經過揀選、破碎、磨細到325-1250目**成為白云石粉，在摩擦材料中，其作用與輕鈣粉性能基本相同。經表面改性劑改變白云石粉表面堿性，提高其與橡膠摩擦材料制品的結合性能從而大大增加其補強性能。由于其開采容易，成本低廉，在作為摩擦材料的填料當中被廣泛采用。

Dolomite powder

Dolomite powder is sorted, crushed, grindedto 325-1250 Mesh , in the friction material, its role is basically the samewith the light calcium powder performance. after surface modification agent tochange the white surface alkaline powder, improve and rubber friction withproperties of materials so as to greatly increase the reinforcing properties.Because of its mining easy, low cost, is widely used in friction as filler.