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High-iron sulfoaluminate cement clinker and preparation method of same

A high-iron sulfoaluminate and cement clinker technology, applied in cement production and other directions, can solve the problems of uneven quality of sulfoaluminate cement, ununiform production and operation parameters, influence of early strength of sulfate cement, etc. Utilization rate, wide source of raw materials, effect of reducing environmental pressure

Inactive Publication Date: 2018-12-18
JIAHUA SPECIAL CEMENT
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  • Claims
  • Application Information

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Problems solved by technology

The cement has the characteristics of fast setting, high strength, micro-expansion and corrosion resistance, making it successfully used in construction projects such as emergency repair and construction projects, anti-seepage plugging, urban road repairs, winter construction, and GRC products. Cement, as a cement invented by the Chinese, has a development history of nearly 40 years, but there are few reports related to industrial production and theoretical guidance on industrial production. The quality of sulphoaluminate cement used in the market is also uneven. The reason is actually There are many factors that affect the quality of sulphoaluminate cement in the production process. First, from the aspect of raw materials: the aluminum content in the raw material bauxite, the form of aluminum, the high iron content, the high silicon content, and the silicon content in limestone Excessively high grades occupy the effective mineral components, which affects the early strength of sulfate cement and cannot give full play to its advantages; from the perspective of firing, there is no relatively unified idea of ​​production operation parameters, and there is no theory like ordinary silicate to guide

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  • High-iron sulfoaluminate cement clinker and preparation method of same

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Embodiment 1

[0021] This embodiment proposes a high iron sulfoaluminate cement clinker.

[0022] The cement clinker is composed of the following raw materials in mass percentage: 70% of calcium material, 5% of aluminum material, 10% of iron material, and 15% of gypsum material.

[0023] The preparation method of cement clinker is as follows: after crushing and grinding the aforementioned raw materials, they are mixed, and then the mixed raw meal is calcined at 1100° C. for 90 minutes, and the cement clinker is obtained after cooling. The mineral composition of the cement clinker is C 4 A 3 S: 55%, C 2 S: 20%, C 4 AF: 15%, Others: 10%.

Embodiment 2

[0025] This embodiment proposes a high iron sulfoaluminate cement clinker.

[0026] The cement clinker is composed of the following raw materials in mass percentage: 45% of calcium material, 40% of aluminum material, 10% of iron material, and 5% of gypsum material.

[0027] The preparation method of cement clinker is as follows: after crushing and grinding the aforementioned raw materials, they are mixed, and then the mixed raw meal is calcined at 1245° C. for 30 minutes, and the cement clinker is obtained after cooling. The mineral composition of the cement clinker is C 4 A 3 S: 35%, C 2 S: 30%, C 4 AF: 25%, Others: 10%.

Embodiment 3

[0029] This embodiment proposes a high iron sulfoaluminate cement clinker.

[0030] The cement clinker is composed of the following raw materials in mass percentage: 51% limestone, 17% low-grade bauxite, 24% high-iron bauxite, and 8% desulfurized gypsum.

[0031] The preparation method of cement clinker is as follows: after crushing and grinding the aforementioned raw materials, they are mixed, and then the mixed raw meal is calcined at 1200°C for 30 minutes, and the cement clinker is obtained after cooling. The mineral composition of the cement clinker is C 4 A 3 S: 36%, C 2 S: 33%, C 4 AF: 23%, Other: 8%.

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Abstract

The invention discloses a high-iron sulfoaluminate cement clinker and a preparation method of same. The high-iron sulfoaluminate cement clinker includes, by mass, 45-70% of a calcium material, 5-40% of an aluminum material, 5-30% of an iron material, and 5-15% of a gypsum material. The clinker has mineral composition of: 35-55% of C4A3S, 20-35% of C2S and 15-25% of C4AF. In the invention, the cement clinker is prepared from low-grade calcium material, gypsum material and the like being raw materials, so that the product is higher than ordinary Portland cement in both early strength and later strength; due to the specific mineral composition, the cement clinker is low in overall hydration heat and has a good volume stability.

Description

technical field [0001] The invention relates to a high-iron sulfoaluminate cement clinker and a preparation method thereof, belonging to the technical field of cement clinker production. Background technique [0002] After more than 200 years of development, cement has gradually formed three series of silicates, aluminates, and sulphoaluminates. Portland cement is the most widely used inorganic cementitious material today. However, the performance and characteristics of Portland cement itself determine that it cannot meet the needs of some special projects and new construction technologies. Therefore, all countries in the world are researching and developing special cement and special cement. In the 1970s, the China Academy of Building Materials Science independently researched and invented the sulphoaluminate series cement. The cement is obtained by calcining raw materials with appropriate components, mainly calcium sulphoaluminate and dicalcium silicate. Cement clinker w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/32C04B7/24C04B7/147C04B7/43
CPCC04B7/147C04B7/24C04B7/32C04B7/43Y02P40/10
Inventor 陈雪梅喻庆华钟文
Owner JIAHUA SPECIAL CEMENT
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