The sodium roasting-water leaching process, the primary method for recycling valuable metals in spent FCC catalysts, has been industrialized and has good economic benefits. However, it also presents a significant challenge. Every ton of waste processed by the FCC catalyst will produce 0.75 tons of tailings, mainly containing silicon-aluminum-based substances, residual valuable metals, and other harmful components. These spent FCC catalyst tailings are listed as hazardous in the 'National List of Hazardous Wastes.' The need for harmless tailings disposal is crucial for its resource utilization and to mitigate its environmental impact. This study, which focuses on the resource characteristics of silicon-aluminum-based substances in spent FCC catalyst tailings, develops a method to shield harmful components and solve the resource utilization problem, which can significantly impact the waste management field. The research has laid a theoretical foundation for hazardous waste's harmless disposal and resource utilization.

中文翻译：

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FCC 催化剂废尾矿中有害成分的屏蔽研究


钠焙烧-水浸出工艺是回收废催化裂化催化剂中有价金属的主要方法，现已实现工业化，具有良好的经济效益。然而，它也带来了重大挑战。FCC 催化剂每处理一吨废物，会产生 0.75 吨尾矿，主要含有硅铝基物质、残留的贵重金属和其他有害成分。这些废 FCC 催化剂尾矿在“国家危险废物清单”中被列为危险品。无害的尾矿处置需求对于其资源利用和减轻其环境影响至关重要。本研究重点研究了废催化裂化催化剂尾矿中硅铝基物质的资源特性，开发了一种屏蔽有害组分的方法，解决了资源利用问题，可对废物管理领域产生重大影响。该研究为危险废物的无害化处置和资源化利用奠定了理论基础。