公开(公告)号：US09840755B2

公开(公告)日：2017-12-12

申请号：US14777835

申请日：2013-06-12

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Byung Moon Moon ,  Gang June Kim ,  Jae Yoon Lee

IPC: C22B34/12 ,  C22B9/05 ,  C22B9/22 ,  C22B9/04 ,  C22B9/00 ,  F27D7/02 ,  F27D7/06 ,  F27D11/06 ,  F27B14/06 ,  H05B6/26 ,  F27D99/00

CPC classification number: C22B34/1268 ,  C22B9/003 ,  C22B9/04 ,  C22B9/05 ,  C22B9/226 ,  C22B34/1218 ,  C22B34/1295 ,  F27B14/061 ,  F27D7/02 ,  F27D7/06 ,  F27D11/06 ,  F27D99/0006 ,  F27D2007/063 ,  F27D2007/066 ,  H05B6/26 ,  Y02P10/23 ,  Y02P10/253

Abstract: Provided are a method and apparatus for refining titanium scraps and sponge titanium, which can remove oxygen from a melt by supplying a deoxidizing gas to the surface of the melt in order to refine titanium scraps and sponge titanium. The method for refining titanium scraps and sponge titanium comprises supplying hydrogen ions and electrons in plasma to a titanium melt to remove oxygen from the titanium melt surface having an oxide layer formed thereon. In addition, the apparatus comprises: a vacuum chamber; a crucible located in the vacuum chamber and configured to perform melting by the magnetic field of an induction coil in a state in which a melt and the inner wall of the crucible; a calcium gas supply means configured to supply calcium gas from the bottom of the crucible to the space between the inner wall of the crucible and the melt.

公开(公告)号：US11125504B2

公开(公告)日：2021-09-21

申请号：US16205154

申请日：2018-11-29

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Byung Moon Moon ,  Hyun Jae Lee ,  Hyun Do Jung

IPC: H05B6/22 ,  F27B14/06 ,  C22B34/12 ,  C22B9/00 ,  H05B6/24 ,  C30B15/10

Abstract: A cold crucible structure according to an embodiment of the present invention includes a cold crucible structure according to an embodiment of the present invention includes: a cold crucible unit including hollow top and bottom caps, a plurality of segments connecting the top cap and the bottom cap, slits disposed between the segments, and a reaction area surrounded by the segments; and an induction coil unit disposed to cover the outer side of the cold crucible unit and disposed across the longitudinal directions of the segments and the slits, in which the diameter of the reaction area is defined as a crucible diameter, the crucible diameter is 100 to 300 mm, and a width of each of the slits is defined by d slit ≤ 0.3 × ∅ 50 (mm)(where dslit is the width of each of the slits and Ø is the crucible diameter).