Mitigation of concrete corrosion in potash mine and milling operations

减轻钾矿和铣削作业中的混凝土腐蚀

• 批准号: 493198-2015
• 负责人: Grosvenor, Andrew
• 金额: $ 10.1万
• 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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=652519
• 关键词: Mitigation; concrete; corrosion; potash; mine

The natural resource sector is an important part of Canada's economy. Of the many natural resources that are mined in Canada, potash mining is centred in Saskatchewan. Potash mining has created a significant number of jobs in Canada, and, in 2013, potash production was valued at $5.6 billion with $16.4 billion worth of investment by potash producers expected in the province over the next 20 years. Corrosion, particularly concrete corrosion, represents a significant safety and environmental issue for potash mine and mill operations. Concrete corrosion is accelerated in a potash mill environment because of the high chloride content in potash production. The corrosion of reinforcing bar (rebar) in concrete leads to the cracking and spalling of concrete. The objective of this research program, to be performed in collaboration with Mosaic, Agrium, Potash Corporation of Saskatchewan, and BHP Billiton through the International Mineral Innovation Institute (IMII), is to test the effectiveness of polystyrene sulfonate coated rebar on restricting chloride ingress to the rebar surface so as to restrict the corrosion of rebar. The effect of concrete composition on the degree of corrosion that occurs will also be investigated. The comprehensive study of concrete corrosion will involve electrochemical experiments and synchrotron radiation studies using multiple beamlines at the Canadian Light Source (CLS). This research program will provide considerable information on the effect of coated rebar and concrete composition on mitigating concrete corrosion. This research program is part of a broader Saskatchewan based initiative to understand the effect of various forms of corrosion on potash mine and mill operations so to develop corrosion mitigation strategies. Expanding the potash industry will require a reduction in environmental impact and increase in safety to ensure sustainability, which this program seeks to address.**

自然资源部门是加拿大经济的重要组成部分。在加拿大开采的许多自然资源中，钾肥开采集中在萨斯喀彻温省。钾肥开采为加拿大创造了大量就业机会。2013年，加拿大钾肥产值达56亿美元，预计未来20年加拿大钾肥生产商将在该省投资164亿美元。腐蚀，特别是混凝土腐蚀，是钾肥矿和钾肥厂运营的一个重大安全和环境问题。由于钾肥生产中氯化物含量高，混凝土腐蚀在钾肥磨环境中加速。混凝土中钢筋（螺纹钢）的腐蚀导致混凝土开裂和剥落。该研究项目将通过国际矿物创新研究所（IMII）与Mosaic、Agrium、Saskatchewan钾肥公司和必和必拓合作进行，目的是测试聚苯乙烯磺酸盐涂层螺纹钢在限制氯化物进入螺纹钢表面从而限制螺纹钢腐蚀方面的有效性。混凝土成分对腐蚀程度的影响也将被研究。混凝土腐蚀的综合研究将包括电化学实验和在加拿大光源（CLS）使用多束线的同步辐射研究。本研究项目将提供大量关于涂覆钢筋和混凝土成分对减轻混凝土腐蚀的影响的信息。该研究项目是萨斯喀彻温省一项更广泛的倡议的一部分，该倡议旨在了解各种形式的腐蚀对钾肥矿和工厂运营的影响，从而制定缓解腐蚀的策略。扩大钾肥行业将需要减少对环境的影响，并提高安全性，以确保可持续性，这是该计划寻求解决的问题