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Electrolytic manganese metal production from manganese carbonate precipitate
Electrolytic manganese metal production from manganese carbonate precipitate
- Source :
- Hydrometallurgy. 161:45-53
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The recovery of manganese metal from manganese carbonate precipitate by leaching–purification–electrowinning was studied. The manganese carbonate precipitate from Baja Mining Corp.'s El Boleo project was readily leached into acidic ammonium sulfate solution. The manganese extraction reached 99.7%. The manganese leachate was purified using ammonium sulfide to remove harmful impurities (Ni, Co, Cd, Cu and etc.). Manganese electrowinning was conducted in a diaphragm cell designed to eliminate edge effects and improve manganese deposition. The addition of polyacrylamide polymer had a significant leveling effect on manganese electrodeposition. However it increased the deposit internal stress and even resulted in cracking of manganese deposits at a high dosage. With increasing polyacrylamide polymer concentration, current density, and pH, the manganese current efficiency first increased, reached a maximum value and finally decreased. The manganese current efficiency decreased with increasing deposition time as the deposit became rougher and the real current density deviated from its ideal value. A reasonable catholyte circulation rate is important to maintain the optimum manganese electrodeposition. The presence of chloride in solution has a little effect on manganese deposition in its concentration range from 0 to 2 g/L. The diaphragm selection as an important part of the cell design was analyzed.
- Subjects :
- Ammonium sulfate
020209 energy
Inorganic chemistry
Polyacrylamide
Metals and Alloys
chemistry.chemical_element
02 engineering and technology
Manganese
Chloride
Industrial and Manufacturing Engineering
Ammonium sulfide
020501 mining & metallurgy
chemistry.chemical_compound
0205 materials engineering
chemistry
0202 electrical engineering, electronic engineering, information engineering
Materials Chemistry
medicine
Carbonate
Winkler test for dissolved oxygen
medicine.drug
Electrowinning
Subjects
Details
- ISSN :
- 0304386X
- Volume :
- 161
- Database :
- OpenAIRE
- Journal :
- Hydrometallurgy
- Accession number :
- edsair.doi...........0ae2365a768d5bedd48522969b5d6676
- Full Text :
- https://doi.org/10.1016/j.hydromet.2016.01.010