Mitigation of filter fouling in a mine waste filtration system

减轻矿山废物过滤系统中的过滤器污垢

• 批准号: 478382-2015
• 负责人: Wild, Peter
• 金额: $ 1.82万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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=579460
• 关键词: Mitigation; filter; fouling; mine; waste

CEC Mining Systems Corp. manufactures mine waste dewatering systems based on traditional rotary vacuum disc filters. These systems are used to dewater mine tailings to more than 80% solids. This enables storage as a packed solid, reducing or eliminating the need for tailings ponds and the associated dams or weirs and, thereby, reducing both water consumption and land use. This technology offers a cost-effective and environmentally safe alternative to the conventional tailings management facilities which have been the de-facto regime in Canada for the past 150 years. The filter media in this system is a ceramic-polymer blend, which is formed in plates that are secured to the faces of the rotating discs. Although these filter plates are backwashed once in each revolution of the system rotor, irreversible performance degradation ultimately reduces effectiveness such that plates must either be removed for ultrasonic/acid cleaning or replaced. Both plate cleaning and plate replacement can represent a significant component of total cost of dewatering operations. The objectives of the proposed research are (1) to identify the dominant filter performance degradation mechanisms and system operating and design parameters that are drivers for these mechanisms and (2) to develop research strategies that will guide modification of these parameters that will lead to enhanced system performance. Advancement of the body of work surrounding the factors attributed to ceramic plate degradation would allow for more mining operators in Canada to adopt "dry-stacking" as a practice. By de-risking the selection criteria (e.g. cost estimations) between tailings management solutions, CEC would be in a position to positively impact the current and projected liabilities to local communities, regional and federal governments and shareholders of mining companies.

CEC采矿系统公司生产基于传统旋转真空盘式过滤机的矿山废物脱水系统。这些系统用于将尾矿中的固体含量提高到80%以上。这使得能够作为填充固体储存，减少或消除对尾矿池和相关水坝或堰的需要，从而减少水消耗和土地使用。这项技术提供了一个具有成本效益和环境安全的替代传统尾矿管理设施，这是加拿大过去150年来的事实制度。 该系统中的过滤介质是陶瓷-聚合物混合物，其形成为固定到旋转盘的表面的板。虽然这些过滤板在系统转子的每转中被反洗一次，但是不可逆的性能退化最终降低了效率，使得板必须被移除以进行超声波/酸清洗或者被更换。板清洗和板更换都是脱水操作总成本的重要组成部分。 拟议研究的目标是（1）确定主要的过滤器性能退化机制以及驱动这些机制的系统操作和设计参数，以及（2）制定研究策略，指导修改这些参数，从而增强系统性能。 围绕陶瓷板退化因素开展的大量工作的进展将使加拿大更多的采矿经营者采用“干堆”做法。通过降低尾矿管理解决方案之间的选择标准（例如成本估算）的风险，CEC将能够对当地社区、地区和联邦政府以及矿业公司股东的当前和预计负债产生积极影响。