Environment-friendly, high-intensity and desulfurated plaster wall brick and manufacture method thereof

Abstract

The invention discloses an environment-friendly, high-intensity and desulfurated plaster wall brick and a manufacture method thereof. The environment-friendly, high-intensity and desulfurated plaster wall brick comprises the raw materials of desulfurated plaster, powdered coal ash, calcined lime, coagulating agent and crystal-converting agent. The manufacture method of the plaster wall brick comprises the following steps of: preparing the raw materials, stirring in a mixing way, clearing up and aging, rolling and mixing, compressing and forming, and autoclaving and maintaining. The content (quality) range of each component is as follows: 65%-75% of desulfurated plaster, 19%-30% of powdered coal ash, 4%-5% of calcined lime, 0.8%-1.2% of coagulating agent and 0.2%-0.4% of crystal-converting agent. The step of compressing and forming is performed by a mould pressing type press machine, wherein the compressing pressure is larger than 20MPa; and the autoclaving and maintaining constant temperature is 130-150 DEG C, and the time of the constant temperature is 5-7h. The environment-friendly, high-intensity and desulfurated plaster wall brick has the advantages of high intensity, low density, low conductivity factor, good water resistance and good performance, and has large solid waste using quality.

Description

technical field [0001] The invention relates to a utilization method of flue gas desulfurization gypsum, an industrial solid waste, in particular to an environment-friendly high-strength desulfurization gypsum wall brick and a production method thereof, belonging to the technical field of building materials. Background technique [0002] Desulfurization gypsum is a by-product of the coal-fired industry and a chemical by-product of flue gas desulfurization. It is mainly composed of calcium sulfate with two crystal waters, that is, gypsum (content greater than 90%). [0003] my country is a large coal-burning country, and coal-fired power generation accounts for 80% of the total power generation. However, coal-fired emissions will emit a large amount of flue gas containing sulfur dioxide, which seriously pollutes the environment. Therefore, the country mandates that thermal power plants and other large coal-fired equipment must be installed For flue gas desulfurization equipmen...

AI Technical Summary

Problems solved by technology

However, the utilization rate of desulfurized gypsum in the calcined-free desulfurized gypsum brick is low, and the weight ratio of the desulfurized gypsum in the gypsum brick is only 25%-35%, which cannot realize the purpose of utilizing solid waste desulfurized gypsum in large quantities; the density is high, and transportation and use Inconvenient; and poor thermal insulation effect

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