Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Article Full-text available Dec 2012 N. S. Randhawa R. K. Jana N. N. Das
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· Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Article Full-text available Dec 2012 Navneet Singh Randhawa Rodrigo Jaña
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Smelt ing studies showed that leached manganese nodules residue (WMNR) can be successfully utilized as raw material for silicomanganese production after maintaining
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· Manganese nodules from the sediment surface are mainly composed of phyllomanganates such as vernadite, birnessite, and buserite, whereas amounts of todorokite seem to be negligible. Phyllomanganates contain their metals either as substitutes of manganese in octahedral layers or as hydrated cations in the interlayers.
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Navneet Randhawa Among several under trial processes for extract ion of base metals (Cu, Co and Ni) from manganese nodules (MN), the reduction-roast ammoniacal leaching {NH4OH/(NH4)2CO3} process is considered very attractive.
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Leached sea nodules residue was used for the present study for exploring its utilization. The residue generated in ammoniacal-SO 2 pressure leaching was water washed to reduce the sulphur content. To improve the Mn/Fe ratio in the residue, it was
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In present paper, some of the thermodynamic and viscosity aspects of leached manganese nodules residue smelting for silicomanganese production are described.
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· Polymetallic nodules are promising resources for the extraction of valuable metals such as copper, nickel, and cobalt, as well as manganese alloys. To achieve efficient extraction of useful metals from the emerging resource, high-temperature carbothermic reduction of nodules was investigated by optimizing the reductant addition,
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Among several under trial processes for extract ion of base metals (Cu, Co and Ni) from manganese nodules (MN), the reduction-roast ammoniacal leaching {NH4OH/(NH4)2CO3} process is considered very attractive. After the leaching of base metals from
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· Diagrams illustrating BJH pore size distributions and cumulated surface areas for Green Bay FFN: (a) Mn-rich nodules, (b) Fe-Mn nodules, and (c) Fe-rich nodules. Pore size distribution (dS(d), m 2
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Article Full-text available Dec 2012 N. S. Randhawa R. K. Jana N. N. Das
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· Manganese nodules usually form at the water-sediment interface on the seafloor and grow via concentric accumulation of iron and manganese oxides around nuclei. Nodules are thought to form via three major processes including hydrogenesis, oxic diagenesis, and suboxic diagenesis (Halbach et al., 1981 ).
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Navneet Randhawa Among several under trial processes for extract ion of base metals (Cu, Co and Ni) from manganese nodules (MN), the reduction-roast ammoniacal leaching {NH4OH/(NH4)2CO3} process is considered very attractive.
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More than 200 samples of manganese nodules from the Central Indian Ocean Basin (CIOB) were studied for their different parameters. The study included various aspects such as morphology, texture, mineralogy, and
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Article Full-text available Dec 2012 N. S. Randhawa R. K. Jana N. N. Das
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The viscosity of slag is dependent on temperature and its composition, and influences different aspects in the FeMn production process, namely reduction kinetics and final MnO content of slag
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· Abstract. Sulfuric-acid leaching of deep-sea manganese nodules was carried out in an autoclave at controlled oxygen pressure and temperature. The results of this investigation indicate that by raising the temperature to 200°C and the oxygen pressure to 100 psig, it is possible to extract most of the Ni and Cu within a leaching time of one
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Navneet Randhawa Among several under trial processes for extract ion of base metals (Cu, Co and
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Navneet Randhawa Among several under trial processes for extract ion of base metals (Cu, Co and Ni) from manganese nodules (MN), the reduction-roast ammoniacal leaching {NH4OH/(NH4)2CO3} process is considered very attractive.
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· Manganese nodules containing Cu, Ni, Co, Mn and other valuable metals are abundant in different parts of World Ocean. • Mineralogical association of different metals determines the way nodules are treated to recover valuable metals. • Reduction of MnO 2 either by pyro- or hydrometallurgical routes facilitates recovery of metals.
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Manganese oxides also have a high adsorption capacity. 8Mn0 2, for example, has a surface area of about 260 m 2 g -1 and a pH zpc of 2.25 and can therefore adsorb cations such as Ni 2+, Cu 2+ and Zn 2+ from natural waters. By comparison, iron is the fourth most abundant element in the earth’s crust (av. cone. 5.17%) giving an average Mn/Fe
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The Manganese Nodule Belt of the Pacific Ocean geological environment, nodule formation, and mining aspects. Enke Verlag, Stuttgart, 254 pp. Google Scholar
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· With the increase of nodule volume, the pore anisotropy of the nodule caused uneven redox potential in the outer part of the nodule, which led to ring overlap in some directions. The increased
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Article Full-text available Dec 2012 N. S. Randhawa R. K. Jana N. N. Das
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Silicomanganese production utilising low grade manganese nodules leaching residue . × Close Log In Log in with Facebook Log in with Google or Email Password Remember me on this computer or reset password Enter the email address you signed up with
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This shows that the viscosity is not "sensitive" to the MnO content. Earlier paper by present authors [25] reported preparation of various charge mixes containing leached manganese nodules residue
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· However, the mechanism of oceanic manganese nodules bioleaching is not fully studied, and the prospect of technology development is uncertain. We have reviewed five influencing factors on bioleaching of oceanic manganese nodules: mineralogical characteristics, chemical reaction equilibrium, thermodynamic
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Navneet Randhawa Among several under trial processes for extract ion of base metals (Cu, Co and Ni) from manganese nodules (MN), the reduction-roast ammoniacal leaching {NH4OH/(NH4)2CO3} process is considered very attractive.
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· Phase Equilibria in the System Al2O3–MnO–SiO2: Thermodynamic and Application. January 2020. DOI: 10.1007/978-3-030-36540-0_17. In book: 11th International Symposium on High-Temperature
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Thermodynamics and Viscosity Aspects in Manganese Nodule Residue Smelting for Silicomanganese Production Article Full-text available Dec 2012 N. S. Randhawa R. K. Jana N. N. Das
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