Experiment and Research on the Separation Process of High Ash and Difficult Floatable Fine Coal

Abstract:

As for certain high ash and difficult floatable fine coal, the coal quality characteristic is the frangible and easyly-clayed main gangue mineral kaolinite, and the high content of fine-grade and intermediate density grade materials. In order to reduce tiny slimes pollution and to increase quality and recovery rate of concentrate, we used cyclonic-static micro-bubble flotation column and XFD-3 flotation machine to experiment on separation process. It probed into re-concentration after grinding rough refined coal, classified flotation process and selective agglomeration-flotation process these three technical processes. The comparison of flotation machine test result showed that, using the flotation column as separation equipment, process of re-concentration after grinding rough refined coal could obtain the best refined coal accumulation index. When medicaments dosage is kerosene 800 g/t, GF 300 g/t, and sodium hexametaphosphate 1500g/t, refined coal production rate of flotation column is 59.47% and ash content is 10.63%.

• Periodical: Advanced Materials Research (Volumes 113-116)
• Pages: 1565-1571
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.113-116.1565
• Online since: June 2010
• Authors: Xia Hui Gui, Jiong Tian Liu, Xiu Xiang Tao, Yi Jun Cao, Yong Tian Wang
• Keywords: Coal Quality Characteristic, Cyclonic-Static Micro-Bubble Flotation Column, Difficult Floatable Coal, Separation Process

References

[1] TangShan High Efficient Medicament Research Team: Coal Preparation Technology. pp.2-10 (1987), Vol. 1.

[2] Wang Ruigang, Zhang Yanqiu: China Mining Magazine. pp.103-105 (2007), Vol. 16.

[3] Xie Guangyuan, Zhang Mingxu, Bian Bingxin and Fan Mingqiagn, in: XUANKUANGXUE, edited by Xie Jingxuan, volume 4 of Progress in Application and Technology of Flotation, chapter, 4, The Press of China University of Mining and Technology (2002).

[4] Shu Xinqian, Wang Zuna and Ge Lingmei: Coal Conversion. pp.40-44 (19962), Vol. 19.

[5] Ma Xiaomei: Jiangsu Coal. pp.37-39 (1992), Vol. 4.

[6] Shi Changxing, Wang Zenan and Xie Guangyuan: Coal Engineering. pp.58-60 (2005), Vol. 3.

[7] Xie Guangyuan, WU Ling, Ou Zeshen, Zhang Xiupeng and Wang Wuping: Journal of China University of Mining & Technology. pp.756-760 (2005), Vol. 34.

[8] Ding Liqin: Coal Preparation Technology. pp.31-35 (1980), Vol. 3.