The closed hole perlite produced by the perlite expansion electric furnace, also known as glassy microsphere, is the preciously control of the temperature and the time of the raw material in the expansion furnace. The product surface is melted, the air hole is closed, the spherical body is fine particles, the internal porous cavity structure, the surface is closed, the gloss is smooth, the physical and chemical properties are stable, and the quality is high.

Closed hole perlite vitrified microbead expansion furnace mainly used for producing new perlite expanded vitrified microsphere which surface is vitrified and with center hollow and vitrified hollow perlite