DETA mitigation strategies for Strathcona Mill

Strathcona 工厂的 DETA 缓解策略

• 批准号: 522934-2017
• 负责人: Bobicki, Erin
• 金额: $ 0.84万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697748
• 关键词: DETA; mitigation; strategies; Strathcona; Mill

Glencore is considering the use of DETA (diethylenetriamine), a mineral processing reagent, to improve process performance in Strathcona Mill, located near Sudbury, Ontario. DETA forms soluble complexes with nickel and copper ions, and can cause the concentration of these metal ions to exceed the value permitted in the final effluent. The objectives of this project are to study the interaction of DETA with water and solids in the tailings area, and develop mitigation strategies. The research will begin with a literature review and the development of an HPLC (high-performance liquid chromatography) method for detection of DETA and DETA-metal complexes in solution. Next, geochemical modeling will be performed to predict the DETA-metal complexes that are likely to form under various conditions. Adsorption isotherms will also be developed to determine how much DETA will adsorb on mineral solids, and how much will remain in solution. Together, the geochemical modeling results and adsorption isotherms will be used to create a model for the Strathcona tailings management area that will predict the concentration of DETA in the final effluent under various scenarios. Lysimeter tests will then be set up to study the long-term stability of DETA adsorbed on the mineral solids over several years. Lastly, an active biodegradation process will be developed for the destruction of DETA and DETA compounds in tailings slurry, both in solution and on the solids. If Glencore can safely use DETA, the company will be able to improve nickel recovery and concentrate grade, which will have a large economic benefit. The ultimate development of an effective mitigation technology that permits the responsible use of DETA will benefit other mining companies as well.

Glencore 正在考虑使用 DETA（二乙烯三胺）（一种选矿试剂）来提高位于安大略省萨德伯里附近的 Strathcona 工厂的工艺性能。 DETA 与镍和铜离子形成可溶性络合物，并可能导致这些金属离子的浓度超过最终废水中允许的值。该项目的目标是研究尾矿区 DETA 与水和固体的相互作用，并制定缓解策略。该研究将从文献综述和开发用于检测溶液中 DETA 和 DETA-金属络合物的 HPLC（高效液相色谱）方法开始。接下来，将进行地球化学建模来预测在各种条件下可能形成的 DETA-金属络合物。还将开发吸附等温线，以确定有多少 DETA 将吸附在矿物固体上，以及有多少将保留在溶液中。地球化学模拟结果和吸附等温线将共同用于为 Strathcona 尾矿管理区创建一个模型，该模型将预测各种情况下最终流出物中 DETA 的浓度。然后将进行蒸渗计测试，以研究多年来吸附在矿物固体上的 DETA 的长期稳定性。最后，将开发一种主动生物降解工艺，用于破坏尾矿浆中的 DETA 和 DETA 化合物，无论是在溶液中还是在固体上。如果嘉能可能够安全地使用DETA，公司将能够提高镍回收率和精矿品位，从而产生较大的经济效益。最终开发出有效的缓解技术，允许负责任地使用 DETA，也将使其他矿业公司受益。