... grinding, mixed with various additive, then refined, granulation.Oil fracturing proppant is a perfect substitute of natural quartz sand, glass ... /69MPa/86MPa/100MPa high, medium and low intensity oil fracturing proppant. By the unique grinding and high temperature sintering, ... , 16/30mesh, 20/40mesh, 30/50mesh, 30/60mesh, 40/60mesh, 40/70mesh, 70/140mesh, etc. Production Process of oil ceramic sands: 1 ...