It is widely used in the exploitation of oil and gas, the increase in oil and gas production, and supporting the ground without sinking. Fracturing technology is an important means to transform oil and gas fields, it is the use of artificial methods of fluid injected into the rock to the grassroots level to exceed the pressure formation fracture strength, so that cracks around the wellbore rock layer, forming a high-flow capacity of the channel has. In order to maintain open after fracturing the formation of cracks, oil and gas product can smoothly through the injection of particulate proppant is one of the important measures. 

Size：12/18mesh, 16/20mesh, 16/30mesh, 20/40mesh, 30/50mesh, 40/70mesh,

Typical values： 

bulk density：1.85g/cm3 max; 

roundness: 0.9 

sphericity: 0.9 

crush resistence:69MPa: 3%max; 

acid solubility: 5max