公开(公告)号：US4762684A

公开(公告)日：1988-08-09

申请号：US3046

申请日：1987-01-13

申请人： Eric Chantriaux ,  Henri Grobelny ,  Yves Perret

发明人： Eric Chantriaux ,  Henri Grobelny ,  Yves Perret

IPC分类号： C01F7/14 ,  B01F13/02

CPC分类号： C01F7/144 ,  C01F7/147 ,  C01P2004/50 ,  C01P2004/61

摘要： A method and apparatus for decomposing a sodium aluminate liquor supersaturated with alumina, obtained from alkaline action on bauxite by the Bayer process, is initiated by introduction of alumina trihydrate seed, thereby forming a suspension. The suspension is fed in at the top of a non-agitated reactor described as a "decomposer", and removed from the bottom of the decomposer; the speed at which the suspension moves downwardly is regulated at 1.5 to 10 meters per hour. The apparatus comprises a cylindrical-conical reactor which is fitted with an arrangement for feeding in the suspension at the top, and with an arrangement for taking out the suspension at the bottom. In one embodiment of the apparatus the suspension is taken from the base of the decomposer through an internal tube, with air injected into the bottom of it, is raised to the level of the top of the decomposer and is then sent downstream.

摘要翻译： 通过引入三水合氧化铝种子来引发用于通过拜耳法从碱性作用对铝土矿进行分解的用氧化铝过饱和的铝酸钠液体的方法和装置，从而形成悬浮液。 悬浮液在称为“分解器”的非搅拌反应器的顶部进料，并从分解器的底部除去; 悬架向下移动的速度调节为每小时1.5至10米。 该装置包括圆柱形锥形反应器，该反应器装配有用于供给悬挂在顶部的装置，并具有用于在底部取出悬架的装置。 在装置的一个实施例中，悬浮液通过内管从分解器的底部取出，其中注入空气的底部的空气被升高到分解器的顶部的水平面，然后被送到下游。

公开(公告)号：US4238159A

公开(公告)日：1980-12-09

申请号：US26061

申请日：1979-04-02

申请人： Arther J. Tielens ,  Wolfgang Muller ,  Erich K. Todtenhaupt

发明人： Arther J. Tielens ,  Wolfgang Muller ,  Erich K. Todtenhaupt

IPC分类号： C01F7/06 ,  B01F7/04 ,  C01F7/14 ,  B01F7/18

CPC分类号： C01F7/144 ,  C01F7/147

摘要： A supersaturated solution of ground bauxite and caustic soda is fed to a plurality of stirrer tanks in a product cascade. Each of these stirrer tanks of the product cascade has three vertically spaced zones with differing solid contents, a central vertical shaft and at least three vertically spaced paddles carried on the shaft and each extending into a respective one of the zones. The paddles are so constructed as to differently act on the solid in dependence upon the solid contents in each zone.

摘要翻译： 将磨碎的铝土矿和苛性钠的过饱和溶液在产物级联中进料到多个搅拌罐中。 产品级联的这些搅拌罐中的每一个具有三个具有不同固体含量的垂直间隔的区域，中心垂直轴和至少三个垂直间隔的叶片，其承载在轴上并且各自延伸到相应的一个区域中。 桨叶被构造成根据每个区域中的固体含量不同地作用在固体上。

公开(公告)号：US3741530A

公开(公告)日：1973-06-26

申请号：US3741530D

申请日：1971-10-26

申请人： UZINA DE ALUMINA ORADEA

发明人： STEFANOIU C

IPC分类号： B01F7/00 ,  B01F7/22 ,  B65G53/30 ,  C01F7/06 ,  C01F7/14 ,  B01F7/24 ,  B01F15/02

CPC分类号： C01F7/06 ,  B01F7/00591 ,  B01F7/22 ,  B65G53/30 ,  C01F7/147

摘要： Apparatus for stirring and transporting slurries in vessels of great volume used, for example, in the alumina industry. The apparatus of the invention is adapted to replace, with greater economic efficiency, the generally previously-used pneumatic system for the stirring and transportation of slurries. The present apparatus uses a tube centrally placed in the vessel; a turbine pump driven, for example, by an electric motor, is mounted in the tube. The turbine pump raises the slurry to the level of some apertures or windows in the tube. The thus-raised slurry overflows through the windows to fall partly into the same vessel and partly into a conduit for transportation out of such vessel. The conduit has windows through which the level of the slurry is maintained constant in the vessel. The device provides an intensive stirring and the transportation of the slurry independent of the volume of the vessel and independent of the density of the slurry, with a much lower power consumption as compared to pneumatic stirring. Such intensive stirring eliminates the encrustation on the bottom of the vessels and on the side walls of the receiver. The system of the invention also ensures the perfect vertical homogenization of the slurry, eliminating at the same time foaming and the eventual chemical reactions between the components of the slurry and those of air, and the consequent breaking down of the solid phase of the slurry.

摘要翻译： 用于在例如氧化铝工业中使用的容积大的容器中搅拌和输送浆料的设备。 本发明的装置适于以更经济的效率代替一般预先使用的用于搅拌和输送浆料的气动系统。 本装置使用集中放置在容器中的管; 例如由电动机驱动的涡轮泵安装在管中。 涡轮泵将浆料提升到管中的一些孔或窗口的水平面。 这样升高的浆料通过窗户溢出，部分地落入同一容器中，并部分地部分地进入用于运输出该容器的管道。 管道具有窗口，通过该窗口，浆料的水平在容器中保持恒定。 与气动搅拌相比，该装置提供了强烈的搅拌和浆料的输送，而不依赖于容器的体积并且与浆料的密度无关，具有低得多的功率消耗。 这种剧烈的搅拌消除了容器底部和接收器侧壁上的结垢。 本发明的系统还确保了浆料的完美垂直均匀化，同时消除了浆料与空气的组分之间的发泡和最终的化学反应，从而导致浆料固相的分解。

公开(公告)号：US09238184B2

公开(公告)日：2016-01-19

申请号：US13816096

申请日：2011-08-10

申请人： Guy Peloquin ,  Alain Larouche ,  Alain Boivin ,  Matthieu St-Laurent ,  Régis Girard ,  Guy Simard

发明人： Guy Peloquin ,  Alain Larouche ,  Alain Boivin ,  Matthieu St-Laurent ,  Régis Girard ,  Guy Simard

IPC分类号： B01D21/18 ,  B01D21/00 ,  B01D21/24 ,  C01F7/14

CPC分类号： B01D21/0042 ,  B01D21/183 ,  B01D21/2461 ,  C01F7/147 ,  C01F7/148

摘要： An apparatus for refining a process liquor that includes solids, which apparatus includes a vessel having a base and a side wall that define an internal volume for containing the process liquor and for allowing gravity settling of the solids in the liquor, whereby to produce a refined liquor toward a top of the internal volume and a slurry toward a bottom of the internal volume, the apparatus further includes solids displacement elements disposed within the internal volume for directing settled solids and/or settling solids in the vicinity of the side wall or of the base toward a flow path of the slurry being extracted from the slurry outlet. A processing plant including the above refining apparatus and a method for refining a process liquor.

摘要翻译： 一种用于精炼包括固体的处理液的装置，该装置包括具有底部和侧壁的容器，该容器限定用于容纳处理液体的内部容积并允许重力沉降液体中的固体，从而产生精制 液体朝向内部体积的顶部并且朝向内部体积的底部的浆料，该装置还包括设置在内部容积内的固体移动元件，用于引导沉降的固体和/或将固体沉积在侧壁附近或 基于从浆料出口提取的浆料的流动路径。 一种包括上述精炼装置的处理设备和一种精炼处理液的方法。

公开(公告)号：US20130206707A1

公开(公告)日：2013-08-15

申请号：US13816096

申请日：2011-08-10

申请人： Guy Peloquin ,  Alain Larouche ,  Alain Boivin ,  Matthieu St-Laurent ,  Régis Girard ,  Guy Simard

发明人： Guy Peloquin ,  Alain Larouche ,  Alain Boivin ,  Matthieu St-Laurent ,  Régis Girard ,  Guy Simard

IPC分类号： B01D21/00

CPC分类号： B01D21/0042 ,  B01D21/183 ,  B01D21/2461 ,  C01F7/147 ,  C01F7/148

摘要： An apparatus for refining a process liquor that includes solids, which apparatus includes a vessel having a base and a side wall that define an internal volume for containing the process liquor and for allowing gravity settling of the solids in the liquor, whereby to produce a refined liquor toward a top of the internal volume and a slurry toward a bottom of the internal volume, the apparatus further includes solids displacement elements disposed within the internal volume for directing settled solids and/or settling solids in the vicinity of the side wall or of the base toward a flow path of the slurry being extracted from the slurry outlet. A processing plant including the above refining apparatus and a method for refining a process liquor.

摘要翻译： 一种用于精炼包括固体的处理液的装置，该装置包括具有底部和侧壁的容器，该容器限定用于容纳处理液体的内部容积并允许重力沉降液体中的固体，从而产生精制 液体朝向内部体积的顶部并且朝向内部体积的底部的浆料，该装置还包括设置在内部容积内的固体移动元件，用于引导沉降的固体和/或将固体沉积在侧壁附近或 基于从浆料出口提取的浆料的流动路径。 一种包括上述精炼装置的处理设备和一种精炼处理液的方法。

公开(公告)号：US20070237709A1

公开(公告)日：2007-10-11

申请号：US11748396

申请日：2007-05-14

申请人： Hisakatsu Kato ,  Masashi Wada ,  Naoyuki Eguchi ,  Hirofumi Sasaki

发明人： Hisakatsu Kato ,  Masashi Wada ,  Naoyuki Eguchi ,  Hirofumi Sasaki

IPC分类号： C01F7/02

CPC分类号： B01F7/00208 ,  B01F7/00641 ,  B01F7/1675 ,  B01F7/22 ,  B01F15/00837 ,  B01F2215/0431 ,  B01F2215/044 ,  B01F2215/0472 ,  B01F2215/0477 ,  B01J19/006 ,  B01J19/0066 ,  B01J19/1812 ,  B01J2219/00768 ,  C01F7/02 ,  C01F7/14 ,  C01F7/144 ,  C01F7/147 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/60 ,  C09C1/407 ,  Y10T428/2982

摘要： Aluminum hydroxide aggregated particles which have an average particle diameter of not less than 40 μm, an average particle diameter as determined after processing at 1,000 kg/cm2 of not more than 35 μm, and an L value of slurry obtained by mixing 20 ml of glycerol and 10 g of the aluminum hydroxide aggregated particles of not more than 69, are obtained by a process comprising the steps of: (a) feeding a supersaturated aqueous sodium aluminate solution to a vessel, (b) adding aluminum hydroxide seeds to the supersaturated aqueous sodium aluminate solution, (c) stirring the seed-added solution in the vessel while continuously feeding an additional supersaturated aqueous sodium aluminate solution into the vessel to hydrolyze the supersaturated aqueous sodium aluminate solution, (d) separating the aluminum hydroxide aggregated particles from the aqueous sodium aluminate solution, and (e) continuously discharging the aqueous sodium aluminate solution out of the vessel.

摘要翻译： 平均粒径不小于40μm的氢氧化铝凝集粒子，1000kg / cm 2以上处理后的平均粒径为35μm以下，L值为 通过包括以下步骤的方法获得通过混合20ml甘油和10g不大于69的氢氧化铝凝集颗粒获得的浆料：（a）将过饱和的铝酸钠水溶液进料到容器中，（b） 将氢氧化铝种子加入到过饱和的铝酸钠水溶液中，（c）在容器中搅拌添加种子的溶液，同时连续地将额外的过饱和的铝酸钠水溶液加入到容器中以水解过饱和的铝酸钠水溶液，（d）分离 来自铝酸钠水溶液的氢氧化铝凝集颗粒，和（e）将铝酸钠水溶液连续排出容器。

公开(公告)号：US4332592A

公开(公告)日：1982-06-01

申请号：US37321

申请日：1979-05-08

申请人： Tore B. Muller

发明人： Tore B. Muller

IPC分类号： B01D9/00 ,  C01F7/14 ,  B01D9/02

CPC分类号： C01F7/147 ,  B01D9/0036 ,  C01F7/144 ,  C01P2004/61 ,  C01P2006/12 ,  Y10S159/38

摘要： A process for the continuous crystallization of at least one crystallizable material from a solution wherein a series of crystallization stages are utilized, with partial crystallization taking place in each stage. The process includes the classification of partially crystallized suspension between each stage, and the suspension from the final stage is passed to a separator wherein it is separated into a concentrated suspension containing crystals and a spent liquor, the concentrated suspension being returned to the final stage and the spent liquor being discharged. Product crystals are taken from the first stage of the series. Partially grown crystals are circulated between consecutive crystallization stages in the series such that a stream of partially crystallized suspension, after being classified to separate the coarse fraction, is passed from one stage to the next stage in the series; whereas a stream of return suspension is passed in countercurrent fashion from the next stage to the preceding one stage without classification. Coarse crystals are taken from the first stage through an elutriation column (hydraulic classification tube) in countercurrent flow to the incoming feed.

公开(公告)号：US3607113A

公开(公告)日：1971-09-21

申请号：US3607113D

申请日：1969-02-24

申请人： REYNOLDS METALS CO

发明人： FEATHERSTON RICHARD HENRY

IPC分类号： B01D9/00 ,  C01F7/14 ,  B01D9/02

CPC分类号： C01F7/147 ,  B01D9/0036 ,  B01D9/0059 ,  C01F7/144 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/10

摘要： This invention relates to a process for the continuous precipitation of alumina hydrate from aluminate liquors. More particularly, the invention relates to an improved process for continuously precipitating and separating from aluminate liquors, alumina hydrate particles characterized by spherical shape, high density and such coarseness that not less than 85 percent by weight of the product is plus 200 mesh size.

公开(公告)号：US2356547A

公开(公告)日：1944-08-22

申请号：US41720441

申请日：1941-10-30

申请人： HANS TIEDEMANN

发明人： HANS TIEDEMANN

IPC分类号： C01F7/14

CPC分类号： C01F7/147

公开(公告)号：US07704465B2

公开(公告)日：2010-04-27

申请号：US10289429

申请日：2002-11-07

申请人： Hisakatsu Kato ,  Masashi Wada ,  Naoyuki Eguchi ,  Hirofumi Sasaki

发明人： Hisakatsu Kato ,  Masashi Wada ,  Naoyuki Eguchi ,  Hirofumi Sasaki

IPC分类号： B01J19/18

CPC分类号： B01F7/00208 ,  B01F7/00641 ,  B01F7/1675 ,  B01F7/22 ,  B01F15/00837 ,  B01F2215/0431 ,  B01F2215/044 ,  B01F2215/0472 ,  B01F2215/0477 ,  B01J19/006 ,  B01J19/0066 ,  B01J19/1812 ,  B01J2219/00768 ,  C01F7/02 ,  C01F7/14 ,  C01F7/144 ,  C01F7/147 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/60 ,  C09C1/407 ,  Y10T428/2982

摘要： Aluminum hydroxide aggregated particles which have an average particle diameter of not less than 40 μm, an average particle diameter as determined after pressing at 1,000 kg/cm2 of not more than 35 μm, and an L value of slurry obtained by mixing 20 ml of glycerol and 10 g of the aluminum hydroxide aggregated particles of not more than 69, are obtained by a process comprising the steps of: (a) feeding a supersaturated aqueous sodium aluminate solution to a vessel, (b) adding aluminum hydroxide seeds to the supersaturated aqueous sodium aluminate solution, (c) stirring the seed-added solution in the vessel while continuously feeding an additional supersaturated aqueous sodium aluminate solution into the vessel to hydrolyze the supersaturated aqueous sodium aluminate solution, (d) separating the aluminum hydroxide aggregated particles from the aqueous sodium aluminate solution, and (e) continuously discharging the aqueous sodium aluminate solution out of the vessel.

摘要翻译： 平均粒径为40μm以上的氢氧化铝凝集粒子，1000kg / cm 2以上压制后测定的平均粒径为35μm以下，通过将20ml甘油 和10g不超过69的氢氧化铝凝集颗粒，通过包括以下步骤的方法获得：（a）将过饱和的铝酸钠水溶液进料到容器中，（b）将氢氧化铝种子加入到过饱和水溶液 铝酸钠溶液，（c）在容器中搅拌添加种子的溶液，同时连续向容器中加入过饱和的铝酸钠水溶液以水解过饱和的铝酸钠水溶液，（d）将氢氧化铝凝集颗粒与水溶液 铝酸钠溶液，和（e）将铝酸钠水溶液连续排出容器。