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    • 6. 发明授权
    • Process for producing low soda alumina
    • 生产低苏打氧化铝的工艺
    • US5163973A
    • 1992-11-17
    • US798210
    • 1991-11-26
    • Charles D. Ellis
    • Charles D. Ellis
    • C01F7/14
    • C01F7/144C01P2004/50C01P2004/61
    • In a process for precipitating alumina hydrate from a stream of Bayer process liquor, wherein the stream is first divided into a major portion and a minor portion, the minor portion fed to an agglomeration stage and seeded with fine seed to induce precipitation and formation of a slurry, and the major portion cooled and charged with coarse seed and directed to a growth stage to induce formation of alumina hydrate product, the steps of: separating solids from the minor portion after formation of the slurry; cooling, to a temperature of between about 45.degree. C. and about 60.degree. C., the liquid remaining after separating solids from the slurry formed in the agglomeration stage; adding an amount of coarse seed to the remaining liquid to generate a slurry of fresh hydrate nuclei; and recombining the slurry of fresh hydrate nuclei with the major portion of the stream.
    • 在从Bayer工艺液流中沉淀氧化铝水合物的过程中,其中该物流首先被分成主要部分和少量部分,次要部分进料到附聚阶段,并用精细种子接种以诱导沉淀和形成 浆料,主要部分冷却并加入粗种子并引导至生长阶段以诱导形成水合氧化铝产物,步骤:在形成浆料后从少量部分分离固体; 冷却至约45℃至约60℃的温度,在从聚集阶段中形成的浆料中分离固体后剩余的液体; 向剩余的液体中加入一定量的粗种子以产生新鲜水合物核的浆料; 并将新鲜水合物核的浆料与料流的主要部分重新组合。
    • 7. 发明授权
    • Process for precipitating alumina from Bayer process liquor
    • 从拜耳处理液中沉淀氧化铝的工艺
    • US5158577A
    • 1992-10-27
    • US665340
    • 1991-03-06
    • Bruan A. HiscoxCharles D. EllisJacques E. LarocqueDenis R. Audet
    • Bruan A. HiscoxCharles D. EllisJacques E. LarocqueDenis R. Audet
    • C01F7/14
    • C01F7/144C01P2004/61
    • An improved process for precipitating alumina from Bayer process liquors is disclosed. The process involves dividing an incoming pregnant liquor stream into a minor portion of about 10 to about 25% by volume of the total incoming pregnant liquor stream, and directing that stream into a series of small tanks where the minor stream is permitted to agglomerate. Fine aluminum hydroxide seed having a median particle size of between about 30 and about 60 microns is added to this stream. The slurry resulting from the agglomeration stage is then directed to a set of larger vessels in which the growth stage will take place. At this point, the remaining portion of the pregnant liquor is combined with the slurry resulting from the agglomeration stage. A coarse seed charge of about 150 to about 600 grams/liter of seed having a median particle size of between about 80 and about 100 microns is charged into the second set of vessels. This improved process helps to increase the yield of a strong coarse aluminum trihydroxide product.
    • 公开了一种从拜耳法溶液中沉淀氧化铝的改进方法。 该方法包括将进入的怀孕液流分成总进入的怀孕液流的约10至约25体积%的小部分,并将该流引入一系列小容器中,其中少量流被允许聚集。 将中等粒度为约30至约60微米的氢氧化铝细粒子加入该料流中。 然后将由聚集阶段产生的浆料导向一组较大的容器,其中将发生生长阶段。 此时,将剩余部分的怀孕液与由聚集阶段产生的浆液组合。 将约150至约600克/升中值粒度为约80至约100微米的种子的粗种子装料装入第二组容器中。 这种改进的方法有助于提高强大的三氢氧化铝粗产物的产率。
    • 9. 发明授权
    • Asynchronous user defined functions
    • 异步用户定义的功能
    • US08584004B2
    • 2013-11-12
    • US12107959
    • 2008-04-23
    • Chris L. RaeCharles D. EllisJeffrey J. Duzak
    • Chris L. RaeCharles D. EllisJeffrey J. Duzak
    • G06F17/12
    • G06Q40/04
    • A framework for enabling users to create User Defined Functions (UDFs), which can run simultaneously without using multiple calculation threads, is provided. A calculation engine continues a remainder of calculation operations independent of a pending asynchronous function upon starting to run the asynchronous function without waiting to receive a result. The result value is introduced to the computation at a later time during the calculation cycle, when it is received or completed by the calculation engine. When the results are received, downstream operations such as dependent functions are calculated without changing a flow of dependencies within the operations.
    • 提供了允许用户创建可以同时运行而不使用多个计算线程的用户定义函数(UDF)的框架。 计算引擎在开始运行异步功能而不等待接收结果时,继续执行与待处理异步功能无关的计算运算的剩余部分。 当计算引擎接收或完成时,结果值在计算周期的较后时间被引入计算。 当接收到结果时,计算诸如依赖函数的下游操作,而不改变操作内的依赖性流。