Research on Cr2O3-Reinforcement High Quality Magnesia-Chrome Brick
The raw material is the fused grain magnesia-chrome and Indian concentrated chrome ore . The grain size proportion which is used in the preparation as follows: 4-1mm 50%，≤1mm 17%,≤0.088mm 33% ,the 5 group samples are prepared by respectively adding extra 2%、4%、6%、8% fine power Cr2O3 to basic formula .Mixing and pressed under 200Mp and sintered at 1750,holding 8 hours ,the process of preparation of samples is finished .The dimension of samples is 230mm×114mm×65mm .Conclusion: the addition of fine power Cr2O3 can change the base material composition of magnesia-chrome ,form more secondry spinel and intergranular spinel ,promote direct bond between periclase and spinel .Adding quantitative fine power Cr2O3 can enhance the room properties and high temperature properties ,but as the increase of fine power Cr2O3 ,the sintering property is decreased ,the results are shown that the best content of fine power Cr2O3 should remain at about 4% .
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
Y. Li et al., "Research on Cr2O3-Reinforcement High Quality Magnesia-Chrome Brick", Advanced Materials Research, Vols. 233-235, pp. 2565-2570, 2011