APPARATUS FOR PRODUCING HIGH-PURITY Y

• Main Authors: NISHIMURA EIJI, SHINDO YUICHIRO, KUROKI MASAMI
• Format: Patent
• Language: English
• Published: 24.06.1992
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

PURPOSE:To produce the high-purity Y by a fused salt electrolysis method by using a crucible consisting of graphite, Mo, Ta, and W for a vessel as an anode and electrolyzing Y metal as the anode. CONSTITUTION:The crucible 4 consisting of >=1 kinds among the graphite, Mo, Ta, and W is used for the vessel as the anode. The above-mentioned graphite crucible 4 is inserted into a crucible 3 and powdery LiCl and KCl are put therein. This crucible is put into an electrolytic cell vessel 2. This vessel is capped and is set in an electric oven 1. While the outlet is discharged, the LiCl and KCl are heated and gaseous Ar is introduced therein. A crude Y metal 11 is charged from a hole 10 of the electrolytic cap 9 and YCl3 is introduced simultaneously with gaseous Ar into the bath. A cathode electrode rod 8 is inserted into the bath and an electrolysis is effected at about 0.1 to 2A/cm initial cathode current and about 600 to 900 deg.C electrolytic temp. The electrodeposited Y is pulled up and taken out onto the cathode 8 and is desorbed. The desorbed Y is put into a graphite container partly bored with a hole and is subjected to vacuum vapor deposition.