Reduction Roasting and Acid Leaching of High-Silicon Manganese Oxide Ore
According to the existence of manganese,an experiment was carried out by adopting a processing technique consisting of reduction roasting and acid leaching to treat high-silicon manganese oxide ore.The effects of roasting temperature,roasting time,mass ratio of coal to ore,leaching temperature and time,initial sulfuric acid concentration,and liquid-solid ratio on the manganese leaching rate were all investigated.The results show that the leaching rate of manganese can reach 95.83%under the conditions including roasting temperature of 880℃,roasting time of 1.5 h,a mass ratio of 18%for coal to ore,leaching temperature of 55℃,leaching time of 2 h,initial sulfuric acid concentration of 1.80 mol/L,as well as liquid-solid ratio of 5 mL/g.
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