Non-isothermal microwave leaching kinetics and absorption characteristics of primary titanium-rich materials

• Published in: Transactions of Nonferrous Metals Society of China Vol. 20; no. 4; pp. 721 - 726
• Main Author: 夏洪应 彭金辉 牛浩 黄孟阳 张正勇 张泽彪 黄铭
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2010; Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,Kunming 650093, China; Key Laboratory of Unconventional Metallurgy, Ministry of Education,Kunming University of Science and Technology, Kunming 650093, China%Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,Kunming 650093, China; Yunnan Copper Co., Ltd., Kunming 650102, China%Yunnan Copper Co., Ltd., Kunming 650102, China%Key Laboratory of Unconventional Metallurgy, Ministry of Education,Kunming University of Science and Technology, Kunming 650093, China; School of Information Science and Engineering, Yunnan University, Kunming 650091, China
• Subjects: China; Heating; Iron; Leaching; Mathematical analysis; Microwave absorption; microwave absorption characteristic; Microwaves; non-isothermal kinetics; Nonferrous metals; primary titanium-rich material; microwave absorption characteristic; non-isothermal kinetics; primary titanium-rich material
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(09)60204-1

The non-isothermal leaching kinetics of primary titanium-rich material by microwave heating was investigated,and the temperature-pressure curves of leaching system and microwave absorption characteristics of mixture solutions before and after leaching were measured.The research of non-isothermal kinetics was evaluated by the leaching rate of Fe and the total apparent velocity equation of the non-isothermal kinetics of leaching for primary titanium-rich material by microwave heating was obtained.It is shown from the temperature-pressure curves that the high temperature and high pressure of closed leaching system are favorable to the enhancement of the leaching rate of Fe.Microwave absorption characteristics of mixture solutions before and after leaching show that there are abrupt changes of microwave absorption characteristics for 15%HCl solution and the mixture solution after leaching by 20%HCl.