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Effect of Basicity on Viscosity Characteristics of High-Temperature Melting Slags of Bayan Obo Niobium Concentrate
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Jintao LI1, 2, Zhongshuai JIA3, 4, Bo ZHANG1, 2, Chengjun LIU1, 2, Maofa JIANG1, 2
Mining and Metallurgical Engineering | 2025, 45(6) : 114 - 118
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Mining and Metallurgical Engineering | 2025, 45(6): 114-118
• METALLURGY •
Effect of Basicity on Viscosity Characteristics of High-Temperature Melting Slags of Bayan Obo Niobium Concentrate
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Jintao LI1, 2, Zhongshuai JIA3, 4, Bo ZHANG1, 2, Chengjun LIU1, 2, Maofa JIANG1, 2
Affiliations
  • 1.Key Laboratory of Ecological Metallurgy of Multimetallic Ores of Ministry of Education, Northeastern University, Shenyang 110819, Liaoning, China
  • 2.School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
  • 3.Baosteel Group Mine Research Institute (Co., Ltd.), Baotou 014030, Inner Mongolia, China
  • 4.Inner Mongolia Key Laboratory of Green and Comprehensive Utilization of Mining and Metallurgical Solid Waste Resources, Baotou 014030, Inner Mongolia, China
doi: 10.3969/j.issn.0253-6099.2025.06.020
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Slags produced after reduction smelting of Bayan Obo niobium concentrate were taken for research, and laws of influence for basicity on slag viscosity, turning point temperature and viscous-flow activation energy were explored by testing viscosity characteristics of high-temperature smelting slags. Samples taken at the turning point temperature and as the viscosity reaching 8 Pa·s were quenched respectively, and then taken for observing crystalline phases. It is found that the basicity of the slags exerts a significant effect on its high-temperature viscosity characteristics. An increase in temperature leads to a decrease in viscosity, while as basicity increases, the viscosity initially decreases and then increases. Specifically, at a basicity of 1.0, the viscosity attains the minimum value of 0.2 Pa·s at 1 500 ℃; while at 2.0, the viscosity increases remarkably. Both the turning point temperature and viscous flow activation energy at a basicity of 1.0 reach their minimum values, 1 325 ℃ and 243.61 kJ/mol. At different basicity, slags initially have different crystalline phases. At a basicity of 0.5, calcium silicate is the main precipitated phase; at 1.0, perovskite and titanite are precipitated; while at 1.5 and 2.0, perovskite is the dominant precipitated phase.

Bayan Obo ore  /  niobium  /  basicity  /  viscosity  /  crystallization  /  smelting slags  /  turning point temperature
李锦涛, 贾中帅, 张波, 刘承军, 姜茂发. 碱度对白云鄂博铌精矿高温熔炼渣系黏性特征的影响研究. 矿冶工程杂志, 2025 , 45 (6) : 114 -118 . DOI: 10.3969/j.issn.0253-6099.2025.06.020
Jintao LI, Zhongshuai JIA, Bo ZHANG, Chengjun LIU, Maofa JIANG. Effect of Basicity on Viscosity Characteristics of High-Temperature Melting Slags of Bayan Obo Niobium Concentrate[J]. Mining and Metallurgical Engineering, 2025 , 45 (6) : 114 -118 . DOI: 10.3969/j.issn.0253-6099.2025.06.020
Appendix
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Year 2025 volume 45 Issue 6
96
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Article Info
doi: 10.3969/j.issn.0253-6099.2025.06.020
  • Receive Date：2025-05-11
  • Online Date：2026-10-08
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  • Received：2025-05-11
Funding
Affiliations
    1.Key Laboratory of Ecological Metallurgy of Multimetallic Ores of Ministry of Education, Northeastern University, Shenyang 110819, Liaoning, China
    2.School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
    3.Baosteel Group Mine Research Institute (Co., Ltd.), Baotou 014030, Inner Mongolia, China
    4.Inner Mongolia Key Laboratory of Green and Comprehensive Utilization of Mining and Metallurgical Solid Waste Resources, Baotou 014030, 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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