Refratario containing aluminum oxinitreto refratario for a sliding nozzle, and nozzle for fundicao continues began

摘要

The new refractory contg. aluminium nitride oxide comprises aluminium nitride oxide (I) (3 parts by weight or more), a carbon and/or a carbonaceous compound (II) (0.5-60 parts by weight), and other refractories (III) and/or binding agents (IV) (the remaining parts by weight). (I) is a solid solution of aluminium nitride (AlN) and alumina (Al2O3). (II) can be chosen from coke, carbon black, synthetic or natural graphite, etc. and its weight is at most 15% of the total. (III) (1-10 wt.%) includes one or moer of metallic silicon, ferrosilicon, aluminium powder. (IV) (if used, 2-15 wt.% preferably 4-7 wt.%) includes one or more of organic binding agents such as phenol resin, furan resin, pitch, etc.. A typical refractory consists of (I) (3-40 parts by weight), graphite and/or silundum (0.5-60 parts by weight) and sintered alumina (the rest). The refractory for a sliding nozzle must contain 10-95 wt.% of (I) and has a typical composition of (I) (10-89 wt.%), sintered alumina (29-79 wt.%), carbon powder (less than 15 wt.%), silicon powder (1-10 wt.%) and phenol resin (2-15 wt.%). The refractory for a nozzle for continuously casting steel must contain 3-60 wt.% of (I) and 10-40 wt.% of carbon or graphite. A typical composition of (I) (5-58 wt.%), graphite (24-27 wt.%), alumina (15-65 wt.%), silundum (3 wt.%) and phenol resin (11 wt.%).