High impact loading, material spillage and uneven flow
Metso’s processing equipment is installed on the line that produces MAF*, a finely crushed iron ore that is later melted into sinter cakes as an end product. LKAB has installed Metso Conveyor Solutions loading stations to simplify maintenance work and increase safety.
The discussion around the issues with the conveying system started when LKAB’s production team reported to Metso that there was a lot of material spillage underneath and at the side of the conveyor belt near the loading zone. The frequent flushing and cleaning of the area was time-consuming in terms of maintenance. This was not ideal, considering that the humidity in mineral processing has to be kept stable in order to avoid downstream equipment issues.
The problems were occurring because the mineral flow was uneven in the loading zone, causing the conveyor belt to be unstable. With the concentrate from two drum filters coming onto the belt in pulses and with considerable force, the belt was bouncing up and down, causing material spillage. Another disadvantage from the uneven flow in the loading zone was the constant wear and frequent replacement of the conveyor rollers.