Modernization and automation of adjustable electric drivers of the main mining conveyers was carried out at Production Units 2, 3 and 4 of JSC Belaruskali.
Before the modernization the main mining conveyers were driven by direct starting. During the starting dynamic strikes affected the mechanic system of the conveyer in a damaging way. All the elements, from the conveyer belt to the drum, suffered brief but heavy loads. As a result the conveyers often stopped working and demanded regular maintenance.
The main technical solution:
Replacing the existing electric drives into less powerful ones and reducing the number of electric drives
While carrying out modernization we applied:
Siemens electric drives
Frequency transformation plants with fluid cooling produced by PASSAT Holding on the basis of Siemens converter Sinamics S120
The following operations were carried out:
Purchase, manufacture and delivery of equipment, materials and goods to the customer,
Assembly, starting-up and adjustment of the delivered equipment.
Modernization allowed the customer:
to reduce more than two times the installed capacity of the electric drives;
to reduce the specific consumption of electric power for ore delivery by 37 %;
to increase the efficiency of the belt:
- High availability of the conveyer (97,5 %);
- Possibility to increase the efficiency of the conveyer by 20%;
- Simplicity of automation, flexibility of control systems;
- Reduction of heat emitted by the drive;
- Protection of drives from overcharges and damage;
to prevent high starting current in the network.