Production of Iron Nuggets from the Akpafu-Todzi Iron Ore and Artisanal Ferrous Slag using Post Consumer Thermosets (Waste Electrical Sockets) as Reductants

J. Dankwah, E. Baah, J. Dankwah, J. R. Dankwah, B. Agbenuvor, B. Amankwaa-Kyeremeh, P. Koshy
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Abstract

AbstractPost-consumer thermosets are difficult to recycle because, unlike thermoplastics, they cannot be remoulded to create other items as a result of the extensive cross-linkages in their structure. The increased production of thermoset blends and composites in recent years has greatly increased the amount of waste materials. However, higher levels of carbon and hydrogen present in thermosets make them a potential reductant in the iron extractive industries. In this research work, postconsumer thermoset was transformed into carbon resource through a charring process. The resulting carbonaceous material from the thermoset was used as reductant in the production of metallic iron from the Akpafu-Todzi iron ore and artisanal slag using the microwave technology through the composite pellet approach at varying firing times. Analyses by XRF, XRD and SEM/EDS showed that the Akpafu Todzi iron ore is comprised of the iron oxides hematite (Fe2O3) and wustite (Fe0.942O), while the artisanal slag was predominantly fayalite (Fe2SiO4). Complete reduction of the ore was attained after 120 min reduction but the maximum extent of reduction was 78.84% for the slag, demonstrating the potential of postconsumer thermosets to function effectively as a reductant in the iron extractive industry. Keywords: Reduction; Akpafu-Todzi Iron Ore; Post Consumer Thermosets; Waste Electrical Sockets
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用消费后热固性物(废弃电源插座)作为还原剂从Akpafu-Todzi铁矿和手工铁渣中生产铁块
摘要消费后热固性塑料很难回收,因为与热塑性塑料不同,它们不能被重塑以创建其他项目,因为它们的结构中存在广泛的交联。近年来热固性共混物和复合材料产量的增加大大增加了废料的数量。然而,热固性材料中较高的碳和氢含量使它们成为铁提取工业中潜在的还原剂。在本研究中,使用后热固性材料通过炭化过程转化为碳资源。将热固性炭质材料作为还原剂,通过复合球团法在不同烧成时间下用微波技术从Akpafu-Todzi铁矿和手工炉渣中生产金属铁。XRF、XRD和SEM/EDS分析表明,Akpafu Todzi铁矿主要由赤铁矿(Fe2O3)和浮士体(fe0.942)组成,手工渣主要为铁沸石(Fe2SiO4)。还原120分钟后,矿石完全还原,但炉渣的最大还原程度为78.84%,证明了消费后热固性物在铁提取工业中作为还原剂有效发挥作用的潜力。关键词:减少;阿克帕夫-托齐铁矿;后消费热固性;废弃电源插座
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