These products are typically formulated with dead-burned and fused magnesia and/or combinations of each. The specific MgO level and quality depends on the application and area of use.
NCR has developed a line of MgO-Chrome products in order to meet the requirements of the various production applications. The types of MgO-Chrome brick range from direct bonded brick to re-bonded and semi-rebonded brick that are based on combinations of high purity MgO, chrome ore and Fused MgO-Chrome raw materials. These products are formulated and fired to temperatures in excess of 1720oC to achieve excellent high temperature properties and corrosion resistance to meet the demands of the various production processes.
Top-Line XF: These products are based on high purity MgO, synthetic fused spinel and/or alumina. Two types of fused spinel materials used are (1) based on MgO and Al2O3 or (2) Alumina and iron oxide (Hercynite). Fired brick made with combinations of these raw materials have excellent thermal mechanical properties and are compatible with the cement production process conditions.
Top-Line MF: A fired Magnesia Spinel brick that is formulated with high purity MgO and synthetic fused Hercynite spinel (Alumina – Iron oxide spinel). This product has good thermal mechanical properties and good coating characteristics. In addition the product has low permeability which makes it resistant to infiltration by alkali salts and cement liquid phases. Top-Line MF is recommended for the burning and upper transitions zones of cement kiln.
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