Cement clinker produced by using various industrial waste residues

A technology for cement clinker and industrial waste residue, applied in the field of cement clinker, can solve the problems of energy saving, emission reduction, consumption reduction not achieving the best effect, waste of natural resources and energy, difficulty in promotion and application, etc., and achieve obvious environmental protection effect. , the utilization of waste residue is large, the effect of saving natural resources and energy

Inactive Publication Date: 2012-06-27
宁夏建筑材料研究院(有限公司)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional cement clinker is calcined with limestone, clay, silica sand, iron ore, gypsum, fluorite, coal and other natural mineral resources and energy as raw materials, which not only wastes a lot of natural resources and energy, but also emits a lot of CO 2 and other harmful gases, seriously polluting the environment
At present, there has been a technology of using magnesium metal reduction slag or calcium carbide mud or dicyandiamide slag to replace part or all of limestone, clay, iron ore and other ingredients to make raw meal calcined cement clinker, but it is limited by raw material chemistry. Due to the fluctuation of the composition and the limitation of the control parameters of the cement clinker production process, the waste residue utilization is small, the quality is single, the energy saving, emission reduction, and consumption reduction have not yet achieved the best results, and it is difficult to popularize and apply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The cement clinker is produced by the new dry method rotary kiln calcination process, and the process flow is: raw material batching → raw meal grinding → clinker calcination

[0027] Raw materials are waste stone powder from limestone mines, magnesium reduction slag discharged from metal magnesium factory, lime slag discharged from lime factory, natural air-dried calcium carbide mud discharged from PVC production factory, natural air-dried dicyandiamide waste residue discharged from dicyandiamide production factory, and power plant discharge fly ash, sulfuric acid slag discharged from chemical plants.

[0028] Ratio (percentage by weight) of white raw material is: stone powder (No. 2) 42.79%, metal magnesium reduction slag (dry slag) 17.7%, calcium carbide mud (No. 1) 30.00%, fly ash (No. 1) 8.51, sulfuric acid slag (No. 1) 1.00%, raw meal three rate value KH=0.98, n=2.27, p=1.09, clinker KH=0.88, n=2.20, p=1.30.

example 2

[0030] The ratio of white raw material (percentage by weight) is: stone powder (No. 2) 40.00%, metal magnesium reduction slag (dry slag) 15.00%, calcium carbide mud (No. 1) 23.82%, fly ash (No. 1) 5.05%, double Cyanamide slag (No. 2) 15.43%, sulfuric acid slag (No. 1) 0.70%, raw meal three rate value KH=1.00, n=2.40, p=1.19, clinker KH=0.89, n=2.40, p=1.40.

example 3

[0032] Cement clinker is produced by the shaft kiln calcination process, and the process flow is: raw material batching → raw meal grinding → raw meal into balls → clinker calcination

[0033] Raw materials are waste stone powder from limestone mines, magnesium reduction slag discharged from metal magnesium factory, white ash slag discharged from lime factory, natural air-dried calcium carbide mud discharged from PVC production factory, natural air-dried dicyandiamide waste residue discharged from dicyandiamide production factory, coal washing plant Coal gangue discharged, sulfuric acid slag discharged from chemical plants.

[0034] Raw material ratio (percentage by weight) is: stone powder (No. 1) 28.7%, metal magnesium reduction slag (dry slag) 23.0%, calcium carbide mud (No. 2) 22.0%, sulfuric acid slag (No. 2) 1.2%, lime slag ( No. 2) 13.0%, gangue 2.8%, fluorite 1.0%, anthracite 7.3%, raw meal calorific value 2657KJ / Kg, raw meal three rate value KH=0.96, n=2.19, p=1.40. ...

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PUM

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Abstract

The invention relates to cement clinker produced by using various industrial waste residues, which is characterized in that: metal magnesium reducing slag, lime mud or calcium carbide mud or dicyandiamide slag, mountain flour, fly ash or coal gangue and sulfur acid residue are compounded and optimally mixed to produce a raw material; and the raw material is calcined by a calcining process to produce the cement clinker. The cement clinker is characterized in that: various industrial waste residues are comprehensively used to produce the cement clinker, a large amount of waste residues are used, a large amount of natural resources and energy is saved, and standard coal consumption is saved by more than 20 percent in the calcining process of the waste residues which are compounded and optimally mixed, the emission of CO2 and other harmful gases in a large amount is reduced at the same time, the calcining speed of the clinker is increased, and the energy-saving, emission-reducing, consumption-reducing and environmental-protection effects are obvious; and experiments prove that single-machine output and production efficiency are improved and that after 28 days, the pressure strength ofthe clinker is improved by more than 5MPa compared with that of the clinker produced by the traditional method.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a cement clinker produced by utilizing various industrial waste residues. Background technique [0002] Traditional cement clinker is calcined with limestone, clay, silica sand, iron ore, gypsum, fluorite, coal and other natural mineral resources and energy as raw materials, which not only wastes a lot of natural resources and energy, but also emits a lot of CO 2 and other harmful gases, seriously polluting the environment. At present, there has been a technology of using magnesium metal reduction slag or calcium carbide mud or dicyandiamide slag to replace part or all of limestone, clay, iron ore and other ingredients to make raw meal calcined cement clinker, but it is limited by raw material chemistry. Due to the fluctuation of the composition and the limitation of the control parameters of the cement clinker production process, the waste residue utilization is smal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24
CPCY02P40/10
Inventor 段庆奎王翠萍郑建峰许才杨立辉雷震任闻波李静华
Owner 宁夏建筑材料研究院(有限公司)
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