Synergistic mechanism for preparation of high-performance ceramsite from coal gangue and iron ore tailings

IF 7.8 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2025-07-15 DOI:10.1016/j.psep.2025.107591

Wenzhuo Ma , Wuju Zhang , Jian Pan , Deqing Zhu , Tao Dong , Zhengqi Guo , Congcong Yang , Siwei Li

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引用次数: 0

Abstract

Preparation of ceramsite from coal gangue (CG) and iron ore tailings (IOT) is an eco-friendly, sustainable and economical approach. This study aims to systematically investigate the characteristics of CG and IOT, and prepare high-performance ceramsite through their synergistic effect. The results show that CG, an excellent pelletizing material, compensates for the poor pelletizing property of IOT. And IOT makes up for the poor thermal stability of CG, to produce green pellets with good properties. The fluxes in IOT can improve the liquid phase formation capacity and decrease the roasting temperature of ceramsite. The formation of liquid phase can effectively prevent the gas escaping, which is beneficial to light weight. However, the excessive CaO and MgO in IOT are easy to narrow roasting temperature, while the CaO and MgO contents in CG are relatively low. So their combination is conducive to widening the suitable roasting temperature range. Meanwhile, the high SiO₂ and Al₂O₃ contents in CG provide a foundation to form the skeleton of ceramsite. The synergistic effect of CG and IOT creates good conditions for the preparation of high-performance ceramsite. 900 grade high-strength ceramsites were obtained with CG: IOT of 55:45 and 45:55, roasting temperature of 1180 ℃ and roasting time of 25 min. This research provides theoretical basis for the resourceful utilization of solid waste and the expansion of raw material sources of ceramsite.

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煤矸石与铁矿尾矿协同制备高性能陶粒的机理

从煤矸石和铁矿尾矿中制备陶粒是一种环保、可持续和经济的方法。本研究旨在系统研究CG和IOT的特性，并通过它们的协同效应制备高性能陶粒。结果表明，CG是一种优良的造球材料，弥补了IOT造球性能差的缺点。而IOT则弥补了CG热稳定性差的缺点，生产出性能良好的绿色颗粒。助熔剂可以提高陶粒的液相形成能力，降低陶粒的焙烧温度。液相的形成可有效防止气体逸出，有利于重量轻。然而，物联网中过量的CaO和MgO容易收窄焙烧温度，而CG中CaO和MgO含量相对较低。因此，它们的组合有利于扩大适宜的焙烧温度范围。同时，CG中较高的SiO2和Al2O3含量为陶粒骨架的形成提供了基础。CG和IOT的协同作用为制备高性能陶粒创造了良好的条件。在CG: IOT为55:45和45:55，焙烧温度为1180℃，焙烧时间为25 min的条件下，制得900级高强陶粒。该研究为固体废物资源化利用和陶粒原料来源的扩大提供了理论依据。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.