流体细粒尾矿处理技术的基础研究进展

X. Yuan, H. Li, J. Zhou, L. Zhao
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引用次数: 0

摘要

流体细尾砂(FFT)管理是油砂开发商一直面临的主要挑战之一。Syncrude Canada Ltd独立或与加拿大油砂创新联盟(COSIA)成员公司合作,开发了各种加速FFT脱水的技术,以满足逐步关闭矿山和复垦的目标。其中一项技术是针对FFT中存在问题的粘土进行FFT处理。该技术的基础是使用聚合絮凝剂扩大粘土的有效粒径,并使用捕集剂将粘土表面由亲水性变为疏水性。这样,处理后的FFT脱水非常快。一个有效的、易于使用的收集器是该技术成功的关键。捕收剂是添加到FFT中的化合物,它可以改变粘土的疏水性,促进粘土颗粒的聚集,并帮助FFT脱水。理论上,可以直接使用阳离子收集器或金属离子和阴离子收集器的组合使带负电荷的FFT粘土疏水。基于这个概念,已经开发和测试了几个流程技术场景。本文展示了基础研究如何提供一种简单而经济有效的方法来筛选用于操作FFT粘土处理的收集器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Advancements of fluid fine tailings treatment technologies through fundamental research
Fluid fine tailings (FFT) management is one of the main challenges that oil sand developers continue to face. Syncrude Canada Ltd, independently or in collaboration with Canada’s Oil Sands Innovation Alliance (COSIA) member companies, has developed various technologies to accelerate FFT dewatering to meet progressive mine closure and reclamation objectives. One of the technologies is FFT clay treatment that targets the problematic clays in FFT. The basis of this step-out technology is the use of a polymeric flocculant to enlarge the effective size of clays and a collector to change the clay surfaces from hydrophilic to hydrophobic. In this way, the treated FFT dewaters very fast. An effective, easy to use collector is key to the success of this technology. Collectors are chemical compounds added to FFT that change the clay hydrophobicity, promote aggregation of clay particles and assist in FFT dewatering. Theoretically, it is possible to directly use a cationic collector or a combination of a metal ion and an anionic collector to make the negatively charged FFT clays hydrophobic. Building on this concept, several process technology scenarios have been developed and tested. This paper demonstrates how fundamental research provides a simple and cost-effective method for screening collectors for operational FFT clay treatment.
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