公开(公告)号：ZA200006972B

公开(公告)日：2001-06-05

申请号：ZA200006972

申请日：2000-11-28

Applicant: TECH RESOURCES PTY LTD

Inventor： MCCARTHY CAROLYN ,  JAMES DRY RODNEY ,  DAMIAN BURKE PETER

IPC: C22B5/10 ,  C21B11/00 ,  C21B13/00 ,  C21C5/56 ,  C21B ,  C22B

Abstract: A direct smelting process for producing metals from a metalliferous feed material is disclosed. The process includes forming a molten bath having a metal layer (15) and a slag layer (16) on the metal layer in a metallurgical vessel, injecting metalliferous feed material and solid carbonaceous material into the metal layer via a plurality of lances/tuyeres (11), and smelting metalliferous material to metal in the metal layer. The process also includes causing molten material to be projected as splashes, droplets, and streams into a top space above a nominal quiescent surface of the molten bath to form a transition zone (23). The process also includes injecting an oxygen-containing gas into the vessel via one or more than one lance/tuyere (13) to post-combust reaction gases released from the molten bath, whereby the ascending and thereafter descending splashes, droplets and streams of molten material in the transition zone facilitate heat transfer to the molten bath, and whereby the transition zone minimises heat loss from the vessel via the side walls in contact with the transition zone. The process is characterised by controlling the process by maintaining a high slag inventory.

公开(公告)号：ZA200603111B

公开(公告)日：2007-08-29

申请号：ZA200603111

申请日：2004-10-16

Applicant: OUTOKUMPU OY ,  TECH RESOURCES PTY LTD

Inventor： ANDREAS ORTH ,  JOHN LEIGH DAVID ,  DAMIAN BURKE PETER

IPC: C21B20090101 ,  C21B5/02 ,  C21B13/00 ,  C21B13/14 ,  C21C20090101 ,  C21C5/56 ,  F27B3/18 ,  F27D13/00

Abstract: A direct smelting plant for producing molten metal from metalliferous feed material includes a pretreatment unit for pretreating metalliferous feed material and producing pretreated feed material, a direct smelting vessel for smelting pretreated metalliferous feed material to molten metal and a hot feed material transfer apparatus for transferring pretreated metalliferous feed material from the pretreatment unit to a solids delivery device of the direct smelting vessel. The transfer apparatus includes a hot feed material storage device, a hot feed material transfer line, device for unblocking the hot feed material transfer line and a pressurising device. The hot feed material transfer apparatus includes a device for returning pretreated metalliferous feed material to the pretreatment unit.

公开(公告)号：ZA200208389B

公开(公告)日：2004-07-02

申请号：ZA200208389

申请日：2002-10-17

Applicant: TECH RESOURCES PTY LTD

Inventor： JAMES DRY RODNEY ,  DAMIAN BURKE PETER

IPC: C22B5/00 ,  C21B11/00 ,  C21B11/02 ,  C21B13/00 ,  C21B

Abstract: A molten-bath based direct smelting process and apparatus for producing metals from a ferrous material is disclosed. The process includes injecting feed materials being solid material and carrier gas into a molten bath at a velocity of at least 40 m/s through at least one downwardly extending solids injection lance having a delivery tube of internal diameter of 40-200 mm that is located so that a central axis of an outlet end of the lance is at an angle of 20 to 90 degrees to a horizontal axis. The feed materials injection generates a superficial gas flow of at least 0.04 Nm 3 /s/m 2 within the molten bath at least in part by reactions of injected material in the bath. The gas now causes molten material to be projected upwardly as splashes, droplets and streams and form an expanded molten bath zone, with the gas flow and the upwardly projected molten material causing substantial movement of material within the molten bath and strong mixing of the molten bath. The feed materials are selected so that, in an overall sense, the reactions of the feed materials in the molten bath are endothermic. The process also includes injecting an oxygen-containing gas into an upper region of the vessel via at least one oxygen gas injection lance and post-combusting combustible gases released from the molten bath.