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    DUPLEX PROCEDURE FOR THE PRODUCTION OF METALS AND METAL ALLOYS FROM OXIDIC METAL ORES
    12.
    发明公开
    DUPLEX PROCEDURE FOR THE PRODUCTION OF METALS AND METAL ALLOYS FROM OXIDIC METAL ORES 失效
    双重工艺用于生产金属和金属合金FROM氧化金属矿

    公开(公告)号：EP0862657A4

    公开(公告)日：1999-06-02

    申请号：EP96934219

    申请日：1996-11-04

    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

    CPC classification number: F27B19/04 ,  C21B13/143 ,  C21B2100/60 ,  C21B2100/64 ,  Y02P10/136

    Abstract: The production of highly metallised 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. Plant for the process may consist of a shaft furnace or fluidised bed for the prereduction sequence, preferably the latter. For the triplex process, two associated fluidised beds (3, 5) are preferred. Any suitable furnace (7) may be used for smelting, as long as it is equipped for the injection of partially reduced ore, char and fluxes, hot air lancing, off gas and the tapping of molten metal and slag. The final stage of solid state reduction takes place at a temperature of at least 550 DEG C, preferably 750-900 DEG C. At least 50 % of metallisation is essential for satisfactory processing, preferably at least 80 %.

    A DIRECT SMELTING PROCESS
    16.
    发明公开
    A DIRECT SMELTING PROCESS 有权
    DIREKT-SCHMELZOFEN

    公开(公告)号：EP1230403A4

    公开(公告)日：2004-06-23

    申请号：EP00949007

    申请日：2000-08-07

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES

    IPC: C21B13/10 ,  C21B11/00 ,  C21B11/02 ,  C21B13/00 ,  C21B13/14 ,  B21B11/00 ,  B21B13/00

    CPC classification number: C21B13/0026 ,  C21B13/14 ,  C21B2100/42 ,  C21B2100/62 ,  C21B2100/66 ,  Y02P10/136 ,  Y10S75/958

    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.

    Abstract translation: 公开了一种直接熔炼含金属原料的方法。 氧化铁在预还原容器中以固态被部分还原。 将部分还原的氧化铁在直接熔炼容器中熔炼成铁水，该熔炼容器含有铁和矿渣的熔融浴并且提供有固体碳质材料作为还原剂和能量的来源以及含氧气体用于后燃烧碳 在容器中产生一氧化碳和氢气。 直接熔炼步骤产生含有硫的废气，废气从直接熔炼容器释放。 仅在预还原步骤中使用从直接熔炼容器释放的废气的一部分来预还原预还原容器中的氧化铁。 在预还原步骤中仅使用部分废气以控制部分还原的氧化铁返回直接熔炼容器的硫的量。

    A DIRECT SMELTING PROCESS
    17.
    发明公开
    A DIRECT SMELTING PROCESS 有权
    DIREKTES SCHMELZVERFAHREN

    公开(公告)号：EP1098997A4

    公开(公告)日：2003-07-02

    申请号：EP99928910

    申请日：1999-07-01

    Applicant: TECH RESOURCES PTY LTD

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

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

    CPC classification number: C21C5/56 ,  C21B11/00 ,  C21B13/0006 ,  Y02P10/136

    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.

    Abstract translation: 公开了用于从含金属原料生产金属的直接熔炼工艺。 该方法包括在冶金容器中的金属层上形成具有金属层（15）和渣层（16）的熔池，通过多个喷枪/风口将金属原料和固体碳质材料注入金属层 11），并将含金属材料熔炼成金属层中的金属。 该方法还包括使熔融材料以飞溅，液滴和液流的形式投射到熔池的名义静止表面上方的顶部空间中以形成过渡区（23）。 该方法还包括通过一个或多于一个的喷枪/风口（13）将含氧气体注入容器中以后燃烧从熔池中释放的反应气体，由此上升和随后下降的飞溅，液滴和熔融流 过渡区中的材料促进热传递到熔池，并且由此过渡区通过与过渡区接触的侧壁使来自容器的热损失最小化。 该过程的特点是通过维持高炉渣库存来控制过程。

    A METHOD AND AN APPARATUS FOR PRODUCING METALS AND METAL ALLOYS
    18.
    发明公开
    A METHOD AND AN APPARATUS FOR PRODUCING METALS AND METAL ALLOYS 失效
    VERFAHREN UND VORRICHTUNG ZUR HERSTELLUNG VON METALLEN UND METALLLEGIERUNGEN

    公开(公告)号：EP0950117A4

    公开(公告)日：1999-12-29

    申请号：EP97939860

    申请日：1997-09-17

    Applicant: TECH RESOURCES PTY LTD

    Inventor： DRY RODNEY JAMES

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

    CPC classification number: C21B13/14 ,  C22B1/00 ,  C22B5/12 ,  C22B5/18 ,  Y02P10/136 ,  Y02P10/143

    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 characterised 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.

    Abstract translation: 公开了一种由金属氧化物生产金属和金属合金的方法。 该方法包括在一个或多个预还原阶段中将金属氧化物部分预还原至至少60％的预还原度的步骤。 此后，该方法包括完全还原金属氧化物并在熔炼还原阶段熔化金属。 该方法的进一步特征在于，利用天然气，重整天然气和部分重整的天然气中的一种或多种作为还原剂源来执行至少一个预还原阶段。

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