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公开(公告)号：EP0656144A4
公开(公告)日：1995-10-25
申请号：EP93917450
申请日：1993-08-13
发明人： HOLLITT MICHAEL JOHN , MCCLELLAND ROSS ALEXANDER , LIDDY MATTHEW JON WIMMERA IND , HART KAYE PATRICIA , MCGLINN PETER JOHN
摘要： The specification discloses a process for stabilising radionuclides extracted during the upgrading of minerals. The process comprises forming a composition of a radionuclide and a component and roasting the composition so that the component forms a crystalline phase having a structure that binds the radionuclides. Suitable components include a compound of a lanthanide and/or phosphorus and zirconia. Zirconia in its cubic form is useful in stabilising uranium and thorium.
摘要翻译： 该说明书公开了一种稳定矿物质升级过程中提取的放射性核素的方法。 该方法包括形成放射性核素和组分的组合物并焙烧该组合物，使得该组分形成具有结合放射性核素的结构的结晶相。 合适的组分包括镧系元素和/或磷和氧化锆的化合物。 立方体形式的氧化锆可用于稳定铀和钍。
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公开(公告)号：EP0764138A4
公开(公告)日：1997-05-21
申请号：EP95915074
申请日：1995-04-13
发明人： HOLLITT MICHAEL JOHN
IPC分类号： C01G23/04 , C22B3/04 , C22B3/14 , C22B34/12 , C01G23/053
CPC分类号： C22B34/1259 , C22B3/12 , C22B34/1254 , Y02P10/234
摘要： An industrially realistic process for alkaline leaching of a titaniferous material is disclosed. The process comprises the following process steps: (I) leaching the titaniferous material with an alkaline leachant to bring impurities in the titaniferous material into solution; and (II) treating the leachant to enhance the effectiveness of the leachant in the removal of impurities in step (I). In particular, step (II) may involve the heating of the leachant or adding additives such as sodium silicate or lime to cause the precipitation of alumina and silica.
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公开(公告)号：EP0708742A4
公开(公告)日：1997-05-28
申请号：EP94919513
申请日：1994-06-30
IPC分类号： C03C1/04
CPC分类号： C03C1/04
摘要： PCT No. PCT/AU94/00366 Sec. 371 Date Jul. 9, 1996 Sec. 102(e) Date Jul. 9, 1996 PCT Filed Jun. 30, 1994 PCT Pub. No. WO95/01313 PCT Pub. Date Jan. 12, 1995A process for producing a zirconia beating opacifier is disclosed. The process comprising the steps of: (I) heat treatment of a zirconia bearing material comprising heating the zirconia bearing material in the presence of an additive to form a heat modified product having one or more phases which, when incorporated in a glaze and the glaze fired, exhibit opacifying characteristics; and (ii) cooling the heat modified product to produce a product which can be used for imparting opacity.
摘要翻译： 公开了生产氧化锆轴承遮光剂的方法。 该方法包括以下步骤：（i）热处理含氧化锆的材料，包括在存在添加剂的情况下加热含氧化锆的材料以形成具有一个或多个相的热改性产物，当将其加入釉料和釉料中时 被解雇，展现不透明的特征; 和（ii）冷却该热改性产品以产生可用于赋予不透明性的产品。
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公开(公告)号：EP0717783A4
公开(公告)日：1997-04-23
申请号：EP94926722
申请日：1994-09-07
IPC分类号： C22B3/04 , C22B3/00 , C22B34/12 , C01G23/04 , C01G23/047
CPC分类号： C22B34/1254 , C22B3/00 , C22B34/125 , Y02P10/234
摘要： A process for upgrading a titaniferous material by removal of impurities from the titaniferous material is disclosed. The process comprises alternate leaching of the titaniferous material in a caustic leach and a pressure sulphuric acid leach.
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公开(公告)号：EP0658214A4
公开(公告)日：1996-07-03
申请号：EP93917451
申请日：1993-08-12
CPC分类号： C22B1/243 , C22B1/02 , C22B3/10 , C22B34/1204 , C22B34/1209 , C22B34/1213 , Y02P10/234
摘要： The application discloses a process for upgrading a titaniferous material by removal of impurities contained in the material especially radionuclides. The process involves heating the titaniferous material to a temperature of less than 1300 C to form a solid titaniferous phase and a liquid oxide or glassy phase in the presence of a material that promotes the formations of such phases, cooling the product at a rate that maintains the glassy phase in an amorphous state and leaching the solidified material with an acid or an alkali to remove the impurities. Materials that promote the formation of the desired phases include compounds of alkali metals and boron. Examples include borax, caustic soda, soda ash and silica.
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