Analysis of surface wettability of synthetic magnetite

Abstract

Relative contact angle and heat of wetting can be used to provide a measurement of surface wettability of synthetic magnetite. The comparison between synthetic and natural magnetite in terms of surface wettability showed that, using the same kind of wetting liquid, the difference in the relative contact angle was 10° between the concentrate and tailings obtained from reverse flotation of synthetic magnetite, while the difference was more than 20° between the concentrate and tailings obtained from reverse flotation of natural magnetite. As for the concentrate and tailings from reverse flotation of synthetic magnetite with water as wetting liquid, the relative ratio of their wetting heat was 106.21%. In comparison, the relative ratio of wetting heat was 176.59% for concentrate and tailings from reverse flotation of natural magnetite, showing a 70.38% difference.

Keywords

synthetic magnetite / wettability / relative wetting contact angle / heat of wetting

References

[1] Cui Z, Liu Q, Etsell TH Magnetic Properties of Ilmenite, Hematite and Oilsand Minerals after Roasting[J]. Minerals Engineering, 2002 21-1129.

[2] Yu Y, Duan Qifu The Importance of Silico-reduction and Ironincreasing to Development of China’s Iron and Steel Industry[J]. Mining and Metallurgical Engineering, 2002, 22(3): 1-6.

[3] Ludmila B, Alexandre Emelyanenko A Wetting Experiment as a Tool to Study the Physicochemical Processes accompanying the Contact of Hydrophobic and Superhydrophobic Materials withAqueous Media[J]. Advances in Colloid and Interface Science, 2012 133-141.

[4] Kramer A, Gaulocher S, Martins M, . Surface Tension Measurement for Optimization of Flotation Control [J]. Procedia Engineering, 2012 111-118.

[5] Iveson SM, Holt S, Biggs S Advancing Contact Angle of Iron Ores as a Function of Their Hematite and Goethite Content: Implications for Pelletizing and Sintering[J]. Int. J. Miner. Process, 2004 281-287.

[6] Jódar Reyes AB, Méndez Vilas A, González-Mar ML Experimental Contribution to the Understanding of Wetting of Solid Surfaces at the Meso- and Nano-scale Using Ddynamic AFM[J]. Modern Research and Educational Topics in Microscopy, 2007 502-512.

[7] Somasundaran P, Zhang L Adsorption of Surfactants on Minerals for Wettability Control in Improved Oil Recovery Processes[J]. Journal of Petroleum Science and Engineering, 2006 198-212.

[8] Lu S, Weng Da The Principle and Aapplication of Interface Separation [M], 1992 Beijing Metallurgical Industry Press 57-85.

[9] Gong Mingguang Floating Separation [M], 1988 Beijing Metallurgical Industry Press 6-43.

[10] Hu X, Huang H, Mao J, . Flotation Theory and Technology [M], 1991 Hunan Central South University Press 9-69.

[11] Xie G, Zhang M, Bian B, . Mineral Processing Technology [M], 2001 Jiangsu China University of Mining Press 388-426.

[12] Luo Lianming Ore Powder Contact Angle Measurement[J]. Chemical Mining Technology, 1989 25-26.

[13] Yao R, Wang Y, Wang Y Design and Application of Experimental Device for Measuring Contact Angle of Powder [J]. Glass & Enamel, 2005 39-42.

[14] Matrins Leal Filho M, Medida LS Angulo Contato Particulas Apatite pelo Metodo Ascensao Capilar[C]. VII Meeting of Southern Hemisphere on Mineral Technology/XXII EncontroNacional de Tratamento de Minerios e MetalurgiaExtrativa (processings)Ouro Preto-Brazil, 2007 381-388.

[15] Li Z, Yao Y, Xiao Weili Taken and Application of Wetting Degree in Surface of Mineral Grains[J]. Journal of Heilongjiang Institute of Science & Technology, 2011, 21(4): 265-267.

[16] Washburn EW The Dynamics of Capillary Flow[J]. Physical Review, 1921, l(7): 273-283.

[17] Yang B, Chang Q, He C, . Using Washburn Dynamic Method to Study the Lipophilic & Hydrophilic Property of Wastewater Treatment Filter Media[J]. ACTA Scientiae Circumstantiae, 2006, 26(11): 1 792-1 798.

[18] Hu J, Kang Wenze Action Mechanism of Floatation Reagent BET to Coal and Pyrite[J]. Journal of University of Science and Technology Beijing, 2004 349-352.

[19] Bian B, Chen Q, Wei Lubin Study on Flotation Pulp’s Magnetization Effect and Mechanism[J]. Journal of China Coal Society, 2004, 29(1): 97-100.

[20] Bian B, Chen Q, Wei Lubin Research on Coal Slime Flotation Using Magnetized Agents[J]. Journal of China Coal Society, 2004, 33(3): 109-ll2.