公开(公告)号：US4865825A

公开(公告)日：1989-09-12

申请号：US90706

申请日：1987-08-28

申请人： Eric Chantriaux ,  Henri Grobelny

发明人： Eric Chantriaux ,  Henri Grobelny

IPC分类号： C01F7/14

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

摘要： A process and an apparatus for the continuous decoposition of a supersaturated sodium aluminate liquor forming a suspension in the presence of aluminium trihydroxide seed characterised by:(a) bringing into contact in a non-agitated grading decomposer a feed flow formed by the suspension and a recycling flow which is taken off in the underflow zone of the decomposer,(b) simultaneously drawing off a production flow in the same underflow zone,(c) extraction of an overflow flow at the overflow of the grading decomposer, and(d) suitable regulation in dependence on the flow rate of the feed flow, the flow rate of the recycling flow, the speed of discharge flow of the suspension in the underflow zone and the speed of rise of the suspension in the overflow zone.

摘要翻译： 一种在三氢氧化铝种子存在下形成悬浮液的过饱和铝酸钠液体的连续取代的方法和装置，其特征在于：（a）在非搅拌分级分解器中使由悬浮液形成的进料流和 在分解器的下溢区域中取出的再循环流，（b）同时在相同的下溢区域抽出生产流，（c）在分级分解器的溢流处提取溢流，和（d）合适的 依赖于进料流量的流量，再循环流量的流量，悬浮液在下溢区域中的排出流速以及悬浮液在溢流区域中的上升速度。

公开(公告)号：US4818499A

公开(公告)日：1989-04-04

申请号：US48883

申请日：1987-05-12

申请人： Eric Chantriaux ,  Henri Grobelny

发明人： Eric Chantriaux ,  Henri Grobelny

IPC分类号： C01F7/14 ,  B01J8/08 ,  B01J8/10

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

摘要： A grading decomposer apparatus for continuously decomposing a liquor of sodium aluminate supersaturated in alumina comprises a cylindrical-conical tank for containing the liquor, having an upper cylindrical portion and an overflow generally peripherally disposed in the upper portion. A centrally disposed tubular element passes from above into the upper portion of the tank; the tubular member terminates in the cylindrical portion of the tank below the overflow. The apparatus also includes an off-take from the lower portion of the tank to an outlet; liquor is recycled from the lower portion of the tank to the upper portion within the tubular element and below the overflow, and liquor is introduced into the upper portion of the tank within the tubular element and below the overflow. A static disperser is disposed within the tubular element, the liquor feed and the recycled liquor inlet in order to create a feed and tranquilization zone within the tubular element.

摘要翻译： 用于连续分解在氧化铝中过饱和的铝酸钠液体的分级分解装置包括用于容纳液体的圆柱形锥形罐，其具有上部圆柱形部分和大致外围设置在上部的溢流。 中央设置的管状元件从上方通过到罐的上部; 管状构件终止于在溢流下方的罐的圆筒形部分。 该装置还包括从罐的下部到出口的取出; 液体从罐的下部再循环到管状元件内的上部并且在溢流下方，并且液体被引入管状元件内的罐的上部并且在溢流下方。 静态分散器设置在管状元件内，液体进料和再循环液入口中，以在管状元件内形成进料和稳定区。

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。