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| Effect of basicity and Al2O3 on viscosity of ferronickel smelting slag |
| Yong-feng Chen1, Xue-ming Lv2, Zheng-de Pang3,4, Xue-wei Lv3,4 |
| 1 Wuhu Xinxing Ductile Iron Pipes Co., Ltd., Wuhu 241000, Anhui, China; 2 Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China; 3 Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400044, China; 4 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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Abstract The effect of the Al2O3 content and basicity (the molar ratio of MgO to SiO2) on the viscosity of a SiO2–MgO–FeO– Al2O3–CaO slag was studied to fully understand the smelting process of the ferronickel alloy. Experimental results show that the slag is a mixture of liquid and solid phases at the experimental temperature. The viscosity decreased as the basicity increased and increased as the Al2O3 content increased. To determine the effect of the Al2O3 content and basicity on the structure of the molten slag, Raman spectroscopy was performed on the slag sample, which was quenched from the high temperature with water. The Raman spectra showed that the fractions of the polymerization structural units decreased significantly as the basicity of the slag increased, resulting in a decrease in the apparent viscosity. However, Al2O3 acts as a network former in the slag system, thereby making the slag structure further polymerized and increasing the viscosity.
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| Cite this article: |
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Yong-feng Chen,Xue-ming Lv,Zheng-de Pang, et al. Effect of basicity and Al2O3 on viscosity of ferronickel smelting slag[J]. Journal of Iron and Steel Research International, 2020, 27(12): 1400-1406.
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2020, Vol. 27 
