Common products of dolomite
The main use of Chinese converter lining with tar dolomite brick and tar bonded magnesia dolomite brick, some factories use light burning oil and oil fired magnesia dolomite brick in vulnerable parts. Western Europe and Japan and other countries mainly use tar converter with heat treatment and sintering in dolomite brick and magnesia dolomite brick. In addition, burned magnesia dolomite brick is used in some oil refining furnace lining.
Dolomite is the salt of calcium carbonate and magnesium carbonate, the molecular formula is CaCO3 MgCO3, the six party system, the proportion of 2.80 to 2.99, Mohs hardness of 3.5 ~ 4.5, the theory of MgO21.87%, composed of CaO30.41%, CO247.72%, CaO/MgO ratio is 1.39. Dolomite is rich in resources and of good quality in China. Its composition is shown in table 1. Since twenty-first Century, in addition to making bricks prepared by natural dolomite sand, with water and lime to the synthetic magnesium dolomite sand, making magnesia dolomite brick.
Refractory materials made of dolomite brick by calcined dolomite sand products. Usually containing calcium oxide (CaO) more than 40%, more than 35% of Magnesium Oxide (MgO), also contains a small amount of silicon oxide (SiO2), alumina (Al2O3) and ferric oxide (Fe2O3) and other impurities. Natural dolomite than CaO/MgO fluctuations, if the bricks in the CaO/MgO less than 1.39, it is called magnesia dolomite brick. According to dolomite brick production process can be divided into: tar (Li Qing) combined with brick, brick and light burning oil burning oil brick. Dolomite brick containing free CaO, easy to water bursting in the air, not long-term storage.
