Abstract: Due to the special nature of the load in the mine waste disposal system—the water-isolated slurry pump at the sand pumping station—the use of high-voltage frequency converters can greatly improve the on-site production process requirements and achieve the goal of energy saving and consumption reduction for enterprises. Keywords : mine waste disposal system, high-voltage frequency converter, water-isolated slurry pump [b]1 Introduction[/b] A company's No. 2 tailings treatment plant uses four sets of LGSB water-isolated slurry pump waste disposal systems from Shenyang Pump Industry Co., Ltd. Each treatment system consists of three cabinet isolation tanks, and a 220kW water pump (representing the output power of the prime mover, the same below) provides high-pressure clean water. Due to various reasons, these four sets of water pumps providing high-pressure clean water need to be repaired on average every seven or eight days, often facing the situation of reduced production or even shutdown. To this end, a 450kW high-power water pump was temporarily added to provide high-pressure clean water to two of the treatment systems, which can both ensure production and facilitate maintenance; when one of the treatment systems needs maintenance, the pump speed is reduced by using a frequency converter, thereby achieving the purpose of reducing water pressure, reducing flow rate, and saving energy. The project uses the HIVERT series 6kV, 800kVA high-voltage high-power frequency converter, independently developed and produced by Beijing Hekang Yisheng Technology Co., Ltd. It features full-load operation within a voltage range of +10% to -20%, dual-system power supply for control, full-Chinese true-color LCD touchscreen display, instantaneous overcurrent limiting function (no tripping function), instantaneous power outage tracking function, built-in PID and AVR functions, numerous input and output interfaces, standard communication protocol, perfect waveform, high power factor, and no need to replace ordinary user motors or reduce capacity. [b]2 Application of HIVERT High-Voltage Frequency Converter in Mine Waste Discharge System 2.1 Brief Description of Iron Ore Processing[/b] Ore mining is divided into open-pit mining and underground horizontal tunnel mining. Iron ore mining is no exception. The mined iron ore is first crushed, and the smaller particles enter the ball mill, then pass through spiral classifiers, fine screens, magnetic separators, and filters, finally extracting the required concentrate powder as raw material for blast furnace ironmaking. The waste ore separated at each stage eventually enters the thickening tank, becoming the final tailings. After passing through the water isolation equipment of the sand pumping station, it is discharged to a storage location that neither pollutes the environment nor hinders future tailings recycling. [b][align=center]For details, please click: Application Analysis of HIVERT High-Voltage Frequency Converters in Mine Waste Discharge Systems[/align][/b]