Equilibrium between Na2O-containing slags and carbon-saturated iron at 1350 °C: The controlling oxygen potential

1992 ◽  
Vol 23 (3) ◽  
pp. 395-397 ◽  
Author(s):  
W. H. Van Niekerk ◽  
R. J. Dippenaar
Keyword(s):  
Oxygen Potential ◽  
Carbon Saturated Iron

scholarly journals Effect of the Fe2O3 Addition Amount on Dephosphorization of Hot Metal with Low Basicity Slag by High-Temperature Laboratorial Experiments

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 417
Author(s):  
Wenkui Yang ◽  
Jian Yang ◽  
Yanqiu Shi ◽  
Zhijun Yang ◽  
Fubin Gao ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Temperature ◽  
Theoretical Calculation ◽  
Oxygen Potential ◽  
Oxygen Activity ◽  
Hot Metal ◽  
Rich Phase ◽  
Addition Amount

In this paper, the influence of the Fe2O3 addition amount on the dephosphorization of hot metal at 1623 K with the slag of the low basicity (CaO/SiO2) of about 1.5 was investigated by using high-temperature laboratorial experiments. With increasing the Fe2O3 addition amount from 5 to 30 g, the contents of [C], [Si], [Mn] and [P] in the hot metal at the end of dephosphorization are decreased and the corresponding removal ratios increase. In dephosphorization slags, the phosphorus mainly exists in the form of the nCa2SiO4–Ca3(PO4)2 solid solution in the phosphorus-rich phase and the value of coefficient n decreases from 20 to 1. Furthermore, the oxygen potential and activity at the interface between the slag and hot metal are increased. When the oxygen potential and the oxygen activity at the interface are greater than 0.72 × 10−12 and 7.1 × 10−3, respectively, the dephosphorization ratio begins to increase rapidly. When the Fe2O3 addition amount is increased to 30 g, the ratio of the Fe2O3 addition amount to theoretical calculation consumption is around 175%, and the dephosphorization ratio reaches the highest value of 83.3%.

Porous YSZ as a surface oxygen potential probe on polarized electrodes

1994 ◽  
Vol 70-71 ◽  
pp. 65-71 ◽  
Author(s):  
T KAWADA ◽  
B VANHASSEL ◽  
T HORITA ◽  
N SAKAI ◽  
H YOKOKAWA ◽  
...  
Keyword(s):  
Oxygen Potential ◽  
Surface Oxygen

Time Evolution of Demixing in Oxides under an Oxygen Potential Gradient

1988 ◽  
Vol 71 (7) ◽  
pp. 513-521 ◽  
Author(s):  
TAKUMA ISHIKAWA ◽  
SHEIKH A. AKBAR ◽  
WEIGUANG ZHU ◽  
HIROSHI SATO
Keyword(s):  
Time Evolution ◽  
Oxygen Potential ◽  
Potential Gradient

scholarly journals Fundamental Investigation for Processing of Pb-Cu-S-Bearing Materials

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 74
Author(s):  
Christoph Zschiesche ◽  
Jürgen Antrekowitsch
Keyword(s):  
Oxygen Potential ◽  
Lead Concentration ◽  
Raw Materials ◽  
Research Work ◽  
Distribution Coefficients ◽  
Condensed Phases ◽  
Fundamental Investigation ◽  
Bearing Materials ◽  
The Right ◽  
The Impact

The processing of polymetallic materials provides some challenges to every flowsheet. Within Aurubis Cu-Pb-metallurgical flowsheet, a broad range of raw materials and intermediates are processed. Continuous improvements are required to adapt the flowsheet according to the changing material quantity and quality. Therefore, thermodynamic modeling is the desired and most efficient way to conduct scenario analysis. Hence, databases and software are becoming better and better as the acceptance of this method increased. Further understanding is promoted by conducting experimental test work to validate the calculated results. In this research work, the impact of various oxygen potential on the formation of the condensed phases’ slag, matte, speiss and crude lead were investigated. A frequent check of slag metallurgy, in particular, the iron and lead concentration, provide feedback if the metallurgical process is operating at the right oxygen potential. Following, the calculated distribution coefficients for Cu, Pb, As, Sb, Sn and Ni between matte/speiss and speiss/lead are discussed.

scholarly journals Kinetics of the reaction of SiO(g) with carbon saturated iron

1985 ◽  
Vol 16 (4) ◽  
pp. 857-857
Author(s):  
B. Ozturk ◽  
R. J. Fruehan
Keyword(s):  
Kinetics Of ◽  
Carbon Saturated Iron
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