公开(公告)号：US4375883A

公开(公告)日：1983-03-08

申请号：US318966

申请日：1981-11-06

申请人： Vitie P. Keran ,  Alan C. Baker

发明人： Vitie P. Keran ,  Alan C. Baker

IPC分类号： C21B13/08

CPC分类号： C21B13/08 ,  Y02P10/216

摘要： A method and means for improving the efficiency of the process for directly reducing ore containing iron oxide in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the ore feed and discharge ends of the kiln, as both fuel and reductant, is disclosed wherein the charred coal or char found in the discharge product is recycled into the process at the discharge end of the kiln rather than the feed end as in the prior art. In particular, the recovered char, both coarse and finer particles, are transported to a recycle bin from which they are returned at a preselected rate to the kiln process by being injected along with the coal blown into the discharge end of the kiln. Alternatively, the recycle char alone may be fed without any coal at the discharge end of the kiln.

公开(公告)号：US4330325A

公开(公告)日：1982-05-18

申请号：US224151

申请日：1981-01-12

申请人： Vitie P. Keran ,  Alan C. Baker

发明人： Vitie P. Keran ,  Alan C. Baker

IPC分类号： C21B13/08 ,  F27B7/36

CPC分类号： F27B7/362 ,  C21B13/08 ,  F27B2007/365 ,  F27B2007/367 ,  F27M2001/02

摘要： In the direct reduction process for reducing iron ore to sponge iron of the type disclosed in U.S. Pat. No. 3,890,138 to Hockin wherein all of the air supply tubes along the rotary kiln inject air toward the discharge end of the kiln it has been found that by reversing the direction of injection of the air from one or more of the tubes in the preheat zone of the kiln the condition of the off-gases can be considerably improved without affecting the process in the reduction zone and ultimately the quality of the resulting product and improved preheating of the kiln charge can be effected without the formation of undesirable kiln accretions.

摘要翻译： 在将铁矿石还原成海绵铁的直接还原方法中， Hockin的3,890,138号，其中沿着回转窑的所有空气供应管将空气朝向窑的排放端注入，已经发现通过反转来自预热区中的一个或多个管的空气的注入方向 的窑炉，可以显着地改善废气的状态，而不影响还原区域中的过程，并且最终可以实现所得产物的质量并且可以实现窑炉装料的预热，而不会形成不期望的窑炉。

公开(公告)号：US4378243A

公开(公告)日：1983-03-29

申请号：US266602

申请日：1981-05-22

申请人： Harry W. Hockin, deceased ,  Brian F. Bracanin ,  Ronald J. Clements ,  Vitie P. Keran ,  Alan C. Baker ,  Thomas W. Goodell

发明人： Harry W. Hockin, deceased ,  Brian F. Bracanin ,  Ronald J. Clements ,  Vitie P. Keran ,  Alan C. Baker ,  Thomas W. Goodell

IPC分类号： C21B11/06 ,  C21B13/08

CPC分类号： C21B13/08 ,  Y02P10/216

摘要： A method and means for improved control of the process for directly reducing materials containing iron oxides in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the charge feed and discharge ends of the kiln, as the source of both fuel and reductant, and oxygen-containing gas introduced along the kiln length is disclosed wherein the portion of the reducing agent fed at the discharge end is blown as a stream in a prescribed manner into the discharge end of the kiln. In particular, the important features of the stream are described including its longitudinal distribution and axial spread over the charge bed, as well as its contact region with the kiln walls and the quandrants of the kiln barrel into which it is directed, whereby the bed and gas phase temperatures may be controlled and heat transfer to the bed enhanced.

摘要翻译： 一种用于直接还原含有铁氧化物的材料的方法和方法，该方法和方法是使用从电荷进料和窑排出端引入的固体碳质还原剂（例如煤）作为两种燃料源 还原剂和沿窑长引入的含氧气体，其中在排出端供给的还原剂部分以规定的方式被吹送到窑的排放端。 特别地，描述了流的重要特征，其包括其在电荷床上的纵向分布和轴向扩展，以及其与窑壁和窑筒的待排入的囤积物的接触区域，由此床和 可以控制气相温度并增强对床的热传递。

公开(公告)号：US4356031A

公开(公告)日：1982-10-26

申请号：US244154

申请日：1981-03-16

申请人： Harry W. Hockin, deceased ,  Brian F. Bracanin ,  Ronald J. Clements ,  Vitie P. Keran ,  Alan C. Baker

发明人： Harry W. Hockin, deceased ,  Brian F. Bracanin ,  Ronald J. Clements ,  Vitie P. Keran ,  Alan C. Baker

IPC分类号： C21B13/08

CPC分类号： C21B13/08 ,  Y02P10/216

摘要： A method and means for maintaining optimum operation of the process for directly reducing iron oxides in a rotary kiln, using a solid carbonaceous reducing agent, such as coal fed at both the charge feed end and discharge end as the source of fuel and reductant, and oxygen-containing gases is disclosed wherein the DRI product, charred coal or char, and fine waste found in the kiln discharge materials from the discharge end are separated and measured for fixed carbon content and the process parameters may be adjusted to optimum by establishing an appropriate percentage by weight, in the range from 5% to 15%, of fixed carbon in the total of these discharge materials. This optimum condition may be monitored by establishing a particular level of char in the char recycle bin once the appropriate percentage by weight of fixed carbon is established in these discharge materials and optimum operation is maintained by maintaining the particular level of the char in the recycle bin and appropriately adjusting the coal feed and related parameters of the process if the char level rises or drops within the bin.

摘要翻译： 使用固体碳质还原剂（例如在电荷进料端和排出端两端供应的煤作为燃料源和还原剂）直接还原回转窑中的铁氧化物的方法和方法，以及 公开了含氧气体，其中分离并测量在窑炉中发现的DRI产物，烧焦煤或焦炭以及从排出端排出的精细废物以测量固定碳含量，并且可以通过建立适当的方法将工艺参数调整到最佳 在这些放电材料的总量中，固体碳的重量百分比在5％至15％的范围内。 通过在这些放电材料中确定适当的重量百分比的固定碳，可以通过在炭回收箱中确定特定水平的炭来监测该最佳条件，并且通过将炭的特定水平保持在回收箱中来保持最佳操作 并适当地调整煤炭进料量和加工过程中的相关参数，如果炭含量在罐内上升或下降。

公开(公告)号：US4273314A

公开(公告)日：1981-06-16

申请号：US51017

申请日：1979-06-22

申请人： Vitie P. Keran ,  Alan C. Baker

发明人： Vitie P. Keran ,  Alan C. Baker

IPC分类号： C21B13/08 ,  F27B7/36

CPC分类号： C21B13/08 ,  F27B7/362 ,  F27B2007/365 ,  F27B2007/367 ,  F27M2001/02

摘要： In the direct reduction process for reducing iron ore to sponge iron of the type disclosed in U.S. Pat. No. 3,890,138 to Hockin wherein all of the air supply tubes along the rotary kiln inject air toward the discharge end of the kiln it has been found that by reversing the direction of injection of the air from one or more of the tubes in the preheat zone of the kiln the condition of the off-gases can be considerably improved without affecting the process in the reduction zone and ultimately the quality of the resulting product and improved preheating of the kiln charge can be effected without the formation of undesirable kiln accretions.

摘要翻译： 在将铁矿石还原成海绵铁的直接还原方法中， Hockin的3,890,138号，其中沿着回转窑的所有空气供应管将空气朝向窑的排放端注入，已经发现通过反转来自预热区中的一个或多个管的空气的注入方向 的窑炉，可以显着地改善废气的状态，而不影响还原区域中的过程，并且最终可以实现所得产物的质量并且可以实现窑炉装料的预热，而不会形成不期望的窑炉。

公开(公告)号：US4378241A

公开(公告)日：1983-03-29

申请号：US203275

申请日：1980-11-03

申请人： Alan C. Baker ,  Vitie P. Keran ,  Geoffrey N. Boulter

发明人： Alan C. Baker ,  Vitie P. Keran ,  Geoffrey N. Boulter

IPC分类号： C21B13/08

CPC分类号： C21B13/08 ,  Y02P10/216

摘要： A method for maintaining the sulfur level below 0.05% by weight, and preferably below 0.02% by weight, in the DRI product from the process for directly reducing ore containing iron oxides in a rotary kiln using a solid carbonaceous reducing agent, fed at the materials feed end and at the discharge end of the kiln, as both fuel and reductant is disclosed, identifying the important factors in the process affecting the sulfur levels in the DRI and steps and means for properly controlling these factors.

摘要翻译： 在使用固体碳质还原剂的直接还原含铁氧化物的矿石的方法的DRI产物中，将硫含量维持在0.05重量％以下，优选低于0.02重量％的方法， 进料端和在窑的排放端，公开了燃料和还原剂，鉴定了影响DRI中硫含量的过程中的重要因素，以及适当控制这些因素的步骤和手段。

公开(公告)号：US4337084A

公开(公告)日：1982-06-29

申请号：US132806

申请日：1980-03-24

申请人： Vitie P. Keran ,  Alan C. Baker

发明人： Vitie P. Keran ,  Alan C. Baker

IPC分类号： C21B13/08

CPC分类号： C21B13/08 ,  Y02P10/216

摘要： A method and means for improving the efficiency of the process for directly reducing ore containing iron oxide in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the ore feed and discharge ends of the kiln, as both fuel and reductant, is disclosed wherein the charred coal or char found in the discharge product is recycled into the process at the discharge end of the kiln rather than the feed end as in the prior art. In particular, the recovered char, both coarse and finer particles, are transported to a recycle bin from which they are returned at a preselected rate to the kiln process by being injected along with the coal blown into the discharge end of the kiln. Alternatively, the recycle char alone may be fed without any coal at the discharge end of the kiln.

摘要翻译： 一种用于提高直接还原含铁氧化物的方法和方法的方法和方法，其使用从矿石进料和窑的排出端引入的固体碳质还原剂如煤，作为燃料和还原剂 ，其中在排放产物中发现的烧焦煤或焦炭在现有技术中在窑的排放端而不是进料端循环进入该过程。 特别地，回收的炭，粗颗粒和更细的颗粒被运送到回收箱，通过与吹入窑的排出端的煤一起注入，回收箱以预选的速率返回到窑工艺。 或者，单独的再循环炭可以在窑排放端没有任何煤进料。

公开(公告)号：US4304597A

公开(公告)日：1981-12-08

申请号：US132309

申请日：1980-03-20

申请人： Vitie P. Keran ,  Alan C. Baker

发明人： Vitie P. Keran ,  Alan C. Baker

IPC分类号： C21B13/08

CPC分类号： C21B13/08 ,  Y02P10/216

摘要： A method and means for improving control of the process for directly reducing ores containing iron oxide in a rotary kiln using a solid carbonaceous reducing agent, such as coal, introduced from the ore feed and discharge ends of the kiln, as both fuel and reductant, is disclosed wherein the temperature profile of the moving bed of solids is maintained such that the temperature is moderated to remain below the sintering temperature of the materials in the bed from the feed end zone for about the first two-thirds of the kiln length and the temperature is then maximized within sintering limitations in the working zone which is limited to about the last third of the kiln length. The temperature profile is controlled by regulating the volumes of air supplied to the kiln atmosphere from air injectors at spaced intervals along the length of the kiln, after establishing the appropriate proportion of coal steadily blown into the discharge end of the kiln for the particular process constituents being used.

摘要翻译： 一种用于直接还原含有氧化铁的矿石的方法和方法，该方法和方法使用从矿石进料和窑的排出端引入的固体碳质还原剂如煤，作为燃料和还原剂， 公开了其中固体移动床的温度分布保持使得温度被调节以保持低于来自进料端区的床中的材料的烧结温度约为炉膛长度的第一三分之二和 然后在工作区的烧结限制范围内将温度最大化，限制在窑长度的最后三分之一。 温度曲线是通过调整从空气喷射器供应到空气喷射器的空气的体积，沿着窑的长度间隔开的时间，在确定适当比例的煤稳定地吹入窑的排出端之后，为特定的工艺成分 正在使用。