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We investigated the feasibility of roasting domestic vanadium titanium-magnetite ore in a rotary kiln as a pretreatment to effectively leach vanadium from the ore. Such feasibility analyses should consider the various mechanisms and aspects of rotary kilns such as structure, thermal fluid flow, heat/mass transfer, solid (ore particulate) bed behavior, and reaction/operation optimization. However, this study focused on critical process engineering factors such as the residence time of ores and temperature distributions in rotary kilns. The results show that if conventional rotary kilns are modified to resolve some issues such as possible unwanted suspension of fine solid particles and non-uniform distributions of ore bed temperatures in the kiln, an improved roasting performance can be expected. The modifications may include ensuring a sufficient roasting time by installing a circular dam at the end of the rotary kiln.

Feasibility of Applying a Rotary Kiln to Roast Vanadium in Domestic Titanium-Magnetite Ore