IDENTIFICATION OF SOLID CONTAMINANTS IN LUBRICATING OIL IN CEMENT INDUSTRY | ||||
| Journal of the Egyptian Society of Tribology | ||||
| Volume 22, Issue 3, July 2025, Page 65-79 PDF (871.4 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jest.2025.441463 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| K. S. Shimy; M. I. Khashaba; W. Y. Ali | ||||
| Department of Production Engineering and Mechanical Design, Faculty of Engineering, Minia University, El-Minia, EGYPT. | ||||
| Abstract | ||||
| Oil monitoring is a key component of successful condition monitoring programs. It can be used as a predictive tool to identify the wear modes of rubbing parts and diagnose the faults in machinery. By analyzing the oil samples, the residual life of used oil is determined and a fault in the machine can be diagnosed before the machine has to be shut down. Wear debris generated from two moving surfaces inside a machine is a direct wear product of operating machinery. The study of the debris can reveal wear mechanisms, wear modes and wear phases undergoing in the machine. The aims of this work are to establish an atlas of the solid particles contaminated in the lubricating oils of the machines used in the cement industries. This atlas helps in identifying wear particles and differentiate between them and the solid contaminants from the raw materials in the industry. The raw material used in cement manufacturing that enter to the oil as a contaminant in the oil confuses the wear debris analysis due to the nearest appearance under the microscopic inspection with that generated from wear process. Therefore, the proposed solid contaminants atlas illustrates how to distinguish between particles that came from the raw materials and wear debris while performing the oil analysis. The particles of the raw materials are collected and inspected by optical microscopic. Besides, solid contaminants are collected from the oil filters of two main equipment used in cement industry and washed with suitable solvent, then filtrated by membrane filter. The results revealed that the difference between clinker particles and wear debris can be achieved by inspection of the sample using cross-reflected light microscope. The fatty clay particles appear in brown color, while Fe2O3 particles appear in a dark brown or light black color. Limestone particle appears as crystals. The air cooled slag particles appear in light brown color containing small dark brown areas due to the low content of Fe2O3. Finally, water cold slag appears as glass particles. | ||||
| Keywords | ||||
| Wear debris; condition monitoring; oil analysis; wear particles atlas; cement industry | ||||
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