A Novel Inorganic Curing Foam for the Prevention of Spontaneous Coal Combustion and Its Characterization

Aiming at the shortcomings of traditional inorganic curing foam materials, this paper carries out process optimization and ratio selection of inorganic curing foam through orthogonal test and single factor experimental. The performance of the improved inorganic curing foam was also tested by compression test, flexural test, and thermal insulation test. The experimental results show that the curing layer of inorganic curing foam can effectively insulate the heat generated by the spontaneous combustion of coal. The surface temperature of the inorganic curing foam under different heat sources was below 30 degrees. With the increase of hydration reaction time, the compressive strength of the material increased continuously, and the maximum compressive strength reached 3.36 Mpa at 28 days. In addition, the formula for calculating the porosity of inorganic curing foam materials was theoretically derived, and a prediction model for the compressive strength was established based on the porosity calculation formula.