Technical Article

Mill Lining Damage

Author:xixi Addtime:2018-07-25 Click:
The mill liner damage mill lining board damage is the main form of fracture, wear, deformation and shedding of three categories.
 
The first one: fracture
 
Fracture is the most serious problem in the manufacture and application of mill liners. The reasons for this kind of problems are related to the use of the mill. Generally speaking, the 5 problems are as follows:
 
1, the chemical composition design is reasonable or not accurate control of chemical composition;
2, there are serious quality problems such as metallurgy, exceed the standard inclusion segregation;
3, there are serious casting defects, such as shrinkage, porosity, porosity, poor casting microstructure;
4, the heat treatment process design is unreasonable or the heat treatment process is not accurate;
5, stress control and eliminate unreasonable production process, such as unreasonable design of casting process, casting loose box, unreasonable opening time, grinding, welding and improper heat treatment quenching time after tempering.
 
Second: wear
 
Liner by grinding body and material on the impact of the work, sliding and rolling, and accompanied by the effect of temperature is affected by water. Medium and electrochemical corrosion dual role in wet in the mill.
 
The third kind: deformation and fall off
 
Because the liner low yield strength and high ductility. A liner will hit, to the edge of ductile deformation occurred. Liner deformation of arch serious will bolt snapped, lining plate off, causing stop grinding accident.
                  

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