In copper ore beneficiation processes, ball mills are one of the key pieces of equipment, and their selection directly impacts grinding efficiency and subsequent separation results. For a copper ore project with a processing capacity of 20 tons per hour (20 tph), factors such as ore particle size, hardness, moisture content, and required product fineness should be comprehensively considered.

According to industry data, if the raw ore particle size is relatively coarse (e.g., greater than 15 mm) or the hardness is high (Mohs hardness > 8), a grate-type ball mill is recommended, such as the MQG2700×3600 model. This model has a cylinder diameter of 2.7 meters and a length of 3.6 meters, with a processing capacity of approximately 15–25 tph, and is equipped with a 400 kW motor.  It uses a grate plate for forced discharge, making it suitable for coarse grinding and high-hardness ores, effectively improving crushing efficiency.

If the copper ore particle size is finer (e.g., 5–15 mm) and there are high requirements for the final product fineness, an overflow-type ball mill can be selected, such as the MQY2400×4500. This model has a processing capacity of around 20 tph, relying on the self-flow of the slurry for more thorough grinding, and is suitable for secondary grinding or fine grinding operations.