An Experimental Study on Smelting Flue Gas Desulfurization with Pyrolusite Pulp to Produce Manganese Sulphate
For the problems existed in the process that managing smelting gas and recovering SO2 to produce sulphuric acid at present,the method that producing MnSO4·H2O through smelting flue gas desulfurization with pyrolusite was put forward.This experiment studied the influences of reaction temperature,pulp pH,liquid-solid ratio and stirring speed for desulphurization rate,the leaching rate of manganese and the generation of SO42-.The results indicated that higher temperature,liquid-solid ratio and stirring speed,together with lower pulp pH(pH≈1) caused that the desulphurization rate decreased faster,the leaching rate of manganese rised at the same reaction time,the generation of SO42-increased.Evaporating and crystallizing absorption liquid after purification and decontamination can obtain manganese sulphate product,and it came up to the standard HG/T2962-1999.