| 摘要 |
PURPOSE:To improve the corrosion resistance and spalling resistance of a refractory castable to a slag of a relatively wide basicity range, by adding specific binding material and gelling assistant to a refractory raw material composed mainly of zircon. CONSTITUTION:The objective castable can be produced by compounding (A) 50-95% (in terms of ZrO2:SiO2) of a refractory raw material composed of zircon and/or a zircon raw material with (B) 1-5% (in terms of solid) of colloidal silica having particle diameter of 0.01-0.02mum as a binding material, (C) 0.5-5% of alumina cement as a gelling assistant and, as necessary, (D) 3-40% of silica agalmatolite as a material for imparting residual expansibility, (E) a deflocculant (e.g. sodium tripolyphosphate), (F) 2-3% of vapor-phase silica fume and (G) <=2vol.% of stainless steel fibers. |
