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18 条记录 (耗时 0.025 秒)

    Process for the production of iron carbide from iron oxide using external sources of carbon monoxide
    3.
    发明授权
    Process for the production of iron carbide from iron oxide using external sources of carbon monoxide 失效
    使用外来的一氧化碳从氧化铁生产碳化铁的方法

    公开(公告)号：US06428763B1

    公开(公告)日：2002-08-06

    申请号：US09532583

    申请日：2000-03-22

    申请人： Frank M. Stephens, Jr. ,  Frank A. Stephens ,  Robert F. Hogsett ,  John P. Hager

    发明人： Frank M. Stephens, Jr. ,  Frank A. Stephens ,  Robert F. Hogsett ,  John P. Hager

    IPC分类号： C01B3130

    CPC分类号： C01B32/914

    摘要： The present invention is a process for the rapid conversion of iron oxide-containing material into iron carbide. The process includes a first step in which the iron oxide-containing material is contacted with a reducing gas that contains a high concentration of hydrogen gas to form a metallic iron-containing intermediate product and a second step in which the metallic iron-containing product is contacted with a carburizing gas having high concentrations of hydrogen and carbon monoxide gas to produce iron carbide. The unused carbon monoxide in the off-gas from the second step is not recycled to the second step but is used as a fuel source.

    摘要翻译： 本发明是将含氧化铁的材料快速转化成碳化铁的方法。 该方法包括第一步骤，其中使含氧化铁的材料与含有高浓度氢气的还原气体接触以形成含金属铁的中间产物，第二步是将金属含铁产物 与具有高浓度氢气和一氧化碳气体的渗碳气体接触以产生碳化铁。 来自第二步骤的废气中的未使用的一氧化碳不被再循环到第二步，而是用作燃料源。

    Method for controlling the conversion of iron-containing reactor feed into iron carbide
    4.
    发明授权
    Method for controlling the conversion of iron-containing reactor feed into iron carbide 失效
    控制含铁反应堆进料转化为碳化铁的方法

    公开(公告)号：US5366897A

    公开(公告)日：1994-11-22

    申请号：US9859

    申请日：1993-01-27

    申请人： John P. Hager ,  Frank A. Stephens ,  Frank M. Stephens, Jr.

    发明人： John P. Hager ,  Frank A. Stephens ,  Frank M. Stephens, Jr.

    IPC分类号： B01J8/24 ,  C21B13/00 ,  G01N33/00 ,  C22B5/14 ,  C01B31/30

    CPC分类号： B01J8/1809 ,  C21B13/0033 ,  G01N33/0022 ,  G01N33/0032 ,  B01J2208/00044 ,  Y02P10/136 ,  Y10T436/12

    摘要： A process for controlling the conversion of reactor feed to iron carbide is disclosed. The reactor feed is subjected to a process gas in a fluidized bed reactor (10), and the off-gas from this reaction is analyzed (56) to determine its composition and the temperature (64) and pressure (66). A stability phase diagram is generated based on the temperature. Different regions of the stability phase diagram are representative of different products being formed by the conversion of the reactor feed. Based on relative concentrations of the individual gases in the off-gas and the total pressure, a point is plotted on the stability phase diagram indicative of the favored reaction product. The process parameters can then be adjusted to insure that iron carbide can be produced from the reactor feed based on the stability phase diagram. In one embodiment, the rate of conversion of the reactor feed into iron carbide is controlled.

    摘要翻译： 公开了一种控制反应器进料转化为碳化三铁的方法。 在流化床反应器（10）中对反应器进料进行处理气体，分析来自该反应的废气（56）以确定其组成和温度（64）和压力（66）。 基于温度生成稳定相图。 稳定相图的不同区域代表通过反应器进料的转化而形成的不同产物。 基于废气中各种气体的相对浓度和总压力，在指示有利反应产物的稳定相图上绘制一个点。 然后可以调整工艺参数，以确保基于稳定相图从反应器进料中产生碳化铁。 在一个实施方案中，控制反应器进料转化为碳化三铁的速率。

    Iron carbide process
    6.
    发明授权
    Iron carbide process 失效
    碳化铁工艺

    公开(公告)号：US5804156A

    公开(公告)日：1998-09-08

    申请号：US684408

    申请日：1996-07-19

    申请人： Gordon H. Geiger ,  Arden W. Swanson ,  Frank A. Stephens ,  Frank M. Stephens, Jr.

    发明人： Gordon H. Geiger ,  Arden W. Swanson ,  Frank A. Stephens ,  Frank M. Stephens, Jr.

    IPC分类号： C01B31/30 ,  C21B13/00

    CPC分类号： C01B31/303 ,  C21B13/0033 ,  Y02P10/136

    摘要： A process for producing iron carbide in a fluid bed reactor in which the pressure is maintained in excess of the pressure at which the mole fraction of hydrogen in the process gas begins to decrease. The hydrogen concentration may also be increased above the equilibrium concentration for hydrogen at the temperature and pressure in the reactor. Further improvements are gained by preheating a iron ore reactor feed in which the iron oxide is primarily in the form of hematite under a reducing atmosphere, and using at least two fluid bed reactors in series.

    摘要翻译： 在流化床反应器中生产碳化三铁的方法，其中压力保持在过程气体中氢的摩尔分数开始降低的压力以上。 在反应器的温度和压力下，氢浓度也可以增加到氢的平衡浓度以上。 通过在还原气氛下预热铁矿石反应器进料，其中氧化铁主要是赤铁矿的形式，并且使用至少两个流化床反应器串联来获得进一步的改进。

    Process for producing a ferronickel alloy from nickel bearing laterites
    8.
    发明授权
    Process for producing a ferronickel alloy from nickel bearing laterites 失效
    从镍轴承红土生产镍镍合金的方法

    公开(公告)号：US4398945A

    公开(公告)日：1983-08-16

    申请号：US276040

    申请日：1981-06-22

    申请人： Frank M. Stephens, Jr.

    发明人： Frank M. Stephens, Jr.

    IPC分类号： C21B13/00 ,  C22B23/02 ,  C22C33/00 ,  C21C5/52

    CPC分类号： C22C33/003 ,  C21B13/006 ,  C22B23/023 ,  Y02P10/136 ,  Y02P10/212

    摘要： The object of the invention is to provide a process for the recovery of iron and nickel from low iron content laterite ores.Said process comprises subjecting the ore to a carburizing step in the presence of a reducing agent and carbon supplying agent to convert the iron to iron carbide, followed by smelting the residue or product of the carburizing step to produce a ferronickel product.An alternative embodiment is the recovery of the iron and nickel from the product of the carburizing step by magnetic separation.

    摘要翻译： 本发明的目的是提供从低铁含量的红土矿石中回收铁和镍的方法。 所述方法包括在还原剂和碳供应剂存在下对矿石进行渗碳步骤以将铁转化成碳化铁，然后熔化渗碳步骤的残余物或产物以产生镍铁产品。 另一个实施例是通过磁分离从渗碳步骤的产物中回收铁和镍。

    Process for recovering iron and zinc from steel making dusts
    9.
    发明授权
    Process for recovering iron and zinc from steel making dusts 失效
    从炼钢粉尘中回收铁和锌的工艺

    公开(公告)号：US4396423A

    公开(公告)日：1983-08-02

    申请号：US275799

    申请日：1981-06-22

    申请人： Frank M. Stephens, Jr. ,  James C. Blair

    发明人： Frank M. Stephens, Jr. ,  James C. Blair

    IPC分类号： C22B19/02 ,  B03C1/015 ,  C01B31/30 ,  C21B13/00 ,  C21B15/00 ,  C22B7/02 ,  C22B19/30

    CPC分类号： C22B19/30 ,  B03C1/015 ,  C21B13/006 ,  C22B7/02 ,  Y02P10/212 ,  Y10S75/961

    摘要： The object of the invention is to provide a process for the recovery of iron and zinc from steel making flue dust.The process comprises subjecting the flue dust to a carbiding step in a fluid bed in the presence of a reducing agent and a carbon supplying agent to break down the zinc ferrite structure and convert the iron to iron carbide, followed by heating the residue or product of the carbiding step to recover zinc by evaporization.The iron carbide produced may be introduced into a steel making furnace for the production of steel.An alternative procedure is the recovery of iron carbide and zinc by magnetic separation from the gangue after the carbiding step and before separation of zinc from iron carbide.

    摘要翻译： 本发明的目的是提供一种从炼钢烟道灰中回收铁和锌的方法。 该方法包括在还原剂和碳供应剂存在下使烟道灰尘进入流化床中的碳化步骤，以分解锌铁氧体结构并将铁转化成碳化铁，然后加热残留物或产物 通过蒸发回收锌的碳化步骤。 所生产的碳化铁可以被引入用于生产钢的炼钢炉。 另一种方法是在碳化步骤之后和锌从碳化铁分离之前通过磁力分离从脉石回收碳化铁和锌。

    Two step process for the production of iron carbide from iron oxide
    10.
    发明授权
    Two step process for the production of iron carbide from iron oxide 失效
    从氧化铁生产碳化铁的两步法

    公开(公告)号：US5869018A

    公开(公告)日：1999-02-09

    申请号：US181997

    申请日：1994-01-14

    申请人： Frank M. Stephens, Jr.

    发明人： Frank M. Stephens, Jr.

    IPC分类号： C01B31/30 ,  C21B13/00

    CPC分类号： C01B31/303 ,  C21B13/0033 ,  C01P2006/80 ,  Y02P10/136 ,  Y02P10/143 ,  Y02P10/212

    摘要： The present in a process for the conversion of iron-containing material into iron carbide. The process includes a first step in which the iron-containing material is contacted with a reducing gas that contains no more than a small amount of reactive carbon to produce metallic iron and a second step in which the metallic iron is contacted with a reducing and carburizing gas to produce iron carbide.The reducing and carburizing gas includes reactive carbon, hydrogen, and methane. The iron carbide product is of high purity.

    摘要翻译： 目前在将含铁材料转化为碳化铁的工艺中。 该方法包括第一步骤，其中含铁材料与包含不超过少量活性炭的还原气体接触以产生金属铁，第二步是使金属铁与还原和渗碳接触 气体生产碳化铁。 还原和渗碳气体包括反应性碳，氢和甲烷。 碳化铁产品纯度高。