Improving ultrafine low-rank coal flotation using polyacrylamide grafted polyvinylpyrrolidone

Lin, Qiuyu1,2; Mei, Yujie1,2; Huang, Wei2,3; Jiang, Fenghao2; Liu, Ke2,3

2022-10-01

10.1080/19392699.2022.2132484

International Journal of Coal Preparation and Utilization   Impact Factor & Quartile

1939-2699

1939-2702

The flotation performance of ultrafine particles is affected by many factors, especially surface hydrophobicity and agglomeration behaviors. As a solid waste, ultrafine low-rank coal (ULC) possesses poor hydrophobicity, which caused its poor flotation performance. Hence, the key to the economic recovery of ULC is to improve its hydrophobicity. This research reported a graft copolymer, polyacrylamide grafted polyvinylpyrrolidone (PVP-g-PAM), which was effective in the surface hydrophobic modification and agglomeration of ULC. PVP-g-PAM used in this study was synthesized by a microwave-initiated process and has been characterized through elemental analysis, XPS, FT-IR, and SEM measurements. The contact angle offered a direct observation of the hydrophobic effect of PVP-g-PAM on ULC. The agglomeration test proved that the size of agglomerates of ULC was enhanced with the presence of PVP-g-PAM. The enhanced agglomeration of ULC induced by PVP-g-PAM solved the issues of low flotation recovery. The hydrophobic modification effect of the graft copolymer indicated the advantage of PVP-g-PAM in the purity and flotation rate of ULC concentrate. The addition of copolymers was found to be an effective method for the enhancement of ULC flotation.

Hydrophobicity flotation ultrafine low-rank coal graft copolymer agglomeration

SCI

English

Corresponding

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N532] ; RevTech-SUSTech Joint RMS Technology Development Project[OR2109006]

Energy & Fuels ; Mining & Mineral Processing

Energy & Fuels ; Mining & Mineral Processing

WOS:000874744100001

TAYLOR & FRANCIS INC

Web of Science

1.Harbin Inst Technol, Sch Chem & Chem Engn, Harbin, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen, Peoples R China
3.Southern Univ Sci & Technol, Clean Energy Inst, Acad Adv Interdisciplinary Studies, Shenzhen, Peoples R China

Lin, Qiuyu,Mei, Yujie,Huang, Wei,et al. Improving ultrafine low-rank coal flotation using polyacrylamide grafted polyvinylpyrrolidone[J]. International Journal of Coal Preparation and Utilization,2022.

Lin, Qiuyu,Mei, Yujie,Huang, Wei,Jiang, Fenghao,&Liu, Ke.(2022).Improving ultrafine low-rank coal flotation using polyacrylamide grafted polyvinylpyrrolidone.International Journal of Coal Preparation and Utilization.

Lin, Qiuyu,et al."Improving ultrafine low-rank coal flotation using polyacrylamide grafted polyvinylpyrrolidone".International Journal of Coal Preparation and Utilization (2022).