利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.01 秒)

    DIRECT BATH SMELTING PROCESS WITH FAST QUENCH OF MOLTEN MATERIAL IN HOT OFFGAS
    1.
    发明公开
    DIRECT BATH SMELTING PROCESS WITH FAST QUENCH OF MOLTEN MATERIAL IN HOT OFFGAS 审中-公开

    公开(公告)号：US20240279757A1

    公开(公告)日：2024-08-22

    申请号：US18441101

    申请日：2024-02-14

    申请人： NUCOR CORPORATION

    发明人： Rodney James Dry ,  Mark Hayton

    IPC分类号： C21B13/00 ,  C21B13/10

    CPC分类号： C21B13/0013 ,  C21B13/105 ,  C21B2100/40 ,  C21B2400/024 ,  C21B2400/032 ,  C21B2400/062 ,  C21B2400/072

    摘要： An improved direct smelting system and process using a smelt reduction vessel (SRV), and optionally, a cyclone converter furnace (CCF). The improved system and process utilizes a fast quench system in which hot process offgas containing molten material is quench-cooled from greater than 1400° C. (2552° F.) to no more than 600° C. (1112° F.) in a time-of-flight of no greater than 1 second. The quenching occurs using water spray injection and vaporization to cool, stress and break solid slag into slag pieces small enough to remove from the quenching system. The improved system eliminates plant availability problems associated with (i) accretion formation in the offgas train as hot process offgas cools down in a conventional (slow) manner to allow for steam-raising for power generation or other heat recovery purposes, and (ii) trigger mechanisms causing slag foaming events in the SRV that propagate up the offgas train.

    PROCESS AND SYSTEM FOR THE PRODUCTION OF IRON NUGGETS
    2.
    发明公开
    PROCESS AND SYSTEM FOR THE PRODUCTION OF IRON NUGGETS 审中-公开

    公开(公告)号：US20240182993A1

    公开(公告)日：2024-06-06

    申请号：US17759805

    申请日：2022-03-23

    申请人： Carbontec Energy Corporation

    发明人： John Simmons ,  Dale Hintsala

    IPC分类号： C21B13/00 ,  C21B13/10 ,  C21C1/10

    CPC分类号： C21B13/0046 ,  C21B13/10 ,  C21C1/10 ,  C21B2400/032

    摘要： A hearth for a traveling hearth furnace for the production of pig iron grade nuggets, the hearth having a synthetic graphite material in direct contact with the process charge in producing a plurality of metallic iron nodules and slag. The process charge including iron containing oxide, a predetermined amount of a reductant and flux, which are carried into and through a reducing, melting and coalescing stages on the hearth, wherein resulting metallic iron nodules and slag are in direct contact with the synthetic graphite material and do not adhere to the synthetic graphite material of the hearth. The absence adherence and ease of removal minimizes any impurities in the pig iron grade nuggets and allows the hearth to be used more than one cycle without the need for any replenishment of the contact surface.