Lightweight fireproof heat-insulation casting composite material and preparation method thereof

The invention relates to the technical field of fireproof materials, in particular to a light fireproof heat-insulation pouring type composite material and a preparation method thereof.The light fireproof heat-insulation pouring type composite material comprises light filler, an inorganic binding material, a reinforcing material, a fluxing agent, a foaming agent, a retarder and water, the fluxing agent comprises zinc borate and low-melting-point glass powder, and zinc borate in the material has a good flame retardant effect and also has a good heat insulation effect; the material has a low melting point, can form a liquid phase with low-melting-point glass powder at a high temperature, can be used as a connecting bridge to tightly connect the light filler, the inorganic binding material and the reinforcing material to form a compact thermal insulation layer, and is not easy to collapse and fall off after being heated at a high temperature for a long time; good fireproof and heat insulation effects are achieve