... density sand for exploring more oil and gad ,which oil and gas wells needs most Ceramic Proppant is divided into 52Mpa, 69Mpa, 86Mpa ... ,and 103Mpa three series, according to bulk density,Ceramic Proppant is divided into: low-density, medium ... 30-50 mesh, 40-60 mesh, 40-70 mesh and so on. Ceramic Proppant is the key material in low-permeability fracturing ...