Dihydrate desulfurized gypsum water-resistant putty for interior and exterior walls, and production method thereof

Abstract

The invention provides a dihydrate desulfurized gypsum water-resistant putty for interior and exterior walls, and a production method thereof, and relates to a desulfurizing technique of smoke gases from an electric power plant, belonging to the field of resource comprehensive utilization. Industrial byproduct gypsum generated during the desulfurizing technique of the smoke gases from the electric power plant can be modified without calcining. The dihydrate desulfurized gypsum water-resistant putty is composed of the following components: 45-75% of a composite cementing material, 5-10% of an early strength agent, 25-35% of filler, 0.2-0.4% of a water retention agent, 1.5-2.5% of an adhesive and 0.3-0.5% of a flexibilizer. The composite cementing material is composed of the following components: 65-75% of dihydrate desulfurized gypsum, 20-25% of an active material, 5-15% of an excitation material and 0.5-2.0% of a coagulation accelerating material. The production method comprises the following steps of: metering and mixing oven-dried or air-dried dihydrate desulfurized gypsum with the active material, the excitation material and the coagulation accelerating material according to a certain proportion to obtain the composite cementing material; and metering and mixing the composite cementing material with additives including the early strength agent according to a certain proportion. The dihydrate desulfurized gypsum water-resistant putty has the advantages of high flexural strength and compressive strength, high water resistance and low cost. The technique develops a novel way for the utilization of dihydrate desulfurized gypsum.

Description

technical field [0001] The invention belongs to the technical field of desulfurization gypsum, the solid waste produced by flue gas desulfurization in power plants, turning waste into treasure, developing circular economy, low-carbon economy and comprehensive utilization of resources. It specifically relates to a kind of desulfurization gypsum produced by desulfurization in thermal power plants. It does not undergo traditional calcination and grinding, but directly undergoes modification to make it fully hydrated, resulting in a qualitative leap, from air-hardening materials to hydraulic. , gelling materials, and then add various admixtures to produce dihydrate desulfurized gypsum putty for interior and exterior walls. Its advantages: less initial investment, quick results, low cost, no pollution, energy saving; the product has good water resistance, good flexibility, and is not easy to hollow and crack. Background technique [0002] my country is a big country of thermal p...

AI Technical Summary

Problems solved by technology

The problems brought about: large investment, low output, and poor benefits; secondly, secondary pollution and secondary energy consumption; thirdly, low product strength, poor water resistance, and short operating time; fourthly, high cost and poor quality Stable, narrow scope of application

[0005] At present, during the inspection, no application materials for invention patents of similar technologies have been found