Model for computational analysis of dissolved haematite and heat absorbed by oxalic acid solution during leaching of iron oxide ore

Abstract

Models for computational analysis of the concentration of dissolved haematite and heat absorbed by oxalic acid solution during
leaching of iron oxide ore have been derived. It was found that optimization of the weight input of iron oxide ore can be achieve
by comparing the concentrations of dissolved haematite at different weights of iron oxide used, with the view to identifying the
optimum weight of iron oxide ore that gives the maximum dissolution of Fe2O3.The values of Q obtained from both experiment
and model agree that the leaching of iron oxide ore using oxalic acid solution is an endothermic process and hence heat energy is
absorbed by the leaching solution and of positive values. The respective deviations of the model-predicted values of %Fe2O3 and
Q from those of the corresponding experimental values is less than 39% which is quite within the acceptable range of deviation
limit of experimental results. The constants of proportionality K and KC associated with the derived models; %Fe2O3 =K(γ/μ) and
Q=KC μ were evaluated to be 0.0683 and 66.88 respectively.