High-iron Belite sulphoaluminate cement clinker and preparation method thereof

Abstract

The invention discloses a high-iron Belite sulphoaluminate cement clinker and a preparation method thereof. The high-iron Belite sulphoaluminate cement clinker comprises, in weight percent, 55-65% ofcalcium materials, 5-35% of siliceous materials, 0-20% of aluminous materials, 5-35% of iron-aluminum materials and 5-15% of gypsum materials. Mineral components of the clinker comprise, in weight, 10-30% of C4A3S, 40-55% of C2S and 10-35% of C4AF. According to the clinker, the calcium materials, the gypsum materials and the like with poor taste serve as raw materials to prepare the cement clinker, the cement clinker has the advantages that the early strength and the later strength of the cement clinker are higher than these of ordinary Portland cement, specific mineral components of the clinker decide low overall hydration heat of the clinker, and the clinker has good volume stability.

Description

technical field [0001] The invention relates to a high-speed iron belite sulphoaluminate 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. Ce...

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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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