Modeling of Knelson Concentrator Operating Parameters by Using Application of Box-Behnken Experimental Design for Chromite Ore
Selcuk Samanli1, Ozcan Oney1, Ozan Osmanli2
1Usak University, Usak, 64200 Turkey
2OKSAN Construction Transport Industry and Trade Limited Company, Usak, 64200 Turkey
Keywords: Chromite ore, Knelson concentrator, modeling and optimization, analysis of variance, Box-Behnken design
Abstract
In this study, modeling and optimization tests were conducted on enrichment of chromite ore by Knelson concentrator. For this purpose, the three-level Box-Behnken experimental design method was applied. The analysis of variance (ANOVA) was used at 95% confidence interval to test the significance of independent variables and their interactions. In order to estimate the chromite concentrate grade and chromite concentrate recovery with independent variables, quadratic polynomial regression equations were derived. Maximum concentrate grade of 54.77% and concentrated recovery values of 77.1% were reached in 12 l/min fluidization water flow rate, 1124.57 rpm bowl speed, and 21.05% solids ratio. The coefficient of multiple determination (R2) was calculated as 0.996 for concentrate grade and 0.991 for concentrate recovery. This indicates that the proposed model is a usable and effective model.
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