Analys av Overall Effectiveness av en bandtransportör

Sammanfattning: At Boliden's mine Aitik, one of Europe's largest open-pit mines and one of the world's most efficient mines, there is still much today that can be done better to further increase the efficiency of mining. In this project, parts of the conveyor-belt infrastructure within the Aitik industrial area were investigated and analysed with the aim of increasing the efficiency and profitability of Aitik's mining operations.  The focus of the work is the main belt conveyor for Aitik's production, designated BT2030, and whether it is possible to implement section stops to increase efficiency. During the project it was investigated if it is possible to use the existing equipment that is currently not used to its full capacity on the BT2030. The focus was on the ROXON conveyor guards and the programmed sections of the conveyor and if they can be used to full capacity.  The majority of this work was done theoretically where calculations following the LEAN concept of Overall Equipment Effectiveness, also known as OEE, were presented to strengthen the theory.  In ABB's 800xA control system, belt stop logs were examined to see the reasons for belt stoppages. By taking the theoretical maximum production, time and capacity the belt has been used in practice, OEE has been applied to calculate the efficiency of BT2030. The results show that it is quite possible to implement section stop on BT2030, and that there are two options for implementation. Either use ROXON's own software and have it communicate with the control system from ABB. The alternative is to calculate the exact location of the sections to make them stop at the desired location and then implement it in the ABB control system. It was also found that the efficiency of the BT2030 could be improved. During the production study for BT2030, it came up with an OEE figure of 58.1% for the year 2021. Similarly, BT2030 comes up with an OEE of 58.5% in the first part of 2022. Overall, an OEE of 80% and above is considered world class, implying that improvements can be made to get up to that level of efficiency.