Sulphide Capacity and Sulphur Solubility in CaO-Al2O3 and CaO-Al2O3-CaF2 Slags

Ban-Ya, Shiro; Hobo, Makoto; Kaji, Tetsuro; Itoh, Takeshi; Hino, Mitsutaka

doi:10.2355/isijinternational.44.1810

Cited by 58 publications

(42 citation statements)

References 11 publications

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“…-S melt in the present study are in excellent agreement with those data determined by different experimental techniques. 11,12) This also confirms that thermodynamics of sulfur in Fe-C sat. -S melt used in the present study is valid.…”

Section: Sulfide Capacity Of Cao-al 2 O 3 Slagsupporting

confidence: 77%

“…11,12) Banya et al 11) determined the sulfide capacity of CaO-Al 2 O 3 slag by the gas-slag equilibration technique using a CO-CO 2 -SO 2 -Ar gas mixture under the oxygen partial pressures controlled by CO 2 -CO gas mixture at 1 873 K. They kept sulfur content in slag below 0.8 mass% in order to avoid CaS formation which could significantly affect the sulfide capacity of the slag. Ozturk and Turkdogan 12) determined the sulfide capacity of CaS saturated CaO-Al 2 O 3 slag from the equilibrium sulfur distribution between Fe-S-Al-O melts and the slag in contact with pure solid CaS under Ar atmosphere at 1 873 K, assuming that the oxygen partial pressure was controlled by Al-O deoxidation equilibrium in liquid iron.…”

Section: Sulfide Capacity Of Cao-al 2 O 3 Slagmentioning

confidence: 99%

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Thermodynamics of Sulfur in Carbon Saturated Liquid Ferro-alloys Containing Ni, Mo and V at 1873 K

et al. 2018

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The spent catalysts discarded from the petroleum refinery operations contain a substantial amount of valued metals such as Ni, Mo and V together with high sulfur content. Recently, the smelting reduction process of this resource using the carbothermic reaction is being developed and commercialized to recover these metals in the form of carbon saturated ferro-alloys containing Ni, Mo and V. Sulfur can be picked up into alloy melts from the sulfur bearing spent catalysts during the smelting process. Therefore, thermodynamics of sulfur in these alloy melts is very important for producing low sulfur ferro-alloys. In the present study, thermodynamic interactions between those alloying elements and sulfur in liquid iron was studied using the slag/metal equilibration technique at 1 873 K. The equilibrium sulfur distribution was measured between a slag with a known sulfide capacity and carbon saturated liquid Fe-V-Ni-Mo alloys of various compositions. The carbon solubility in liquid alloy was significantly changed with alloy composition. The specific effects of V, Ni and Mo on sulfur was determined by considering the effect of carbon on sulfur using Wagner's formalism as the first-and second-order interaction parameters as well as the second-order cross-product terms.

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Section: Sulfide Capacity Of Cao-al 2 O 3 Slagsupporting

confidence: 77%

Section: Sulfide Capacity Of Cao-al 2 O 3 Slagmentioning

confidence: 99%

Thermodynamics of Sulfur in Carbon Saturated Liquid Ferro-alloys Containing Ni, Mo and V at 1873 K

et al. 2018

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“…But Ban-ya 9,10) and Ban-ya et al 11) commented on the paper by C. Wagner,5) and it was emphasized that the sulfide capacity is unable to be applied as a measure of the basicity index of the slag.…”

mentioning

confidence: 99%

“…However, the relation of the equilibrium constant and activity coefficient is not so simple in multicomponents solution like molten slag, flux and salt. As the more simple case, Ban-ya et al 11) showed the treatment of Fe-Ni-H system as follows.…”

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confidence: 99%