Particulate Portland cement clinker and preparation method thereof

A technology of Portland cement and cement clinker, which is applied in the field of small-particle Portland cement clinker and its preparation, can solve the problems of not being widely used on a large scale, going to the bottleneck, difficulties, etc., achieving good sintering conditions, reducing The effect of burning coal consumption and burning energy consumption is low

Pending Publication Date: 2015-09-30
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the former has made great progress, such as adding slag, fly ash and other admixtures to cement, or adopting modern new dry production technology and high-efficiency grinding technology, but this technology has reached a bottleneck, and I want

Method used

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  • Particulate Portland cement clinker and preparation method thereof
  • Particulate Portland cement clinker and preparation method thereof
  • Particulate Portland cement clinker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Using the raw material mix ratio of general portland cement, the three ratios of cement clinker are controlled as follows: KH (lime saturation): 0.90±0.02, SM (silicon ratio): 2.3±0.1, IM (aluminum ratio): 1.5 ±0.1. Add 0.5% control agent to prepare raw meal. The raw meal is pulverized by the raw meal mill and then enters the homogenization storage. Decomposition furnace, the decomposition rate is controlled to 96%, and then calcined at a high temperature of 1380 ° C, the calcined clinker enters the clinker warehouse after cooling, and the apparent size of more than 50% of the calcined clinker is ≤ 3.0mm. The physical properties of the materials are listed in Table 1.

[0036] Table 1

[0037]

Embodiment 2

[0039] Using the raw material mix ratio of general portland cement, the three ratios of cement clinker are controlled as follows: KH (lime saturation): 0.90±0.02, SM (silicon ratio): 2.3±0.1, IM (aluminum ratio): 1.5 ±0.1. Add 1.0% structure inducer to prepare raw meal. The raw meal is pulverized by the raw meal mill and enters the homogenization storage. External calciner, the decomposition rate is controlled to 96%, and then calcined at a high temperature of 1380 ° C, the calcined clinker enters the clinker warehouse after cooling, and the apparent size of more than 50% of the calcined clinker is ≤ 2.8mm. The physical properties of the clinker are listed in Table 2.

[0040] Table 2

[0041]

Embodiment 3

[0043] Using the raw material mix ratio of general portland cement, the three ratios of cement clinker are controlled as follows: KH (lime saturation): 0.90±0.02, SM (silicon ratio): 2.3±0.1, IM (aluminum ratio): 1.5 ±0.1. Add 2.2% structure inducer to prepare raw meal. The raw meal is ground by the raw meal mill and enters the homogenization storage. The homogenized raw meal powder is then pumped to the kiln tail suspension preheater and kiln External calciner, the decomposition rate is controlled to 96%, and then calcined at a high temperature of 1380 ° C, the calcined clinker enters the clinker warehouse after cooling, and the apparent size of more than 50% of the calcined clinker is ≤ 2.8mm. The physical properties of the clinker are listed in Table 3.

[0044] table 3

[0045]

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PUM

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Abstract

The invention discloses particulate Portland cement clinker and a preparation method thereof. A control agent is directly mixed in raw materials in proportion as a raw material component and the materials are calcined by adopting a novel dry-process kiln. The clinker obtained after calcination contains plenty of clinker particles with appearances like fine pearls, wherein the percent of the particulate cement clinker with apparent particle size being 0.1-3.0mm in all the cement clinker exceeds 50%. The control agent is selected from natural gypsum, anhydrite, fluorapatite, copper slag, steel slag, zinc slag, nickel slag, phosphorus slag, flyash or a composite thereof. The mixing amount of the control agent is 0.1-5% compared with that of the cement raw materials. Compared with ordinary Portland cement, the mineral structure of the cement clinker, which is provided by the invention, has the effects of low energy consumption, low carbon content, high strength, and the like.

Description

technical field [0001] The invention relates to a cement clinker and a preparation method thereof, in particular to a small particle portland cement clinker and a preparation method thereof. Background technique [0002] The cement industry is a resource- and energy-dependent basic raw material industry. my country is the world's largest cement producer and consumer. In 2012, my country's cement output accounted for 60% of the world's output. Cement production consumes a large amount of non-renewable natural resources such as limestone and clay, and consumes a large amount of energy such as coal and electricity. At the same time, it emits A large amount of waste gas such as carbon dioxide, sulfur dioxide and nitrogen oxides are released. Huge consumption of energy and resources has overwhelmed my country's mineral resources, and a large amount of waste gas emissions have exacerbated the greenhouse effect and acid rain, seriously polluting the environment. At present, the co...

Claims

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Application Information

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IPC IPC(8): C04B7/42
Inventor 许毅刚陈雪梅阳运霞钟文
Owner JIAHUA SPECIAL CEMENT
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