Desulfurization gypsum basic steel slag composite gelled material and preparation method thereof

Abstract

The invention relates to a desulfurization gypsum basic steel slag composite gelled material and a preparation method thereof. The desulfurization gypsum basic steel slag composite gelled material comprises the following raw materials by weight percentage: 65-95 of desulfurization gypsum, 5-35 of steel slag and an exciting agent of 0.1-5 of the total weight of the desulfurization gypsum and the steel slag, wherein the summation of the weight percentages of the desulfurization gypsum and the steel slag is 100 percent. The preparation method of the composite gelled material comprises the following steps: sifting the steel slag and the desulfurization gypsum for filtering out large grains and pouring the steel slag and the desulfurization gypsum into a material mixing pot for mixing for 20-30 minutes; gauging a standard consistency water consumption of water and pouring the water into an agitator kettle for standby; then weighing the exciting agent, adding the exciting agent to the mixture of the desulfurization gypsum and the steel slag by a first mixing method or a simultaneous mixing method and uniformly mixing the mixture; and agitating, molding and maintaining the mixed materials to obtain the composite gelled material. The method combines two industrial wastes so as to sufficiently improve the utilization rate of the steel slag and the desulfurization gypsum, change the wastes into valuables and also form the gypsum material with good heat preservation, heat insulation and sound insulation performance.

Description

technical field

[0001] The invention relates to a desulfurized gypsum-based steel slag composite cementitious material and a preparation method thereof, belonging to the technical field of building materials. Background technique

[0002] With the implementation and advancement of flue gas desulfurization projects in power plants, a large amount of desulfurization by-product - desulfurization gypsum has been produced. It is estimated that in recent years, the annual output of flue gas desulfurization gypsum in China will reach about 20 million tons. Therefore, it is of great significance to study desulfurized gypsum and its application in the building materials industry from the perspective of resource utilization and sustainable development. Desulfurization gypsum is a very good building material resource. Its particles are fine and the particle size distribution is relatively concentrated. The crystals formed by hydration are relatively regular. The content of calcium sul...