What is the dark ball used to blast glass?
The dark ball is called emery sand,is a new eco-friendly blasting material, with the raw material of bauxite, coal and so on. It is applied in Glass sandblasting and Abrasive tools. It is the substitute for Middle and low-intensity sand such as Quartz sand, glass balls, and metallic balls.
AVERAGE CHEMICAL COMPOSITION(TYPICAL)
Al2O3 60-70%
SiO2 6-10%
Fe2O3 2-5%
TiO2 1.5-2%
MnO 3-5%
K2O 1-2%
CaO 1-2%