WI: correlações entre metodologias: o caso prático da usina do Sossego

Abstract

The Work Index (WI) represents the strength of the ore crushing and enables the calculation of the energy required to grind the ore. However, the conventional method of determination is time consuming and laborious. Therefore, processing plants have used simplified tests to suit your needs. In this context it is important that there is a correlation between the WI Bond, through essays that follow rules of standardization, with the WI of the tests done in a beneficiation plant. The idea of this study was to compare the values found by the Work Index methodology Bond, from tests done at the Federal University of Pará, with WI values obtained in the Torque mill, made by the Process Laboratory in the Sossego Plant ( VALE S / A, located in Canaã dos Carajás-PA). Both methods worked with the corresponding samples were collected in SAG mill feed, representing the feed mill during October and November, 2009, and January, 2010. It was found that there was no linear correlation between the values of WI of the methodologies used. However, the results of Bond WI correlated with the value of operating WI the plant. It can be concluded that the methodology in the Torque mill was not accurate; however it is promising, only needing to be revised some stage of the test because it is a methodology for deployment.