1. Terms and Definitions
1.1 Standard working conditions of testing
Crushing material stack density of 1.6t/m3, humidity no more than 8%, silica content no more than 2%, compressive strength of 120 MPa ~ 140MPa, limestone without clay.
1.2 Hammerhead wearing rate
The metal wear of the hammer head of a hammer crusher is expressed in g/t for processing each 1 ton material under the specified standard working conditions and crushing ratio.
1.3 Hammerhead wearing grade
The hammerhead wearing grade is a classification method to indicate the hammerhead metal wearing conditions of a hammer crusher. According to this standard, the hammerhead wear is determined and divided into three grades, 1, 2 and 3. Grade 1 indicates the smallest amount of wear, while grade 3 indicates the largest amount of wear.
1.4 Rated grade of hammerhead wearing
When the hammer crusher leaves the factory, the hammerhead wear grade is specified by the hammer crusher manufacturer according to this standard.
1.5 Using rate of material in hammerhead
Under the specified standard working conditions and a certain crushing ratio, the average ratio of the wearable hammerhead material of a hammer crusher.
1.6 Grade of using rate of material in hammerhead
The hammerhead material utilization grade is a classification method to indicate the utilization of hammerhead material of a hammer crusher. According to this standard, hammerhead material utilization is divided into three grades: 1, 2 and 3. Grade 1 indicates the highest utilization rate, while grade 3 indicates the lowest utilization rate.