Grindability of differentiated overburden with incorporating possibility to the Caron process
Keywords:
differentiate overburden, grinding kinetics, Caron processAbstract
The supply of lateritic overburden with nickel content lower and close to 0.9% - called differentiated overburden- constitutes a possible technological variant in the Caron process. The purpose of this research is determining the kinetic behavior of the grinding of the differentiated overburden, with the possibility of incorporating to the Caron process in Cuba, using the facilities of the conventional Bond mill of the Nickel Research Center. It was obtained that oxides and oxy-hydroxides of iron and aluminum minerals mixed with serpentines, prevail in the ore with Ni percentages of 0.845% and Fe of 40.50% that allow classifying it as differentiated overburden. The kinetic analysis of overburden milling process showed that the specific breakage rates are in the range of 0.89 min-1 to 0.20 min-1, with the highest values corresponding to the larger size fractions. The C and n parameters of the cumulative kinetic model resulted in 0.056738 and 0.384293 respectively, with a coefficient of determination higher than 88%.Downloads
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