摘要
随着科技的发展,钛及钛合金应用日益广泛,钛废料也与日俱增,如何脱除钛废料中固溶氧是目前钛行业亟待解决的问题。针对现有钛废料脱氧方法存在效率低、流程长、金属/熔盐分离困难等问题,提出一种以Ho作脱氧剂,在Ho/Ho_(2)O_(3)和Ho/HoOCl/HoCl_(3)平衡下直接脱除钛废料中固溶氧的新方法。热力学计算结果表明:在1200 K下,Ho/Ho_(2)O_(3)和Ho/HoOCl/HoCl_(3)平衡的脱氧极限分别为280 g/t和12 g/t。实验结果表明:在1200 K下,Ho/Ho_(2)O_(3)平衡脱氧极限为420 g/t,随着Ho_(2)O_(3)含量的降低,脱氧极限降低;相同温度下,Ho/HoOCl/HoCl_(3)平衡的脱氧极限为180 g/t,远低于Ho/Ho_(2)O_(3)平衡的脱氧极限,并且随着HoOCl含量的降低,脱氧极限降低,表明HoOCl的生成可有效促进金属Ho深度脱氧,以Ho作脱氧剂,借助HoOCl的生成可有效脱除钛废料中的固溶氧。
With the development of science and technology,the application of titanium and titanium alloys is becoming more and more extensive,and titanium scrap is also increasing.How to remove the solid dissolved oxygen in the titanium scrap is an urgent problem to be solved in the titanium industry.The existing deoxidation method has disadvantage both including low efficiency,and difficulty in separation of molten salt from metal etc.This paper proposes a new method to directly remove solid solution oxygen from the titanium scrap by using Ho as a deoxidizer under the equilibrium of Ho/Ho_(2)O_(3) and Ho/HoOCl/HoCl_(3).The thermodynamic calculation results show that the deoxidation limit of Ho/Ho_(2)O_(3) and Ho/HoOCl/HoCl_(3) equilibrium is 280 g/t and 12 g/t at 1200 K.The experimental results show that the deoxidation limit under the equilibrium of Ho/Ho_(2)O_(3) is 420 g/t at 1200 K.As the content of Ho_(2)O_(3) decreases,the deoxidation limit decreases;at the same temperature,the deoxidation limit under the equilibrium of Ho/HoOCl/HoCl_(3) is 180 g/t,much lower than the deoxidation limit of the Ho/Ho_(2)O_(3) equilibrium.The decrease of HoOCl content reduces the deoxidation limit,indicating that the formation of HoOCl effectively promotes the deep deoxidation by Ho metal.Theoretical and experimental results prove that the addtion of Ho as a deoxidizer can effectively remove the solid dissolved oxygen in the titanium scrap with the help of the generation of HoOCl.
作者
朱立国
孔令鑫
徐俊杰
徐宝强
游彦军
杨斌
李一夫
ZHU Liguo;KONG Lingxin;XU Junjie;XU Baoqiang;YOU Yanjun;YANG Bin;LI Yifu(National Engineering Laboratory for Vacuum Metallurgy,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Vacuum Metallurgy for Non-ferrous Metal of Yunnan Province,Kunming 650093,China;National Key Laboratory for Clean Application of Complex Non-ferrous Metal Resources,Kunming 650093,China)
出处
《有色金属工程》
CAS
北大核心
2022年第1期42-50,共9页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(21968013)
2017年孔令鑫高层次人才平台建设项目(KKKP201752023)
杨斌科技领军人才培养经费资助(110014078334)。
关键词
钛废料
脱氧
稀土金属
HoCl_(3)熔盐
热力学计算
titanium scrap
deoxidation
rare earth metals
HoCl_(3)molten salt
thermodynamic calculation
