Decarburization of periclase-carbon and aluminum-periclase-carbon ladle refractories

In this paper, the processes of decarburization periclase-carbon and aluminum-periclase-carbon ladle refractories were investigated. Decarburization take place already at stage drying heating lining after repair, during its heat treatment on gas or electric stands. These cause irreparable damage to even before is put into direct operation (before contact with molten steel). One ways increase resistance carbon-containing against oxidation use antioxidants (Al, SiC, Si, etc.), which are introduced composition raw mixture manufacturing stage. Their action based priority compared carbon. Antioxidants act in a certain temperature range, opens up wide opportunities for development energy- resource-saving modes heat-treatment. The authors made mogravimetric analysis non-ignited resin-bonded AMC 78-8/7HG, RI-MC175LC (RI); MayCarb 284-AX (MAYERTON) grades used execution working layers steel linings. Thermogravimetric refractory samples was carried out LABSYS evo TG DTA DSC 1600 derivatograph when heated 1100 °C speed 15 °C/min. X-ray phase performed an XRD-6000 diffractometer. results thermogravimetric presented form derivatograms. It established that maximum rate carbon all cases reached 700 – 750 °C. Therefore, order implement low-carbonizing first recommended studied brands, including low-temperature (up 500 °C) exposure.