Determination of bulk properties and fracture data for iron ore pellets using instrumented confined compression experiments

In this work, an experimental method for measuring the bulk properties and fracture loading relations for iron ore pellets is presented. Knowledge on the bulk behaviour and fracture data for iron ore pellets is of great importance for improving the material transportation systems and to increase the product quality. Trustworthy numerical simulations of iron ore pellets also demand reliable material data for the models. Here, instrumented confined compression tests are carried out at different load levels. Measurement data of the axial and radial stresses and the axial displacement are recorded for each test. Measurements of fractured iron ore pellets are carried out at different loads giving rise to crushing up to 20% of the total material. From the measured data, the Poisson's ratio, the bulk modulus and a plastic strain hardening function are determined. In addition, friction measurements of iron ore pellets are carried out at different loads and configurations. In conclusion, the test method developed here is usable for the determination of the bulk properties and fracture characteristics of iron ore pellets.

An experimental method for measuring the bulk properties and a fracture load relation for iron ore pellets is presented. The Poisson's ratio, the bulk modulus and a plastic strain hardening function for iron ore pellets are determined from the tests. A fracture–load relation for iron ore pellets are determined up to 20% crushed material.Figure optionsDownload as PowerPoint slideHighlights
► An experimental method for iron ore pellets measurements is developed.
► Bulk properties and fracture data for iron ore pellets are measured.
► Poisson's ratio, bulk modulus and a plastic hardening function are determined.
► A fracture–load relation is also established.