Deoxidation of Off-grade Ti scrap by Molten Mg in YCl3-MgCl2 Molten Salt

Jae-Heon Jung; So-Yeong Lee; Sung-Hun Park; Ho-Sang Sohn

doi:10.7844/kirr.2021.30.2.46

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2021 Vol.30, Issue 2 Preview Page Next Page

Research Paper

Deoxidation of Off-grade Ti scrap by Molten Mg in YCl₃-MgCl₂ Molten Salt YCl₃-MgCl₂ 혼합 용융염 중 용융 Mg에 의한 Off-grade Ti 스크랩의 탈산

30 April 2021. pp. 46-52

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Abstract

Off-grade Ti generated from smelting and mechanical processing has a high oxygen content. In this work, off-grade Ti was deoxidized using Mg and a chloride mixture as the reductant and flux, respectively. The experiments were conducted in the α-Ti temperature range (1,023~1,123 K) and the effects of the reaction time, reaction temperature, quantitiy of Mg and chloride ratio on deoxidation were investigated. Notably, when YCl₃ is used as the flux to react with MgO, it is possible to reduce the activity of MgO. Therefore Ti can be deoxidized using Mg. In this study, the O content was decreased from 0.5 wt% to 0.1004 wt% at 1073 K, for 6 hours, with Mg=3.6 g and X_{rm YCl₃}=0.22.

Keywords

Titanium

scrap

de-oxidation

REM chloride

flux

타이타늄의 제련 및 가공 공정에서 산소 농도가 높은 off-grade 스크랩이 발생되고 있다. 본 연구에서 이러한 off-grade Ti 스크랩을 혼합 염화물을 플럭스로 사용하여 Mg으로 탈산하였다. 실험은 α-Ti 영역(1,023~1,123 K)에서 실시하였으며, 반응 시간, 반응 온도, Mg양, 염화물 비율의 영향에 대하여 조사하였다. 플럭스로 사용된 YCl₃가 MgO와 반응하여 a_{rm MgO}의 활동도를 낮추어 Mg에 의한 Ti의 탈산이 가능하였으며, 1,073 K, 6시간 조건에서 Mg=3.6 g, X_{rm YCl₃}=0.22 일때 Ti scrap의 산소 농도가 0.5 %에서 최저 농도인 0.1117 %까지 감소하였다.

키워드

타이타늄

탈산

희토류 염화물

플럭스

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 30
No :2
Pages :46-52
Received Date : 2021-03-18
Revised Date : 2021-04-06
Accepted Date : 2021-04-13
DOI :https://doi.org/10.7844/kirr.2021.30.2.46

Resources RecyclingISSN:2765-3439(Print) 2765-3447(Online)한국자원리싸이클링학회

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