Role of surface roughness in the wettability, surface energy and flotation kinetics of calcite
Role of surface roughness in the wettability, surface energy and flotation kinetics of calcite
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DOI：
10.1016/j.powtec.2020.05.081
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发表时间：
2020-06
影响因子：
5.2
通讯作者：
Xianchen Wang;Qin Zhang
中科院分区：
文献类型：
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作者：
Xianchen Wang;Qin Zhang
方解石的表面润湿性和浮选动力学特性对于将其与其他共生矿物分离具有重要意义，而表面粗糙度对方解石颗粒的润湿性和可浮性起着重要作用。本文研究了粗糙度对方解石润湿性、表面能和浮选动力学的影响。结果表明，粗糙度增加了亲水性方解石表面的润湿性，同时增强了疏水性表面的疏水性。各种粗糙度表面的润湿性和表面能之间存在良好的相关性。相同粒度分数的棒磨颗粒的粗糙度（λ）比球磨颗粒高约5%，且粗颗粒的粗糙度一般大于细颗粒。颗粒粗糙度与浮选率（k）之间的关系可以很好地定量表征：球磨机k=0.0039λ2–0.0589λ+2.6097，棒磨机k=0.1251λ+0.8184。
The surface wettability and flotation dynamic characteristics of calcite are of great significance for separating it from other coexisting minerals, and the surface roughness plays an important role in the wettability and floatability of calcite particles. In this paper, the effect of roughness on the wettability, surface energy, and flotation kinetics of calcite were investigated. Results indicated that roughness increased the wettability of the hydrophilic calcite surface, while enhanced the hydrophobicity of the hydrophobic surface. There was a good correlation between the wettability and surface energy of various roughness surfaces. The roughness (λ) of rod milled particles of the same size fraction was about 5% higher than that of ball-milled particles, and that of coarse particles was generally greater than fine. The relationship between particles roughness and flotation rate (k) can be quantitatively characterized well by k = 0.0039λ2–0.0589λ + 2.6097 for ball mill, and k = 0.1251λ + 0.8184 for rod mill.