Porous painted pottery microspheres based on ceramic wastes and preparation method thereof

The invention discloses a preparation method of porous painted pottery microspheres based on ceramic wastes. Ceramic raw materials mainly come from waste house building ceramics, sanitary ware ceramics, craft ceramics and the like. The pore channel growth is accurately regulated and controlled by adopting a twice pore-forming technology. Firstly, primary pore forming is carried out on a ceramic material by a high-temperature foaming agent, high-temperature in-situ coloring of an inorganic pigment is assisted, and then pore channels of the ceramic material are regulated and controlled by caustic alkali etching, so as to obtain the colored light ceramic microspheres with a large porosity range (60-90%) and developed pore channels (micro-nano pore diameter of 70-90%). The porous painted pottery microspheres obtained by the invention can be used in the fields of high-grade reflective thermal insulation materials, sound insulation materials, catalysts, wastewater treatment and the like, andhas good economic value