Hammer is an important working part of ultrafine mill, there are dozens of shapes of hammer, such as rectangle, step, polygon, ring, cutter head shape, square shape and so on. Materials are selected ordinary carbon steel, alloy steel, composite steel, and ordinary carbon steel corner surfacing wear-resistant alloy, tungsten carbide, etc., the purpose is to improve its wear resistance. The thickness of the hammer, domestic equipment is generally between 3-6 mm.
It is generally used to crush materials, when working, the material enters the crushing chamber from the feed port, is crushed by the blow of the high-speed rotating hammer, the crushing material flies to the tooth plate at a higher speed, and the tooth plate impact and further broken, and then springs back again by the impact of the hammer plate rotary dryer, at the same time, the material is also subjected to the friction and shear effect of the hammer end and the sieve plate. When the material is crushed to a certain extent, the particles smaller than the sieve hole are discharged from the crushing chamber, and the particles larger than the sieve hole continue to be crushed together with the newly entered material.
At present, the hammer shape and geometric size of China's hammer ultrafine mill has been included in the standards issued by the Ministry of Agricultural Machinery, and its specifications are:
The thickness of the hammer has a great relationship with the production capacity of the ultrafine mill. It is generally believed that in a certain range of crushing material conditions, the production capacity of thin hammer is higher than that of thick hammer. Therefore, in the design of the hammer thickness as an important parameter affecting the production capacity.
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