Abstract
This research was conducted on 6 different supplies of South African chromite sand samples: Lil sales, Insimbi, S11594, Rand York, Pentagon and Mineral Loy. The aim of the experiment was to determine the foundry properties of chromite sand that affect its sintering temperature. Three foundry properties of chromite sand were studied: turbidity or the amount of impurities, the percentage of fine particles and percentage of silica content. The approach selected to perform the sintering test was the VDG procedure 26 from the German foundry association. The test observes the sintering behaviour of chromite sand over a range of temperature and is able to identify its sintering temperature. Using simple linear regression analysis, it was concluded that the presence of impurities, high silica content and fine particles decreases significantly the sintering temperature of chromite sand which contributed to an increase in the occurrence of casting defects.