A selective flotation of cassiterite with a dithiocarbamate-hydroxamate molecule and its adsorption mechanism

被引：52
作者：
Qi, Jing [1 ]
Dong, Yan [1 ]
Liu, Sheng [1 ]
Liu, Guangyi [1 ]
机构：
[1] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2021年 / 538卷
基金：
中国国家自然科学基金;
关键词：
Cassiterite; Hydroxamic acid; Dithiocarbamate; Flotation; In situ AFM; FE III IONS; HYDROPHOBIC MECHANISM; BENZOHYDROXAMIC ACID; ACTIVATION MECHANISM; CONTACT-ANGLE; SODIUM OLEATE; LEAD IONS; PERFORMANCE; COLLECTOR; SURFACE;
D O I：
10.1016/j.apsusc.2020.147996
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
N-[(3-hydroxyamino)-propoxy]-N-octyl dithiocarbamate (OAHD) was designed as cassiterite flotation collector. AFM clearly showed that OAHD assembled on cassiterite surfaces to generate innumerable nano-aggregates. The FTIR and XPS recommended that the adsorption of OAHD was related to forming the [GRAPHICS] and [GRAPHICS] configurations in the surface OAHD-Sn(IV) complexes, which improved the hydrophobicity, decreased the surface energy and hydrophilicity index, and realized an effective flotation enrichment of cassiterite particles. In addition, the dithiocarbamate group might act as a hydrophilic group for calcite flotation, while as a chelating group for cassiterite flotation, which rendered OAHD to return the lower flotation recovery of calcite than octyl hydroxamic acid, and the excellent collecting properties towards cassiterite.
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页数：9
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