The mill inlet screen is a critical screening component located at the feed end of a ball mill; it primarily serves to intercept large debris and regulate feed particle size, thereby ensuring grinding efficiency and operational stability. Its selection and application must align with the ball mill's core specifications and meet key requirements such as operational compatibility, wear resistance, clog prevention, and screening precision.

Particle size compatibility is the primary requirement for the inlet screen; the aperture size must strictly match the ball mill's feed standards. For standard ball mills with a maximum feed size of ≤30 mm, the screen aperture should be slightly smaller than the maximum feed particle size while aligning with the desired finished product specifications. A 10%–20% margin is typically reserved to prevent coarse material from passing through (due to oversized apertures) or clogging and jamming (due to undersized apertures). Regarding material composition, high wear resistance is essential; high-manganese steel is commonly used to withstand the long-term impact and abrasion caused by materials like ore and aggregate, ensuring suitability for continuous mill operations. Furthermore, the screen structure must be robust and precisely fitted to the mill inlet dimensions to ensure a tight seal and prevent material leakage or misalignment.

Based on standard industrial operating conditions, the appropriate ball mill model can be selected according to production capacity requirements. For small-scale fine grinding or low-capacity operations, the Φ2.1×1.0m ball mill is recommended; it features a rotational speed of 24.15 r/min and an hourly output of 0.8–1.05 tons, making it suitable for small-batch precision grinding. For small-to-medium-sized standard production operations, the Φ2.2×1.2m ball mill is the preferred choice; with a rotational speed of 21.8 r/min and an hourly output of 0.9–1.1 tons, it offers ample grinding media capacity and stable operation, making it suitable for grinding a wide range of ores and construction materials. Both models can be equipped with matching inlet screens to precisely control feed quality, reduce equipment wear, and improve the uniformity of the finished ground product.