Method for continuously preparing large-particle-size spherical cobalt carbonate
A technology of cobalt carbonate and large particle size, applied in the direction of cobalt carbonate, etc., can solve the problems of poor fluidity, small particle size, complicated operation, etc., and achieve the effect of good fluidity and uniform particles
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Embodiment 1
[0021] Prepare 3.5mol / L cobalt chloride solution, add 5g polyvinylpyrrolidone (PVP) and 60g / L ammonium bicarbonate solution to each liter of cobalt solution. Using pure water as the bottom liquid, add an excess of 27% mixed solution of ammonium bicarbonate, cobalt chloride and polyvinylpyrrolidone (PVP) into the reaction kettle in parallel. The process controls the pH value to 7.4, the temperature is 65°C, and the stirring speed is 900rpm. When it reaches the overflow port, it starts to feed continuously and output continuously. The reaction material is filtered by a centrifuge, washed, and dried to obtain a D50:26.65mm spherical cobalt carbonate product.
Embodiment 2
[0023] Prepare 0.8mol / L cobalt sulfate solution, add 0.8g cetyltrimethylammonium bromide (CTAB) and 170g / L ammonium carbonate solution to each liter of cobalt solution. Using pure water as the bottom liquid, add an excess of 15% mixed solution of ammonium bicarbonate, cobalt sulfate and cetyltrimethylammonium bromide (CTAB) into the reactor, the temperature is controlled at 30°C, and the pH value is controlled during the process 6.7, stirring speed 350rpm. When it reaches the overflow port, it starts to feed continuously and output continuously. The reaction material is filtered by a centrifuge, washed, and dried to obtain a D50:20.03mm spherical cobalt carbonate product.
Embodiment 3
[0025] Prepare 2.0mol / L cobalt sulfate solution, add 10g polyethylene glycol (PEG) and 240g / L ammonium bicarbonate solution to each liter of cobalt solution. Using pure water as the bottom liquid, add an excess of 20% ammonium bicarbonate, cobalt sulfate and polyethylene glycol (PEG) mixed solution into the reaction kettle in parallel, the temperature is controlled at 70°C, the process control pH value is 7.0, and the stirring speed is 650rpm. When it reaches the overflow port, it starts to feed continuously and output continuously. The reaction material is filtered by a centrifuge, washed, and dried to obtain a D50:17.45mm spherical cobalt carbonate product.
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