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.

该研究项目是一项更大的研究计划的一部分，该计划旨在了解和改善北美的摩擦式静电分离对钾肥处理的工业应用。环绕电荷是指由于颗粒之间的摩擦接触引起的颗粒电荷的发展。 一旦充电颗粒，就可以通过将它们放在两个相对充满电的板之间将它们分开，这称为静电分离。摩擦式分离的一个重要方面涉及钾盐条件的摩擦电荷背后的机制。在这种情况下，调节剂在支流电荷之前将其应用于钾混合物。需要对摩擦电荷充电机制的改进理解，以使萨斯喀彻温省钾盐矿石应用于摩电式分离。 该项目的主要目的是验证以下假设：离子转移的过程控制钾肥条件的摩擦电荷。将进行实验测试，以说明调节剂在充电前是否有选择性吸附和分离，以及在充电期间转移离子。 通过调查条件摩擦电力充电过程中每个步骤的钾肥颗粒上的表面层组成，将确认基本机制。 验证托架电荷背后的机制是实施北美钾盐分离的基础步骤。改进的涉及摩擦电荷和静电分离的过程将具有重大的好处，其中可能包括：减少水量，减少试剂消耗和减少能源消耗。它还将解释为什么粘土干扰静电分离以及如何减轻其不良反应。