Behavior of Lead Ions in Cassiterite Flotation Using Octanohydroxamic Acid
Behavior of Lead Ions in Cassiterite Flotation Using Octanohydroxamic Acid
复制标题
辛氧肟酸浮选锡石中铅离子的行为
DOI：
10.1021/acs.iecr.7b02126
复制
发表时间：
2017-08-02
影响因子：
4.2
通讯作者：
Feng, Jian
中科院分区：
文献类型：
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作者：
Ren, Liuyi;Qiu, Hang;Feng, Jian
用微浮选试验研究了铅离子对锡石体系浮选性能的影响。进行了吸附实验、X射线光电子能谱(XPS)、接触角测量和Zeta(Zeta)-电位测量。采用辛基异羟肟酸和铅离子溶液形态模拟。将铅活化后的表面性质与锡石的浮选性能进行了关联。浮选结果表明，铅离子的加入激活了锡石的浮选。铅离子的加入增强了锡石对辛基异羟肟酸的吸附，而辛酸和铅离子的加入降低了锡石的润湿特性。(-)电位测量和溶液化学分析证实，锡石表面的铅(OH)(+)和铅-3(OH)(4)(2+)位增加了锡石的浮选回收率。XPS结果表明辛基异羟肟酸在锡石表面的吸附是通过化学吸附的方式进行的，与铅离子结合改变了锡石表面的化学性质。
The effects of lead ions on the flotation performance of the,cassiterite system have been investigated using microflotation tests. Adsorption experiments, X-ray photoelectron spectroscopy (XPS), contact angle measurement, and zeta (zeta)-potential measurements were conducted. Octanohydroxamic acid and lead ion solution speciation simulations were used. These were used to correlate surface properties of lead-activated with cassiterite flotation performance. Flotation results indicate that the addition of lead ions activates the cassiterite flotation. The addition of lead ions enhanced the adsorption of octanohydroxamic acid on cassiterite, and the wetting characteristic of cassiterite decreased in the presence of octanohydroxamic acid and the addition of lead ions. (-Potential measurements and solution chemistry analyses confirmed that flotation recovery of the cassiterite increases due to Pb(OH)(+) and Pb-3(OH)(4)(2+) sites on the cassiterite surface. XPS results indicated the adsorption of octanohydroxamic acid onto the cassiterite surface was through chemisorption, which combined with lead ions changed the chemical properties of the cassiterite surface.