A steelmaking furnace is cleaned and maintained using a lance which includes an elongated lance body including at least one first nozzle opening proximal to an end that extends into the furnace and at least one other second nozzle opening spaced upwardly from the first nozzle opening. Structure defines at least one passageway extending through the body to the first nozzle opening and to the second nozzle opening. Gas supply means selectively introduces different gases into the passageway. The lance apparatus can be operated to emit either different gases or the same gas from the first and second nozzle openings at the same time. The gases emitted include an oxygen-containing gas and a gas that includes an inert gas.
申请公布号
US5865876(A)
申请公布日期
1999.02.02
申请号
US19960767994
申请日期
1996.12.13
申请人
LTV STEEL COMPANY, INC.;BERRY METAL CO
发明人
WATKINS, RICHARD R.;GOODSON, KENNETH M.;RYMARCHYK, JR., NICHOLAS M.