利用粉碎的废聚氯乙烯薄膜作为铁矿石还原的替代还原剂

IF 3.1 2区 化学 Q2 CHEMISTRY, ANALYTICAL
Guang Wang, Minjin Zhu, Hongqiang Zhang, Qing-guo Xue, Jingsong Wang
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引用次数: 0

摘要

在环境问题日益受到关注以及人们对可持续材料的兴趣与日俱增等各种因素的推动下,利用废塑料替代煤粉和焦炭作为还原剂的研究引起了广泛关注。本研究调查了使用废聚氯乙烯(PVC)和铁精矿混合物进行碳热还原的过程。热重分析表明,与无烟煤相比,经过热处理的聚氯乙烯产品(PVC370)具有更优越的反应性能。还原测试表明,含 PVC370 的球团对温度变化的敏感性低于含无烟煤的球团,这突出了 PVC370 在工业应用中的潜在优势。此外,在温度达到 1150 ℃ 之前,含 PVC370 的球团的金属化率超过了含无烟煤的球团。在温度为 1100 ℃、C/O 为 0.8 时,含 PVC370 粒子的金属化率达到 83.17 % 的峰值。在含 PVC370 粒子的还原过程中,氢气 (H2)、一氧化碳 (CO) 和氯化氢 (HCl) 在相对较低的温度下被有效释放。还原过程中气体释放的效率可能与某些因素有关,例如含 PVC370 粒子的成分或结构。值得注意的是,即使考虑氯含量,含 PVC370 的颗粒在还原过程中产生的气体质量也优于含无烟煤的颗粒。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Utilizing pulverized waste polyvinyl chloride film as an alternative reducing agent for iron ore reduction

Utilizing pulverized waste polyvinyl chloride film as an alternative reducing agent for iron ore reduction

Utilizing pulverized waste polyvinyl chloride film as an alternative reducing agent for iron ore reduction

The research into using waste plastics as a substitute for coal powder and coke as a reducing agent has garnered significant attention, driven by various factors such as increased environmental concerns and growing interest in sustainable materials. This study investigates the process of carbothermal reduction using a mixture of waste polyvinyl chloride (PVC) and iron concentrate. Thermogravimetric analysis demonstrated that the heat-treated polyvinyl chloride products (PVC370) exhibited superior reaction properties compared to anthracite. Reduction tests indicated that PVC370-bearing pellets were less sensitive to temperature changes than anthracite-bearing pellets, highlighting a potential advantage of PVC370 in industrial applications. Moreover, the metallization ratio of PVC370-bearing pellets exceeded that of anthracite-bearing pellets before reaching 1150 °C. At a temperature of 1100 °C and a C/O of 0.8, the metallization ratio of PVC370-bearing pellets peaked at 83.17 %. During the reduction process of PVC370-bearing pellets, hydrogen (H2), carbon monoxide (CO), and hydrogen chloride (HCl) were efficiently released at relatively low temperatures. The efficiency of gas release in the reduction process could be attributed to certain factors, such as the composition or structure of the PVC370-bearing pellets. Notably, the quality of gasses generated during the reduction process of PVC370-bearing pellets is superior to that of anthracite-bearing pellets, even when considering chlorine content.

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来源期刊
Thermochimica Acta
Thermochimica Acta 化学-分析化学
CiteScore
6.50
自引率
8.60%
发文量
210
审稿时长
40 days
期刊介绍: Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application. The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta. The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas: - New and improved instrumentation and methods - Thermal properties and behavior of materials - Kinetics of thermally stimulated processes
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