Magnesia-Chrome Refractories and the manufacturing method thereof

摘要

The invention and more sex for vacuum degasser magnesia - chrome relates to the quality refractories , its configuration is , MgO 72-74 wt %, Cr ₂ O ₃ 16-18 wt% , the flux component of the Al ₂ O ₃ , Fe ₂ O ₃ , SiO ₂ and extrapolated to a mixture having a CaO -containing ratio of 10 % by weight of the sum of a 0.01 ~ 0.075mm size of the Cr ₂ O ₃ is 2-3 % by weight of powder is added to the calcined composition . Magnesia with the configuration of the above- chrome quality refractory partial pressure of oxygen in a high vacuum condition 10 ^-10 torr or less with high carbon steel operations in low basicity ratio is close to 1 in the MnO content is high CaO-MnO-SiO ₂ , because the contents of the system Last excellent slag has the effect of increasing the service life can be achieved cost savings .