... quality bauxite, coal etc. By ceramic sintering processing, oil fracturing proppant is a perfect substitute of natural quartz sand, glass ... 52MPa, 69MPa 86MPa high, medium and low intensity oil fracturing proppant, the main raw material is high quality bauxite from ... by the unique grinding and high temperature sintering,our oil farcturing proppant could bear high temperature, high pressure, has been ...