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A new system for pouring steel from ladle into tundish : contract no. 7215-PP/015, 1 July 1998 to 31 December 2000 ; final report

出版	Office f. Official Publ. of the Europ. Communities, 2002
ISBN	92894344149789289434416
URL	http://books.google.com.hk/books?id=323YAQAACAAJ&hl=&source=gbs_api

註釋The aim of the project was to re-engineer, develop and test a new sytem to pour liquid steel from ladle to tundish. Casting shroud over pressurisation is induced with respect to atmosphere, beneficial for product quality (no steel re-oxidation), and cast saving (reduction of refractory costs and maintenance by eliminating the slide gate). Partners were Vesuvius, refractory systems designer and maker, Ugine and Acciai Speciali Terni (AST), to allow and support direct application of the solutions proposed, 'reverse stopper' and 'LS rotor', respectively ; CSM, project coordinator, and IRSID as R & D support partners contributing to systems enhancement and studying with model investigations their behaviour on plant. As a result of the work, positive and engative points were assessed. - 'Reverse stopper' use proved to be successful on 30 % of tests at Ugine. Moreover, the IRSID modelling study with this system gave results that were not encouraging, highlighting problems of slag entrapment affecting stell cleanliness. - The former 'LS rotor' configuration was enhanced with CSM cold model studies up to a design giving no steel splashing in the tundish. But the modifications proposed were evaluated as being too expensive to allow its industrial realisation. Therefore, no casting tests were made on plant. Anyway, the LS manipulator for rotor equipment was succesfully tested at AST and is currently used on plant. The negative points severely affected the industrial application and potential saving of the concept. Therefore, to avoid spending more money, it was proposed and agreed with the Commission to stop research at the end of 2000.