公开(公告)号：US5374297A

公开(公告)日：1994-12-20

申请号：US151007

申请日：1993-11-12

Applicant: Mark R. Schlichting

Inventor： Mark R. Schlichting

IPC: C21B13/00 ,  C21C5/36 ,  C21C5/46 ,  C21C5/56 ,  C21C7/00 ,  C22B15/00 ,  C21C5/32

CPC classification number: C21C5/567 ,  C21B13/0013 ,  C21C5/4606 ,  C21C2005/366 ,  C21C7/0025 ,  Y02P10/136

Abstract: A furnace 10 for smelting iron ore and/or refining molten iron 20 is equipped with an overhead pneumatic lance 40, through which a center stream of particulate coal 53 is ejected at high velocity into a slag layer 30. An annular stream of nitrogen or argon 51 enshrouds the coal stream. Oxygen 52 is simultaneously ejected in an annular stream encircling the inert gas stream 51. The interposition of the inert gas stream between the coal and oxygen streams prevents the volatile matter in the coal from combusting before it reaches the slag layer. Heat of combustion is thus more efficiently delivered to the slag, where it is needed to sustain the desired reactions occurring there. A second stream of lower velocity oxygen can be delivered through an outermost annulus 84 to react with carbon monoxide gas rising from slag layer 30, thereby adding still more heat to the furnace.

Abstract translation: 用于熔炼铁矿石和/或精炼铁水20的炉10装备有高架气动喷枪40，通过该高架气动喷枪将颗粒煤53的中心流以高速喷射到炉渣层30中。氮或氩的环形流 51包围煤流。 氧气52同时以围绕惰性气体流51的环形流喷射。在煤和氧气流之间插入惰性气体流防止煤中的挥发性物质在其到达炉渣层之前燃烧。 因此，燃烧热更有效地传递到炉渣，在那里需要维持所需的反应。 低速氧气的第二流可以通过最外面的环84输送以与从炉渣层30上升的一氧化碳气体反应，从而向炉内添加更多的热量。

公开(公告)号：US5366537A

公开(公告)日：1994-11-22

申请号：US722

申请日：1993-01-05

Applicant: Mark R. Schlichting

Inventor： Mark R. Schlichting

IPC: C21B13/00 ,  C21C5/36 ,  C21C5/46 ,  C21C5/56 ,  C21C7/00 ,  C22B15/00

CPC classification number: C21C5/567 ,  C21B13/0013 ,  C21C5/4606 ,  C21C2005/366 ,  C21C7/0025 ,  Y02P10/136

Abstract: A furnace 10 for smelting iron ore and/or refining molten iron 20 is equipped with an overhead pneumatic lance 40, through which a center stream of particulate coal 53 is ejected at high velocity into a slag layer 30. An annular stream of nitrogen or argon 51 enshrouds the coal stream. Oxygen 52 is simultaneously ejected in an annular stream encircling the inert gas stream 51. The interposition of the inert gas stream between the coal and oxygen streams prevents the volatile matter in the coal from combusting before it reaches the slag layer. Heat of combustion is thus more efficiently delivered to the slag, where it is needed to sustain the desired reactions occurring there. A second stream of lower velocity oxygen can be delivered through an outermost annulus 84 to react with carbon monoxide gas rising from slag layer 30, thereby adding still more heat to the furnace.

Abstract translation: 用于熔炼铁矿石和/或精炼铁水20的炉10装备有高架气动喷枪40，通过该高架气动喷枪将颗粒煤53的中心流以高速喷射到炉渣层30中。氮或氩的环形流 51包围煤流。 氧气52同时以围绕惰性气体流51的环形流喷射。在煤和氧气流之间插入惰性气体流防止煤中的挥发性物质在其到达炉渣层之前燃烧。 因此，燃烧热更有效地传递到炉渣，在那里需要维持所需的反应。 低速氧气的第二流可以通过最外面的环84输送以与从炉渣层30上升的一氧化碳气体反应，从而向炉内添加更多的热量。

公开(公告)号：US4810286A

公开(公告)日：1989-03-07

申请号：US209863

申请日：1988-06-22

Applicant: Mark R. Schlichting ,  Marian Szatkowski

Inventor： Mark R. Schlichting ,  Marian Szatkowski

IPC: C21C7/10

CPC classification number: C21C7/10

Abstract: The carbon and dissolved oxygen contents of molten steel are reduced by a vacuum degassing treatment which may employ oxygen blowing. A determination is made of the idealized trajectory or path reflecting the change in carbon content and dissolved oxygen content, between atmospheric pressure and a preselected sub-atmospheric pressure at which the vacuum degassing treatment occurs. The idealized trajectory also reflects the effect of extraneous factors on the carbon content, dissolved oxygen content and temperature of the molten steel during the treatment. A selection is made of the boundaries of the idealized trajectory based upon the permissible limits of carbon content, dissolved oxygen content and temperature at the end of the vacuum degassing treatment. Adjustments are made at the beginning of the treatment and periodically throughout the treatment to maintain all three parameters, carbon content, dissolved oxygen content and temperature, within the boundaries of the idealized trajectory. The adjustments employ procedures extraneous to the vacuum degassing treatment.

Abstract translation: 通过可以使用吹氧的真空脱气处理来降低钢水的碳和溶解氧含量。 确定反映碳含量和溶解氧含量的变化的理想化轨迹或路径，在大气压和发生真空脱气处理的预选的次大气压之间。 理想化的轨迹还反映了处理过程中外来因素对钢水的碳含量，溶解氧含量和温度的影响。 根据允许的碳含量极限，溶解氧含量和真空脱气处理结束时的温度，选择理想化轨迹的边界。 在治疗开始时进行调整，并在整个治疗期间定期维持理想化轨迹边界内的所有三个参数，碳含量，溶解氧含量和温度。 调整采用与真空脱气处理无关的程序。