STRUCTURE FOR CONSTRUCTING REFRACTORY IN RH-DEGASSING VESSEL BOTTOM, RH-DEGASSING VESSEL AND METHOD FOR MANUFACTURING REFRACTORY BLOCK

摘要

PROBLEM TO BE SOLVED: To provide a method for preventing breakage and float-up of a block from being caused in a comparatively simple structure by using monolithic refractory as a pre-cast block which is easily dried and a method for manufacturing the pre-cast block used for the same.;SOLUTION: This refractory constructing structure for RH-degassing vessel bottom, is provided with refractory blocks constituting a center block 2 held between two circulating-flow tubes 1, circulating-flow tube tuyeres 3 surrounding the circumference of respective circulating-flow tubes and the other bed parts 6, and the monolithic refractories filled up the gaps and/or the surrounds of these refractory blocks, and the refractory block constituting the central block held between two circulating-flow tubes, has a widening downward reverse jack structure. The vessel bottom central part is lower by ≥30 mm than the circumference and a gap with the block is filled up with the dry-type monolithic refractory. The block is manufactured by partitioning the inner part of a large molding flask with plates.;COPYRIGHT: (C)2004,JPO