在甲和多洛米特的反浮动中,粗细颗粒之间的相互作用行为
Xiaofen Huang1,2,3,4, Qin Zhang5,2,3,4
1College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, Guizhou, China.
Langmuir : the ACS journal of surfaces and colloids
|August 30, 2023
概括
微细的多洛米特颗粒 (-10微米) 通过涂层矿物表面来阻碍矿石浮动,减少反向浮动过程中的回收和选择性. 这种粘液涂层效应归因于吸引力和非选择性聚合.
科学领域:
- 矿物加工 矿物加工
- 表面化学 表面化学
- 地质化学 地质化学
背景情况:
- 低级酸盐矿石的高效漂浮需要通过精细研磨进行矿物质解离.
- 像多洛米特这样的细矿物质容易过度研磨成粘液,从而对漂浮效率产生负面影响.
- 了解微型多洛米特颗粒的行为对于优化矿石加工至关重要.
研究的目的:
- 研究细细的多洛米特颗粒 (-10微米) 影响较粗的多洛米特 (-75 + 25微米) 和酸 (-75 + 25微米) 的浮动的详细机制.
- 阐明精细多洛米特在减少矿反浮动回收和选择性的作用.
主要方法:
- 微漂浮试验是微漂浮试验.
- 结晶电子显微镜分析分析
- 接触角度测量 接触角度测量
- 气泡粒子附着试验 气泡粒子附着试验
- 对于相互作用能量计算的EDLVO理论.
主要成果:
- 细型多洛米特颗粒显著降低了多洛米特和酸的回收.
- 多洛米特细掩盖了矿物表面,降低了疏水性,并阻碍了浮动.
- 精细的多洛米特被吸附在酸上,导致其被纳入缩物和降低漂浮选择性.
- 相互作用能量的计算表明,细型多洛米特与酸和粗型多洛米特之间存在吸引力,导致非选择性聚合 (粘土涂层).
结论:
- 细小的多洛米特颗粒在酸盐逆漂浮中起到压抑作用,通过引起粘液涂层和非选择性聚合.
- 微型多洛米特的存在大大降低了酸盐矿石漂浮的效率和选择性.
- 控制或减轻微型多洛米特的影响对于改善从中低级矿石中提取酸盐至关重要.
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