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。