Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags
The viscosity and conductivity of the smelting slag of copper oxide concentrate are important for reducing the operating temperature. In this study, seven slag samples were prepared by the reductive smelting of copper oxide concentrate with different ferrous oxide contents. The viscosity and conduct...
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MDPI AG
2023-04-01
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| author | Lei Zhang Kaixi Jiang Feng Xie Diankun Lu |
| author_facet | Lei Zhang Kaixi Jiang Feng Xie Diankun Lu |
| author_sort | Lei Zhang |
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| description | The viscosity and conductivity of the smelting slag of copper oxide concentrate are important for reducing the operating temperature. In this study, seven slag samples were prepared by the reductive smelting of copper oxide concentrate with different ferrous oxide contents. The viscosity and conductivity data of these CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> samples were measured in the temperature range of 1290~1410 °C. Based on the structural features of aluminosilicate melts, the change and dependency relationships of their viscosity and conductivity were analyzed. The results show that there is a strong tendency to form orthosilicate even when the slag composition is acidic. The formation of fayalite would allow more Al<sup>3+</sup> to form pyroxene with the six-coordinated structure. As a result, the polymerization degree and viscosity of the melt will be reduced. The <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mrow><mo>[</mo><mrow><mi>AlO</mi></mrow><mo>]</mo></mrow></mrow><mn>4</mn><mrow><mn>5</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula> as a network former will reduce the bonding strength of the structural units, thus reducing the slag viscosity at high temperature. In the experimental range, the logarithm of viscosity of each slag sample has a good linear relationship with its logarithm of conductivity. However, there is no uniform linear equation for these complex slags with wide composition variations. These results have potential guiding significance for the copper smelting process. |
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| spelling | doaj.art-312e017d959a4fc797985a3676497bd12023-11-17T20:27:41ZengMDPI AGMetals2075-47012023-04-0113478610.3390/met13040786Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting SlagsLei Zhang0Kaixi Jiang1Feng Xie2Diankun Lu3School of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaSchool of Metallurgy, Northeastern University, Shenyang 110819, ChinaThe viscosity and conductivity of the smelting slag of copper oxide concentrate are important for reducing the operating temperature. In this study, seven slag samples were prepared by the reductive smelting of copper oxide concentrate with different ferrous oxide contents. The viscosity and conductivity data of these CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> samples were measured in the temperature range of 1290~1410 °C. Based on the structural features of aluminosilicate melts, the change and dependency relationships of their viscosity and conductivity were analyzed. The results show that there is a strong tendency to form orthosilicate even when the slag composition is acidic. The formation of fayalite would allow more Al<sup>3+</sup> to form pyroxene with the six-coordinated structure. As a result, the polymerization degree and viscosity of the melt will be reduced. The <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msubsup><mrow><mrow><mo>[</mo><mrow><mi>AlO</mi></mrow><mo>]</mo></mrow></mrow><mn>4</mn><mrow><mn>5</mn><mo>−</mo></mrow></msubsup></mrow></semantics></math></inline-formula> as a network former will reduce the bonding strength of the structural units, thus reducing the slag viscosity at high temperature. In the experimental range, the logarithm of viscosity of each slag sample has a good linear relationship with its logarithm of conductivity. However, there is no uniform linear equation for these complex slags with wide composition variations. These results have potential guiding significance for the copper smelting process.https://www.mdpi.com/2075-4701/13/4/786copper smelting slagaluminum oxideviscosityconductivitystructural unit |
| spellingShingle | Lei Zhang Kaixi Jiang Feng Xie Diankun Lu Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags Metals copper smelting slag aluminum oxide viscosity conductivity structural unit |
| title | Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags |
| title_full | Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags |
| title_fullStr | Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags |
| title_full_unstemmed | Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags |
| title_short | Relation between Viscosity and Conductivity of CaO-MgO-FeO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> System for Copper Smelting Slags |
| title_sort | relation between viscosity and conductivity of cao mgo feo al sub 2 sub o sub 3 sub sio sub 2 sub system for copper smelting slags |
| topic | copper smelting slag aluminum oxide viscosity conductivity structural unit |
| url | https://www.mdpi.com/2075-4701/13/4/786 |
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