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    A direct smelting process
    71.
    发明专利
    A direct smelting process 未知

    公开(公告)号：NZ516879A

    公开(公告)日：2002-08-28

    申请号：NZ51687900

    申请日：2000-08-07

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES

    IPC: C21B11/00 ,  C21B11/02 ,  C21B13/00 ,  C21B13/14 ,  C21B13/10

    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.

    A DIRECT SMELTING PROCESS AND APPARATUS
    72.
    发明专利
    A DIRECT SMELTING PROCESS AND APPARATUS 未知

    公开(公告)号：CA2405966A1

    公开(公告)日：2001-11-01

    申请号：CA2405966

    申请日：2001-04-11

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES ,  BURKE PETER DAMIAN

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

    Abstract: A molten-bath based direct smelting process and apparatus for producing meta ls 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 40m/s through at least one downwardly extending solids injection lance having a delivery tube of internal diameter of 40-200mm that is located so that a central axis of an outlet end of the lance is at an ang le of 20 to 90 degrees to a horizontal axis. The feed materials injection generates a superficial gas flow of at least 0.04 Nm3/s/m2 within the molten bath at least in part by reactions of injected material in the bath. The gas flow causes molten material to be projected upwardly as splashes, droplets a nd 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 fe ed 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.

    73.
    发明专利
    未知

    公开(公告)号：ID28168A

    公开(公告)日：2001-05-10

    申请号：ID20010453

    申请日：1999-07-26

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES

    IPC: C21B13/14 ,  C21B13/00 ,  C21C5/56 ,  C22B1/04 ,  C22B1/10 ,  C22B1/00

    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.

    78.
    发明专利
    未知

    公开(公告)号：BR9711873A

    公开(公告)日：1999-08-24

    申请号：BR9711873

    申请日：1997-09-17

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES

    IPC: C21B13/14 ,  C22B1/00 ,  C22B5/12 ,  C22B5/18

    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.

    A method and an apparatus for producing metals and metal alloys
    79.
    发明专利
    A method and an apparatus for producing metals and metal alloys 未知

    公开(公告)号：ZA969203B

    公开(公告)日：1997-05-29

    申请号：ZA969203

    申请日：1996-11-01

    Applicant: TECH RESOURCES PTY LTD

    Inventor： INNES JOHN ALEXANDER ,  DRY RODNEY 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 ,  C22B

    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%.

    Biomass direct reduced iron
    80.
    发明专利
    Biomass direct reduced iron 未知

    公开(公告)号：AU2021348164A1

    公开(公告)日：2023-04-06

    申请号：AU2021348164

    申请日：2021-09-20

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES ,  FARR IAIN WILLIAM

    IPC: C21B13/10 ,  C21B13/00 ,  C21B13/14 ,  C22B1/24 ,  C22B5/10

    Abstract: A method for producing direct reduced iron ("DRI") from iron ore and biomass is disclosed. The method includes heating a batch of iron ore and biomass in each oven chamber of a non-recovery batch oven by a combination (i) the thermal mass of a lining of the oven chamber and (ii) combustion of a fuel gas from at least one other oven chamber and at least partially reducing the iron ore and forming DRI. The method also includes discharging gases from the oven chamber through passageways in a wall and a floor of the oven chamber and further combusting combustible gases and transferring heat to the wall and the floor of the oven chamber as the gases move through the passageways. The method also includes discharging at least a portion of gases from the oven chamber, without passing the gases through passageways in the floor of the oven chamber, and using these gases as a fuel gas in subsequent combustion heating in other batch oven chambers when a first predetermined trigger point is reached. A non-recovery batch oven is also disclosed.

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