cenospheres for drilling

The material of our product cenospheres as lightening agent for drilling are from fly ash after coal combustion. Components containing silicon form spheres during combustion. We choose cenospheres as lightening agent for drilling through floating sort method. The big grains, grains containing carbon which are not burned sufficiently and grains which are broken and bibulous will sink into the bottom of pond. A few grains which have lower density than water will float on the surface of water. We collect the floating grains and get cenospheres as lightening agent for drilling after the grains are air-dried and screened.