METHOD FOR REFINING SPONGE TITANIUM AND DEVICE THEREFOR

• Main Author: HIROTA MASAMI
• Format: Patent
• Language: English
• Published: 18.12.2001
• Edition: 7
• Subjects: BLASTING; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FERROUS OR NON-FERROUS ALLOYS; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; OPEN SINTERING OR LIKE APPARATUS; OVENS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; RETORTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WEAPONS

PROBLEM TO BE SOLVED: To provide a refining method by which, at the time of separating impurities such as magnesium chloride and metallic magnesium remaining in a sponge titanium at high temperature under the reduced pressure, introducing the impurities into a capacitor vessel and performing condensation, thereby separating the same away, a separating vessel is not deformed, and to provide a vacuum separating device. SOLUTION: In this refining method in which, as for the sponge titanium obtained by bringing metallic magnesium into reaction with titanium tetrachloride in a separating vessel 5 contained in a heating furnace, impuritis are removed under a reduced pressure, the pressure in the heating furnace 1 and the separating vessel 5 is reduced, and furthere, in the process of the pressure reduction, the pressure in the separating vessel 5 is made the same as that in a space part 1a between the separating vessel 5 and the heating furnace 1 or higher than that.