Field Performance of Inlet Liner for Centrifugal Slurry Pump Manufactured by NR/PBR Nanocomposite

Document Type: Original Article

Authors

1 Department of Mechanical Engineering, University of Birjand, Iran

2 Department of Chemistry, Payame Noor University, Iran

Abstract

Centrifugal slurry pumps are being used in many mineral companies to transport mineral materials. These materials are mainly abrasive and the liner of these pumps are eroded during their working life. Zinc oxide (ZnO) are usually used for enforcing rubber material but, the ZnO is harmful to the environment. Nano ZnO (n-ZnO) particles seem to purvey higher activity. In this work, the inlet liner of a centrifugal slurry pump was fabricated with n-ZnO that decreases environmental concerns and improves its wear life. The composite of inlet liner is made of Natural rubber (NR) and Polybutadiene rubber (PBR). For determining the optimal dosage of n-ZnO within the composite, mechanical properties for rubber compounds comprising 1-2 unit(s) n-ZnO, were investigated comparing to those of the compound with 5 units conventional ZnO (c-ZnO). It was found that optimal amount of n-ZnO was 1 unit which it was enough to give equivalent or better mechanical properties compared to one containing a higher amount of, namely 5 units, c-ZnO in the composite. In addition, field-emission scanning electron microscopy (FESEM) photo showed that n-ZnO particles were homogeneously dispersed in the composite. Finally, two inlet liners were manufactured, one of them was with 1 unit of n-ZnO (n-liner) and the other one with 5 units of c-ZnO (c-liner). These two liners were used in service in a plant. The field study showed that the life of n-liner was 1/3 unit more than the life of c-liner and n-liner face has been worn less than c-liner one. 

Keywords

Main Subjects


[1]     Kumar, S., Gandhi, B. K., and Mohapatra, S. K., Performance Characteristics of Centrifugal Slurry Pump with Multi-Sized Particulate Bottom and Fly Ash Mixtures, Particulate Science and Technology, Vol. 32, No. 5, 2014, pp. 466-476.

[2]     Gandhi, B. K., Singh, S. N., and Seshadri, V., Effect of Speed on the Performance Characteristics of a Centrifugal Slurry Pump, Journal of Hydraulic Engineering, Vol. 128, No. 2, 2002, pp. 225-233. 

[3]     Walker, C. I., Bodkin, G. C., Empirical Wear Relationships for Centrifugal Slurry Pumps Part 1: Side-Liners, Wear, Vol. 242, No. 1, 2000, pp. 140-146.

[4]     Walker, C. I., Slurry Pump Side-liner Wear: Comparison of Some Laboratory and Field Results, Wear, Vol. 250, No. 1, 2001, pp. 81-87.

[5]     Zengwen, H., Jinhai, C., Effect of Operating Conditions on the Wear of Wet Parts in Slurry Pumps, Wear, Vol. 162-164, 1993, pp. 1016-1021.

[6]     Wang, D., Tse, P. W., Prognostics of Slurry Pumps Based on a Moving-average Wear Degradation Index and a General Sequential Monte Carlo Method, Mechanical Systems and Signal Processing, Vol. 56–57, 2015, pp. 213-229.

[7]     Iwai, Y., Nambu, K., Slurry Wear Properties of Pump Lining Materials, Wear, Vol. 210, 1997, pp. 211-219.

[8]     Roco, M. C., Addie, G. R., Erosion Wear in Slurry Pumps and Pipes, Powder Technology, Vol. 50, 1987, pp. 35-46.

[9]     Bross, S., Addie, G., Prediction of Impeller Nose Wear Behaviour in Centrifugal Slurry Pumps, Experimental Thermal and Fluid Science, Vol. 26, 2002, pp. 841–849.

[10]  Roco, M. C., Wear Mechanisms in Centrifugal Slurry Pumps, Corrosion Engineering, Vol. 46, 1990, pp. 424-431.

[11]  Chandel, S., Singh, S. N., and Seshadri, V., Experimental Study of Erosion Wear in a Centrifugal Slurry Pump Using Coriolis Wear Test Rig, Particulate Science and Technology, Vol. 30, 2012, pp. 179–195.

[12]  Xing, D., Hai-lu, Z., and Xin-yong, W., Finite Element Analysis of Wear for Centrifugal Slurry Pump, Procedia Earth and Planetary Science, Vol. 1, 2009, pp. 1532–1538.

[13]  Boretti, L. G., Woolard, C. D., An Appropriate Model Compound for the Accelerated Sulfur Vulcanization of Polyisoprene: i. the Mechanism of Bisbenzothiazole-2, 2′-Disulfide Accelerated Vulcanization of Squalene in the Absence of ZnO, Rubber Chemistry and Technology, Vol. 79, No. 1, 2006, pp. 135-151.

[14]  Heideman, G., Noordermeer, J. W. M., Datta, R. N., and Baarle, B. V., Multifunctional Additives as Zinc-free Curatives for Sulfur Vulcanization, Rubber Chemistry and Technology, Vol. 79, No. 4, 2006, pp. 561-588.

[15]  Heideman, G., Noordermeer, J. W. M., Datta, R. N., and Baarle, B. V., Zinc Loaded Clay as Activator in Sulfur Vulcanization: a New Route for Zinc Oxide Reduction in Rubber Compounds, Rubber Chemistry and Technology, Vol. 77, No. 2, 2004, pp. 336-355.

[16]  Przybyszewska, M., Zaborski, M., Effect of Ionic Liquids and Surfactants on Zinc Oxide Nanoparticle Activity in Crosslinking of Acrylonitrile Butadiene Elastomer, Journal of Applied Polymer Science, Vol. 116, No. 1, 2010, pp. 155-164.

[17]  Akhlaghi, S., Kalaee, M., Mazinani, S., Jowdar, E., Nouri, A., Sharif, A., and Sedaghat, N., Effect of Zinc Oxide Nanoparticles on Isothermal Cure Kinetics, Morphology and Mechanical Properties of EPDM Rubber, Thermochimica Acta, Vol. 527, 2012, pp. 91-98.

[18]  Sahoo, S., Maiti, M., Ganguly, A., George, J. J., and Bhowmick, A. K., Effect of Zinc Oxide Nanoparticles as Cure Activator on the Properties of Natural Rubber and Nitrile Rubber, Journal of Applied Polymer Science, Vol. 105, No. 4, 2007, pp. 2407-2415.

[19]  Begum, P. M. S., Yusuff, K. K. M., and Joseph, R., Preparation and Use of Nano Zinc Oxide in Neoprene Rubber, International Journal of Polymeric Materials and Polymeric Biomaterials, Vol. 57, No. 12, 2008, pp. 1083-1094.

[20]  Xiong, M., Gu, G., You, B., and Wu, L., Preparation and Characterization of Poly (Styrene Butylacrylate) Latex/Nano-ZnO Nanocomposites, Journal of Applied Polymer Science, Vol. 90, No. 7, 2003, pp. 1923-1931.

[21]  Sahoo, S., Bhowmick, A. K., Influence of Zno Nanoparticles on the Cure Characteristics and Mechanical Properties of Carboxylated Nitrile Rubber, Journal of Applied Polymer Science, Vol. 106, No. 5, 2007, pp. 3077-3083.

[22]  Mottaghi, M., Khorasani, S. N., Esfahany, M. N., Farzadfar, A., and Talakesh, M. M., Comparison of the Effect of Nano ZnO and Conventional Grade ZnO on the Cross-linking Densities of NR/BR and NR/SBR Blends, Journal of Elastomers & Plastics, Vol. 44, No. 5, 2014, pp. 443-451.

[23]  Kim, I. J., Kim, W. S., Lee, D. H., Kim, W., and Bae, J. W., Effect of Nano Zinc Oxide on the Cure Characteristics and Mechanical Properties of the Silica-filled Natural Rubber/Butadiene Rubber Compounds, Journal of Applied Polymer Science, Vol. 117, No. 3, 2010, pp. 1535-1343.