Vermiculite is a natural, non-toxic mineral substance that expands under high temperatures. It is a relatively rare mineral belonging to the silicate group. After high-temperature calcination, raw vermiculite flakes can rapidly expand several to dozens of times their original volume. The expanded vermiculite is called expanded vermiculite, and its common particle size specifications include 0.5-1mm, 1-3mm, 2-4mm, 3-6mm, 1-6mm, etc. Additionally, other particle size models can be produced according to customer production needs. Vermiculite powder is made from raw vermiculite ore through high-temperature calcination, screening, and grinding into a powder form. The main models include 20-40 mesh, 40-60 mesh, 60-80 mesh, 200 mesh, and 325 mesh.

Spreading expanded vermiculite on rooftops can provide excellent thermal insulation, keeping buildings warm in winter and cool in summer. Using vermiculite bricks to construct partition walls in high-rise buildings can achieve soundproofing, fire resistance, and moisture protection, while also reducing the load on the floors.