The formation of CaSO4 in the CaO-FeOx-Cu2O slags at 1250°C under high partial pressure of SO2

Katsunori Yamaguchi, Shigeru Ueda, Akira Yazawa

研究成果: Conference contribution

抄録

Continuous converting of copper matte based on calcium ferrite slag of the CaO-FeOx-Cu2O system is an attractive technology for copper smelting. This slag containing approximately 20 mass% CaO can prevent the excess magnetite precipitation, but sometimes tends to separate CaSO4 under a high oxygen potential required to produce copper metal. To clarify the mechanism of gypsum formation, the precipitation of CaSO4 in the CaO-FeOx-Cu2O slag system equilibrating with blister copper has been determined at 1250°C under the SO2 partial pressures of 0.2, 0.6 and 1 atm. It was found that the formation of CaSO4 in the CaO-FeOx-Cu2O slags is enhanced with increasing SO2 partial pressure or CaO content and also increasing oxidation degree of the blister copper. The behavior of CaSO4 formation in the slag is also discussed thermodynamically based on the free energy calculations combining with the activity data derived from Takeda's data on the CaO-FeOx-Cu2O ferrite slag diagram. Both of experimental and thermodynamical results show good agreements in general.

本文言語English
ホスト出版物のタイトルProceedings - European Metallurgical Conference, EMC 2007
ページ227-237
ページ数11
出版ステータスPublished - 2007 12 1
外部発表はい
イベント4th European Metallurgical Conference, EMC 2007 - Dusseldorf, Germany
継続期間: 2007 6 112007 6 14

出版物シリーズ

名前Proceedings - European Metallurgical Conference, EMC 2007
1

Conference

Conference4th European Metallurgical Conference, EMC 2007
CountryGermany
CityDusseldorf
Period07/6/1107/6/14

ASJC Scopus subject areas

  • Metals and Alloys

フィンガープリント 「The formation of CaSO<sub>4</sub> in the CaO-FeOx-Cu<sub>2</sub>O slags at 1250°C under high partial pressure of SO<sub>2</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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