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辽宁镁矿公司与武钢合作,于1988年完成了新型平炉炉顶砖(ML Ge-85)的试验研究工作。研究工作表明,在方镁石一尖晶石(MgO-MgO·Al_2O_3)系耐火材料中加入适量的Cr_2O_3,可促进烧结,其显微结构得到明显改善,从而提高了制品的使用性能。从1991年6月开始,武钢一炼钢六座大型平炉主炉顶已全部使用ML Ge-85砖,炉顶寿命显著提高,平均寿命347次,1992年1
Liaoning Magnesium Corporation, in cooperation with WISCO, completed the experimental research on a new hearth brick (ML Ge-85) in 1988. The research shows that adding appropriate amount of Cr 2 O 3 to the refractory of periclase-spinel (MgO-MgO · Al 2 O 3) can promote the sintering, and the microstructure of the refractory is obviously improved, thus improving the serviceability of the product. Beginning in June 1991, ML Ge-85 bricks have been used for all six large-scale hearth furnace tops in WISCO First Steel. The roof life has been significantly improved with an average life of 347 times.