Conditioned tribo-electric charging of potash particles

钾颗粒的条件摩擦起电

• 批准号: 485173-2015
• 负责人: Bergstrom, Donald
• 金额: $ 2.48万
• 依托单位: University of Saskatchewan
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=584774
• 关键词: Conditioned; tribo; electric; charging; potash

This research project is part of a larger research program to understand and improve the industrial application of tribo-electrostatic separation to potash processing in North America. Tribo-electric charging refers to the development of electric charge on particles due to frictional contact between the particles. Once the particles are charged, then they can be separated by dropping them between two oppositely charged plates, which is referred to as electrostatic separation. One important aspect of tribo-electrostatic separation concerns the mechanism behind conditioned tribo-electric charging of potash. In this case, conditioning agents are applied to the potash mixture prior to tribo-electric charging. An improved understanding of the mechanism of tribo-electric charging is required to enable tribo-electric separation to be applied in Saskatchewan potash mines. The primary objective of this project is to verify the hypothesis that the process of ionic transfer governs the conditioned tribo-electric charging of potash. Experimental tests will be conducted to show whether conditioning agents are selectively sorbed and dissociated before charging, and if ions are transferred during charging. By investigating the composition of the surface layer on potash particles for each step in the conditioned tribo-electric charging process, the underlying mechanism will be confirmed. Verifying the mechanism behind tribo-electric charging is a foundational step for the implementation of electrostatic separation of potash in North America. An improved process involving tribo-electric charging and electrostatic separation will have significant benefits that could include: reduced water consumption, decreased reagent consumption and decreased energy consumption. It will also explain why clays interfere with electrostatic separation and how their adverse effects can be mitigated.

该研究项目是一个更大的研究计划的一部分，旨在了解和改进摩擦静电分离在北美钾肥加工中的工业应用。摩擦起电是指由于颗粒之间的摩擦接触而在颗粒上产生电荷。 一旦颗粒带电，就可以通过将它们放在两个带相反电荷的板之间来将它们分离，这称为静电分离。摩擦静电分离的一个重要方面涉及钾盐条件摩擦带电背后的机制。在这种情况下，在摩擦起电之前将调节剂施加到钾盐混合物中。需要加深对摩擦起电机制的了解，才能使摩擦起电分离应用于萨斯喀彻温省钾矿。 该项目的主要目标是验证离子转移过程控制钾盐条件摩擦起电的假设。将进行实验测试，以显示调理剂在充电前是否被选择性吸附和解离，以及充电过程中离子是否发生转移。 通过研究调节摩擦充电过程中每个步骤的钾颗粒表面层的成分，将证实其潜在机制。 验证摩擦起电背后的机制是在北美实施钾肥静电分离的基础步骤。涉及摩擦起电和静电分离的改进工艺将具有显着的好处，包括：减少水消耗、减少试剂消耗和减少能源消耗。它还将解释为什么粘土会干扰静电分离以及如何减轻其不利影响。