Coal ash corrective material substituted for clay

Abstract

The invention provides a coal ash cementing material substituted for cement, which is used for mass concrete, and particularly relates to a coal ash corrective material substituted for clay. In the production of cement, when the content of silicon dioxide in the clay is comparatively high, coal ash is substituted for a part of the clay and taken as a clay corrective material to adjust values of KH, n and p. According to the coal ash corrective material substituted for the clay, the coal ash is reasonably matched with the raw material of the high-silicon clay at a certain ratio, so that the matching ratio of raw materials of the cement can be optimized; at the same time of optimizing the matching ratio, the coal consumption can be reduced, the generation of a firing liquid phase is promoted, the dosing of an iron raw material is decreased, the lime saturation coefficient is increased, more silicate minerals are generated, the early strength and the later strength of clinkers are enhanced, the clay resource is protected, the utilization approach of the coal ash is expanded, more lands are protected well while the production cost is lowered, the national industrial policy is met, industrial wastes are treated, and the product quality of the clinkers is enhanced.

Description

technical field [0001] The invention relates to the technical field of fly ash application, in particular to fly ash instead of clay as a correction raw material. Background technique [0002] In cement production, due to different origins, the chemical composition of clay is also different, especially when the silica in clay changes greatly, it has a greater impact on the ingredients in cement production, and fly ash is obtained from coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. With the development of the power industry, the discharge of fly ash from coal-fired power plants has increased year by year, becoming one of the largest industrial wastes in my country. If it is not treated properly, it will cause certain environmental pollution and waste of resources. Therefore, we propose fly ash to replace clay as the calibration raw material. Contents of the invention [0003] The purpose of the present invention is to provide a k...

AI Technical Summary

Problems solved by technology

If it is not treated properly, it will cause certain environmental pollution and waste of resources. Therefore, we propose fly ash instead of clay as the calibration raw material.