→ISO4700 Iron ore pellets for blast furnace and direct reduction feedstocks-Determinatino of the crushing strength
→ISO3082 Iron ores-Sampling and sample preparation procedures
→ISO3083 Iron ores-Preparation of samples-Manual method
→Max. load: 10kN/20kN
→Carry out the test on 60 or more single pellets.
→Place a test piece (single pellet) at the approximate centre of the surface-hardened portion of the lower platen. Apply the load at a constant platen speed between 10mm/min and 20mm/min throughout the test period.
→The test is complete when
－either the load falls to a value of 50% or more of the maximum load recorded
－or the platen gap has reduced to 50% of the initial mean test-piece diameter
In either case, the crushing strength is the maximum load attained in the test.