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Production method for cement clinker by utilizing waste materials from calcium carbide production

A technology of cement clinker and waste, which is applied in the field of building materials, can solve the problems of fewer reports on process methods, and achieve the effects of reducing firing costs, reducing emissions, and a high degree of automation

Active Publication Date: 2015-12-02
溧阳天山水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the process of preparing cement clinker from the waste in the calcium carbide production process.

Method used

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  • Production method for cement clinker by utilizing waste materials from calcium carbide production
  • Production method for cement clinker by utilizing waste materials from calcium carbide production
  • Production method for cement clinker by utilizing waste materials from calcium carbide production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation steps of the embodiment of the present invention are as follows:

[0036] 1. Calculate the ratio of raw materials by calculating the silicon rate (SM), aluminum rate (IM) and clinker saturation coefficient (KH) of cement clinker; the main chemical composition of each raw material (%)

[0037] name

Fe 2 o 3

SiO 2

CaO

al 2 o 3

pyrite slag

63.46

12.07

3.35

1.9

fly ash

4.46

53.52

4.79

26.2

shale

6.87

52.24

4.27

8.39

quicklime powder

0.4

0

83.5

0.9

Lime kiln dust removal powder

0.19

2.42

53.13

0.31

[0038] In this example, 3% of pyrite slag, 14% of fly ash, 12% of shale, 40% of quicklime powder, and 31% of lime kiln dust removal powder

[0039] Among them: Fe 2 o 3 %=63.46×0.03+4.46×0.14+6.87×0.12+0.4×0.4+0.19×0.31=3.57

[0040] SiO 2 %=12.07×0.03+53.52×0.14+52.24×0.12+0×0.4+2.42×0.31=14.9

[0041] ...

Embodiment 2

[0052] The preparation steps of the embodiment of the present invention are as follows:

[0053] 1. Calculate the ratio of raw materials by calculating the silicon rate (SM), aluminum rate (IM) and clinker saturation coefficient (KH) of cement clinker; the main chemical composition of each raw material (%)

[0054] name

Fe 2 o 3

SiO 2

CaO

Al 2 o 3

pyrite slag

63.46

12.07

3.35

1.9

fly ash

4.46

53.52

4.79

26.2

shale

6.87

52.24

4.27

8.39

quicklime powder

0.4

0

83.5

0.9

Lime kiln dust removal powder

0.19

2.42

53.13

0.31

[0055] In this example, 3% of pyrite slag, 14% of fly ash, 10% of shale, 35% of quicklime powder, and 38% of lime kiln dust removal powder

[0056] Among them: Fe 2 o 3 %=63.46×0.03+4.46×0.14+6.87×0.10+0.4×0.35+0.19×0.38=3.4

[0057] SiO 2 %=12.07×0.03+53.52×0.14+52.24×0.10+0×0.35+2.42×0.38=14.0

[0058]...

Embodiment 3

[0069] The preparation steps of the embodiment of the present invention are as follows:

[0070] 1. Calculate the ratio of raw materials by calculating the silicon rate (SM), aluminum rate (IM) and clinker saturation coefficient (KH) of cement clinker; the main chemical composition of each raw material (%)

[0071] name

Fe 2 o 3

SiO 2

CaO

Al 2 o 3

pyrite slag

63.46

12.07

3.35

1.9

fly ash

4.46

53.52

4.79

26.2

shale

6.87

52.24

4.27

8.39

quicklime powder

0.4

0

83.5

0.9

Lime kiln dust removal powder

0.19

2.42

53.13

0.31

[0072] In this example, 3% of pyrite slag, 14% of fly ash, 11% of shale, 32% of quicklime powder, and 40% of lime kiln dust removal powder

[0073] Among them: Fe 2 o 3 %=63.46×0.03+4.46×0.14+6.87×0.11+0.4×0.32+0.19×0.4=3.48

[0074] SiO 2 %=12.07×0.03+53.52×0.14+52.24×0.11+0×0.32+2.42×0.4=14.6

[0075] ...

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Abstract

The invention relates to a production method for cement clinker by utilizing waste materials from calcium carbide production. The method comprises the following steps: 1) weighing materials: weighing the following raw materials by mass: 30% to 40% of quicklime powder, 30% to 40% of limekiln dust removing powder, 8.5% to 12.5% of shale, 2% to 3.5% of pyrite slag and 11.5% to 15.5% of fly ash; 2) dewatering the quicklime powder and the limekiln dust removing powder; 3) taking the raw materials and carrying out extruding and grinding, and mixing and homogenizing the obtained materials; and 4) carrying out conveying into a kiln, and carrying out calcining according to a novel dry process so as to prepare the cement clinker. The production method provided by the invention uses the quicklime powder and the limekiln dust removing powder in the calcium carbide production process as the raw materials, and employs a novel cement-production dry process which has the advantages of large production capacity, high degree of automation and high thermal efficiency, so secondary utilization of industrial waste materials is realized.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing cement clinker from waste produced by calcium carbide. Background technique [0002] In the traditional cement industry, the calcium source is often provided by calcium carbonate, which decomposes into calcium oxide at high temperature, and the calcium oxide reacts with aluminum and silicon sources to form various single minerals of cement clinker. In this process, quicklime can not only completely replace calcium carbonate as a calcium source, but also omit the pyrolysis process of calcium carbonate in the calcination process, which reduces energy consumption and saves costs during the calcination process of raw materials. [0003] In the process of calcium carbide production, a large amount of waste mainly composed of quicklime and limestone will be produced. If it is discarded, it will inevitably cause waste of resources and cannot achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/26C04B7/36
CPCY02P40/10Y02P40/121
Inventor 马保国张昺榴谭洪波陈方颉
Owner 溧阳天山水泥有限公司
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