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冶金含油固废资源化利用研究进展

Research progress on resource utilization of metallurgical oil-containing solid wastes

  • 摘要: 冶金含油固废兼具污染性与资源性,其高效处置与资源化利用是推动冶金行业绿色低碳发展的重要方向。本文围绕轧钢含油污泥、含油铜屑和含油铝屑等典型冶金含油固废,系统梳理了其来源、组成特征、产生规模及管理要求,重点综述了烧结、炼焦、高炉喷吹、转底炉处理及火法熔炼等返冶金流程协同利用路径以及化学热洗、溶剂萃取、氧化、热解、离心分离和蒸馏等脱油预处理技术的研究进展。现有研究表明,返冶金流程协同利用具有处理量大、金属回收率高、易与现有生产流程衔接等优势,但受原料中含有油脂及其热处理对环境污染等因素影响,含油固废通常难以直接大比例利用。脱油预处理可促进油固分离并改善物料性质,是提升其返流程适配性的关键前提,但仍面临成本、能耗、二次污染及脱油深度不足等瓶颈。本文在梳理各类技术适用性与局限性的基础上,指出冶金含油固废资源化利用需根据油质量分数、黏度及金属价值等参数,构建差异化利用的技术路线。最后展望了面向不同固废特征的分级利用、需求导向的脱油调质技术及油品-金属协同回收等未来研究方向。本文旨在梳理该类固废处置与资源化技术体系,明确各类技术应用特征与发展方向,为其多组分协同回收利用研究提供参考。

     

    Abstract: Metallurgical oil-containing solid wastes have both pollution potential and resource value, and their efficient disposal and resource utilization represent an important direction for promoting green and low-carbon development in the metallurgical industry. This paper focuses on typical metallurgical oil-containing solid wastes including rolling oil bearing sludge, oily copper scraps, and oily aluminum scraps. It systematically reviews their sources, compositional characteristics, generation scales, and management requirements. The review emphasizes the research progress in collaborative utilization pathways through return to metallurgical processes such as sintering, coke making, blast furnace injection, rotary hearth furnace treatment, and smelting, as well as on deoiling pretreatment technologies including chemical hot washing, solvent extraction, oxidation, pyrolysis, centrifugal separation, and distillation. Existing studies show that co-utilization in metallurgical processes offers advantages such as large treatment capacity, high metal recovery rates, and easy integration with existing production processes. However, due to factors such as the presence of oil in raw materials and environmental pollution caused by heat treatment, oily solid wastes are usually difficult to be directly utilized in large proportions. Deoiling pretreatment facilitates oil solid separation and improves material properties, serving as a key prerequisite for enhancing compatibility with these processes, yet it still faces bottlenecks including high cost, energy consumption, secondary pollution, and insufficient deoiling depth. Based on analysis of the applicability and limitations of various technologies, this paper points out that the resource utilization of metallurgical oil-containing solid wastes require the construction of differentiated technical routes according to parameters such as oil mass fraction, viscosity, and metal value. Finally, it discusses future research directions including graded utilization tailored to different wastes characteristics, demand oriented deoiling and conditioning technologies, and synergistic recovery of oil and metals. This paper aims to organize the technical framework for the disposal and resource utilization of such solid wastes, clarify the application characteristics and development directions of various technologies, and provide a reference for research on multi component synergistic recovery and utilization.

     

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