Sealing injection apparatus for injecting substances into...

Details Sealing injection apparatus for injecting substances into... Sealing injection apparatus for injecting substances into...

C - Chemistry, Metallurgy

21

C

39/105

C21C 7/00 (2006.01) C22B 9/05 (2006.01) C22B 9/10 (2006.01)

Patent

CA 1315101

Abstract: "IMPROVEMENTS IN SEALING INJECTION APPARATUS FOR INJECTING SUBSTANCES INTO MOLTEN METALS" Apparatus (110) for injecting substances into molten metal includes a nozzle block (111) for installation in the wall of a vessel, the nozzle block having at least one initially-closed injection passage and an injectant pipe (114) movable in the passage and advanceable to open the passage for injection to commence. Melt-arresting means (135) are provided in the vicinity of the respective dis- charge ends of the pipe and passage to limit run back of molten metal in a space between the lance pipe (114) and the passage when the pipe has been advanced to its injection position, the arresting means (135) defining a clearance which affords ad- vancing movement of the pipe but is so small as to prevent significant flow of metal through the clearance. In case melt is not arrested by the arresting means (135), a compressible melt-impervious seal means (127) is provided adjacent an outer end of the pipe.

563623

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