Developed the D-grade purification low-temperature ultra-fine pulverizer after multiple trials and within two months. The equipment consists of an industrial cold air blower, feed hopper, pulverizer, separator, cyclone discharge unit, exhaust air filtration device, induced draft fan, D-grade purification system, and electrical control cabinet. Standard ultra-fine pulverizers generate a significant amount of heat during operation. To reduce the temperature inside the machine chamber and pipes, a high-power cold air blower is used, with temperature control ranging from 10 to 25°C during internal material pulverization. The inlet is equipped with D-grade purification, ensuring the entire production process is carried out under D-grade clean air. Due to the material's tendency to adhere, the engineering department technicians modified the pulverizer chamber to eliminate any residue. The addition of a Siemens variable-frequency inverter allows for adjusting the discharge fineness, with the crushing fineness controlled at 100 mesh. The equipment is equipped with Siemens PLC and touch screen automation control, with the control system components being Siemens-branded (including the touch screen, PLC, expansion modules, and variable-frequency inverter). The remaining electrical components are from the Schneider brand.