The Hammer Mill is widely used for coarse/medium grinding of minerals, foodstuffs, fertilizers, and chemicals. Raw materials as big as a few tens of mm are ground to an average particle size of roughly 0.5-2mm by the impact generated from the swing hammers traveling at circumferential speeds of 40-50m/s. The machine is also used often before the fine grinding process to increase capacity and protect the fine grinding machine from wearing.
As shown in Fig.1, the material is ground by the impact generated from the swing hammers. Rugged liners are installed on the upper portion of the casing to improve the grinding efficiency as well as for wear protection. The size control screens or grates adjust the product sizes. Screens/Grates can be exchanged by opening the side cover.
The Hammer Breaker seen in Fig.2 is designed with a large feed opening and a special feed way, which prevents rebounding of raw materials. This design allows it to grind large raw materials that are too big to be fed into the Hammer mill. Only an outlet bag or a simple dust removal auxiliary facility is needed to operate this machine because only a small amount of airflow is generated. (0.5m3/min/kW) The chute portion can be exchanged for a pneumatic conveying chute if a bag filter and blower will collect the products.
Fig.1 Schematic figure of Hammer Mill
Fig.2 Schematic figure of Hammer Breaker
Fig.3 Hammer type
Fig.4 Hammer Mill H-12
Fig.5 Hammer Breaker HB-12
Fig.6 Dimensions Hammer Mill H type
Fig.7 Dimensions Hammer Breaker HB type
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