公开(公告)号：US07588634B2

公开(公告)日：2009-09-15

申请号：US11533604

申请日：2006-09-20

申请人： Michael R. Lynn ,  W. David Song ,  Qingxia Liu ,  Qiang Yu ,  Michael L. Cloud

发明人： Michael R. Lynn ,  W. David Song ,  Qingxia Liu ,  Qiang Yu ,  Michael L. Cloud

IPC分类号： C04B11/00

CPC分类号： C01F11/466 ,  C04B11/002 ,  C04B11/024 ,  C04B11/032

摘要： A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to produce beta calcium sulfate hemihydrate. The process starts with 50-75% gypsum-containing solids slurry, and then steam calcines the slurry in a first reactor to form partially calcined gypsum slurry which contains calcium sulfate dihydrate and alpha calcium sulfate hemihydrate. The partially calcined slurry is then dewatered. Then the filter cake is fed into a kettle to complete the calcination process by converting the calcium sulfate dihydrate of the filter cake material into beta calcium sulfate hemihydrate.

摘要翻译： 公开了一种制备包括浆料煅烧步骤的α-和β-灰泥混合物以产生α硫酸钙半水合物，然后进行流化床煅烧步骤以产生β硫酸钙半水合物的方法。 该方法从50-75％含石膏固体浆料开始，然后蒸汽在第一反应器中煅烧浆料以形成含有硫酸钙二水合物和α硫酸钙半水合物的部分煅烧石膏浆料。 然后将部分煅烧的浆料脱水。 然后通过将滤饼材料的硫酸钙二水合物转化成β硫酸钙半水合物将滤饼进料到釜中以完成煅烧过程。

公开(公告)号：US5743728A

公开(公告)日：1998-04-28

申请号：US515265

申请日：1995-08-15

申请人： Michael L. Cloud ,  Kirk S. Moore

发明人： Michael L. Cloud ,  Kirk S. Moore

IPC分类号： C04B11/05 ,  C04B11/028 ,  F27B15/00 ,  F27B15/10 ,  F27B14/00

CPC分类号： F28D13/00 ,  C04B11/028 ,  F27B15/00 ,  F27B15/10 ,  F28D7/024

摘要： A method and system for calcining gypsum to recover gypsum in a form consisting essentially of calcium sulfate anhydrite is disclosed. The method includes the steps of feeding the ground gypsum material into a first kettle and heating the ground gypsum in the first kettle to the first predetermined temperature. The first predetermined temperature is preferably below 400.degree. F. so that the gypsum will still contain a sufficient amount of chemically-combined water so that it will self-fluidize by release of water vapor so that it will flow through the apparatus. The ground gypsum is then overflowed through at least one subsequent stage and heated to a final predetermined temperature to produce an anhydrite product. To produce insoluble calcium anhydrite or dead burn material, the final predetermined temperature is greater than 900.degree. F. and preferably within the range of about 900.degree. F.-1300.degree. F. In the subsequent stages, the gypsum powder is heated and simultaneously fluidized with a fluidizing media, preferably air, so that the ground gypsum will flow through the apparatus. In the preferred embodiment, the ground gypsum is fluidized by a plurality of mixing blades having air injection pipes along their breaking edges for injecting air into the gypsum and a plurality of air injection nozzles disposed radially about a periphery of the kettles. The fluidization of the ground gypsum in the subsequent stages ensures that it will flow through the apparatus for production of an anhydrite product.

摘要翻译： 公开了一种煅烧石膏以以基本上由硫酸钙无水石膏组成的形式回收石膏的方法和系统。 该方法包括将研磨的石膏材料进料到第一釜中并将第一釜中的磨碎石膏加热到第一预定温度的步骤。 第一预定温度优选低于400°F，使得石膏仍然将含有足够量的化学组合的水，使得其将通过释放水蒸气而自流化，使其流过设备。 然后将磨碎的石膏通过至少一个后续阶段溢出并加热至最终预定温度以产生无水石膏产品。 为了生产不溶性无水硬石膏或死火材料，最终预定温度大于900°F，优选在约900°F-1300°F范围内。在随后的阶段，将石膏粉末加热并同时流化 具有流化介质，优选空气，使得磨碎的石膏将流过设备。 在优选实施例中，磨碎的石膏通过多个具有沿其断裂边缘的空气喷射管的混合叶片流化，用于将空气喷入石膏中，并且多个空气注射喷嘴沿着水壶周边辐射放置。 在随后的阶段，磨碎的石膏的流化将确保其流过设备以生产无水石膏产品。

公开(公告)号：US5743954A

公开(公告)日：1998-04-28

申请号：US382612

申请日：1995-02-02

申请人： George E. Rowland ,  Michael L. Cloud ,  Daniel J. Milligan

发明人： George E. Rowland ,  Michael L. Cloud ,  Daniel J. Milligan

IPC分类号： B01J6/00 ,  B01J19/18 ,  C04B11/028 ,  F28D7/02 ,  C04B11/00

CPC分类号： F28D7/024 ,  B01J19/18 ,  B01J6/001 ,  C04B11/0281 ,  B01J2219/00063 ,  B01J2219/00083 ,  B01J2219/00155 ,  B01J2219/00157

摘要： A method and apparatus is disclosed for the continuous calcining of gypsum material in a high-efficiency, refractoryless kettle preferably heated by a multiple series of separate immersion tube burner coils, each coil operating within a specific calcining zone inside the kettle. The lowest, i.e., initial, burner tube coil is formed with a low profile to permit use of a small initial gypsum charge, and hence, a quick kettle start-up cycle. That low profile initial burner design also helps keep the agitator motor's load at a minimum during cycle start-up. Due to the immersion tube burner coil construction, no refractory structure for the kettle is required. Also, no separate hot pit structure is required, as the kettle is used to merely hold the material being calcined and no residual heat is present. A relatively thin kettle can be constructed, as it need only withstand relatively low operating temperatures. The kettle's staged, interiorly-disposed burner tube coils act to directly transfer burner tube heat to the kettle's contents, and the coils exhaust exteriorly of the kettle. The present calcining method and apparatus permits substantially improved tonnage output of calcined material, for a kettle of a given size. A modification to the present apparatus includes structure for recovering and recycling a portion of the spent burner gases, and also separate structure for forced aeration air, both preferably for introduction through the kettle bottom. One alternate embodiment concerns a differently-shaped kettle design. Another alternate embodiment concerns a modified kettle which uses a single immersion burner tube coil to provide the total heating of the kettle's contents, for use in certain calcining applications.

摘要翻译： 公开了一种方法和装置，其用于在高效率，无温度的釜中连续煅烧石膏材料，优选由多系列独立的浸入管燃烧器线圈加热，每个线圈在釜内的特定煅烧区域内操作。 最低的，即初始的燃烧器管线圈形成为低轮廓，以允许使用小的初始石膏装料，因此使用快速水壶启动循环。 这种低调的初始燃烧器设计还有助于在循环启动期间将搅拌器电机的负载保持在最小值。 由于浸入管燃烧器线圈结构，不需要锅的耐火结构。 另外，不需要单独的热坑结构，因为水壶仅用于保持正在煅烧的材料，并且不存在余热。 可以构造相对薄的水壶，因为它只需要承受较低的工作温度。 水壶的分级内部燃烧器管线圈用于将燃烧器管的热量直接传递到水壶的内容物，并且线圈在水壶的外部排出。 现有的煅烧方法和装置允许对于给定尺寸的釜，煅烧材料的吨位输出显着提高。 对本装置的改进包括用于回收和再循环一部分废燃烧器气体的结构，以及用于强制充气空气的分离结构，优选用于通过釜底引入。 一个替代实施例涉及不同形状的壶设计。 另一个替代实施例涉及一种改进的水壶，其使用单个浸入式燃烧器管线圈来提供釜的内容物的总体加热，用于某些煅烧应用。

公开(公告)号：US08343273B1

公开(公告)日：2013-01-01

申请号：US13435781

申请日：2012-03-30

申请人： Dennis M. Lettkeman ,  Raymond A. Kaligian, II ,  Michael L. Cloud ,  John W. Wilson

发明人： Dennis M. Lettkeman ,  Raymond A. Kaligian, II ,  Michael L. Cloud ,  John W. Wilson

IPC分类号： C04B11/00

CPC分类号： C04B11/007 ,  C04B11/024 ,  C04B20/1018 ,  C04B11/0283

摘要： A method for preparing a modified beta-stucco from calcined natural rock gypsum that includes preparing a solution of liquid diethylene-triamine-pentaacetic acid in water, applying the solution onto beta-stucco while hot from the calciner, forming a wetted beta-stucco, and allowing the wetted stucco to dry and heal, forming the modified beta-stucco.

摘要翻译： 一种从煅烧天然石膏制备改性β-灰泥的方法，其包括制备液体二亚乙基 - 三胺五乙酸在水中的溶液，将该溶液在煅烧炉热的同时将该溶液施加到β-灰泥上，形成润湿的β-灰泥， 并且允许湿润的灰泥干燥和愈合，形成改性的β-灰泥。

公开(公告)号：US5954497A

公开(公告)日：1999-09-21

申请号：US5323

申请日：1998-01-09

申请人： Michael L. Cloud ,  Kirk S. Moore

发明人： Michael L. Cloud ,  Kirk S. Moore

IPC分类号： C04B11/05 ,  C04B11/028 ,  F27B15/00 ,  F27B15/10 ,  F27B14/08

CPC分类号： F28D13/00 ,  C04B11/028 ,  F27B15/00 ,  F27B15/10 ,  F28D7/024

摘要： A method and system for calcining gypsum to recover gypsum in a form consisting essentially of calcium sulfate anhydrite is disclosed. The method includes the steps of feeding the ground gypsum material into a first kettle and heating the ground gypsum in the first kettle to the first predetermined temperature. The first predetermined temperature is preferably below 400.degree. F. so that the gypsum will still contain a sufficient amount of chemically-combined water so that it will self-fluidize by release of water vapor so that it will flow through the apparatus. The ground gypsum is then overflowed through at least one subsequent stage and heated to a final predetermined temperature to produce an anhydrite product. To produce insoluble calcium anhydrite or dead burn material, the final predetermined temperature is greater than 900.degree. F. and preferably within the range of about 900.degree. F.-1300.degree. F. In the subsequent stages, the gypsum powder is heated and simultaneously fluidized with a fluidizing media, preferably air, so that the ground gypsum will flow through the apparatus. In the preferred embodiment, the ground gypsum is fluidized by a plurality of mixing blades having air injection pipes along their breaking edges for injecting air into the gypsum and a plurality of air injection nozzles disposed radially about a periphery of the kettles. The fluidization of the ground gypsum in the subsequent stages ensures that it will flow through the apparatus for production of an anhydrite product.

摘要翻译： 公开了一种煅烧石膏以以基本上由硫酸钙无水石膏组成的形式回收石膏的方法和系统。 该方法包括将研磨的石膏材料进料到第一釜中并将第一釜中的磨碎石膏加热到第一预定温度的步骤。 第一预定温度优选低于400°F，使得石膏仍然将含有足够量的化学组合的水，使得其将通过释放水蒸气而自流化，使其流过设备。 然后将磨碎的石膏通过至少一个后续阶段溢出并加热至最终预定温度以产生无水石膏产品。 为了生产不溶性无水硬石膏或死火材料，最终预定温度大于900°F，优选在约900°F-1300°F范围内。在随后的阶段，将石膏粉末加热并同时流化 具有流化介质，优选空气，使得磨碎的石膏将流过设备。 在优选实施例中，磨碎的石膏通过多个具有沿其断裂边缘的空气喷射管的混合叶片流化，用于将空气喷入石膏中，并且多个空气注射喷嘴沿着水壶周边辐射放置。 在随后的阶段，磨碎的石膏的流化将确保其流过设备以生产无水石膏产品。

公开(公告)号：US5927968A

公开(公告)日：1999-07-27

申请号：US997205

申请日：1997-12-23

申请人： George E. Rowland ,  Michael L. Cloud ,  Daniel J. Milligan

发明人： George E. Rowland ,  Michael L. Cloud ,  Daniel J. Milligan

IPC分类号： B01J6/00 ,  B01J19/18 ,  C04B11/028 ,  F28D7/02 ,  F27B5/14

CPC分类号： F28D7/024 ,  B01J19/18 ,  B01J6/001 ,  C04B11/0281 ,  B01J2219/00063 ,  B01J2219/00083 ,  B01J2219/00155 ,  B01J2219/00157

摘要： A method and apparatus is disclosed for the continuous calcining of gypsum material in a high-efficiency, refractoryless kettle preferably heated by a multiple series of separate immersion tube burner coils, each coil operating within a specific calcining zone inside the kettle. The lowest, i.e., initial, burner tube coil is formed with a low profile to permit use of a small initial gypsum charge, and hence, a quick kettle start-up cycle. That low profile initial burner design also helps keep the agitator motor's load at a minimum during cycle start-up. Due to the immersion tube burner coil construction, no refractory structure for the kettle is required. Also, no separate hot pit structure is required, as the kettle is used to merely hold the material being calcined and no residual heat is present. A relatively thin kettle can be constructed, as it need only withstand relatively low operating temperatures. The kettle's staged, interiorly-disposed burner tube coils act to directly transfer burner tube heat to the kettle's contents, and the coils exhaust exteriorly of the kettle. The present calcining method and apparatus permits substantially improved tonnage output of calcined material, for a kettle of a given size. A modification to the present apparatus includes structure for recovering and recycling a portion of the spent burner gases, and also separate structure for forced aeration air, both preferably for introduction through the kettle bottom.One alternate embodiment concerns a differently-shaped kettle design. Another alternate embodiment concerns a modified kettle which uses a single immersion burner tube coil to provide the total heating of the kettle's contents, for use in certain calcining applications.

摘要翻译： 公开了一种方法和装置，其用于在高效率，无温度的釜中连续煅烧石膏材料，优选由多系列独立的浸入管燃烧器线圈加热，每个线圈在釜内的特定煅烧区域内操作。 最低的，即初始的燃烧器管线圈形成为低轮廓，以允许使用小的初始石膏装料，因此使用快速水壶启动循环。 这种低调的初始燃烧器设计还有助于在循环启动期间将搅拌器电机的负载保持在最小值。 由于浸入管燃烧器线圈结构，不需要锅的耐火结构。 另外，不需要单独的热坑结构，因为水壶仅用于保持正在煅烧的材料，并且不存在余热。 可以构造相对薄的水壶，因为它只需要承受较低的工作温度。 水壶的分级内部燃烧器管线圈用于将燃烧器管的热量直接传递到水壶的内容物，并且线圈在水壶的外部排出。 现有的煅烧方法和装置允许对于给定尺寸的釜，煅烧材料的吨位输出显着提高。 对本装置的改进包括用于回收和再循环一部分废燃烧器气体的结构，以及用于强制充气空气的分离结构，优选用于通过釜底引入。 一个替代实施例涉及不同形状的壶设计。 另一个替代实施例涉及一种改进的水壶，其使用单个浸入式燃烧器管线圈来提供釜的内容物的总体加热，用于某些煅烧应用。