チタンの溶融塩電解精製に関する実験的考察―電解浴組成の影響について

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  • Studies on the Method for the Electro-Refining of Titanium from the Molten Salts. (1) Effect of the Various Molten Salt Baths on the Electro-Refining
  • チタン ノ ヨウユウエン デンカイ セイセイ ニ カンスル ジッケンテキ コウサツ デンカイヨク ソセイ ノ エイキョウ ニ ツイテ

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The effects of the compositions of molten salts on the efficiency of cathode current, yield of extraction, and purity of titanium, obtained from a soluble anode of titanium by the electrolysis of the molten salt of alkali halide, have been investigated.<BR>In this study titanium was extracted from the anode of scrap grade titanium at the temperature of the salt bath ranging from 700° to 820°C and the cathode current density from 50 to 300 amp/dm2. It was found that the ratio of extraction depends on the shape of the anode material and the current density of the anode. When the titanium of the anode was dissolved in Ti+2 ion, the titanium deposited on the cathode with the current efficiency of 65∼80%.<BR>Although the variation of the composition in salt bath and current density of cathod was not so much effective on the purity of the deposited titanium, the highest purity of the deposited titanium was obtained by the use of the molten iodide salt bath and molten chloride salt bath containing about 1% titanium ion. When the concentration of Ti ion was about 1% and the ratio of Ti+2/Ti+3 was larger than unity, the deposited titanium was obtainable in about 80% current efficiency even in the case of 80% extraction. When the deposited titanium had large crystal grains, the ratio of the content of the salt retained in the deposited titanium to the deposited titanium was lower than 1/4.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 28 (10), 633-638, 1964

    公益社団法人 日本金属学会

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