Kroll법에 의한 타이타늄 스펀지 생성에 미치는 T_iCl_4 투입속도의 영향 (Effect of T_iCl_4 Feeding Rate on the Formation of Titanium Sponge in the Kroll Process)

서지정보

· 발행기관 : 대한금속·재료학회
· 수록지 정보 : 대한금속·재료학회지 / 50권 / 10호 / 745 ~ 751페이지
· 저자명 : 이재찬, 손호상, 정재영

초록

The Kroll process for magnesium reduction of titanium tetrachloride is used for mass production of titanium sponge. The present study was conducted in a lab scale reactor to develop a better understanding of the mechanism of titanium sponge formation in the Kroll reactor with respect to reaction degrees and the feeding rate of T_iCl_4. The MgCl_2 produced during the initial stage of the reaction was not sunk into the molten magnesium, but covered the surface of the molten magnesium. As a result, subsequently fed T_iCl_4 reacted with Mg exposed on the edge of molten MgCl_2 in the crucible. Therefore, titanium sponge grew toward the center of the crucible from the edge. The temperature of the molten magnesium increased remarkably with the increasing feeding rate of TiCl_4. Consequently, fed T_iCl_4 reacted at the upper side of the crucible with evaporated Mg, and produced titanium on the upper surface of the crucible wall, which increased considerably with the feeding rate of T_iCl_4.

영어초록

The Kroll process for magnesium reduction of titanium tetrachloride is used for mass production of titanium sponge. The present study was conducted in a lab scale reactor to develop a better understanding of the mechanism of titanium sponge formation in the Kroll reactor with respect to reaction degrees and the feeding rate of T_iCl_4. The MgCl_2 produced during the initial stage of the reaction was not sunk into the molten magnesium, but covered the surface of the molten magnesium. As a result, subsequently fed T_iCl_4 reacted with Mg exposed on the edge of molten MgCl_2 in the crucible. Therefore, titanium sponge grew toward the center of the crucible from the edge. The temperature of the molten magnesium increased remarkably with the increasing feeding rate of TiCl_4. Consequently, fed T_iCl_4 reacted at the upper side of the crucible with evaporated Mg, and produced titanium on the upper surface of the crucible wall, which increased considerably with the feeding rate of T_iCl_4.

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