不同漂浮剂对化核和生长的影响
Guangle Wang1, Xiao Bian1, Zeren Shang2
1School of Chemistry and Chemical Engineering, Qinghai Minzu University, Xining 810007, China.
Molecules (Basel, Switzerland)
|December 9, 2023
概括
诸如八甲基胺化物 (ODA) 和1-二甲基硫酸盐 (SDS) 等漂浮剂会影响化物 (KCl) 核化动力学. 这些药物促进同质核形成,同时抑制异质核形成,影响KCl生产中的颗粒大小分布.
科学领域:
- 矿物加工 矿物加工
- 结晶科学 结晶科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 漂浮剂在化 (KCl) 生产中至关重要,通常通过母液反流进入结晶阶段.
- 了解这些剂对KCl结晶的影响对于过程优化至关重要.
研究的目的:
- 调查特定浮化剂八甲基胺化物 (ODA),1-二甲基胺化物 (DAH) 和1-二甲基硫酸盐 (SDS) 对化核化动力学的影响.
- 分析这些药物如何影响同质和异质核,界面能量和生长机制.
- 为了将核化动力学与粒子大小分布相关联,以优化KCl生产.
主要方法:
- 聚焦束反射测量 (FBRM) 用于监测在浮动剂的存在下,在不同的超和下,KCl的核化诱导周期.
- 经验方程,古典核化理论 (CNT) 和生长机制方程被用于详细的数据分析.
- 分析了粒子大小分布,以与核化动力学相关联.
主要成果:
- 漂浮剂的存在显著增加了核化序列号 (m),观察到的顺序为m(ODA) >m(SDS) >m(DAH) >m(H2O).
- 界面能量数据表明,漂浮剂促进了KCl的同质核化 (减少了界面能量),并抑制了异质核化 (增加了界面能量).
- 化的生长遵循了二维核化介导的机制,不受漂浮剂的添加的影响,粒子大小分布与核化顺序保持一致.
结论:
- 漂浮剂通过促进同质核化和抑制异质核化来改变KCl核化动力学.
- 该研究证实了KCl的二维核化介导生长机制,独立于浮化剂的存在.
- 结果为优化KCl生产流程和开发新型漂浮剂提供了宝贵的见解.
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