Fault tree analysis of failure cause of crushing plant and mixing bed hall at Khoy cement factory in Iran

• We use fault tree analysis for modeling occurrence of undesired events (failures) in cement factory.
• In this model, we focused on crushing and mixing bed hall department.
• Analysis of case study extended to system and subsystem levels for each department.

Evaluating and analyzing the risk in the mining industry is a new approach for improving the machinery performance. Reliability, safety, and maintenance management based on the risk analysis can enhance the overall availability and utilization of the mining technological systems. This study investigates the failure occurrence probability of the crushing and mixing bed hall department at Azarabadegan Khoy cement plant by using fault tree analysis (FTA) method. The results of the analysis in 200 h operating interval show that the probability of failure occurrence for crushing, conveyor systems, crushing and mixing bed hall department is 73, 64, and 95 percent respectively and the conveyor belt subsystem found as the most probable system for failure. Finally, maintenance as a method of control and prevent the occurrence of failure is proposed.