Method for preparing cell level manganese sulfate by reducing manganese ores at medium and low temperature

The invention discloses a method for preparing cell level manganese sulfate by reducing manganese ores at medium and low temperature. The method specifically comprises the following steps that (1) manganese oxide ores and biomass fuel are smashed and levigated respectively, and then mixed uniformly at the weight proportion of 1000 : (100 to 200), so that a mixed material is obtained; (2) the mixedmaterial is calcinated for 50-90 minutes at the medium and low temperature of 550-600 DEG C, and then naturally cooled to be 50 DEG C or below under a sealing condition, so that a manganese monoxideproduct is obtained; (3) water and a compound rinsing agent are added into the manganese monoxide product at the proportion of 1000g : (1.0 to 1.5 L) : (10 to 15g), and stirred, and solid-liquid separation is conducted, so that a manganese monoxide wet product is obtained; and (4) water and sulphuric acid are added into the manganese monoxide wet product at the proportion of 1000g : (2.5-3.0L) : (360 to 375mL) to be subjec