A Study of Porous Slag with Plasma Arc Melting

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.45.2224 ◽

2006 ◽

Vol 45 ◽

pp. 2224-2228

Author(s):

Shuang Shii Lian ◽

Chih Kang Chang ◽

Chin Ching Tzeng

Keyword(s):

Pore Formation ◽

Plasma Arc ◽

Laboratory Plasma ◽

Arc Melting ◽

The Future ◽

Foam Slag ◽

Plasma Melting ◽

Arc Heating

The slag from steel plants or incinerators was tried to be recycled and be reused as foam materials through plasma arc melting. The study was intended to investigate the making of foam slag with laboratory plasma melting facilities. The investigated materials consisted of different mixtures of Al2O3、SiO2 、FetO、CaO and Na2O, with the fluxes that were necessary to examine the capability of pore-formation in the solidified ingots. It has been found that the foam slag could be obtained with the proper compositions and conditions of arc heating. The dimensions and distributions of pores were studied and correlated with the temperatures and compositions of slag. The results showed that the sizes of pores inside the solidified ingots were in the range of 1~5 mm, and the thickness of slag was around 20 mm. As to the distributions of the pores in the ingots of slag, further improvement would be needed in the future.

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Separation of titanium and silicon oxides during plasma-arc melting of quartz-leucoxene concentrate

Physics and Chemistry of Materials Treatment ◽

10.30791/0015-3214-2021-5-30-36 ◽

2021 ◽

Vol 5 ◽

pp. 30-36

Author(s):

A. A. Nikolaev ◽

◽

Keyword(s):

Lower Layer ◽

Energy Requirement ◽

Graphite Crucible ◽

Arc Furnace ◽

Plasma Arc ◽

Laboratory Plasma ◽

Silicon Oxides ◽

Arc Melting ◽

Melting Separation ◽

Oxide Particles

The aim of the work was investigation of separation of titanium’s and silicon’s oxides during plasma-arc melting of quartz-leucoxene concentrate from Yarega deposit. The melting was proceeded in laboratory plasma-arc furnace in graphite crucible at 16 – 40 kW of arc power. The microstructure and R-x phase analysis of solidified melt were investigated after arc melting. The melt separated on two layers. The upper layer consisted mainly of SiO2 in the form of glass, the lower layer — mainly of cemented titanium oxide particles ≈ 100 μm in dimension. TiO2, Ti8O15, Ti6O11, Fe3TiO3O10, Ti3O5 were observed. These particles formed during melting and moved throw liquid glass to the bottom of crucible with the speed of V ≈ 10–4 m/s. The separation of TiO2 and SiO2 required energy W ≈ 100 GJ/t of concentrate in laboratory plasma arc furnace. The possibility of industrial employment of the arc melting separation was discussed. The estimated energy requirement was about 5 GJ/t in 20-t arc furnace.

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Preparation and characteristics of Ba1-xKxBiO3superconductors using the plasma-arc melting and rapid quenching method

Phase Transitions ◽

10.1080/01411599308207775 ◽

1993 ◽

Vol 41 (1-4) ◽

pp. 175-178 ◽

Cited By ~ 1

Author(s):

M. Kamino ◽

M. Iyori ◽

H. Suzuki ◽

K. Takahashi ◽

Y. Yoshisato ◽

...

Keyword(s):

Rapid Quenching ◽

Plasma Arc ◽

Arc Melting ◽

Quenching Method

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Refining effect of hydrogen plasma arc melting on hafnium metal

Materials Letters ◽

10.1016/j.matlet.2006.01.061 ◽

2006 ◽

Vol 60 (21-22) ◽

pp. 2604-2605 ◽

Cited By ~ 8

Author(s):

Joon Woo Bae ◽

Jae-Won Lim ◽

Kouji Mimura ◽

Minoru Isshiki

Keyword(s):

Hydrogen Plasma ◽

Plasma Arc ◽

Refining Effect ◽

Arc Melting

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Hydrogen effect on refining of Mo metal by Ar–H2 plasma arc melting

Materials Letters ◽

10.1016/j.matlet.2010.07.067 ◽

2010 ◽

Vol 64 (21) ◽

pp. 2290-2292 ◽

Cited By ~ 17

Author(s):

Jae-Won Lim ◽

Kouji Mimura ◽

Dai Miyawaki ◽

Jung-Min Oh ◽

Good-Sun Choi ◽

...

Keyword(s):

Hydrogen Effect ◽

Plasma Arc ◽

Arc Melting

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Production of Pure Tantalum by Carbon-Reduction Smelting and Hydrogen Plasma-Arc Melting with Refining

Materials Transactions JIM ◽

10.2320/matertrans1989.31.293 ◽

1990 ◽

Vol 31 (4) ◽

pp. 293-301 ◽

Cited By ~ 18

Author(s):

Kouji Mimura ◽

Michio Nanjo

Keyword(s):

Hydrogen Plasma ◽

Plasma Arc ◽

Carbon Reduction ◽

Arc Melting ◽

Reduction Smelting ◽

Pure Tantalum

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Preparation of High Tc Superconductors by a Plasma-Arc Melting and Rapid Quenching Method

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj.99.699 ◽

1991 ◽

Vol 99 (1152) ◽

pp. 699-703 ◽

Cited By ~ 1

Author(s):

Maruo KAMINO ◽

Kazuhiko TAKAHASHI ◽

Yorinobu YOSHISATO ◽

Shoichi NAKANO

Keyword(s):

Rapid Quenching ◽

Plasma Arc ◽

High Tc Superconductors ◽

High Tc ◽

Arc Melting ◽

Quenching Method

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Plasma Electrolytic Oxidation on Ti–xNb–2Ag–2Pt Alloys for Nano- and Micro-Pore Formation in Electrolyte with Ca and P Ions for Dental Implant Use

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19163 ◽

2021 ◽

Vol 21 (7) ◽

pp. 3753-3758

Author(s):

Hyun-Jun Kim ◽

Han-Cheol Choe

Keyword(s):

Dental Implant ◽

Plasma Electrolytic Oxidation ◽

Pore Formation ◽

Melting Furnace ◽

Vacuum Arc ◽

X Ray ◽

Arc Melting ◽

Electrolytic Oxidation ◽

Nb Content ◽

Plasma Electrolytic

In this study, plasma electrolytic oxidation (PEO) on Ti–xNb–2Ag–2Pt alloys for nano- and micro-pore formation in electrolyte with Ca and P ions for dental implant use was studied using various experimental equipment. The Ti–xNb–2Ag–2Pt alloys were fabricated using a vacuum arc melting furnace, and micro-pores were created through PEO-treatment in an electrolyte containing Ca and P ions. The PEO-treated surface was observed by X-ray diffractometer (XRD), field-emission scanning electron microscopy, and energy dispersive X-ray spectroscopy (EDS). The microstructure of Ti– xNb–2Ag–2Pt alloys showed the transformation of needle-like structure to equiaxed structure, as Nb content increased. Adding small amounts of Ag and Pt to Ti–xNb alloys, microstructure was not observed the significantly difference compared to Ti–xNb. The nano- and micro-pore sizes increased as the Nb content increased after PEO-treatment of Ti-xNb. In the case of Ti–50Nb–2Ag–2Pt, groove structure was observed, also the Ca/P ratio increased as the Nb content increased. The oxide layer thickness of Ti–xNb–2Ag–2Pt alloys was increased, as the Nb content increased.

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