| 摘要 |
<p>1,194,458. Tundish nozzles. DRESSER INDUSTRIES Inc. 15 Oct., 1968 [30 Oct., 1967], No. 48766/68. Heading F4B. A tundish nozzle used in a continuous casting process consists of ceramically bonded zirconia or zircon partially impregnated with non- colloidal particles of chromic oxide, zirconia or zircon. It has a porosity between 10% and 30% and a pore diameter between 5-100 microns. The non-colloidal particles are from 0À1-5 microns in size and the impregnation extends to a depth of at least <SP>1</SP>/ 16 in. The impregnation is produced by immersing the fired nozzles in a water suspension of the given particles and agitating or vibrating the suspension.</p> |
