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1. Effect of microwave irradiation on selective heating behavior and magnetic separation characteristics of Panzhihua ilmenite | |||
Zhao Wei,Chen Guo,Chen Jin,Peng Jinhui | |||
Metallurgical Engineering 27 December 2013 | |||
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Abstract:The influences of microwave irradiation on the surface characteristics of Panzhihua ilmenite were systematically investigated. The crystal structures, surface morphology and surface chemical functional groups of ilmenite were characterized before and after microwave irradiation and magnetic separation for different microwave treatment times by using various methods, such as XRD, SEM, and FT-IR, respectively. XRD analysis showed that the microwave treated ilmenite has the strongest peaks of phase more than that of raw samples, indicates that the crystalline compound of ilmenite increased with the microwave irradiation time. SEM analysis showed the micro-cracking appeared at many grain boundaries of ilmenite after being pretreated by microwave treatment. The separations of ilmenite from gangue minerals were completed and the micro-fissure within ilmenite minerals were also formed, which could be attributed to the microwave selective heating characteristics of the different minerals and compounds, and the thermal stresses were caused by the uniform heat rate disturbed under microwave irradiation. The mineral processing results showed that the magnetic separation characteristics and properties of microwave treated ilmenite samples were better than that of microwave untreated ilmenite samples. It was concluded that microwave irradiation can be applied effectively and efficiently to the irradiation processes of Panzhihua ilmenite. | |||
TO cite this article:Zhao Wei,Chen Guo,Chen Jin, et al. Effect of microwave irradiation on selective heating behavior and magnetic separation characteristics of Panzhihua ilmenite[OL].[27 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4579026 |
2. Removal of Fluoride and Chloride from Zinc Oxide Dust | |||
Jin Bingjie,Zhang Yuhui,Huang Shihong | |||
Metallurgical Engineering 29 January 2013 | |||
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Abstract:Removal of fluoride and chloride from zinc oxide dust from ausmelt furnace were investigated using alkaline washing. The results show that F removal efficiency increase with an increase of alkaline concentration, alkaline washing temperature and time, but Cl removal efficiency as opposed to F removal efficiency. The L/S ratio has little effect on F and Cl removal efficiency. A new flowsheet for removal of fluoride and chloride from the secondary zinc resource was successfully proposed according to the results. F and Cl removal efficiency are more than 53.68% and 63.18% respectively using the flowsheet under optimum parameters of temperature 60 - 70 ℃, L/S ratio 3:1 and alkaline washing time 1.5h. | |||
TO cite this article:Jin Bingjie,Zhang Yuhui,Huang Shihong. Removal of Fluoride and Chloride from Zinc Oxide Dust[OL].[29 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4510214 |
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