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Optimization of Haematite Mass-Input for Minimum Remnant Sulphur Content in Iron Ore Beneficiated with Powdered Potassium Chlorate

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Author(s): C. I. Nwoye, J. T. Nwabanne, E. M. Ameh

Journal: International Journal of Engineering Research and Applications
ISSN 2248-9622

Volume: 3;
Issue: 3;
Start page: 029;
Date: 2013;
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Keywords: Model | Optimization | Haematite Massinput | Minimum Remnant Sulphur.

ABSTRACT
A model was derived for optimization of haematite mass-input during its beneficiation with powdered potassium chlorate in order to ensure a minimum remnant sulphur condition in the ore. The polynomial model; S=0.12332-0.8042 +18.823is rooted in the expression 5.3126 x 10-2 S=6.5505 x 10-3 2- 0.0427 +1 where both sides of the expression are correspondingly approximately equal to 1. The maximum deviation of the model-predicted concentration of remnant sulphur (during the beneficiation process) from the concentrations obtained from regression model and experiment were less than 3 and 2% respectively. These translate to confidence levels of 97 and 98% respectively. The remnant sulphur content of the ore per unit massinput of iron oxide ore beneficiatedas obtained fromexperiment, derived model and regression model are0.4920, 0.5520 and 0.5335 mg/kg g-1respectively. The standard errors in predicting the remnant ore sulphur for each mass-input value of the iron oxide ore beneficiated (STEYX) is 0.3778 compared toexperimental (0.4920) and regression model (2.805 x 10-5). The measure of variability (AVEDEV) in the results of concentrations of remnant ore sulphur from regression model, experimental and modelpredicted are 6.6625, 6.6625 and 6.6430% respectively. The F-test between the derived and regression model is 0.8234 and then 0.9814 between the derived and experimental results. Evaluations from experimental results and optimization of massinput of the iron oxide ore as well as predictions by derived model (D-Model) and regression model (RModel) indicate that a minimum remnant sulphur content of the ore ≈ 18 mg/kg would be achieved at an optimum ore mass-input of 3.2616g during the beneficiation process providing the mass-input of oxidant (KClO3) and treatment temperature remained constant.
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