Top submerged injection with a shrouded lance

Details Top submerged injection with a shrouded lance Top submerged injection with a shrouded lance

F - Mech Eng,Light,Heat,Weapons

27

D

F27D 3/16 (2006.01) C21C 5/46 (2006.01) F27D 3/18 (2006.01) C21C 5/56 (2006.01)

Patent

CA 2066455

A lance (14) comprising a first elongate tube (28) extending through an elongate tubular shroud (30), is used for top submerged injection of a fluid such as air (possibly including oil or particulate coal) into a liquid pyrometallurgical bath (18) comprising slag or having slag on its surface. The first tube (28) defines a duct (38) for the flow of the fluid. The shroud (30) defines a flow passage (40) for a coolant such as air. The shroud (30) terminates above the lower end portion of the first tube (28). In use, the coolant cools the lance (14) and discharges above the bath (18) when the outlet of the first tube (28) is inserted into the bath (18). A furnace installation (10) com- prises a lance (14), a furnace (12), and a lowering means (32).

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