wanhaorefractory

  1. Properties of chrome corundum The main components of chromium corundum are Al2O3 and Cr2O3, which form a continuous solid solution. According to the Al2O3-Cr2O3 binary phase diagram, adding Cr2O3 to the Al2O3 single-phase material not only does not reduce the refractoriness of the material, but the refractoriness increases with the content of Cr2O3 increase and rise. When Cr2O3 is added to corundum material, as the temperature increases, Al2O3 and Cr2O3 gradually form a solid solution, so that the corundum particles and the matrix are closely combined, and a ring-shaped solid solution zone is further formed on the surface of the corundum particles, so that the particles and particles of the material can be formed at high temperature. In between, the particles and the fine powder are closely combined, and the combined phase is an aluminum-chromium solid solution phase with a high melting point, and the bond strength is maintained even at high temperatures, so the...

1. Causes of Leakage (1) Molten steel temperature is too high, and with strong oxidation; (2) The quality of refractory materials or ladle masonry is not good; (3) The quality of purging-plug at the bottom of ladle is poor; (4) Ladle slide gate plate or nozzle is not properly installed. 2. Accident Handling (1) When leakage occurs, the BOF must be lifted immediately to stop tapping; (2) At the same time, the steel ladle transfer car shall be driven away to avoid damage. (3) Lift ladle to the accident treatment area; (4) Inform the relevant personnel around the operation area to pay attention to the leaked ladle, and avoid it in time. 3. Prevention of ladle leakage (1) Check the ladle carefully; (2) Quality acceptance of refractory materials ; (3) Check the masonry quality of ladle working layer; (4) Used ladle before re-use, the residual steel slag must be removed under red hot conditions, and the erosion must be checked in detail; (5) When the ladle ...