Abstract

This work provides a comprehensive review of research on the cold-bonding pelletization process used to produce lightweight aggregates (LWAs) using waste materials, to valorize the waste and, at the same time, minimize risks related to disposal. Research investigating various aspects of the cold-bonding process highlight: i) feasible mix-designs for pellet production; ii) the most relevant operating parameters affecting the process; and iii) the potential applications of the LWAs produced. The analysis gives a wide overview of the fundamental key-points that control the cold-bonding process. Data comparison provides a useful way to identify the optimal process conditions to allow development of optimum products. This involves the selection of the correct mix-design, including suitable binders and potential additives, and the selection of appropriate operating conditions, which are a function of the waste investigated, and/or waste mix characteristics. The review proposes an optimized approach to experimental studies on cold-bonding processes that has potential to enhance future process performance. Moreover, the present work provides a complete framework useful for decision-making for both manufacturers and researchers working to use this promising technique.

摘要

这项工作对用于使用废料生产轻质骨料 (LWA) 的冷粘合造粒工艺的研究进行了全面审查，以评估废物的价值，同时最大限度地减少与处置相关的风险。对冷粘合工艺各个方面的研究强调：i) 颗粒生产的可行混合设计；ii) 影响过程的最相关操作参数；iii) 生产的 LWA 的潜在应用。该分析对控制冷粘合过程的基本关键点进行了广泛的概述。数据比较提供了一种有用的方法来确定最佳工艺条件，以开发最佳产品。这涉及选择正确的混合设计，包括合适的粘合剂和潜在的添加剂，以及根据所调查的废物和/或废物混合特性选择适当的操作条件。该评论提出了一种对冷粘合工艺进行实验研究的优化方法，该方法具有提高未来工艺性能的潜力。此外，目前的工作提供了一个完整的框架，对致力于使用这种有前途的技术的制造商和研究人员的决策有用。