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The enrichment of Ni from a low-grade saprolitic laterite ore, which has been pre-treated by high pressure grinding roller(HPGR) to be 74% passing 0.074 mm and contains 0.92% Ni, 18.47% Fe, 10.61% MgO and 42.27% SiO2, was conducted by using pelletizing, rotary kiln reduction and magnetic separation process on a semi industrial scale, and the effects of reduction duration, mass ratio of coal to pellets(C/P),...
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