公开(公告)号：US4026989A

公开(公告)日：1977-05-31

申请号：US617979

申请日：1975-09-29

申请人： Ferenc Orban ,  Maria Orban ,  Tihamer Pinter ,  Gyorgy Zsigmond ,  Peter Siklosi ,  Karoly Solymar ,  Pal Toth ,  Janos Zambo

发明人： Ferenc Orban ,  Maria Orban ,  Tihamer Pinter ,  Gyorgy Zsigmond ,  Peter Siklosi ,  Karoly Solymar ,  Pal Toth ,  Janos Zambo

IPC分类号： C01F7/06

CPC分类号： C01F7/0633

摘要： The present invention provides for an improvement in the Bayer Aluminum manufacturing process wherein the digestion of goethite-containing bauxite is effected in higher yields, at lower temperatures and in a single step by carrying out said digestion in a wet caustic solution containing both calcium oxide and sodium chloride.

摘要翻译： 本发明提供了拜耳铝制造方法的改进，其中以较高的收率，较低的温度和一个步骤，以含有氧化钙和氧化钙的湿碱性溶液进行所述消化 氯化钠。

公开(公告)号：US4091071A

公开(公告)日：1978-05-23

申请号：US643670

申请日：1975-12-23

申请人： Jozsef Boros ,  Tibor Ferenczi ,  Gyula Horvath ,  Ferenc Lazar ,  Laszlo Lengyel ,  Jozsef Matyasi ,  Maria Orban nee Kelemen ,  Tihamer Pinter ,  Gyorgy Sigmond ,  Peter Siklosi ,  Karoly Solymar ,  Bela Toth ,  Istvan Voros ,  Kalman Wentzely ,  Janos Zambo ,  Jozsef Zoldi

发明人： Jozsef Boros ,  Tibor Ferenczi ,  Gyula Horvath ,  Ferenc Lazar ,  Laszlo Lengyel ,  Jozsef Matyasi ,  Maria Orban nee Kelemen ,  Tihamer Pinter ,  Gyorgy Sigmond ,  Peter Siklosi ,  Karoly Solymar ,  Bela Toth ,  Istvan Voros ,  Kalman Wentzely ,  Janos Zambo ,  Jozsef Zoldi

IPC分类号： C01F7/06

CPC分类号： C01F7/0633

摘要： The invention relates to an improved process for the production of alumina according to the Bayer technology, of bauxites containing goethite and especially of boehmitic or diasporic bauxites, for the acceleration of the digestion process, for the transformation of goethite into hematite, for the increase of alumina yield and for the reduction of the caustic soda losses, the essence of which consists in carrying out the digestion in the presence of 2-6% CaO and 0.2-2.0% Mg.sup.++, Fe.sup.++, Mn.sup.++ Co.sup.++ ions based on the weight of the dry bauxite or of compounds or ores containing these ions in the indicated quantities.

摘要翻译： 本发明涉及一种根据拜耳技术生产氧化铝的改进方法，含有针铁矿的铝土矿，特别是硼酸铝或铀矿铝土矿，用于加速消解过程，用于将针铁矿转变成赤铁矿，以增加 氧化铝产量和苛性钠损失的降低，其本质在于在2-6％CaO和0.2-2.0％Mg ++，Fe ++，Mn ++ Co ++离子的存在下进行消化，其基于干燥的重量 铝土矿或含有这些离子的化合物或矿石。

公开(公告)号：US3944648A

公开(公告)日：1976-03-16

申请号：US485570

申请日：1974-07-03

申请人： Karoly Solymar ,  Janos Zambo ,  Marika Orban nee Kelemen ,  Erno Bujdoso ,  Ivan Feher ,  Zoltan Ozvald ,  Istvan Voros ,  Tibor Ferenczi ,  Pal Toth ,  Ferenc Lazar ,  Tihamer Pinter ,  Gyorgy Sigmond ,  Peter Siklosi ,  Kalman Wentzely ,  Laszlo Lengyel ,  Jozsef Matyasi

发明人： Karoly Solymar ,  Janos Zambo ,  Marika Orban nee Kelemen ,  Erno Bujdoso ,  Ivan Feher ,  Zoltan Ozvald ,  Istvan Voros ,  Tibor Ferenczi ,  Pal Toth ,  Ferenc Lazar ,  Tihamer Pinter ,  Gyorgy Sigmond ,  Peter Siklosi ,  Kalman Wentzely ,  Laszlo Lengyel ,  Jozsef Matyasi

IPC分类号： C01F7/06

CPC分类号： C01F7/0633

摘要： A method for processing bauxites according to the Bayer technology, with an increased yield in Al.sub.2 O.sub.3 and with decreased caustic soda losses, starting particularly from goethite bauxites of boehmite and/or diaspore type and carrying out the digestion at 180.degree.C to 300.degree.C using an aluminate liquor containing Na.sub.2 O.sub.caustic in a concentration of 80 to 300 g./l. The digestion is carried out in the presence of a calcium compound in an amount corresponding to 2 to 6 % of CaO calculated for the dry weight of bauxite and of a sulfate salt in an amount corresponding to 1.0 to 7.0 g./l. of sulfate ion concentration, whereby the goethite content of the bauxite is converted into hematite. The process provides advantageous conditions for the complete dissolution of the boehmite and diaspore content of bauxite in the vicinity of the equilibrium molar ratio, and enables to recover efficiently the caustic soda losses in the Bayer process itself, requiring no supplementary operation.

摘要翻译： 根据拜耳技术处理铝土矿的方法，特别是从勃姆石和/或水泥浆类型的针铁矿铝土矿开始，Al2O3的产率提高，苛性钠损失降低，并在180℃至300℃下进行消化，使用 含有浓度为80至300g / l的Na2O8的铝酸盐液体。 在钙铝化合物的存在下进行消化，钙化合物的量相当于铝土矿的干重量和对应于1.0至7.0g / l的硫酸盐的2至6％的CaO。 的硫酸根离子浓度，由此将铝土矿的针铁矿含量转化为赤铁矿。 该方法提供了在平衡摩尔比附近完全溶解勃姆石和铝土矿的含量的有利条件，并且能够有效地回收拜耳法本身的苛性钠损失，不需要补充操作。

公开(公告)号：US5122349A

公开(公告)日：1992-06-16

申请号：US530085

申请日：1990-05-29

申请人： Gyorgy Banvolgyi ,  Jozsef Zoldi ,  Peter Siklosi ,  Tibor Ferenczi ,  T. Anna Csordas ,  Ivan Feher ,  Ildiko Tassy nee Varju ,  Istvan Sajo

发明人： Gyorgy Banvolgyi ,  Jozsef Zoldi ,  Peter Siklosi ,  Tibor Ferenczi ,  T. Anna Csordas ,  Ivan Feher ,  Ildiko Tassy nee Varju ,  Istvan Sajo

IPC分类号： C01F7/06

CPC分类号： C01F7/062 ,  C01F7/0666

摘要： An improvement in the process for extracting alumina from gibbsitic bauxites, wherein the basic, known process comprises mixing the bauxites with a sodium hydroxide-sodium aluminate digestion liquor, digesting the bauxites at a temperature in the range of 100.degree.-180.degree. C., diluting the resulting slurry, separating the red mud therefrom, precipitating alumina hydrate by cooling and agitation of the sodium aluminate liquor, and calcining the alumina hydrate precipitate to obtain alumina, wherein the improvement is characterized by so controlling the process that, in the liquid phase of the slurry leaving the digestion reactor, the reactive hydroxide ion concentration is maintained below 6 g/l, and preferably between 0 and 2 g/l, where the reactive hydroxide ion concentration is defined by the following formula: ##EQU1## where: C.sub.Al.sbsb.2 O.sub.3,gi.sup.eq is the equilibrium solubility of Al.sub.2 O.sub.3 for gibbsite, in g/l.C.sub.Al.sbsb.2 O.sub.3 is the actual concentration of Al.sub.2 O.sub.3, in g/l andC.sub.SiO.sbsb.2 is the actual concentration of SiO.sub.2, in g/l.Desirably, control of the process is maintained by regulating the ratio of bauxite to digestion liquor.

摘要翻译： 碱性已知方法包括将铝土矿与氢氧化钠 - 铝酸钠消化液混合，在100-180℃的温度下消化铝土矿， 稀释所得浆料，从中分离红泥，通过冷却和搅拌铝酸钠液体沉淀氧化铝水合物，并煅烧氧化铝水合物沉淀物以获得氧化铝，其中改进的特征在于控制在液相中 离开消解反应器的浆料中，反应性氢氧根离子浓度保持在6g / l以下，优选在0至2g / l之间，其中活性氢氧根离子浓度由下式定义：其中：CAl 2 O 3 gieq是三水铝矿的Al2O3平衡溶解度，单位为g / l。 CAl2O3是Al2O3的实际浓度，g / l，CSiO2是SiO2的实际浓度，单位为g / l。 理想地，通过调节铝土矿与消化液的比例来保持该方法的控制。