Abstract
The interaction of Khibins titanomagnetite concentrate (TMC) with hydrochloric acid solutions has been investigated. The decomposition of TMC in the HCl solutions has been optimized using factorial experimental design. The main factors in the efficiency of TMC decomposition with hydrochloric acid and in metal extraction into the filtrate are the HCl concentration, HCl input, processing temperature, and reaction mixture stirring time. By varying the decomposition conditions, it is possible to control the selectivity of the process: in TMC decomposition at a high temperature and a high acid concentration and input (t = 95°C, CHCl = 320−340 g/L, TMC (S): HCl (L) = 1: 10, τ = 4 h), the metals pass collectively into the solution with a large recovery factor (93–95%); at smaller values of the above parameters (t = 50−80°C, CHCl = 200–220 g/L, S: L = 1: 6–7, τ = 2 h), TMC decomposition proceeds more selectively towards iron and vanadium leaching into the solution with the minimum possible leaching of titanium (<15%).
Published Version
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