Flotation Cell Drive Control System Solution

With mineral resources dwindling, there is an urgent need for high-efficiency, energy-saving equipment for ore sorting. Meanwhile, the rapid advancement of new energy, new materials, and high-end equipment has raised the quality standards for minerals, creating both opportunities and challenges for advanced flotation systems. Intelligent flotation equipment, known for its efficiency, environmental friendliness, and energy savings, has become a critical component in the beneficiation process. The performance of the flotation system directly impacts the overall efficiency of the operation. Key development trends for intelligent flotation machines focus on five areas: increasing machine size, improving energy efficiency, developing specialized applications, enhancing the stability of automatic control systems, and boosting reliability. Current conventional flotation machines face significant challenges in control and maintenance: outdated and unstable control modules with low automation levels; insufficient predictive monitoring that fails to accurately capture key parameters for safe and reliable operation, falling short of full-lifecycle maintenance requirements. Additionally, traditional drive systems use asynchronous motors driving impellers via pulleys and belts. This multi-stage transmission results in low efficiency, poor power factor at the load point, and significant energy waste. The permanent magnet direct-drive (PMDD) system for flotation machines consists of a PMDD motor, a dedicated variable frequency drive (VFD), and a system control cabinet. The TYCP5 series low-speed permanent magnet motors are designed specifically for the flotation industry as a direct-drive solution. By connecting directly to the flotation impeller, they eliminate intermediate components like asynchronous motors, pulleys, and belts found in traditional systems, significantly improving operational efficiency and achieving energy conservation and emission reduction. This series covers frame sizes 90L to 450M, rated power from 0.37 to 185kW, and offers multiple rated speeds (110, 130, 160, 200, 250, 300, 360 r/min). It features full-load efficiencies between 77.2% and 95.0%, a power factor of 0.96, and a maximum torque ratio of 1.8. Available in 380V and 660V voltage ratings, each model includes a corresponding WD200 VFD selection for easy integration. The dedicated VFD employs advanced motor control algorithms optimized for Wolong high-efficiency permanent magnet motors. Utilizing vector control, it ensures precise speed regulation with high reliability, superior performance, strong scalability, multi-drive support, and flexible cabinet configuration. It supports installation of reactors and filter devices, preventing grid disturbances or interference with surrounding equipment while meeting diverse operating conditions. The WD200 series covers power ranges from 0.75kW to 1000kW, compatible with four power supply types. Its compact design enhances cabinet flexibility, saves space, and reduces costs. At 21.5Hz, it delivers 150% of rated torque (SVC); at 0Hz, it provides 200% of rated torque (FVC), ensuring excellent low-frequency characteristics and peak efficiency up to 98%. The system control cabinet integrates all internal components, using high-performance VFDs to drive motors, regulate speed, and provide comprehensive protection against overloads, overvoltage, undervoltage, and short circuits. For industrial connectivity, wireless temperature-vibration sensors and industrial Ethernet modules can be added to connect the system to the Wolong iMotorLinx Shunzhi Cloud industrial internet platform, enabling remote control, real-time monitoring, fault diagnosis, and precise alerts. Comprehensive benefit analysis of the PMDD system (based on a flotation machine with a total shaft load power of 88kW): The dedicated VFD-based PMDD solution achieves a total transmission efficiency of 90.5%, with an input active power of 97.1kW, a load-point power factor of 0.95, and an input apparent power of 102.2kVA. In contrast, the original solution using a 132kW asynchronous motor + VFD + pulley system offers only 76% total transmission efficiency, with an input active power of 115.8kW, a power factor of 0.88, and an input apparent power of 131.6kVA. After retrofitting, energy savings reach 16.1%, significantly reducing electricity consumption and alleviating apparent power demand on the grid side. This provides quantifiable evidence for energy conservation and intelligent operations management in flotation systems within mineral processing plants.

Use Cases:Flotation machines, agitated tanks, and other mineral separation equipment for flotation circuits in non-ferrous and ferrous metal concentrators