Dolomite Lumps, SiO2 : 1-3%

Dolomite lumps are a common sedimentary rock and Udaipur, Rajasthan is rich in this mineral. Dolomite lumps is the cheapest filler any company can add to its products. It has neutral to low Ph, less reactivity and abundantly available.

DOLOMITE lumps are a double carbonate of calcium and magnesium, (CaMg(CO3)2). it contains 30.4% of CaO, 21.7% of MgO and 47.9% of CO2.

Dolomite is widely used in Iron Steel Industries, construction and building products, paints, plastics, rubber, soaps and detergent applications, Glass and ceramic industry as a source of magnesium, sintering agent in iron ore pelletization or as a flux agents in steel making.

Chemical Formula: CaCO3 MgCO3

Sr. no. Component Percentage
1. CaCO3 53.6
2. MgCO3 42.0
3. CaO 31.7
4. MgO 20.5
5. Fe2O3 0.30
6. SiO2 5.50
7. Al2O3 0.50

Dolomite has properties same as the mineral calcite, but it does not rapidly dissolved in dilute hydrochloric acid because of lesser percent of carbonate presence.

Dolomite lumps are slightly harder, denser and never forms scalenohedrons.
Dolomite decomposed completely above at 900ºC The product resulting from this relatively low-temperature and calcination is highly porous and reactive and is known as ‘calcinated dolomite’.