US 7,591,876 B2
	Injection of solids into liquids by means of a shrouded supersonic gas jet
Andrew Miller Cameron, Tansley (United Kingdom); and Christian Juan Feldermann, Banyoles (Spain)
Assigned to The BOC Group plc, Windlesham (United Kingdom)
Appl. No. 10/512,187 PCT Filed Apr. 15, 2003, PCT No. PCT/GB03/01603 § 371(c)(1), (2), (4) Date May 25, 2005, PCT Pub. No. WO03/091461, PCT Pub. Date Nov. 06, 2003.
Claims priority of application No. 0209365.6 (GB), filed on Apr. 24, 2002.
Prior Publication US 2005/0229749 A1, Oct. 20, 2005
This patent is subject to a terminal disclaimer.
Int. Cl. C22B 9/05 (2006.01); C22B 9/10 (2006.01); F27D 3/18 (2006.01); C21C 7/072 (2006.01)

U.S. Cl. 75—530  [75/533; 266/225]

7 Claims

1. A method of introducing a solid particulate reagent into a bath of metallurgical liquid, comprising: introducing a solid particulate reagent into a main supersonic gas jet, directing the main supersonic gas jet at a surface of the bath, and surrounding the main supersonic gas jet with a jet of shrouding gas, characterized in that the shrouding gas jet is ejected from a converging-diverging nozzle at supersonic velocity, the main supersonic gas jet is at a first velocity and the shrouding gas jet at a second velocity, the second velocity being equal to or greater than the first velocity, and the shrouding gas jet comprises a burning hydrocarbon fluid fuel.