Preparation method of solid waste-based insulation board for building

The invention discloses a preparation method of a solid waste-based insulation board for a building. The method comprises the following steps: S1, uniformly mixing fly ash with calcium bentonite, a pore-forming agent, a binder, water and a forming agent to obtain a mixed material; step S2, carrying out aging treatment on the mixed material; s3, performing pugging treatment on the mixed material subjected to the aging treatment to obtain a fly ash base; step S4, performing tabletting molding on the fly ash base to obtain a fly ash base blank; step S5, carrying out drying treatment on the fly ash-based green body; and step S6, roasting the dried fly ash-based green body to obtain the fly ash-based insulation board. The fly ash-based insulation board provided by the invention is simple in manufacturing process, the used raw materials are environment-friendly and pollution-free, the compressive strength is high, and the thermal insulation performance is good.