Building phosphogypsum powder thermal insulation material and preparation method thereof

Abstract

The invention discloses a building phosphogypsum powder thermal insulation material and a preparation method thereof. The thermal insulation material comprises the following ingredients: 40-50 wt% of building gypsum powder, 10-15 wt% of cement, 8-13 wt% of fly ash, 1-2 wt% of foaming agent, and 30-40 wt% of water. The preparation method comprises the following steps: (1) putting building gypsum powder, cement, fly ash and other solid raw materials in a mixer for dry mixing, putting a mixture of water and foaming agent in the mixer, and stirring to form an uniform slurry; (2) injecting the prepared gypsum foamed slurry in a mould; and (3) demoulding and carrying out maintenance to obtain a finished product. The thermal insulation material has the following advantages: (1) low unit weight, low thermal conductivity, thermal insulation, and energy saving property; (2) functions of fire resistance, sound resistance, and air humidity adjustment; and (3) reduction of storage quantity of industrial waste residues.

Description

technical field [0001] The invention belongs to the field of building thermal insulation materials, and in particular relates to a building phosphogypsum powder thermal insulation material and a preparation method thereof. Background technique [0002] The annual emission of phosphogypsum in my country is nearly 40 million tons. For a long time, due to the lack of appropriate standards to regulate the production of enterprises, most of the phosphogypsum has been discharged by enterprises as waste residue. A large number of phosphogypsum waste piles are distributed around the phosphate fertilizer enterprises, occupying a large amount of land and increasing the company's slag costs, and because phosphogypsum contains harmful substances such as phosphorus pentoxide, fluorine and free acids, long-term accumulation will also cause Cause surface water and groundwater pollution. Therefore, it is imminent to realize large-scale comprehensive utilization of phosphogypsum and eradic...

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Problems solved by technology

At present, the comprehensive utilization rate of phosphogypsum in my country is not high, and there is no technology to use gypsum to produce building insulation materials.

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