Abstract: The high valence manganese resources （MnO₂） have the characteristics of low solubility， while the low valence ones （MnO） are easily dissolved in acidic solution. The feasibility using rotary kiln reduction roasting technology to treat various high valence insoluble manganese resources was studied. The experimental results indicated that the technical conditions of dynamic roasting experiments in a pilot rotary kiln were consistent with that of the static roasting experiments. With the roasting temperature of 800 ℃， the roasting time of 60 min， and reductant dosage of 15%， the leaching efficiency of manganese from the domestic low-grade manganese and electrolytic manganese anode mud were 94.13% and 99.59%， respectively； With the roasting temperature was 950 ℃， the roasting time was 60 min， and the reductant dosage was 15%， the leaching efficiency of manganese from the imported high-grade manganese was 96.59%. The results confirmed that rotary kiln reduction roasting technology was adoptable for the treatment of different types of high valence manganese resources.

Key words: High valence insoluble manganese resources, Rotary kiln, Reduction roasting