Phosphogypsum-based self-gas-generating expansion slurry fire-preventing and fire-extinguishing material and preparation method thereof

Abstract

The invention discloses a phosphogypsum-based self-gas-generating expansion slurry fire-preventing and fire-extinguishing material and a preparation method thereof. The slurry material is composed ofthe following raw materials: 55 to 60 parts of phosphogypsum, 25 to 30 parts of water, 8 to 9 parts of cement, 0.07 to 0.18 part of polyoxyethylene alkylamine, 0.7 to 0.9 part of hydroxyethyl cellulose, 0.22 part of acrylic acid, 0.39 part of sodium methallyl sulfonate, 0.01 part of ammonium persulfate, 3.4 to 4.0 parts of sodium bicarbonate and 0.3 part of silica fume. The preparation method comprises the following steps: adding polyoxyethylene alkylamine and acrylic acid into water, and carrying out stirring to form a mixed solution; then adding cement, hydroxyethyl cellulose, ammonium persulfate, sodium methallyl sulfonate, silica fume and sodium bicarbonate into the phosphogypsum, and carrying out stirring to form mixed powder; and finally, adding the mixed powder into the mixed solution, and carrying out stirring to prepare expansion slurry. The phosphogypsum used in the material is industrial waste residues, so resource reutilization is achieved; the prepared slurry is good in liquidity and high in compressive strength; and carbon dioxide generated through a reaction enables the slurry to expand, so fire preventing and extinguishing effects are achieved.

Description

Technical field [0001] The invention relates to a phosphogypsum-based self-produced gas expanding slurry fire-extinguishing material and a preparation method thereof, and belongs to the field of fire-extinguishing material preparation. Background technique [0002] Coal spontaneous combustion is the main form of mine fires, and the fissures as oxygen supply channels provide conditions for spontaneous combustion. In view of the complex situation of intersecting fissures, the use of fire-extinguishing materials is one of the effective measures to prevent spontaneous combustion of coal. The cracks are usually sealed by pumping the medium. Among the existing fire-fighting materials, the ammonium salt gel material has a high viscosity and cannot be sprayed to a far area; the high polymer gel material has a higher cost and poor permeability, which results in a poor air plugging effect; another The conveying foam medium for sealing cracks, such as three-phase foam, can form three-dime...

AI Technical Summary

Problems solved by technology

However, phosphogypsum contains impurities such as free phosphoric acid and fluoride, and a large amount of accumulation will cause pollution and seriously increase environmental risks.

Images