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267 条记录 (耗时 0.014 秒)

    Process for recovery of niobium values for use in preparing niobium alloy products
    22.
    发明授权
    Process for recovery of niobium values for use in preparing niobium alloy products 失效
    用于回收铌合金制品的方法

    公开(公告)号：US4164417A

    公开(公告)日：1979-08-14

    申请号：US901069

    申请日：1978-04-28

    申请人： Robert A. Gustison

    发明人： Robert A. Gustison

    IPC分类号： C22B34/20 ,  C01G33/00 ,  C22B34/24 ,  C22C1/00 ,  C22C1/02 ,  C22C27/02

    CPC分类号： C01G33/00 ,  C22B34/24 ,  C01P2006/80 ,  Y02P10/234

    摘要： The invention disclosed provides a process for recovering niobium values from aqueous hydrofluoric acid solutions by evaporating said solution to dryness and baking the residue at temperatures of 150.degree. to 250.degree. C. The solid residue is niobium oxyfluroide (NbO.sub.2 F) which may then be exothermically reduced with aluminum in the presence of an alloying element such as iron, nickel, or chromium to produce a niobium alloy. The evaporated hydrofluoric acid may be recovered by condensing or absorbing the evolved vapors.

    摘要翻译： 所公开的发明提供了一种从氢氟酸水溶液中回收铌值的方法，通过将所述溶液蒸发至干，并在150-250℃的温度下烘烤该残留物。固体残余物是铌氧芴（NbO 2 F），然后可以放热降低 在合金元素例如铁，镍或铬的存在下用铝制造铌合金。 蒸发的氢氟酸可以通过冷凝或吸收放出的蒸气来回收。

    Method of upgrading tantalum and niobium concentration in slags
    23.
    发明授权
    Method of upgrading tantalum and niobium concentration in slags 失效
    在炉渣中提高钽和铌浓度的方法

    公开(公告)号：US3972710A

    公开(公告)日：1976-08-03

    申请号：US594202

    申请日：1975-07-09

    申请人： Horst Meyer

    发明人： Horst Meyer

    IPC分类号： C01G35/00 ,  C22B3/26 ,  C22B34/24

    CPC分类号： C01G35/003 ,  C22B3/0021 ,  C22B34/24 ,  Y02P10/234

    摘要： In a method for upgrading the concentration of tantalum and niobium in slags and residues by treating the slags or residues or ore with hydrofluoric acid or a mixture of hydrofluoric acid and sulfuric acid to dissolve the tantalum and niobium and extracting the tantalum and niobium from the resulting solution with a ketone to obtain the said elements and a spent acid, the improvement comprising first treating the slags, residue or ore with spent acid containing hydrofluoric acid and/or silicofluoric acid before the dissolution step.

    摘要翻译： 在通过用氢氟酸或氢氟酸和硫酸的混合物处理炉渣或残渣或矿石来提高炉渣和残渣中钽和铌的浓度的方法中，以溶解钽和铌，并从所得到的钽和铌中提取钽和铌 溶液与酮反应获得所述元素和废酸，其改进包括首先在溶解步骤之前用含有氢氟酸和/或硅氟酸的废酸处理渣，残渣或矿石。

    Removal of lead from columbium mineral concentrate
    24.
    发明授权
    Removal of lead from columbium mineral concentrate 失效
    从ium矿精矿中去除铅

    公开(公告)号：US3862836A

    公开(公告)日：1975-01-28

    申请号：US25440672

    申请日：1972-05-18

    申请人： MOLYBDENUM CORP

    发明人： KENTRO DAN M ,  COLE JAMES W

    IPC分类号： C22B1/08 ,  C22B34/24 ,  C22B1/00

    CPC分类号： C22B1/08 ,  C22B34/24

    摘要： A process for removing lead from columbium bearing material, such as minerals and concentrates, which comprises heating the material to at least about 650*C with up to 50% by weight of an inorganic metal chloride, or ammonium chloride, alkaline earth metal chlorides being preferred.

    摘要翻译： 一种从含铌的材料如矿物质和浓缩物中除去铅的方法，其包括用高达50重量％的无机金属氯化物或氯化铵，碱土金属氯化物将材料加热至至少约650℃ 首选。

    Upgrading the tantalum and columbium contents of oxidic metallurgical products
    25.
    发明授权
    Upgrading the tantalum and columbium contents of oxidic metallurgical products 失效
    升级氧化冶金产品的钽和铜含量

    公开(公告)号：US3658511A

    公开(公告)日：1972-04-25

    申请号：US3658511D

    申请日：1969-12-22

    申请人： KAWECKI BERYLCO IND

    发明人： GUSTISON ROBERT A

    IPC分类号： C22B34/20 ,  C01G33/00 ,  C01G35/00 ,  C22B3/00 ,  C22B3/04 ,  C22B34/24 ,  C22B51/00

    CPC分类号： C22B34/24 ,  Y02P10/234

    摘要： The mineral acid leaching of a tin slag or other metallurgical product containing tantalum and columbium oxides as well as a significant amount of silica is improved, with resulting increase in the total content of tantalum and columbium oxides in the leached product obtained by filtration, by adding a controlled amount of hydrofluoric acid prior to the filtration.

    摘要翻译： 含有钽和氧化铜的锡渣或其他冶金产品的无机酸浸出得到改善，导致通过过滤获得的浸出产物中钽和氧化铌的总含量增加，通过加入 在过滤之前控制量的氢氟酸。

    Method of reclaiming tantalum from tantalum substrates having oxides of tantalum thereon
    26.
    发明授权
    Method of reclaiming tantalum from tantalum substrates having oxides of tantalum thereon 失效
    从具有氧化钇的钽基底物中回收钽酸盐的方法

    公开(公告)号：US3560259A

    公开(公告)日：1971-02-02

    申请号：US3560259D

    申请日：1969-12-04

    申请人： BELL TELEPHONE LABOR INC

    发明人： MOORE ROBERT S

    IPC分类号： C22B34/24 ,  C23G1/32 ,  C23G1/02

    CPC分类号： C23G1/32 ,  C22B34/24

    摘要： A METHOD OF RECLAIMING TANTALUM FROM A TANTALUM SUBSTRATE HAVING OXIDES OF TANBTALUM THEREON. THE TANTALUM OXIDE COVERED SUBSTRATE IS CONTACTED WITH MOLTEN KHS04 AT A TEMPERATURE IN THE RANGE OF 210*C. TO 450 C. AND IN A WEIGHT RATIO OF AT LEAST TWO PARTS OF KHS04 TO ONE PART OF COMBINED OXIDES. THE SUBSTRATE IN MANTAINED WITHIN THE ABOVE TEMPERATURE RANGE FOR A PERIOD OF TIME SUFFICIENT TO DISSOLVE TO OXIDES AND FORM A SOLUTION. THE SOLUTION COVERED SUBSTRATE IS THEN TREATED WITH WATER TO REMOVE A SOLUTION THEREFROM TO YIELD AN ESSENTIALLY OXIDE-FREE TANTALUM SUBSTRATE.