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Effect of Binary Basicity on Viscosity and Structure of CaO-SiO2-Al2O3-CeO2-La2O3 Slag
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Fuheng ZHAO1, 2, Wenbin XIN1, 2, Yongchun DENG1, 2, Jing ZHANG1, 2, Yinju JIANG1, 2, Zuojun CAO1, 2, Liyong WANG1, 2
Mining and Metallurgical Engineering | 2025, 45(1) : 92 - 96
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Mining and Metallurgical Engineering | 2025, 45(1): 92-96
• METALLURGY •
Effect of Binary Basicity on Viscosity and Structure of CaO-SiO2-Al2O3-CeO2-La2O3 Slag
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Fuheng ZHAO1, 2, Wenbin XIN1, 2, Yongchun DENG1, 2, Jing ZHANG1, 2, Yinju JIANG1, 2, Zuojun CAO1, 2, Liyong WANG1, 2
Affiliations
  • 1.School of Rare Earth Industry (School of Rare Earth Engineering and Technology), Inner Mongolia University of Science and Technology, Baotou, 014010, Inner Mongolia, China
  • 2.Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources of Ministry of Education, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
Published: 2025-02-01 doi: 10.3969/j.issn.0253-6099.2025.01.017
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To reasonably select the composition of molten slag for efficient enrichment of rare earth elements therein, the viscosity and melt structure of mixed rare earth slag under different binary basicity conditions were explored using rotating cylinder method, FTIR, Raman spectroscopy, and X-ray photoelectronic spectroscopy. The results show that with the binary basicity of 0.50, 0.86, 1.00, and 1.20 respectively, the corresponding viscosity of the slag system at 1 550 ℃ is 1.30, 0.87, 0.60, and 0.36 Pa·s, and the activation energy of the viscous flow unit is 268, 220, 216, 202 kJ respectively; the area fractions of Q1 (Si) and Q2 (Si) in the molten slag are all more than 24%. As the binary basicity increases, the area fraction of bridging oxygen (O0) decreases, and the area fractions of non-bridging oxygen (O-) and free oxygen (O2-) decrease, and the K value representing the polymerization degree of slag gradually decreases from 0.53 to 0.10. It is found that the structure system of molten slag tends to be simple with the increase of binary basicity, which is the main reason for decrease in the viscosity of a mixed rare earth slag.

rare earth slag  /  basicity  /  viscosity  /  molten slag structure  /  rare earth  /  crystalline phase  /  slag system
Fuheng ZHAO, Wenbin XIN, Yongchun DENG, Jing ZHANG, Yinju JIANG, Zuojun CAO, Liyong WANG. Effect of Binary Basicity on Viscosity and Structure of CaO-SiO2-Al2O3-CeO2-La2O3 Slag[J]. Mining and Metallurgical Engineering, 2025 , 45 (1) : 92 -96 . DOI: 10.3969/j.issn.0253-6099.2025.01.017
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Year 2025 volume 45 Issue 1
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doi: 10.3969/j.issn.0253-6099.2025.01.017
  • Receive Date：2024-09-11
  • Online Date：2026-03-17
  • Published：2025-02-01
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  • Received：2024-09-11
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Affiliations
    1.School of Rare Earth Industry (School of Rare Earth Engineering and Technology), Inner Mongolia University of Science and Technology, Baotou, 014010, Inner Mongolia, China
    2.Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources of Ministry of Education, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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