Method for preparing manganous nitrate solution
A technology of manganese nitrate and nitric acid, applied in directions such as manganese nitrate, can solve the problems of waste of resources and low leaching rate of target metal manganese, and achieve the effects of reducing burden, fast speed and improving leaching rate
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Embodiment 1
[0015] Example 1: 100g pyrolusite powder (containing 55.5% manganese, Fe 2 O 3 6.7%, particle size of 180 mesh) and 88g of bamboo chips (1.5mm) are put into a stainless steel pressure reactor with a volume of 10L, and the concentration is 30g / L, Mn(NO 3 ) 2 4300ml of 400g / L mixed solution, sealed and stirred (stirring speed 70r / min) at 40℃~50℃ for 2h. According to the analysis results of the leaching residue after washing, the leaching rate of manganese was 99.2%.
Embodiment 2
[0016] Example 2: 1000g pyrolusite powder (containing 55.5% manganese, Fe 2 O 3 6.7%, diameter of 180 mesh) and bamboo chips (1.5mm) 1005g into the stainless steel pressure reactor with a volume of 50L, the concentration of 50g / L, Mn(NO 3 ) 2 26L of 150g / L mixed solution was leached for 1h under airtight stirring (stirring speed 60r / min) at 50℃~60℃. According to the analysis results of the leaching residue after washing, the leaching rate of manganese was 99.4%.
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