Determining the wear and abrasive properties of foundry coke

Abstract

No standard methods exist for determining the wear and abrasive properties of coke corresponding to its motion on conveyers or in the furnace shaft. A test method is proposed for determining the wear and abrasion of foundry coke, on a vibrational system; the effective total vibrational amplitude is 1.6 mm. For the tests, samples of size classes 40–60 and 60–80 mm are taken from four different batches of foundry coke. In the tests, the vibrator, equipped with a special attachment in the form of a chamber with an aluminum plate at the bottom, transmits vibrations to the coke sample. The test time is 30 min. The relative mass loss of the coke sample indicates its wear, while the relative mass loss of the aluminum plate indicates the abrasive properties of the coke. The test results correspond to coke strength M₄₀. Coke of the 60–80 mm class is more abrasive than coke of the 40–60 mm class. With increase in strength of the foundry coke, its wear is reduced by 22% for the 40–60 mm class and by 41% for the 60–80 mm class. The coke’s abrasive action is increased by a factor of 7.6 and 2.3, respectively