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Milling ring of the ZGM mill

key word:Heat exchange element


Product description

The grinding ring and nozzle ring are composed of a rotating part and a stationary part. The rotating part consists of a grinding ring tray, a lining plate (12 pieces), a conical cover, etc. these parts rotate under the drive of the driving plate. The nozzle blade and the grinding ring tray are cast into a whole and rotate with the grinding plate. The stationary part is fixed on the casing. The clearance between the rotating part and the stationary part is 5 ± 2.5 mm.

The lining plate is embedded in the grinding ring tray and fastened by wedge bolts. (attention! MoS2 grease shall be applied to the joint surface of lining plate and grinding ring tray and the threaded part of all bolts.)

 

Design points of grinding plate

 

1. At present, there are two types of grinding disc, integral type and split type (grinding disc and grinding disc support split).

2. To ensure the parallelism tolerance of the upper plane relative to the lower plane, the size of the bolt hole (Φ xxxxx ± 0.5), the size of the notch (Φ xxxh7) and flatness of the lower plane, the size of the notch (Φ 2100g6) and flatness of the lower plane, and the size of the cylindrical plane (Φ xxxh8) of the grinding disc base and the reducer.

3. According to the contract conditions, the general requirements are: carefully check the surface after rough machining, and conduct flaw detection if cracks and other defects are found or suspected.

4. Familiar with the materials of grinding pad (Ni hard IV, high chromium, surfacing composition, performance, etc.).

5. The radius of curvature and the minimum thickness of the grinding pad are determined.

6. The hardness of the grinding pad is 59-62HRC after heat treatment.