Purification of Cobalt, Nickel, and Titanium by Cold-Crucible Induction Melting in Ultrahigh Vacuum

Takaki, S.; Abiko, K.

doi:10.2320/matertrans.47.156

Cited by 4 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Takaki and Abiko [11] has reported that cold-crucible induction melting in an ultrahigh vacuum was effective to remove gaseous elements from Co. But another refining technique, H 2 -Ar plasma arc melting (which can deoxidize Co more rapidly) has been developed by Mimura et al [12] Thus, H 2 -Ar plasma arc melting was employed to remove oxygen.…”

Section: Introductionmentioning

confidence: 99%

Preparation of High-Purity Cobalt by Anion-Exchange Separation and Plasma Arc Melting

Uchikoshi

Shibuya

Imaizumi

et al. 2009

Metall Mater Trans B

View full text Add to dashboard Cite

MASAHITO UCHIKOSHI, HIDEKA SHIBUYA, JUNICHI IMAIZUMI, TAMÁ S KÉ KESI, KOUJI MIMURA, and MINORU ISSHIKI High-purity Co was prepared with valence-controlled anion-exchange separation, oxidation refining using plasma arc melting, and H 2 -Ar plasma arc melting on a pilot scale. The result of a laboratory-scale experiment indicated that the slower flow rate is more effective to remove the impurities by anion-exchange separation. However, the separation efficiency is reduced by scaling up the column from the laboratory to pilot scale. The discussion of the decrease in the separation efficiency implies that the distribution coefficient increases as the concentration of the adsorbate is lowered, but a reduced slower flow rate might increase the final purity of Co. In addition to anion-exchange separation, Co oxidation refining using plasma arc melting was useful. Consequently, a high-purity Co of 99.9998 pct by mass excluding gaseous elements was prepared, which represents the highest purity reported.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation of High-Purity Cobalt by Anion-Exchange Separation and Plasma Arc Melting

Uchikoshi

Shibuya

Imaizumi

et al. 2009

Metall Mater Trans B

View full text Add to dashboard Cite

show abstract

“…10 Treatment and purification of Ti─Al alloys, 11 iron, 12 cobalt, nickel, and titanium 13 as well as extraction of noble gases 14 and preparation of expansible graphite 15 have been well reported in the literatures. 10 Treatment and purification of Ti─Al alloys, 11 iron, 12 cobalt, nickel, and titanium 13 as well as extraction of noble gases 14 and preparation of expansible graphite 15 have been well reported in the literatures.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, the induction heating of synthesized MgFe 2 O 4 particles has been reported at inert atmosphere and frequency of 265 kHz, whereas the aim was not desulfurization. 10 Treatment and purification of Ti─Al alloys, 11 iron, 12 cobalt, nickel, and titanium 13 as well as extraction of noble gases 14 and preparation of expansible graphite 15 have been well reported in the literatures. Likewise, the desulfurization of carbon saturated iron has been investigated in induction furnace by sodium carbonate and sodium sulfate 16 ; however, the induction heating of coke breeze has not been reported because of its diamagnetic properties.…”

Section: Introductionmentioning

confidence: 99%

Optimization of operating conditions in desulfurization of petroleum coke using induction heating

Pourabdollah

Zakaria

Najafizadeh

2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

The matrix structure and properties of petcoke samples can be impressed by uniform and in situ thermal treatment. In this work, a novel hyphenated thermal approach was applied to investigate the ferromagnetic-based desulfurization of petcoke samples and the effect of controlling parameters. Induction heating furnace and capillary gas chromatography (CGC) were designed and assembled to study the thermal desulfurization of ferromagnetic petcoke, which was prepared by penetration of some metallic elements (e.g., Fe, Cr, and Ni) into the coke framework. Based upon a design of experiment algorithm, the petcoke matrix, the evolved gases and the residue coke breeze were monitored by energy-dispersive X-ray spectroscopy mapping, CGC, and electrical resistivity measurements. The results revealed that during petcoke formation, ferromagnetic metals were diffused and distributed throughout the coke matrix leading to the acceleration of the induction heating in the second stage of thermal treatment. Moreover, the evolved gas analysis showed the role and the rank of drainage rate, particle size, desulfurization temperature, induction frequency, and feed humidity parameters on the yield of desulfurization process. The effect of magnetic desulfurization on the specific electrical resistivity of coke breeze was identified as an industrial opportunity to be used in the cathodic protection systems. K E Y W O R D Sferromagnetic desulfurization, induction heating, electrical resistivity, EDX mapping

show abstract

“…Induction melting with cold copper crucible in vacuum can avoid contamination from refractory of crucibles and is also effective to remove the gaseous impurities in metal and alloys. A newly developed method for melting and controlled solidification of metals in the same vessel was outlined in our previous works [1]. However, the cost of IFCC (the induction furnace with cold crucible) is still very high due to its large heat loss and power consumption.…”

Section: Introductionmentioning

confidence: 99%

The Simulation of Thermal Field in Induction Melting with Cold-Crucible and Dual Frequencies

Lian

Wang

2008

MSF

View full text Add to dashboard Cite

A study of thermal field in induction melting with cold crucible and dual induction frequencies is presented in this paper. Numerical simulation was done by finite element based software COMSOL with use of multi-physical modeling. A method of superposing of magnetic vector potential is proposed to solve the complexity of dual induction frequencies. Different conditions of high and low frequencies were given in the calculation to find the effects on distribution of thermal fields. The computed temperature distribution was compared with the macro etched section of solidified ingots and the results showed that the orientation of dendritic grain structures follow to the similar direction of heat flow. This indicates that proper set of induction coils could enable more uniform thermal field distribution and attaining controlled solidification morphology in the ingots.

show abstract

Purification of Cobalt, Nickel, and Titanium by Cold-Crucible Induction Melting in Ultrahigh Vacuum

Cited by 4 publications

References 13 publications

Preparation of High-Purity Cobalt by Anion-Exchange Separation and Plasma Arc Melting

Preparation of High-Purity Cobalt by Anion-Exchange Separation and Plasma Arc Melting

Optimization of operating conditions in desulfurization of petroleum coke using induction heating

The Simulation of Thermal Field in Induction Melting with Cold-Crucible and Dual Frequencies

Contact Info

Product

Resources

About