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公开(公告)号：DE69927273T2
公开(公告)日：2006-01-12
申请号：DE69927273
申请日：1999-07-01
Applicant: TECH RESOURCES PTY LTD
Inventor： MCCARTHY CAROLYN , DRY JAMES , BURKE DAMIAN
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.
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公开(公告)号：DE69927273D1
公开(公告)日：2005-10-20
申请号：DE69927273
申请日：1999-07-01
Applicant: TECH RESOURCES PTY LTD
Inventor： MCCARTHY CAROLYN , DRY JAMES , BURKE DAMIAN
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.
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公开(公告)号：DE69830924D1
公开(公告)日：2005-08-25
申请号：DE69830924
申请日：1998-09-23
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
Abstract: A molten bath-based direct smelting process for producing metals from metal oxides (including partially reduced metal oxides) is disclosed. The process includes causing upward movement of splashes, droplets, and streams of molten material from a metal layer (15) of the molten bath which: (i) promotes strong mixing of metal in a slag layer (16) of the molten bath so that the slag layer (16) is maintained in a strongly reducing condition leading to FeO levels below 8 wt % based on the total weight of the slag in the slag layer (16); and (ii) extends into a space above a nominal quiescent surface of the molten bath to form a transition zone (23).
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公开(公告)号：DE69717310T2
公开(公告)日：2003-09-04
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：DE69830924T2
公开(公告)日：2006-04-06
申请号：DE69830924
申请日：1998-09-23
Applicant: TECH RESOURCES PTY LTD
Inventor： DRY JAMES
Abstract: A molten bath-based direct smelting process for producing metals from metal oxides (including partially reduced metal oxides) is disclosed. The process includes causing upward movement of splashes, droplets, and streams of molten material from a metal layer (15) of the molten bath which: (i) promotes strong mixing of metal in a slag layer (16) of the molten bath so that the slag layer (16) is maintained in a strongly reducing condition leading to FeO levels below 8 wt % based on the total weight of the slag in the slag layer (16); and (ii) extends into a space above a nominal quiescent surface of the molten bath to form a transition zone (23).
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Patent Agency Ranking
公开(公告)号：DE69914777T2
公开(公告)日：2004-08-05
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：DE69914612T2
公开(公告)日：2004-06-24
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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公开(公告)号：DE69914613D1
公开(公告)日：2004-03-11
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：DE69625187T2
公开(公告)日：2003-05-08
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：DE69621147D1
公开(公告)日：2002-06-13
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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