PHOENOCORD® St 7500 Strongest Underground Conveyor Belt
Bottrop, Germany: In the Ruhr region, four separate coal mines have been merged into one. To achieve this enormous undertaking, RAG Deutsche Steinkohle planned for a revolutionary incline slope conveyor to be built at the Prosper Haniel mine.
The coal was to be extracted in four separate operations at depths between 700 and 1,300 meters and brought to the surface via a belt conveyor. With a vertical elevation of approximately 780 meters, the belt required for this system was not only the largest and most efficient ever designed, but the strongest.
The system is required to convey millions of tons of r.o.m. coal to the surface from a depth of around 780 meters, while simultaneously conveying millions of tons of tailings on the return run back to the bottom of the mine.
PHOENIX developed a completely new conveyor belt: The PHOENOCORD® St 7500, until today the strongest underground conveyor belt worldwide, with a width of 1400 mm.
The system, fitted with the first gearless drive seen anywhere in the world with 99% efficiency, is simultaneously conveying 2000 t/h of r.o.m. coal upward and 1000 t/h of tailings downward. Since the rock on the return line had sharper edges than the coal, the lower cover plate was designed to be thicker. Both belt covers were equipped with the special PHOENOTEC® active belt protection system.
The PHOENOCORD® St 7500 conveyor belt complies with the most stringent safety requirements in the world and has been setting benchmarks ever since for meeting demanding conditions of use in the mining industry.