Advances in Modern Refractory Castables
摘要
Recent developments in terms of binding system, new material system, installation method and pre-cast shapes of refractory castables are introduced and discussed. In authors view, binding system is advancing on the one hand towards purification to minimize impurity components from binder materials, and on the other hand stabilization to minimize the structure destroy by volatility and decomposition of binder materials. Challenges of higher service temperature, slag resistance, clean steel production and better thermal shock resistance have promoted the booming of new varieties of castables including MgObased, natural flake graphite containing and non-oxides like Si3 N4, AlON and SiAlON containing castables. Installation technique is developing towards convenience,simplification and high efficiency. Advancement in installation and dry-out is of an incentive to the boost of selfflow castables, shotcreting castables, infiltration casting,quick dry-out castables and pre-cast shapes. Along with the increased adoption of pre-cast shapes of castables, the boundary between shaped and unshaped is becoming vague.