HYTEC South Africa recently custom-designed and manufactured a 6 000-ton power pack for a mine in Lephalale. Supplied in a three-metre shipping container, the solution is equipped with a pressurisation unit, control electronics and automated lighting.
The power pack was designed, manufactured and commissioned at the Rexroth HUBB in Kempton Park.
The containerised power pack controls the belt feeder on a coal conveyor to determine the amount of coal feeding into the line using proportional control. Independent knife gate control systems control the chute closing with a 350 kN force.
Its pressurisation unit supplies clean filtered air at a positive pressure to the inside of the unit, ensuring dust is kept out, and all filters have a 100% back-up system to prevent downtime.
“By using a shipping container, we are able to offer the customer a ‘movable’ hydraulic room,” said Hytec South Africa Projects Manager, Neil Griezel.
The power pack has an automated lighting system, which is activated when the door is opened, and the inside of the container acts as a secondary containment system in the event of hydraulic liquids being expelled from the system.
Sliding mounts for the electric motor and pump combinations were fitted for ease of maintenance. The whole system consists of transducers and switches, which continuously monitor system performance, and is equipped with an integrated air blast cooler.
The power pack was released following a rigorous Factory Acceptance Test, which was witnessed by the customer. The unit is currently being installed by Hytec South Africa’s professional installation team. On site at the Lephalale mine, the plug-and-play unit will be connected to all the hydraulic actuators, switched on and be ready for use.
Through a tender process, Hytec South Africa was selected as the preferred supplier for this project, not only for competitive pricing, but also innovation and technological advances.
“We were given specific mechanical parameters to ensure proper integration with the customer’s final design,” said Regional Systems Sales Engineer, Werner Voigt.
