1. The liner material is ZGCr5Mo, Average Hardness:≥HRC48 ; Impact toughness values: ≥30J.

2. In Normal working conditions (raw coal calorific value is greater than 4900 kcal, ash content less than 20%, grinding ball is not more than 60 mm diameter, not dozen empty grinding), the service life of the liner is about six years.We  commit to quality assurance period for 3 years. Compared with the traditional liner, double quenching medium chromium molybdenum alloy steel composite lining maintenance to decrease more than 98%.