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Preparation process of low-heat cement clinker

A preparation process, low-heat cement technology, applied in cement production, etc., can solve problems such as unfavorable waste gas and waste residue treatment, increase costs, etc., achieve the effects of reducing sulfide gas and carbon dioxide gas emissions, increasing production, and reducing coal consumption

Inactive Publication Date: 2017-06-20
四川嘉华锦屏特种水泥有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned patents are prepared from raw materials such as dicalcium silicate and calcium sulfoaluminate. During the process of calcination to prepare cement clinker, a large amount of sulfide will be produced, which is not conducive to the treatment of waste gas and waste residue, and increases the cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The present embodiment provides a kind of preparation technology of low heat cement clinker, comprises the following steps:

[0024] S1. Select the following raw material components by mass percentage: 85% limestone, 10% magnesium limestone, 30% aluminum ore waste rock and 2% copper slag;

[0025] S2, after mixing the raw materials selected in step S1, put them into a raw meal mill, mix and grind them finely, pass the fine material through a 100 mesh sieve, add 8% coal powder, and mix with the ground fine material;

[0026] S3. Send the mixed raw materials in step S2 into a rotary kiln for low-heat calcination for 30 minutes to 50 minutes. The calcination temperature is 1300°C for calcination. The rotational speed of the rotary kiln is 3.5r / min, and the calcination pressure is 900Pa.

[0027] In step S3, the tail temperature of the calcination is 970°C. After step S2, the mixed raw materials are sent to a preheater for preheating, and the preheating calcination temperat...

Embodiment 2

[0032] The present embodiment provides a kind of preparation technology of low heat cement clinker, comprises the following steps:

[0033] S1. Select the following raw material components by mass percentage: 60% limestone, 12% magnesium limestone, 34% aluminum ore waste rock and 6% copper slag;

[0034] S2, after mixing the raw materials selected in step S1, put them into a raw meal mill, mix and grind them finely, pass the fine material through a 100-mesh sieve, add 12% coal powder, and mix with the ground fine material;

[0035] S3. Send the mixed raw materials in step S2 into a rotary kiln for low-heat calcination for 40 minutes. The calcination temperature is 1350° C., the rotational speed of the rotary kiln is 3.6 r / min, and the calcination pressure is 1000 Pa.

[0036] In step S3, the tail temperature of the calcination is 980°C. After step S2, the mixed raw materials are sent to a preheater for preheating, and the preheating calcination temperature is 900°C.

[0037] ...

Embodiment 3

[0041] The present embodiment provides a kind of preparation technology of low heat cement clinker, comprises the following steps:

[0042] S1, select the raw material components of the following mass percentages: 80% limestone, 15% magnesium limestone, 32% aluminum ore waste rock and 4% copper slag;

[0043] S2, after mixing the raw materials selected in step S1, put them into a raw material mill for mixing and grinding, and pass the fine material through a 100-mesh sieve, and add 18% coal powder, and mix with the ground fine material;

[0044] S3, sending the mixed raw materials in step S2 into a rotary kiln for low-heat calcination for 50 minutes, the calcination temperature is 1400°C, the rotary kiln speed is 3.8r / min, and the calcination pressure is 1200Pa;

[0045] In step S3, the tail temperature of the calcination is 1000°C. After step S2, the mixed raw materials are sent to a preheater for preheating, and the preheating calcination temperature is 920°C.

[0046] The ...

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PUM

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Abstract

The invention discloses a preparation process of low-heat cement clinker. The preparation process comprises the following steps: selecting 60 to 85 percent of limestone, 10 to 15 percent of high magnesium limestone, 30 to 34 percent of aluminum ore waste rock and 2 to 6 percent of copper slag; mixing the raw materials to obtain a mixture I, placing the mixture I into a raw material mill, mixing and grinding, obtaining fine stuff, filtering the obtained fine stuff by virtue of a 100-mesh sieve, adding 17 to 20 percent of coal ash, and mixing the coal ash and the ground fine stuff; sending the mixed raw materials into a rotary kiln, calcining for 30 to 50 min in a low heat manner, wherein the calcining temperature is 1300 to 1450 DEG C, a rotation speed of the rotary kiln is 3.5 to 3.8 r / min, and the calcining pressure is 900Pa to 1200Pa; and after the calcining is completed, cooling the calcined raw materials, thus obtaining the cement clinker. The cement clinker has the effects of high performance, low energy consumption and low carbon, the production cost is saved, and the emission of sulfide and carbon dioxide can be reduced.

Description

technical field [0001] The invention relates to the technical field of cement clinker production, in particular to a preparation process of low-heat cement clinker. Background technique [0002] Cement is a cementitious material for construction. According to its chemical composition, it can be divided into three categories: portland cement, aluminate cement and sulphoaluminate cement. Portland cement is a commonly used cement, also known as Portland cement, aluminate cement and sulphoaluminate cement are special-purpose cements. Some people joke that cement is the "grain" of construction, and it occupies an important position in human civilization. Now, the world's cement production has reached more than 2 billion tons, which is an indispensable mass product in modern society. [0003] Existing cement clinker processing is usually prepared from raw materials such as calcium sulfate, dicalcium silicate or calcium sulfoaluminate. During the preparation process, a large amou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/14C04B7/147C04B7/42C04B7/44
CPCC04B7/14C04B7/147C04B7/428C04B7/44Y02P40/10
Inventor 贾成群李建海张洪李强平任述均李天泽杨庚社凌绪光周军
Owner 四川嘉华锦屏特种水泥有限责任公司