Apparatus for injecting solid particulate material into a...

Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By means introducing treating material

Reexamination Certificate

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C266S268000, C266S241000

Reexamination Certificate

active

08003044

ABSTRACT:
A metallurgical lance (27a) to extend through an opening in the wall of a smelting vessel barrel (16) and into the interior space of the vessel. Lance (27a) includes a central core tube (31) through which to pass solid particulate material into the vessel and an annular cooling jacket (32) surrounding the central core tube (31) throughout a substantial part of its length. Lance (27a) has a mounting structure (61) comprising an outer annular part (60) extended about cooling jacket (32) and about twice the diameter of the cooling jacket. The outer annular part (60) fits within a tubular lance mounting bracket (62) welded to the shell (16a) of vessel barrel (16) to extend outwardly from the vessel. The lance is held within mounting bracket (62) by clamping bolts acting between flanges (63,65) on the outer annular part (60) and mounting bracket (62). The outer annular part (60) is double walled and the interior space between its walls is divided into water flow passages through which cooling water flows from a water inlet (68) to an outlet (69).

REFERENCES:
patent: 3418109 (1968-12-01), Stone
patent: 6245285 (2001-06-01), Dry et al.
patent: 6398842 (2002-06-01), Dunne
patent: 6400747 (2002-06-01), Mathur
patent: 6565800 (2003-05-01), Dunne
patent: 7445747 (2008-11-01), Williams et al.
patent: 2001/0015516 (2001-08-01), Dunne
patent: 2006/0071376 (2006-04-01), Williams et al.
patent: 993 172 (1965-05-01), None
P.C. Mathur, “CoJet™ Technology-Principles and Actual Results from Recent Installations,” AISE Steel Technology, vol. 78, No. 5, May 2001, pp. 21-25.

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