| 摘要 |
PURPOSE:To prevent the elution of vitreous material into moisture, to obviate the deterioration of workability in kneading and to produce a sufficient effect of the vitreous material itself by coating the vitreous material for preventing the oxidation of carbon in the refractory with a resin having a high content of fixed carbon by prilling. CONSTITUTION:Borosilicate glass having <=0.1mm grain size is mixed as the vitreous material into molten pitch, the mixture is granulated by prilling using a pressurized nozzle-type granulator to obtain granules having <=0.5mm size. The granules are added into the refractory material by 1-20wt.%, and a refractory contg. non-oxides is obtained. Electric conductivity is not increased due to the elution of the vitreous component in this refractory, the fluidity is not deteriorated, the serviceable time is not shortened, and the workability is not deteriorated. |
