酸化チタン (またはチタンスラグ)・炭素陽極を用いるマグネシウムの電解採取に関する研究
流しこみ成形陽極による150-200A実験-酸化物・炭素陽極の溶融塩電解への応用 (第6報)
1970 年 86 巻 992 号 p. 871-876
詳細
1970 年 86 巻 992 号 p. 871-876
The anode consisted of intimate mixtures of titanium dioxide (or titaniferous slag), pitch coke and pitch (or tar) was obtained by moulding method and baked at 800°C-900°C in the electric furnace. The anode was applied in a 150-200A magnesium reduction cell containing fused magnesium chloride and sodium chloride mixture.
The following results were obtained.
1) In the 150 A electrolysis by the anode containing titanium dioxide, the main constituents of the gas collected in the anode compartment were titanium tetra-chloride, carbon monoxide and carbon dioxide and its free chlorine content was less than 3 per cent. The cathodic current efficiency was very low owing to some unsuitable cell constructions for magnesium collection.
2) In the 200A electrolysis by the anode containing titaniferous slag, the reaction between the anode constituents and free chlorine was better than in the case of the anode containing titanium dioxide, while the cathodic current efficiency was yet low (about 60 per cent), because of mixing of impurities from the anode into the electrolytic bath.
It will be possible to obtain better results by improving the cell construction and operation.
