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首页> 外文会议>Sixth International Conference on Environmental Issues and Management of Waste in Energy and Mineral Production Swemp 2000, May 30-Jun 2, 2000, Calgary, Alberta >Development of composite tailings technology at Syncrude Canada
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Development of composite tailings technology at Syncrude Canada

机译：Syncrude Canada开发复合尾矿技术

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摘要

During extraction of bitumen from the Athabasca Oil Sands, an aqueous fines suspension, called mature fine tails (MFT), is produced. The geotechnical characteristics of MFT demand long term storage in geotechnically secure containment areas. The composite tailings (CT) process involves mixing a coarse tailings stream with a MFT stream and adding a coagulant to form slurry that rapidly releases water when deposited and binds the MFT in a coarse tailings/MFT deposit. Thus, more of the fines can be stored in a geotechnical soil matrix, which reduces the inventory of fluid-fine tails and enables a wider range of reclamation alternatives. CT process optimization, coupled with public and regulatory consultation at key milestones, has led to a corporate commitment to implement this technology. This paper reviews key aspects of the evolution of the CT process at Syncrude, including segregation, depositional and geotechnical characteristics of CT mixes that are formed with various chemical aids. Some of the treatments discussed include those based on the use of acid, lime, gypsum, alum, and organic polymers as the coagulant aids.
机译：从阿萨巴斯卡油砂中提取沥青的过程中，会产生一种称为成熟细尾矿（MFT）的细粉状水悬浮液。 MFT的岩土特征要求在岩土安全的围护区内长期存放。复合尾矿（CT）工艺涉及将粗尾矿流与MFT流混合，并添加凝结剂以形成淤浆，该淤浆在沉积时会迅速释放水，并将MFT结合在粗尾矿/ MFT沉积物中。因此，更多的细粉可以存储在土工土壤基质中，这减少了细粉尾矿的存量，并实现了更广泛的填海替代方案。 CT工艺的优化，再加上关键里程碑上的公共和法规咨询，已导致企业承诺实施该技术。本文回顾了Syncrude CT工艺发展的关键方面，包括由各种化学助剂形成的CT混合物的分离，沉积和岩土特征。讨论的一些处理方法包括基于使用酸，石灰，石膏，明矾和有机聚合物作为助凝剂的处理方法。

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