output of 10,000 to 20,000 tons. The price of silica sand is far lower than that of sandstone, and its chemical composition is also similar to sandstone, but its MgO, R 2 O content, especially R 2 O content is higher than that of sandstone R 2 O content is high. In cement production, the R of the raw meal 2 The O content has a direct impact on the quality of cement products. If there is a small amount of R in the raw meal 2 O, will improve the flammability of the raw meal and increase the early strength of the raw meal, but if the R in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/38C04B7/43
CPCC04B7/246C04B7/38C04B7/43Y02P40/10Y02P40/121
Inventor 娄杰
Owner TIANJIN ZHENXING CEMENT
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