Abstract
Belt conveyors play a very important role in the continuous transport o f bulk and piece material, especially in the mining industry. However, the use o f belt conveyors results in high electricity consumption. A reduction in the power consumption can be achieved by adjusting the speed o f the belt conveyor to match the material flow. However, inappropriate and frequent speed changes can cause serious damage to the conveyor elements. This paper presents a procedure for adjusting the belt conveyor speed to match the profile o f the material on the belt, as well as a detailed procedure for determining the time needed to accelerate/decelerate the belt conveyor. The research was performed on an actual 640 m long belt conveyor used for transport o f overburden at the surface mine Drmno (Serbia). The simulation results show that the speed regulation is completely justified because the conveyor operated at speeds lower than nominal throughout the testing.
Highlights
Belt conveyors have a very important role in the continuous transport of bulk and piece material due to their extremely good performances
This paper presents a procedure for adjusting the belt conveyor speed to match the cross section area of the material on the belt, as well as a detailed procedure for determining the time needed to accelerate/decelerate the belt conveyor
The research was performed on an actual 640 m long belt conveyor used for transport of overburden at the surface mine Drmno (Serbia)
Summary
Belt conveyors have a very important role in the continuous transport of bulk and piece material due to their extremely good performances (large capacity, high transport speed, large transport distance, simple construction, low maintenance costs, the ability to adapt to the terrain, reliability...) That is why they have a wide application in mining, both in underground and surface excavations. A wide range of the electric motor speed and torque control enalbes a smooth start so that the changes in the belt tensile force are much smaller than with conventional drives with hydrodynamic coupling or slip rings. This directly reduces wear of all belt conveyor parts and reduces maintenance costs. The analysis was performed in the MATLAB software package, in which the existing comprehensive expressions were implemented
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