期刊
POWDER TECHNOLOGY
卷 393, 期 -, 页码 109-115出版社
ELSEVIER
DOI: 10.1016/j.powtec.2021.07.073
关键词
Quartz; Hematite; CMCS; Reverse flotation; Depressant
资金
- National Natural Science Foundation of China [51904214, 51804238]
- Open Foundation of State Key Laboratory of Mineral Processing, BGRIMM Technology [BGRIMM-KJSKL-2021-22]
- Fundamental Research Funds for the Central Universities [WUT: 2021IVA110, WUT: 2021IVA039]
Depressant carboxymethyl chitosan (CMCS) was introduced to reverse flotation of quartz from hematite using collector DDA. The reagent scheme of DDA/CMCS could achieve efficient separation of quartz from hematite, with CMCS showing better selective depression ability than starch. Zeta potential measurements illustrated that CMCS could prevent DDA adsorption onto the hematite surface, while it did not affect the interaction between DDA and quartz surface.
Depressant carboxymethyl chitosan (CMCS) was introduced to reverse flotation of quartz from hematite using collector DDA. Microflotation experiments presented that CMCS completely depressed the hematite flotation while it had little effect on quartz flotation. The mineral mixture flotation confirmed the reagent scheme of DDA/CMCS could achieve efficient separation of quartz from hematite. It was also found that CMCS has better selective depression ability than the widely-used starch. Zeta potential measurements illustrated that CMCS could prevent DDA adsorption onto the hematite surface, while it did not affect the interaction between DDA and quartz surface. X-ray photoelectron spectroscopy (XPS) indicated that CMCS interacted with the Fe(III) components of hematite by chemisorption, which was stronger than the bonding between starch and hematite. Molecular dynamics simulation (MDS) further revealed the twice interaction energy of CMCS with (001) hematite surface than that of starch. Hence, CMCS has the potential to replace starch in practice. (c) 2021 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据