Effect of MgO/Al<sub>2</sub>O<sub>3</sub> Mass Ratio on Mineralization Behavior of Limonitic Laterite Ore During Sintering

HOU Sanya; HUANG Jiahao; Zhang Dou; CHEN Jing; HU Qiansheng; LUO Jun; RAO Mingjun

doi:10.13779/j.cnki.issn1001-0076.2023.01.015

2023 Vol. 43, No. 1

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(1): 140-147

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HOU Sanya, HUANG Jiahao, Zhang Dou, CHEN Jing, HU Qiansheng, LUO Jun, RAO Mingjun. Effect of MgO/Al2O3 Mass Ratio on Mineralization Behavior of Limonitic Laterite Ore During Sintering[J]. Conservation and Utilization of Mineral Resources, 2023, 43(1): 140-147. doi: 10.13779/j.cnki.issn1001-0076.2023.01.015

Citation:

HOU Sanya, HUANG Jiahao, Zhang Dou, CHEN Jing, HU Qiansheng, LUO Jun, RAO Mingjun. Effect of MgO/Al₂O₃ Mass Ratio on Mineralization Behavior of Limonitic Laterite Ore During Sintering[J]. Conservation and Utilization of Mineral Resources, 2023, 43(1): 140-147. doi: 10.13779/j.cnki.issn1001-0076.2023.01.015

Effect of MgO/Al₂O₃ Mass Ratio on Mineralization Behavior of Limonitic Laterite Ore During Sintering

1.
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, Hunan, China
2.
Guangdong Guangqing Metal Technology Co. Ltd., Yangjiang 529500, Guangdong, China

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Corresponding author: LUO Jun, luojun2013@csu.edu.cn

Received Date: 22 May 2022

Publish Date: 15 February 2023

Abstract

Abstract

To improve the production and quality indices of laterite ore sinter, the effect of MgO/Al₂O₃ mass ratio on the liquid volume and viscosity during high-temperature sintering was investigated, based on thermodynamic analysis. The influence of MgO/Al₂O₃ ratio on the phase composition and bonding phase strength of sinter was discussed through micro-sintering test, and the impact of MgO/Al₂O₃ mass ratio on sintering mineralization behavior of limonitic laterite ore was clarified. Finally, the validity of our findings was confirmed through sinter-pot large-scale sintering test. The results of micro-sintering test showed that the bond phase was mainly composed of calc-magnesia melilite and olivine and their compressive strength exceeded 4 000 N/P, under the condition of m(MgO)/m(Al₂O₃)=0.5~0.8, sintering temperature of 1 300 ℃, sintering atmosphere of 5%CO+95%N₂, binary basicity of m(CaO)/m(SiO₂)=1.3. The sinter-pot verification test revealed that increasing the MgO/Al₂O₃ mass ratio from 0.5 to 0.7, the yield of sinter did not change significantly and remained at approximately 70%, but its tumbling strength of sinter increased from 49.73% to 56.67%, and the optimal MgO/Al₂O₃ mass ratio was in the range of 0.6-0.7.
- limonite laterite ore /
- sintering mineralization /
- MgO/Al₂O₃ /
- bonding phase

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References

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