| 摘要 |
<P>PROBLEM TO BE SOLVED: To reuse a used refractory generated from a tundish in a continuous casting facility as a sub-raw material in a steelmaking refining process. <P>SOLUTION: The method for reusing the used tundish refractory includes: defining Al<SB>2</SB>O<SB>3</SB>-SiO<SB>2</SB>based refractory as a work refractory 4; recovering the used refractory generated from the tundish 1 for continuous casting, covered with a coating layer 5 of MgO on the surface of the work refractory; crushing the used refractory into particles having ≤30 mm particle diameter; separating the crushed used refractory, by using a sieve, into the fine particles having ≤10 mm particle diameter and the rough particles having >10 mm to ≤30 mm particle diameter; and using the fine particles obtained by sieve-separation as a slag-making agent in the decarburize-refining of molten iron in a converter. <P>COPYRIGHT: (C)2010,JPO&INPIT |
