Method for regulating and controlling alite crystal structure in cement clinker

Abstract

The invention discloses a method for regulating and controlling an alite crystal structure in cement clinker. Th method comprises the following steps: simultaneously introducing a magnesium element and a sulfur element in the preparation process of a Portland cement raw material, and completely converting M3-type alite in the clinker into M1-type alite under the combined action of the magnesium element and the sulfur element. The raw materials used in the crystal structure regulation and control method are easy to obtain, and the method is simple, easy to operate and high in universality. In actual production, desulfurized gypsum, phosphogypsum and the like can be used as sulfur sources, so that the comprehensive utilization value of industrial by-products is increased. The magnesium source can be selected from low-quality limestone, no additional ingredient components need to be added, the operation is convenient, the use of the low-quality limestone is increased, and the production cost is reduced. After being regulated and controlled by the method, the alite crystal structure in the Portland cement clinker can be completely converted from M3 type or M1 / M3 mixed type into M1 type.

Description

technical field

[0001] The invention belongs to the technical field of civil engineering materials, and relates to a control method for alite crystal structure in cement clinker. Background technique

[0002] my country's cement industry is developing rapidly. In 2019, my country's cement output was nearly 2.33 billion tons, a year-on-year increase of 6.1%, accounting for more than 50% of the world's total cement output, ranking first in the world. Although my country is a big country in cement production, it is not a powerful country. The overall quality of cement is not high, which affects the life of concrete projects in our country. Therefore, the performance of the output cement must be improved. Portland cement is the cement variety with the largest output, the largest amount of use, and the widest range of applications. It is mainly composed of Portland cement clinker, gypsum and mixed materials. To improve the performance of Portland cement, mainly improve the perfo...

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