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公开(公告)号：DE69621147T2
公开(公告)日：2002-09-26
申请号：DE69621147
申请日：1996-11-04
Applicant: TECH RESOURCES PTY LTD
Inventor： INNES ALEXANDER , DRY JAMES
IPC: C22B1/00 , C21B5/00 , C21B7/00 , C21B7/14 , C21B7/16 , C21B11/00 , C21B11/02 , C21B13/00 , C21B13/02 , C21B13/14 , C22B5/10 , C22B5/14 , C22B5/18 , F27B1/10 , F27B1/16 , F27B1/20 , F27B1/21 , F27B15/08 , F27B15/09 , F27B19/04
Abstract: The production of highly metallized feed, an intermediate product produced solely by gaseous reductants in two stage reduction processes of that kind, encounters sticking problems, which interfere with continuous processing and productivity. This problem has been overcome by exploiting a high volatile carbonaceous material, such as coal, as the reducing agent for the (partially reduced) oxide ore starting material in the solid state prereduction stage of a duplex process, in which the final stage consists of smelting, to produce the final metal (alloy). Intermediate products of the first stage are char from the coal, which avoids the sticking problem, partially reduced ore and CO and H2, which participate in the prereduction. The process has particular application to iron ores, such as haematite and magnetite and similar derivatives, namely, chromite and oxidic nickel ores. The process may be extended to a triplex, which includes drying, preheating and partial reduction in the first stage, followed by further partial reduction and finally the smelting step. The final stage of solid state reduction takes place at a temperature of at least 550° C., preferably 750-900° C. At least 50% of metallization is essential for satisfactory processing, preferably at least 80%.
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公开(公告)号：DE69925029D1
公开(公告)日：2005-06-02
申请号：DE69925029
申请日：1999-10-14
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
IPC: C21B11/08 , C21B13/00 , C21B13/14 , C21C5/56 , C22B5/18 , F27B3/18 , F27B3/22 , F27D9/00 , F27D13/00 , F27D17/00 , C21B11/00 , C21B11/02 , C22B5/10 , C22B5/12 , F27B19/02 , F27B19/04
Abstract: A process and an apparatus for producing metals from a metalliferous feed material are disclosed. The process includes the steps of partially reducing and at least partially melting a metalliferous feed material in a pre-reduction/melting means and completely reducing the partially reduced feed material in a reduction means. The pre-reduction/melting means is positioned directly above the reduction means and communicates with the reduction means so that at least partially molten, partially reduced feed material flows downwardly into a central region of the reduction means. The reduction means includes a vessel that contains a molten bath having a metal layer and a slag layer on the metal layer. The process includes injecting oxygen-containing gas into the reduction means and post-combusting reaction gas generated in the molten bath and injecting oxygen-containing gas into the pre-reduction/melting means and post-combusting reaction gas discharged from the reduction means. The process further includes injecting solid carbonaceous material and a carrier gas into a metal rich region of the molten bath and causing upward movement of splashes, droplets and streams of molten material which forms a transition zone.
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公开(公告)号：DE69914613T2
公开(公告)日：2004-06-24
申请号：DE69914613
申请日：1999-07-26
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
IPC: C21B9/00 , C21B11/08 , C21B13/00 , C21B13/14 , C21C5/56 , C22B5/10 , C22B1/04 , C22B1/10 , C22B1/00
Abstract: A process for direct smelting a metalliferous feed material is disclosed. The process includes the steps of partially reducing metalliferous feed material and substantially devolatilising coal in a pre-reduction vessel and producing a partially reduced metalliferous feed material and char. The process also includes direct smelting the partially reduced metalliferous feed material to molten metal in a direct smelting vessel using the char as a source of energy and as a reductant and post-combusting reaction gas produced in the direct smelting process with pre-heated air or oxygen-enriched air to a post-combustion level of greater than 70% to generate heat required for the direct smelting reactions and to maintain the metal in a molten state.
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公开(公告)号：DE69914777D1
公开(公告)日：2004-03-18
申请号：DE69914777
申请日：1999-07-26
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
Abstract: A process for direct smelting a metalliferous feed material is disclosed. Char and fuel gas are produced by pre-treating coal with an oxygen-containing gas. The fuel gas is used to heat an oxygen-containing gas and/or to produce an oxygen-containing gas in an oxygen plant. Metalliferous feed material, char, and the oxygen-containing gas are injected into a direct smelting vessel, and the metalliferous feed material is smelted to molten metal in the direct smelting vessel using the char as a source of energy and as a reductant.
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公开(公告)号：DE69914612D1
公开(公告)日：2004-03-11
申请号：DE69914612
申请日：1999-09-03
Applicant: TECH RESOURCES PTY LTD
Inventor： MCCARTHY ANNE , DRY JAMES , GOLDSWORTHY ELLEN
IPC: C21B11/00 , C21B13/00 , C21B13/02 , C21C5/28 , C21C5/46 , C21C5/56 , C21C7/00 , C22B5/10 , F27B3/04 , F27B3/08 , F27B3/19 , F27B3/22 , F27B19/02 , F27D3/00 , F27D3/18 , F27D9/00 , C21B11/02 , C22B5/12 , F27B19/04
Abstract: A direct smelting process for producing metal from a metalliferous feed material is disclosed. The direct smelting process is a molten bath-based process in which smelting occurs predominantly in the metal layer, carrier gas/metalliferous feed material/solid carbonaceous material are injected into the metal layer via lances/tuyeres, and oxygen-containing gas is injected into the top space above the molten bath and post-combusts reaction gases released from the bath. The injection of metalliferous feed material and solid carbonaceous material causes molten material to be projected from the molten bath as splashes, droplets and streams and to form a transition zone. The process is characterized by forming a pipe of a solid material on an outlet end of at least one lance/tuyere while injecting the metalliferous feed material and the carbonaceous material through the lances/tuyeres and thereby extending the effective length of the lance/tuyere or the lances/tuyeres.
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Patent Agency Ranking
公开(公告)号：DE60025728T2
公开(公告)日：2006-07-20
申请号：DE60025728
申请日：2000-08-07
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
Abstract: A process for direct smelting metalliferous feed material is disclosed. Iron oxides are partially reduced in a solid state in a pre-reduction vessel. The partially reduced iron oxides are smelted to molten iron in a direct smelting vessel which contains a molten bath of iron and slag and is supplied with a solid carbonaceous material as a source of reductant and energy and with an oxygen-containing gas for post-combusting carbon monoxide and hydrogen generated in the vessel. The direct smelting step generates an off-gas that contains sulphur and the off-gas is released from the direct smelting vessel. Part only of the off-gas released from the direct smelting vessel is used in the pre-reduction step to pre-reduce iron oxides in the pre-reduction vessel. Part only of the off-gas is used in the pre-reduction step in order to control the amount of sulphur that is returned with the partially reduced iron oxides to the direct smelting vessel.
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公开(公告)号：DE69925029T2
公开(公告)日：2006-03-02
申请号：DE69925029
申请日：1999-10-14
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
IPC: C21B11/08 , C21B11/00 , C21B11/02 , C21B13/00 , C21B13/14 , C21C5/56 , C22B5/10 , C22B5/12 , C22B5/18 , F27B3/18 , F27B3/22 , F27B19/02 , F27B19/04 , F27D9/00 , F27D13/00 , F27D17/00
Abstract: A process and an apparatus for producing metals from a metalliferous feed material are disclosed. The process includes the steps of partially reducing and at least partially melting a metalliferous feed material in a pre-reduction/melting means and completely reducing the partially reduced feed material in a reduction means. The pre-reduction/melting means is positioned directly above the reduction means and communicates with the reduction means so that at least partially molten, partially reduced feed material flows downwardly into a central region of the reduction means. The reduction means includes a vessel that contains a molten bath having a metal layer and a slag layer on the metal layer. The process includes injecting oxygen-containing gas into the reduction means and post-combusting reaction gas generated in the molten bath and injecting oxygen-containing gas into the pre-reduction/melting means and post-combusting reaction gas discharged from the reduction means. The process further includes injecting solid carbonaceous material and a carrier gas into a metal rich region of the molten bath and causing upward movement of splashes, droplets and streams of molten material which forms a transition zone.
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公开(公告)号：DE69625187D1
公开(公告)日：2003-01-16
申请号：DE69625187
申请日：1996-04-04
Applicant: TECH RESOURCES PTY LTD
Inventor： INNES ALEXANDER , BATTERHAM JOHN , DRY JAMES
Abstract: A method and an apparatus for producing metals and metal alloys from metal oxides in a metallurgical vessel containing a molten bath having a metal layer and a slag layer is disclosed. The method is characterized by injecting a carrier gas and a solid carbonaceous material and/or metal oxides into the molten bath from a side of the vessel that is in contact with the molten bath or from above the molten bath so that the solids penetrate the molten bath and cause molten metal to be projected into the gas space above the molten bath to form a transition zone. The method is also characterized by injecting an oxygen-containing gas into the gas space to post-combust reaction gases released from the molten bath into the transition zone.
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公开(公告)号：DE69717310D1
公开(公告)日：2003-01-02
申请号：DE69717310
申请日：1997-09-17
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
Abstract: A method of producing metals and metal alloys from metal oxides is disclosed. The method comprises the steps of partially pre-reducing the metal oxides to a pre-reduction degree of at least 60% in one or more pre-reduction stages. Thereafter, the method comprises completely reducing the metal oxides and melting the metal in a smelt reduction stage. The method is further characterized by carrying out at least one of the pre-reduction stages with one or more of natural gas, reformed natural gas, and partially reformed natural gas as a source of reductant.
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公开(公告)号：DE60025728D1
公开(公告)日：2006-04-13
申请号：DE60025728
申请日：2000-08-07
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
Abstract: A process for direct smelting metalliferous feed material is disclosed. Iron oxides are partially reduced in a solid state in a pre-reduction vessel. The partially reduced iron oxides are smelted to molten iron in a direct smelting vessel which contains a molten bath of iron and slag and is supplied with a solid carbonaceous material as a source of reductant and energy and with an oxygen-containing gas for post-combusting carbon monoxide and hydrogen generated in the vessel. The direct smelting step generates an off-gas that contains sulphur and the off-gas is released from the direct smelting vessel. Part only of the off-gas released from the direct smelting vessel is used in the pre-reduction step to pre-reduce iron oxides in the pre-reduction vessel. Part only of the off-gas is used in the pre-reduction step in order to control the amount of sulphur that is returned with the partially reduced iron oxides to the direct smelting vessel.
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