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CONCENTRATION PAR LA METHODE DE SEPARATION TRIBOELECTRIQUE, DE PRODUITS DU TYPE PYROCHLORE DIFFICILES A SEPARERKORZILOVA AP; TARASOVA TB.1975; CVETN. METALLY; S.S.S.R.; DA. 1975; NO 1; PP. 78-80Article

PRESENT SUPPLY-DEMAND SITUATION OF NIOBIUM = SITUATION ACTUELLE DE L'OFFRE ET DE LA DEMANDE POUR LE NIOBIUMTAKAI T.1974; CRYOGENICS; G.B.; DA. 1974; VOL. 14; NO 6; PP. 301-306; BIBL. 22 REF.Article

REACTION ENTRE LE PYROCHLORE ET LA POTASSE CAUSTIQUE DANS DES CONDITIONS HYDROTHERMIQUESCHUKHLANTSEV VG; DYUNOV PV; ZELIKMAN AN et al.1974; IZVEST. VYSSH. UCHEBN. ZAVED., CVETN. METALLURG.; S.S.S.R.; DA. 1974; VOL. 17; NO 2; PP. 117-120; BIBL. 9 REF.Article

PERFIL ANALTICO DO PIROCLORO = PROFIL DU PYROCHLOREMALVINI NEVES E.1973; IN: PERFIL ANAL.; RIO DE JANEIRO; DEP. NAC. PROD. MINER.; DA. 1973; VOL. 18; PP. 1-18; BIBL. 24 REF.Miscellaneous

PERFECTIONNEMENT DES TECHNIQUES D'ENRICHISSEMENT DE PRODUITS CONTENANT DU NIOBIUMTARASOVA TB.1974; CVETN. METALLY; S.S.S.R.; DA. 1974; NO 4; PP. 76-77; BIBL. 3 REF.Article

TECHNICAL NIOBIUM OXIDE FROM PYROCHLOREHABASHI F; MALINSKY I.1975; C.I.M. BULL., MONTREAL; CANADA; DA. 1975; VOL. 68; NO 761; PP. 85-90; BIBL. 25 REF.Article

HIGH TEMPERATURE CHLORINATION KINETICS OF A NIOBIUM PYROCHLORE = CINETIQUE DE CHLORURATION DE PYROCHLORE A HAUTE TEMPERATUREMEUBUS P.1979; METALLURG. TRANS. B; USA; DA. 1979; VOL. 10; NO 1; PP. 93-101; BIBL. 6 REF.Article

BREVET 2.209.847 (B) (7243692). A 8 DECEMBRE 1972. PROCEDE DE TRAITEMENT DE CONCENTRES DE PYROCHLORESsdPatent

CIENCIA E TECNOLOGIA, FATORES DE DESENVOLVIMENTO. NIOBIO, METAL EMERGENTE = SCIENCE AND TECHNOLOGY. FACTORS OF DEVELOPMENT. NIOBIUM, AN EMERGING METAL = SCIENCE ET TECHNOLOGIE. FACTEURS DE DEVELOPPEMENT. LE NIOBIUM, UN METAL QUI SE FAIT JOUROLIVEIRA MASCIMENTO J.1982; METALURGIA (SAO PAULO); ISSN 0026-0983; BRA; DA. 1982; VOL. 38; NO 299; PP. 577-584; BIBL. 15 REF.Article

Decomposition of Niobium Ore by Sodium Hydroxide Fusion MethodYANG, Xiu-Li; WANG, Xiao-Hui; CHANG WEI et al.Metallurgical and materials transactions. B, Process metallurgy and materials processing science. 2013, Vol 44, Num 1, pp 45-52, issn 1073-5615, 8 p.Article

CHEMICAL AND METALLURGICAL TREATMENT OF POOR QUALITY TANTALUM-NIOBIUM CONCENTRATESKARPUKHIN AI; BATSUEV AA; POPOV YU G et al.1982; CVETNYE METALLY; ISSN 0372-2929; SUN; DA. 1982; NO 5; PP. 57-58Article

EXTRACTION OF TITANIUM-NIOBIUM MINERALS FROM COMPLEX PEGMATITES TRANSFORMATION COMPOUNDSKURKOV AV; ZAJTSEV VG; VOROB'EV AD et al.1981; CVET. MET.; ISSN 0372-2929; SUN; DA. 1981; NO 6; PP. 109-111; BIBL. 10 REF.Article

RADIOMETRIC SEPARATION OF RADIOACTIVE RARE EARTHS TANTALUM NIOBIUM ORESARKHIPOV OA; GUSEV SS.1982; CVET. MET.; ISSN 0372-2929; SUN; DA. 1982; NO 1; PP. 88-89Article

Determination of manganese in niobite-tantalite samples by atomic absorption spectrometry = Dosage du manganèse dans des échantillons de niobite-tantalite par spectrométrie d'absorption atomiqueGANAPATHY IYER, S; PILLAI, C. K.Indian journal of technology. 1983, Vol 21, Num 10, pp 444-445, issn 0019-5669Article

Aufbereitung mineralischer Rohstoffe in Afrika: eine Herausforderung für den deutschen Anlagenbau = Processing of mineral raw materials in Africa : a challenge for German plant engineering = Préparation de matière premières minérales en Afrique : un défi pour les constructeurs allemands de matériel de préparationBUNTENBACH, Stephan; BRUDER, Uwe.AT. Aufbereitungs-Technik (1990). 2003, Vol 44, Num 3, pp 19-28, issn 1434-9302, 10 p.Article

Resultados de los ensayos pirometalúrgicos por plasma sobre concentrados españoles de minerales de niobio y tantalio. II: Aspectos termodinámicos de la vaporización secuencial de los elementos hierro, manganeso, niobio y tantalio en atmósfera plasma. Cambios estructurales producidos durante el proceso = Results of pyrometallurgical tests via plasma of spanish concentrates of niobium and tantalum bearing materials. II: thermodynamical considerations of the sequential vaporization of iron, manganese, niobium and tantalum in a plasma environment. Structural evolution during the processRUIZ, J. C; CHEJNE, F; BADIE, J. M et al.Revista de metalurgia (Madrid). 1992, Vol 28, Num 6, pp 364-368, issn 0034-8570Article

Leaching of a low-grade niobium-tantalum ore by highly concentrated caustic potash solutionHONGMING ZHOU; SHILI ZHENG; YI ZHANG et al.Hydrometallurgy (Amsterdam). 2005, Vol 80, Num 1-2, pp 83-89, issn 0304-386X, 7 p.Article

FERROCHROM- UND FERRONIOB-LEGIERUNGEN = FERRO-CHROME AND FERRO-NIOBIUM ALLOYS = ALLIAGES FERROCHROME ET FERRONIOBIUMKUDIELKA E.1982; BERG- HUETTENMAENN. MONATSH.; AUT; DA. 1982-03; VOL. 127; NO 3; PP. 57-62; BIBL. 10 REF.Article

METALLIC RESOURCES SERIES - NIOBIUMUEKI M; KADO S.1981; TETSU TO HAGANE; JPN; DA. 1981-08; VOL. 67; NO 10; PP. 1696-1707; BIBL. 33 REF.Article

PROCEEDINGS/METAL BULLETIN'S 3RD INTERNATIONAL FERRO-ALLOYS CONFERENCE, ATHENS, NOVEMBER 15-17, 1981 = ACTES DE CONGRES. 3EME CONGRES INTERNATIONAL DU "METAL BULLETIN" SUR LES FERROALLIAGES, ATHENES, 15-17 NOVEMBRE 1981TARRING TJ ED; FREEMAN L ED.1982; INTERNATIONAL FERRO-ALLOYS CONFERENCE. 3/1981-11-15/ATHENS; GBR; LONDON: METAL BULLETIN PLC; DA. 1982; 132 P.; 30 CM; ISBN 0-900542-68-3Conference Proceedings

STUDIES ON THE PREPARATION OF PURE NIOBIUM OXIDE FROM PYROCHLORE CONCENTRATEGABRA G.1983; METALL (BERL.); ISSN 0026-0746; DEU; DA. 1983-02; VOL. 37; NO 2; PP. 152-155; BIBL. 10 REF.Article

PHOTOMETRIC DETERMINATION OF NIOBIUM IN MATERIALS WITH A HIGH PHOSPHORUS CONTENT = PHOTOMETRISCHE BESTIMMUNG VON NIOB IN ROHSTOFFEN MIT EINEM HOHEN PHOSPHORGEHALT = DETERMINATION PHOTOMETRIQUE DU NIOBIUM DANS DES MATIERES PREMIERES A FORTE TENEUR EN PHOSPHORENAVROTSKAYA VA; ALEKSANDROVA EI; KLETENIK YB et al.1982; IND. LAB.; ISSN 0019-8447; USA; DA. 1982-04; VOL. 48; NO 4; PP. 341-342; BIBL. 7 REF.Article

ADDITIVE, REFRACTORY AND REACTIVE METALSFONG DG; LAW WEST D.1981; CAN. MIN. J.; CAN; DA. 1981-02; VOL. 102; NO 2; PP. 117-125Article

DIE NIOBREICHEN VERWITTERUNGSERZE DES KARBONATITS VON LUESHE/ZAIRE = THE NIOB-BEARING LATERITIC ORES OF THE LUESHE CARBONATITE, ZAIREMARAVIC HV; MORTEANI G; ROETHE GA et al.1983; ERZMETALL; ISSN 0044-2658; DEU; DA. 1983-01; VOL. 36; NO 1; PP. 29-35; BIBL. 16 REF.Conference Paper

NEUF MATIERES INDUSTRIELLES IMPORTANTES MAL REPARTIES = BAD DISTRIBUTION OF NINE IMPORTANT RAW MATERIALS1979; J. FOUR ELECTR. IND. ELECTROCHIM. (1970); ISSN 0021-8189; FRA; DA. 1979; NO 10; PP. 11Article

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