Chemical formula : CaMg(CO3)2 Colour : Colourless, white, green, grey, brown, black Structure : Three directions of perfect cleavage Hardness on (on Moh's scale) : 3.5-4 Specific gravity : 2.8-2.9 Bulk density(tapped) gms/cc : 0.95-1.1 Ph balance : 9 Dispersibility : HG 5 - HG 4 Refractive index : 1.54 Mesh : 250 mesh ( 65 micron) 800 mesh (10 micron) Average particle size(micron) : 5.3-10.6 Relative density : 130-430 Oil absorbtion ml/ 100 gm : 20-18 Brightness : 90-96 % Matter in HCI : Powdered from effervesces weakly in dilute HCI CaCO3 : NIL- upto consumer requirement USES OF DOLOMITE POWDER RUBBER PRODUCTS: A huge market for dolomite is rubber industry manufacturing different products as footwears, container, etc. CONSTRUCTION: In a crushed manner it is used extensively in construction industry such as base of roads, aggregate in cement and filling in different manners. Rail road Ballast also invites huge usage of dolomite sand. AS A STRAINER: Used in hydro power plants to strain all the impurities from water when used as sand formation. THERMAL POWER PLANTS: Due to its high resistance to heat it is used in kilns for lining in the inside part and also exterior. CERAMIC INDUSTRY: Due to its hardness and high gravity it is used hugely in tiles and other ceramic based industries , as well as a sintering agent in iron ore pelletization and as a flux agent in steel making. CHEMICAL INDUSTRY: Due to use of MgO in pharma and other scientific purposes, dolomite is used in this industry also. Extraction of MgO from powder or chips os done through chemical processing by treating it with various acids.
