公开(公告)号：AT370252T

公开(公告)日：2007-09-15

申请号：AT01909336

申请日：2001-03-02

Applicant: TECH RESOURCES PTY LTD

Inventor： DRY RODNEY ,  BURKE PETER DAMIAN

IPC: C21B11/00 ,  C21B11/08 ,  C21B11/02 ,  C21B13/00 ,  C21B13/10

Abstract: A molten bath-based direct smelting process for producing ferrous metal from a ferrous feed material is disclosed. The process is characterised by injecting pro-heated air downwardly into metallurgical vessel at an angle of 20 to 90° C. relative to a horizontal axis and at a temperature of 800-1400 ° C. and at a velocity of 200-600 m/s via at least one lance ( 27 ) . This step forces molten material in the region of a lower end of the lance away from the lance and forming a "free"space around the lower end of the lance that has a concentration of molten material that is lower than the molten material concentration in the raised bath. The process is further characterised in that the lance is located so that: (i) the lance extends into the vessel a distance that is at least the outer diameter of he lover end of the lance; and (ii) the lower end of the lance is at least 3 times the outer diameter of the lower end of the lance above a quiescent surface of the molt bath.

公开(公告)号：AT378430T

公开(公告)日：2007-11-15

申请号：AT01951240

申请日：2001-07-19

Applicant: TECH RESOURCES PTY LTD

Inventor： DRY RODNEY

IPC: C21B11/08 ,  C21B13/00 ,  C21B13/10 ,  F27B3/18 ,  F27D3/18

Abstract: A direct smelting process for producing iron and/or ferroalloys is provided, which involves injecting feed materials into a molten bath of molten metal in a metallurgical vessel to form an expanded molten bath zone, and injecting oxygen containing gas, wherein the selection of the number of, and position of, the solids injection and oxygen gas injection lances is such that the expanded molten bath zone includes a raised region around the oxygen gas injection region, and such that splashes, droplets and streams of molten material project upwardly from the raised region, and such that a free space forms around a lower end of the oxygen gas injection lance.

公开(公告)号：AT434059T

公开(公告)日：2009-07-15

申请号：AT04726379

申请日：2004-04-08

Applicant: TECH RESOURCES PTY LTD

Inventor： IONS PHILIP ,  DRY RODNEY

IPC: C21B11/00 ,  C21B13/00 ,  C21C5/32 ,  C21C5/56 ,  C22B5/10 ,  C22B9/00 ,  F27B1/20 ,  F27B1/21 ,  F27B3/19 ,  F27B14/08 ,  F27D3/15 ,  F27D3/16 ,  F27D3/18

Abstract: A direct smelting plant for producing molten metal from a metalliferous feed material is disclosed. The plant includes a fixed smelting vessel to hold a molten bath of metal and slag and a gas space above the bath. The plant also includes means for supplying solids and gas feed materials to the vessel and for tapping molten material from the vessel. The plant also includes at least two platforms for supporting plant operators at different heights of the vessel. The metal tapping means and the slag tapping means are located so as to be accessible by plant operators on a cast house platform and the end metal tapping means and the end slag tapping means are located to be accessible by plant operators on an end tap platform that is at a lower height than the cast house platform.

公开(公告)号：AT363544T

公开(公告)日：2007-06-15

申请号：AT01921038

申请日：2001-04-11

Applicant: TECH RESOURCES PTY LTD

Inventor： DRY RODNEY ,  BURKE PETER

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

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.