Cement clinker and preparation method thereof

A technology of cement clinker and mixture, which is applied in the field of cement, can solve the problems of insufficient utilization, etc., and achieve the effects of weakening pipeline crust clogging, reducing cleaning times, and avoiding clogging

Inactive Publication Date: 2019-01-15
新疆中建西部建设水泥制造有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cement clinker and its preparation method, which aims to improve the problem that the existing oil shale solid waste accumulation cannot be fully utilized

Method used

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preparation example Construction

[0030] A method for preparing cement clinker, comprising:

[0031] Mix limestone, copper slag, coal gangue and oil shale solid waste to obtain a mixture;

[0032] The mixture is conveyed for grinding, homogenization and then conveyed to the preheater for preheating. The temperature of the primary outlet of the preheater is 310-320°C;

[0033] After preheating, it is sent to the decomposition furnace for decomposition, and the outlet temperature of the decomposition furnace is lower than 860°C;

[0034] The materials decomposed by the calciner are transported to the rotary kiln for calcination, and the secondary air temperature of the rotary kiln is lower than 1250°C.

[0035] In the prior art, cement clinker is also prepared by using oil shale solid waste residue, limestone and other materials. However, during the preparation process, the pipeline and preheater will be blocked, and the chlorine ions and sulfate ions excluded from the decomposition furnace will be enriched in ...

Embodiment 1

[0061] The present embodiment provides a kind of cement clinker, mainly makes through the following steps:

[0062] The mixture of limestone, copper slag and coal gangue is pre-homogenized, and the oil shale solid waste is pre-homogenized; the mixed and pre-homogenized materials are grinded and homogenized to obtain a mixture.

[0063] The mixture is sent to the preheater for preheating, and the temperature of the primary outlet of the preheater is 310°C;

[0064] After preheating, it is sent to the calciner for decomposition, and the temperature at the outlet of the calciner is 850°C;

[0065] The materials decomposed by the calciner are transported to the rotary kiln for calcination, and the secondary air temperature of the rotary kiln is 1240°C.

[0066] The mixture calcined by the rotary kiln is transported to the grate cooler for cooling.

[0067] Among them, the mass ratio of limestone, copper slag, coal gangue and oil shale solid waste is 80:2:14.5:3.5.

[0068] The ...

Embodiment 2

[0070] The present embodiment provides a kind of cement clinker, mainly makes through the following steps:

[0071] The mixture of limestone, copper slag and coal gangue is pre-homogenized, and the oil shale solid waste is pre-homogenized; the mixed and pre-homogenized materials are grinded and homogenized to obtain a mixture.

[0072] The mixture is sent to the preheater for preheating, and the temperature of the primary outlet of the preheater is 320°C;

[0073] After preheating, it is sent to the calciner for decomposition, and the temperature at the outlet of the calciner is 855°C;

[0074] The materials decomposed by the calciner are transported to the rotary kiln for calcination, and the secondary air temperature of the rotary kiln is 1250°C.

[0075] The mixture calcined by the rotary kiln is transported to the grate cooler for cooling.

[0076] Among them, the mass ratio of limestone, copper slag, coal gangue and oil shale solid waste is 77:3:16:4.

[0077] Oil shal...

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Abstract

The invention relates to the field of cement and specifically relates to cement clinker and a preparation method thereof. The preparation method comprises the steps: mixing limestone, copper slag, coal gangue and oil shale solid waste residues to obtain a mixture; conveying the mixture into a raw material roller press to be ground, homogenizing and then conveying the mixture into a preheater to bepreheated, wherein a primary outlet temperature of the preheater is 310 to 320 DEG C; sending the mixture into a decomposing furnace to be decomposed after the mixture is preheated, wherein an outlettemperature of the decomposing furnace is lower than 860 DEG C; conveying the material decomposed by the decomposing furnace to a rotary kiln to be roasted, wherein a secondary air temperature of therotary kiln is lower than 1,250 DEG C. The method has the characteristics of convenience in operation and stable production operation and further has the advantages of low liquid phase amount in clinker, fine clinker agglomeration grains, good crystal growth, stable quality indexes and the like.

Description

technical field [0001] The invention relates to the field of cement, in particular to a cement clinker and a preparation method thereof. Background technique [0002] The amount of solid waste left by oil shale production is huge, and the oil shale solid waste is a material with a considerable particle size and excellent activation performance that contains a small amount of residual carbon. Proper use of it can reduce the damage of industry to the environment. [0003] The present invention uses it to prepare cement clinker, and the components play their value. Contents of the invention [0004] The purpose of the present invention is to provide a kind of cement clinker and its preparation method, which aims at improving the problem that the existing oil shale solid wastes are accumulated and cannot be fully utilized. [0005] The invention provides a technical solution: [0006] A method for preparing cement clinker, comprising: [0007] Mix limestone, copper slag, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/36C04B7/30C04B7/42C04B7/43
CPCC04B7/30C04B7/36C04B7/42C04B7/432C04B7/434Y02P40/10
Inventor 卢锦林刘军李应超詹永平穆乾
Owner 新疆中建西部建设水泥制造有限公司
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