Chloride capacity in FeO-Fe2O3-SiO2 molten slag at 1523 K

Yu Yamashita; Akio Fuwa; Fumito Tanaka

Chloride capacity in FeO-Fe₂O₃-SiO₂ molten slag at 1523 K

Yu Yamashita^*, Akio Fuwa, Fumito Tanaka

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

There have been increasing in melting recycled scraps in copper smelting processes, and thus growing interests in the chlorine behavior. In this study, chloride dissolution in FeO-Fe₂O₃-SiO₂ slag (SiO₂ sat.) at 1523 K has been measured with varying in P _Cl2 from 1.13×10^-8 to 1.30×10^-7 atm. and the oxygen partial pressures encountered in typical copper smelting furnace, i.e. P_o2=10^-8 to 10^-10 atm. Discussion is made on the chloride capacity of FeO-Fe₂O₃-SiO ₂ slag in terms of its characteristics and the dissolved chlorine species. It has been shown that the most reasonable dissolution reaction and chloride capacity can be expressed by the following reactions, where chlorine dissolves in the form of Cl^-; here, a_o2-, oxygen ion activity, is shown a function of oxygen partial pressure in the atmosphere. 1/2 Cl₂ (g) + 1/2 O^2- (slag) = Cl^- (slag) + 1/4 O₂(g) (1) C_cl- = (mass%Cl^-)P_O2 ^1/4/P_Cl2 ^1/2 = K₁a_O2- ^1/2/f_Cl- (2).

Original language	English
Title of host publication	2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
Pages	503-513
Number of pages	11
Volume	1
Publication status	Published - 2006
Event	2006 TMS Fall Extraction and Processing Division: Sohn International Symposium - San Diego, CA Duration: 2006 Aug 27 → 2006 Aug 31

Other

Other	2006 TMS Fall Extraction and Processing Division: Sohn International Symposium
City	San Diego, CA
Period	06/8/27 → 06/8/31

Keywords

Chloride capacity
Copper smelting
FeO-FeO-SiO slag
Gas-slag equilibrium
Scrap smelting

ASJC Scopus subject areas

Engineering(all)

Cite this

@inproceedings{ef19b335f5ad49be99f1cb4d1fb7caa1,

title = "Chloride capacity in FeO-Fe2O3-SiO2 molten slag at 1523 K",

abstract = "There have been increasing in melting recycled scraps in copper smelting processes, and thus growing interests in the chlorine behavior. In this study, chloride dissolution in FeO-Fe2O3-SiO2 slag (SiO2 sat.) at 1523 K has been measured with varying in P Cl2 from 1.13×10-8 to 1.30×10-7 atm. and the oxygen partial pressures encountered in typical copper smelting furnace, i.e. Po2=10-8 to 10-10 atm. Discussion is made on the chloride capacity of FeO-Fe2O3-SiO 2 slag in terms of its characteristics and the dissolved chlorine species. It has been shown that the most reasonable dissolution reaction and chloride capacity can be expressed by the following reactions, where chlorine dissolves in the form of Cl-; here, ao2-, oxygen ion activity, is shown a function of oxygen partial pressure in the atmosphere. 1/2 Cl2 (g) + 1/2 O2- (slag) = Cl- (slag) + 1/4 O2(g) (1) Ccl- = (mass%Cl-)PO2 1/4/PCl2 1/2 = K1aO2- 1/2/fCl- (2).",

keywords = "Chloride capacity, Copper smelting, FeO-FeO-SiO slag, Gas-slag equilibrium, Scrap smelting",

author = "Yu Yamashita and Akio Fuwa and Fumito Tanaka",

year = "2006",

language = "English",

isbn = "0873396332",

volume = "1",

pages = "503--513",

booktitle = "2006 TMS Fall Extraction and Processing Division: Sohn International Symposium",

note = "2006 TMS Fall Extraction and Processing Division: Sohn International Symposium ; Conference date: 27-08-2006 Through 31-08-2006",

}

TY - GEN

T1 - Chloride capacity in FeO-Fe2O3-SiO2 molten slag at 1523 K

AU - Yamashita, Yu

AU - Fuwa, Akio

AU - Tanaka, Fumito

PY - 2006

Y1 - 2006

N2 - There have been increasing in melting recycled scraps in copper smelting processes, and thus growing interests in the chlorine behavior. In this study, chloride dissolution in FeO-Fe2O3-SiO2 slag (SiO2 sat.) at 1523 K has been measured with varying in P Cl2 from 1.13×10-8 to 1.30×10-7 atm. and the oxygen partial pressures encountered in typical copper smelting furnace, i.e. Po2=10-8 to 10-10 atm. Discussion is made on the chloride capacity of FeO-Fe2O3-SiO 2 slag in terms of its characteristics and the dissolved chlorine species. It has been shown that the most reasonable dissolution reaction and chloride capacity can be expressed by the following reactions, where chlorine dissolves in the form of Cl-; here, ao2-, oxygen ion activity, is shown a function of oxygen partial pressure in the atmosphere. 1/2 Cl2 (g) + 1/2 O2- (slag) = Cl- (slag) + 1/4 O2(g) (1) Ccl- = (mass%Cl-)PO2 1/4/PCl2 1/2 = K1aO2- 1/2/fCl- (2).

AB - There have been increasing in melting recycled scraps in copper smelting processes, and thus growing interests in the chlorine behavior. In this study, chloride dissolution in FeO-Fe2O3-SiO2 slag (SiO2 sat.) at 1523 K has been measured with varying in P Cl2 from 1.13×10-8 to 1.30×10-7 atm. and the oxygen partial pressures encountered in typical copper smelting furnace, i.e. Po2=10-8 to 10-10 atm. Discussion is made on the chloride capacity of FeO-Fe2O3-SiO 2 slag in terms of its characteristics and the dissolved chlorine species. It has been shown that the most reasonable dissolution reaction and chloride capacity can be expressed by the following reactions, where chlorine dissolves in the form of Cl-; here, ao2-, oxygen ion activity, is shown a function of oxygen partial pressure in the atmosphere. 1/2 Cl2 (g) + 1/2 O2- (slag) = Cl- (slag) + 1/4 O2(g) (1) Ccl- = (mass%Cl-)PO2 1/4/PCl2 1/2 = K1aO2- 1/2/fCl- (2).

KW - Chloride capacity

KW - Copper smelting

KW - FeO-FeO-SiO slag

KW - Gas-slag equilibrium

KW - Scrap smelting

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M3 - Conference contribution

AN - SCOPUS:33846042724

SN - 0873396332

SN - 9780873396332

VL - 1

SP - 503

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BT - 2006 TMS Fall Extraction and Processing Division: Sohn International Symposium

T2 - 2006 TMS Fall Extraction and Processing Division: Sohn International Symposium

Y2 - 27 August 2006 through 31 August 2006

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