Dolomite brick and magnesia dolomite brick

The main component of dolomite is calcium magnesium carbonate. Mohs hardness (MOH) is between 3.5 and 4.

Dolomite brick is made as refractory products from calcined dolomite sand. Generally dolomite bricks has more than 40% CaO, more than 35% MgO and some SiO2, Al2O3, Fe2O3 and some other impurities. The ratio of CaO/MgO in natural dolomite is little large. If the ratio of CaO/MgO is less than 1.39, it will be called magnesia dolomite refractory brick.

In China, Chinese mainly use resin bonded dolomite brick and resin bonded magnesia dolomite brick for converter furnace . Some factories use light burning oil and oil fired magnesia dolomite fire brick in easily damaged part. In Western Europe and Japan, people usually use resin bonded and oil fired dolomite brick and magnesia material dolomite brick for their converter furnace. Besides, magnesite dolomite bricks also can be used for lining of some refining furnaces.