気相反応による金属チタン製造用大型実験炉並びにその実験結果

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  • New Development on the Production of Ti in Crystalline Form by Gaseous Reaction of TiCl<SUB>4</SUB> and Mg
  • キソウ ハンノウ ニ ヨル キンゾク チタン セイゾウヨウ オオガタ ジッケンロ ナラビニ ソノ ジッケン ケッカ

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Experiments on the production of a high purity Ti in crystalline massive form were carried out by using a large sized reaction furnace which consisted of a reaction chamber, a condensing tank for the condensation of the byproduct MgCl2 and excess Mg, and feeders of TiCl4 and Mg. The reaction chamber consists of an inner cylinder of 18-8 stainless steel, 30 cm in diameter and 195 cm in length. Inside the reaction chamber were placed cuttings or ribbons of Ti stretched net-wise in a mild steel frame. Vapours of TiCl4 and Mg evaporated in their respective boilers were injected into the reaction chamber through the nozzles at the tops of it. The reaction mainly occurs on the surfaces of the cuttings or ribbons of Ti stretched on the frame very effectively and Ti is deposited on these surfaces and grows in crystalline form, while MgCl2 vapour or excess Mg vapour is rapidly condensed in the waste tank, being ejected out of the reaction system spontaneously. The lower part of the apparatus was reconstructed so that such the operation could be made continuous without cooling the reaction chamber and breaking its vacuum system. A number of series of experiments were carried out using this apparatus, and it was found that the method of producing Ti under gaseous reaction was of a very high efficiency in the yields of TiCl4 and Mg, in being accomplished in a single process, in requiring relatively short reaction period and in producing large lumps of crystalline Ti of a high purity free from MgCl2 or Mg. All of the produced Ti lumps were densely developed in the form of beautiful large crystals on the surfaces of Ti-ribbons and safe from the danger of absorbing moisture or of oxidation in air.

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  • 日本金属学会誌

    日本金属学会誌 23 (11), 629-633, 1959

    公益社団法人 日本金属学会

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