Method for preparing manganous nitrate solution
A technology of manganese nitrate and nitric acid, applied in the direction of manganese nitrate, etc., can solve the problems of low leaching rate of target metal manganese, waste of resources, etc., and achieve the effects of fast speed, reduced burden, and low energy consumption
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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 reed powder (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%, particle size of 180 mesh) and 1005g of reed powder (1.5mm) are put into a stainless steel pressure reactor with a volume of 50L, and the concentration is 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 is 99.5%.
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