Contact angle of Iron Ore Fines: Measurement and Analysis

  • Xiaobo Huang College of Materials Science and Engineering, Chongqing University, Chongqing 400044
  • Xuewei Lv College of Materials Science and Engineering, Chongqing University, Chongqing 400044
  • Chenguang Bai College of Materials Science and Engineering, Chongqing University, Chongqing 400044
  • Rende Zhang College of Materials Science and Engineering, Chongqing University, Chongqing 400044
  • Maojun Zhou Ironmaking plant, Baoshan Iron & Steel Co., Ltd., Shanghai 201900

Abstract


The relative contact angle (θRCA) for seven iron ore fines was measured by using Washburn Osmotic Pressure method under laboratory conditions. By choosing cyclohexane as the reference liquid that can perfectly wet the surface of iron ores and using water as the testing liquid, the relative contact angles for the seven iron ores were measured and varied from 55° to 73°. Some physicochemical properties showed a great influence on relative contact angle. In this paper, the curve of the cosine of θRCA (cos(θRCA)) versus the weight ratio of Fe2O3H/LOI (hematite/loss on ignition) was fitted to an empirical exponential equation with Radj2 larger than 0.92. The measured relative contact angles were found to be in good agreement (Radj2 >0.97) with the calculated contact angles based on the research from Simon M. Iveson, et al. (2004). Besides, an increase in surface morphology index (SMI) and pore volume improved the wettability of the iron ores. Wettability has a great influence on granule strength and the amount of water absorbed, the granulation of a sinter mixture can be enhanced by modifying the mentioned physicochemical properties. The modification of physicochemical properties on iron ores would be another topic in the further study on granulation.

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Published
2015/02/24
How to Cite
Huang, X., Lv, X., Bai, C., Zhang, R., & Zhou, M. (2015). Contact angle of Iron Ore Fines: Measurement and Analysis. Journal of Mining and Metallurgy, Section B: Metallurgy, 51(1), 33. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/6663
Issue
Vol. 51 No. 1 (2015)
Section
Original Scientific Paper

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