Here is a brief introduction to the rod media of the rod mill.
Rod mill grinding media for the long metal rod, the rod diameter of the work medium, and more generally in the production of 50 ~ 120mm; frangible when worn too thin, too thick smashed grinding plate is easy. The length of the rod medium is 100~150mm shorter than that of the rod mill barrel. If it is too long, the mill and the end cover will be damaged by the impact. If it is too short, the mill has too much volume. In order to prevent the bending and breaking of the rod medium, the material and processing requirements are higher than the ball medium. The rod medium is generally rolled from low carbon steel (containing 0.6% to 0.8% of carbon) or containing manganese , chromium and molybdenum alloy steel, and is straightened at the heat treatment to enhance its hardness, strength and bending performance.
During the grinding process, the contact between the rod and the material to be ground is linear contact, so the material has a selective crushing effect. Therefore, the product has a uniform particle size and a light pulverization phenomenon. The rod mill should be regularly shut down for inspection, pick up the broken rods in time, and add new rods with the rod machine.
The working parameters of the rod medium are:
1. Porosity, when the rod medium is statically stacked, it is randomly arranged in two types: square and triangle;
2, density rate: the average density is higher than the ball medium;
3. Loose density;
4. Filling rate;
5, rod mill media size and size ratio generally need to be tested, but its ratio is not as strict as the ball medium.
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