Phase equilibrium study of ZnO-"FeO"-SiO2 system at fixed Po2 10-8 atm

Liu, Hongquan, Cui, Zhixiang, Chen, Mao and Zhao, Baojun (2014). Phase equilibrium study of ZnO-"FeO"-SiO2 system at fixed Po2 10-8 atm. In: M. Akbar Rhamdhani and Geoffrey A. Brooks, 6th Annual High Temperature Processing Symposium 2014: Book of Papers and Abstracts. HTP 2014: 6th Annual High Temperature Processing Symposium 2014, Hawthorn, VIC, Australia, (117-124). 3-4 February, 2014.

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Author Liu, Hongquan
Cui, Zhixiang
Chen, Mao
Zhao, Baojun
Title of paper Phase equilibrium study of ZnO-"FeO"-SiO2 system at fixed Po2 10-8 atm
Formatted title
Phase equilibrium study of ZnO-"FeO"-SiO2 system at fixed Po2 10-8 atm
Conference name HTP 2014: 6th Annual High Temperature Processing Symposium 2014
Conference location Hawthorn, VIC, Australia
Conference dates 3-4 February, 2014
Proceedings title 6th Annual High Temperature Processing Symposium 2014: Book of Papers and Abstracts
Place of Publication Melbourne, VIC, Australia
Publisher High Temperature Processing Group, Faculty of Engineering, Science and Technology, Swinburne University of Technology
Publication Year 2014
Sub-type Fully published paper
Open Access Status
ISBN 9780987593023
Editor M. Akbar Rhamdhani
Geoffrey A. Brooks
Start page 117
End page 124
Total pages 8
Chapter number 31
Collection year 2015
Language eng
Formatted Abstract/Summary
Analysis of quenched copper smelting slag from the bottom blown furnace at Dongying Fangyuan Nonferrous Metals Co., Ltd. (Fangyuan) shows that significant ZnO is present in both liquid and spinel phases. Phase equilibria have been investigated in the system ZnO-Fe2O3-SiO2 in air and system ZnO-"FeO"-SiO2 in equilibrium with metallic iron. These conditions cannot represent copper smelting process in which oxygen partial pressure is around 10-8 atm. In the present study phase equilibria in the system ZnO-"FeO"-SiO2 have been carried out at Po2 10-8 atm. A series of experimental difficulties have been overcome to enable the ZnO-containing system to be investigated under reducing conditions controlled by CO-CO2 gas mixture. The experimental approach includes master slag preparation, high-temperature equilibration, quench and electron probe X-ray microanalysis (EPMA). Phase compositions in the quenched samples were measured by EPMA and used for construction of phase diagram. It was found that the isotherms of the system ZnO-"FeO"-SiO2 at Po2 10-8 atm are significantly different from those in air or in equilibrium with metallic iron. Presence of ZnO in copper smelting slag significantly increases the liquidus temperature in spinel primary phase field. The partitioning of ZnO in liquid and spinel is also reported in this paper .
Keyword Phase equilibrium
Copper smelting slag
ZnO-"FeO" -SiO2
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Conference Paper
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
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Created: Mon, 17 Mar 2014, 12:44:00 EST by Dr Baojun Zhao on behalf of School of Chemical Engineering