Research on the Extract Al₂O₃ from Coal Gangue

Abstract:

The experiments selected Wang Taipu gangue as raw materials and adopted single factor experimental method to study the leaching of aluminum oxide from gangue by using hydrochloric acid as leaching medium. The experiments studied solvent/sample mass ratio, hydrochloric acid/sample, liquid-solid ratio, hydrochloric acid concentration, leaching time and leaching temperature on Al₂O₃ leaching rate of coal gangue. Through the parallel experiment of the above factors, we can found that optimization conditions of hydrochloric acid leaching of alumina were: solvent /sample mass ratio: 0.20, solvent: NaF, liquid-solid ratio: 1:10, hydrochloric acid concentration: 6mol/L, leaching time: 150min, leaching temperature:110°C. In this case, the aluminum oxide of optimal leaching rate was 79.33%.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 1947-1950
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.1947
• Online since: May 2012
• Authors: Lei Zhang, Hao Wang, Yu Li
• Keywords: Acid Leach Method, Al₂O₃ Extraction Rate, Coal Gangue

References

[1] Zhongai Gao, Menglan Qi. Higher Education Press, 1999, 36-51(in Chinese)

[2] Xinyu Li,Jingsen Fan,Yafei Lei. Journal of Ecology and Environment, 2009, 11(9):19-26(in Chinese)

[3] Zhengxian Ma, Zhijun Ma, Yundong Ma. Non-ferrous Smelting, 2006, 8(14):17-23(in Chinese).

[4] Wenying Lv. Environmental engineering, 1995, 4:23-26(in Chinese).

[5] Lixia Yang, Yongfeng Zhang, Jing Lin. Coal Processing and Utilization, 2009, 5:46(in Chinese).

[6] Li Chen, Xinqian Shu, Lixin Zhang. Coal Processing and Utilization, 2007, 6(in Chinese).

[7] Zhenming Zhao, Wendong Zhang, Yongsheng Li. Coal Processing and Utilization, 1999, 1:23-24(in Chinese).