Characteristics of short ball mill and what materials it is suitable for processing

Key Features of Short Ball Mills: Short ball mills (aspect ratio ≤ 2) offer significant advantages in specific applications due to their compact structure:

High-Efficiency Grinding Capacity: The short, thick cylinder design allows for a more concentrated trajectory of the grinding media (steel balls/segments), resulting in stronger impact force, making them particularly suitable for rapidly pulverizing medium-hardness materials. Its optimal operating speed is 15%-20% higher than that of traditional ball mills, increasing throughput per unit time.

Energy-Saving Features: The short cylinder structure reduces ineffective frictional energy consumption, and combined with variable frequency control technology, it saves 10%-15% energy compared to long mills. During wet processing, the slurry circulation path is shortened, reducing pumping energy consumption.

Easy Maintenance: The modular liner design improves liner replacement efficiency by 50%, minimizes cylinder vibration, and extends bearing life by 30%.

Suitable Materials:

Medium-Hardness Minerals:

For materials with a Mohs hardness of 5-7, such as limestone and phosphate rock, short ball mills achieve efficient pulverization by optimizing the ball gradation (e.g., a mixed packing of 30mm and 50mm balls). 

Brittle non-metallic materials:

Quartz, feldspar, and other brittle materials are more susceptible to grain boundary fracture under the high-frequency impact of the short cylinder, resulting in an 8%-12% higher yield than traditional mills.

Pre-crushed materials:

Pre-crushed to ≤10mm in a jaw crusher/roller press can avoid over-crushing in the short ball mill, resulting in a more concentrated particle size distribution.