Method of recovering manganese sulfate from low-grade manganese carbonate and manganese oxide
A technology of manganese oxide ore and manganese carbonate, which is applied in the direction of manganate/permanganate, etc., can solve the problems of fine particle size of manganese minerals, poor economic feasibility, and high cost of beneficiation, so as to achieve simple production process, prevent environmental pollution, and improve The effect of utilization
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[0013] Example 1:
[0014] 1) Grind the manganese carbonate concentrate (manganese content of about 21%) from Guangxi Daxin Manganese Mine to below -100 mesh;
[0015] 2) Weigh 50 grams of finely ground manganese carbonate concentrate and 5 grams of FeSO 4 ·H 2 O Grind and mix evenly in a mortar to obtain a mixture;
[0016] 3) Add 30 grams of concentrated sulfuric acid with a weight concentration of 98% to the above mixture;
[0017] 4) Put the uniformly mixed materials into a 100ml quartz sintering boat and roast them in a tube furnace at 500°C for 1 hour; pass the sulfur dioxide gas generated during the roasting process into the leaching solution of low-grade manganese oxide ore, and leaching low-grade at a temperature of 50°C The leaching rate of manganese in manganese oxide ore to manganese oxide ore can reach more than 98%;
[0018] 5) The calcine obtained by sulfation was leached with 200ml of water at 60°C under stirring for 20min to obtain a manganese sulfate leaching sol...
Example Embodiment
[0022] Example 2:
[0023] 1) Grind the raw manganese oxide ore in northern Guangxi (with a manganese content of about 24%) to below -100 mesh;
[0024] 2) Weigh 50 grams of finely ground manganese oxide ore and 2 grams of pyrite, grind and mix them evenly in a mortar to obtain a mixture;
[0025] 3) Then add 28 grams of concentrated sulfuric acid with a weight concentration of 80% to the above mixture;
[0026] 4) Put the uniformly mixed materials into a 100ml quartz sintering boat and roast them in a tubular furnace at 600°C for 40 minutes; pass the sulfur dioxide gas generated during the roasting process into the leaching solution of low-grade manganese oxide ore, and leaching at a temperature of 60°C is low The manganese in the high-grade manganese oxide ore has a leaching rate of over 96%;
[0027] 5) The calcine obtained by sulfation was leached with 200ml of water at 90℃ under stirring for 20min to obtain a manganese sulfate leaching solution with PH=6~7; washed 3 times wit...
Example Embodiment
[0031] Example 3:
[0032] 1) Grind the manganese carbonate concentrate of Guangxi Daxin Manganese Mine (manganese content is about 20%) to below -100 mesh;
[0033] 2) Weigh 50 grams of finely ground manganese carbonate concentrate and 3 grams of pyrite, grind and mix evenly in a mortar to obtain a mixture;
[0034] 3) Add 32 grams of concentrated sulfuric acid with a weight concentration of 98% to the above mixture;
[0035] 4) Put the uniformly mixed materials into a 100ml quartz sintering boat and roast them in a tube furnace at 550°C for 30 minutes;
[0036]5) The calcine obtained by sulfation was leached with 200ml of water at 60℃ for 10min under stirring to obtain a manganese sulfate leaching solution with pH=6~7; washed 3 times with 20ml of water, analyzed the concentration of manganese and cobalt in the filtrate, and calculated the manganese The recovery rate is about 96%, and the leaching rate of cobalt is about 84%;
[0037] 6) Barium sulfide is added to the manganese ...
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