公开(公告)号：US11987862B2

公开(公告)日：2024-05-21

申请号：US18278826

申请日：2022-02-09

申请人： Fukuoka Institute of Technology

发明人： Hironari Kubo ,  Takuto Nishida ,  Sayaka Masuda

IPC分类号： C22B3/00 ,  C22B3/06 ,  C22B3/22 ,  C22B34/24

CPC分类号： C22B3/06 ,  C22B3/22 ,  C22B34/24

摘要： A method for liquefying niobium and tantalum and a method for producing a niobium solution and a tantalum solution, which can liquefy niobium and tantalum or produce a niobium solution and a tantalum solution safely and efficiently from a smelting raw material containing niobium and tantalum. Ammonium hydrogen sulfate is mixed as a reaction agent into a powdered substance containing at least one element of niobium or tantalum, and the mixture is melted under predetermined conditions to form a molten substance. A suspension formed by dissolving the molten substance having been solidified in an aqueous solution is subjected to solid-liquid separation to recover a precipitate. The precipitate is composed of niobium and/or tantalum with few impurities, and the precipitate is dissolved in one type of acid solution selected from hydrochloric acid, sulfuric acid, or nitric acid, whereby 90% or more of niobium and/or tantalum can be leached out.

公开(公告)号：US20230416870A1

公开(公告)日：2023-12-28

申请号：US18249336

申请日：2022-05-05

申请人： BAOTOU RESEARCH INSTITUTE OF RARE EARTHS ,  NATIONAL ENGINEERING RESEARCH CENTRE OF RUIKE RARE EARTH METALLURGY AND FUNCTION MATERIALS CO., LTD.

发明人： Yubao Liu ,  Erxiong Zhao ,  Xianheng Zhang ,  Pengfei Yang ,  Yuan Li ,  Guohua Chen ,  Weidong Lv ,  Rizeng Gao ,  Xuchen Miao ,  Bing Yu ,  Fusheng Hou ,  Quanjun Zhang ,  Haitao Huang ,  Qicao Yan ,  Yang Zhang ,  Jia Kang ,  Yueyang Dong ,  Ran Liu ,  Yiren Hao

IPC分类号： C22B9/14 ,  C22C1/00 ,  C22C19/03 ,  C22B34/12 ,  C22B34/24

CPC分类号： C22B9/14 ,  C22C1/00 ,  C22C19/03 ,  C22B34/1209 ,  C22B34/24

摘要： A method for enriching niobium and titanium in a mineral containing iron, niobium, and titanium, includes: reacting raw materials comprising 1 part by weight of a mineral containing iron, niobium, and titanium, 0.1-0.8 part by weight of a nickel-containing substance and 0.2-1 part by weight of carbon at 800-1500° C. to obtain a nickel-iron alloy and a niobium-titanium rich slag, where an amount of the mineral containing iron, niobium, and titanium is counted in terms of iron element, and an amount of the nickel-containing substance is counted in terms of nickel element. The nickel-containing substance is one or more selected from the group consisting of oxides of nickel and nickel minerals.

公开(公告)号：US20230407437A1

公开(公告)日：2023-12-21

申请号：US18061998

申请日：2022-12-05

申请人： UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

发明人： Xi LAN ,  Zhancheng GUO ,  Jintao GAO ,  Zengwu WANG ,  Guoliang FENG ,  Xiang LI ,  Rong YUAN

IPC分类号： C22B34/24 ,  C22B5/10

CPC分类号： C22B34/24 ,  C22B5/10

摘要： A method and an equipment for comprehensive utilization of niobite is disclosed. The method includes the following steps: S1. adding and uniformly mixing a coal-based reducing agent to the niobite, and subsequently reducing the mixture in a reduction furnace to obtain the selective reduction product; S2. adding the selective reduction product to a super-gravity reactor where the ambient temperature is controlled to be lower than the temperature at which the niobium oxide is reduced; driven by super-gravity, reverse migrating and collecting the metal iron and the niobium-rich slag at different locations in the reactor; discharging the metallic iron tightly attached to the wall of the reactor through an iron discharging port, and discharging the niobium-rich slag enriched to the inner layer of the reactor through a slag discharging port, so that the separation of the metallic iron and the niobium-rich slag is realized in the super-gravity field.

公开(公告)号：US10718036B2

公开(公告)日：2020-07-21

申请号：US15578498

申请日：2016-06-14

申请人： GEOMEGA RESOURCES INC.

发明人： Pouya Hajiani

IPC分类号： C22B59/00 ,  C22B3/06 ,  C22B3/22 ,  C22B3/44 ,  C22B34/24

摘要： A method for hydrometallurgical extraction of rare earth elements and niobium from a an ore or a flotation concentrate containing rare earth elements, niobium, iron and alkali earth metals, the method comprising removal of the alkali earth metals using an acidic solution of a pH in a range between about 1 and about 6, leaching the rare earth elements; precipitation of the rare earth elements from a resulting pregnant leach solution using sodium hydroxide, sodium carbonate and sodium bicarbonate; physically separating metal hydroxides from a resulting leach residue containing metal hydroxides, iron oxide, silicate, and pyrochlore; removing the iron oxide by physical beneficiation and then by atmospheric acid leaching; and recovering niobium from a clean solid residue by pressurized acid leaching.

公开(公告)号：US10422025B2

公开(公告)日：2019-09-24

申请号：US15928187

申请日：2018-03-22

申请人： Paul R. Aimone ,  Evan Hinshaw

发明人： Paul R. Aimone ,  Evan Hinshaw

IPC分类号： C22C27/02 ,  C22B9/20 ,  C22B9/22 ,  C22B34/24

摘要： A tantalum or tantalum alloy which contains pure or substantially pure tantalum and at least one metal element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, Mo, W and Re to form a tantalum alloy that is resistant to aqueous corrosion. The invention also relates to the process of preparing the tantalum alloy.

公开(公告)号：US10190193B2

公开(公告)日：2019-01-29

申请号：US15030907

申请日：2014-10-21

申请人： Glencore Technology PTY LTD

发明人： Michael Matthew Hourn ,  Daniel Mallah ,  Paul Voigt ,  Duncan Turner

IPC分类号： C22B1/11 ,  C22B3/12 ,  C22B3/14 ,  C22B1/14 ,  C22B3/00 ,  C21B15/00 ,  C22B30/04 ,  C22B34/22 ,  C22B34/24

摘要： A method for treating a mineral composition containing iron, arsenic or other Group VA compounds comprises milling the mineral composition to a particle size of P80 of less than 25 μm and leaching the mineral composition in the presence of lime and/or limestone and a soluble alkali complexing agent and in the presence of an oxygen containing gas at a pH in the range of from 3.5 to 6.

公开(公告)号：US20190003012A1

公开(公告)日：2019-01-03

申请号：US15695551

申请日：2017-09-05

申请人： Companhia Brasileira de Metalurgia e Mineração

发明人： Kleber A. Sernik ,  Clovis Antonio De Faria Sousa ,  Eduardo Augusto Ayroza Galvão Ribeiro

IPC分类号： C22B34/24 ,  C22B1/24 ,  C22B4/06 ,  C22B5/16 ,  C22B9/04 ,  C22C27/02

CPC分类号： C22B34/24 ,  C22B1/24 ,  C22B4/06 ,  C22B5/04 ,  C22B5/16 ,  C22B9/04 ,  C22C27/02 ,  C22C33/00 ,  C22C35/005

摘要： Refined niobium-based ferroalloys are provided by removing lead and other impurities therefrom by a process comprising charging niobium ore concentrate and/or niobium oxide or a mixture of niobium oxides to a metallothermic reaction chamber, admixing the ore concentrate and/or niobium oxide with a reducing agent, initiating a metallothermic reaction, under reduced pressure; and allowing the reaction product to solidify and cool; crushing the reaction product or crushing the niobium-based ferroalloy previously reduced in open air, and charging the crushed product to a melting crucible within a vacuum induction melting furnace, lowering the pressure within the furnace to below 1 mbar, and melting the crushed product while vaporizing the impurities contained therein.

公开(公告)号：US20170342526A1

公开(公告)日：2017-11-30

申请号：US15643980

申请日：2017-07-07

申请人： Paul R. Aimone ,  Evan Hinshaw

发明人： Paul R. Aimone ,  Evan Hinshaw

IPC分类号： C22C27/02 ,  C22B9/20 ,  C22B9/22 ,  C22B34/24

CPC分类号： C22C27/02 ,  C22B9/20 ,  C22B9/22 ,  C22B34/24

摘要： A tantalum or tantalum alloy which contains pure or substantially pure tantalum and at least one metal element selected from the group consisting of Ru, Rh, Pd, Os, Ir, Pt, Mo, W and Re to form a tantalum alloy that is resistant to aqueous corrosion. The invention also relates to the process of preparing the tantalum alloy.

公开(公告)号：US09466433B2

公开(公告)日：2016-10-11

申请号：US14624590

申请日：2015-02-18

申请人： H. C. STARCK GMBH

发明人： Christoph Schnitter ,  Holger Brumm

IPC分类号： H01G9/042 ,  B22F1/00 ,  B22F3/11 ,  H01G9/052 ,  B22F3/12 ,  B22F5/00 ,  C01G33/00 ,  C22B34/24

CPC分类号： H01G9/042 ,  B22F1/0096 ,  B22F3/1134 ,  B22F3/1146 ,  B22F3/12 ,  B22F5/00 ,  B22F2998/10 ,  C01G33/00 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/90 ,  C22B34/24 ,  H01G9/0525 ,  Y10T29/49002 ,  Y10T428/2982 ,  B22F3/26

摘要： A refractory metal compound agglomerate powder having a product of a BET surface area in m2/g and a sliding coefficient of η of 0.33 to 0.95, wherein the refractory metal compound agglomerate powder is selected from niobium agglomerate powder, niobium suboxide agglomerate powder, and tantalum agglomerate powder.

摘要翻译： 具有BET表面积（m 2 / g）和η的滑动系数为0.33〜0.95的难熔金属化合物附聚物粉末，其中难熔金属化合物附聚物粉末选自铌团聚体粉末，低氧化铌附聚物粉末和钽 附聚粉末。

公开(公告)号：US09085468B2

公开(公告)日：2015-07-21

申请号：US13467070

申请日：2012-05-09

申请人： Christoph Schnitter ,  Holger Brumm ,  Christine Rawohl ,  Colin McCracken

发明人： Christoph Schnitter ,  Holger Brumm ,  Christine Rawohl ,  Colin McCracken

IPC分类号： C01G31/02 ,  C01G33/00 ,  H01G9/052 ,  C22B34/24

CPC分类号： C01G33/00 ,  C01P2002/72 ,  C01P2006/10 ,  C01P2006/12 ,  C01P2006/40 ,  C01P2006/80 ,  C22B34/24 ,  H01G9/0525 ,  Y10T29/417 ,  Y10T428/12819 ,  Y10T428/2982

摘要： A niobium suboxide powder comprising niobium suboxide particles having a bulk nitrogen content of between 500 to 20,000 ppm. The nitrogen is distributed in the bulk of the powder particles. The nitrogen at least partly is present in the form of at least one of Nb2N crystals or niobium oxynitride crystals.

摘要翻译： 一种低氧化铌粉末，其包含体积氮含量在500至20,000ppm之间的低氧化铌颗粒。 氮分散在大部分粉末颗粒中。 氮至少部分以Nb 2 N晶体或铌氧氮化物晶体中的至少一种形式存在。