Effect of temperature in carbothermic reduction of indonesian limonite ore using printed circuit boards as reducing agent

Reza Miftahul Ulum, Andy Kurnia Wicaksana, Faizinal Abidin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In recent years, there have been increases in the production of electronic waste, such as Printed Circuit Board (PCB), because of the rapid advancement of technology. PCBs are highly valuable, as they contain metals such as copper, silver, and gold. This research aims to investigate the feasibility of using PCB, discarded from laptops as the reducing agent for the carbothermic reduction process of Indonesian limonite ore and the effect of temperature on the carbothermic reduction process, specifically on the phase transformation and the differences in microstructure. Based on the TGA-DSC result, the mixture of limonite and PCB have three endothermic peaks at 90°C, 290 °C, 450 °C and one exothermic peak at 910 °C, whereas the mixture of limonite and coal has the same trends but the exothermic peak occurs at 1070 °C. To investigate the effect of PCB powder on the reduction of limonite ore, a carbothermic reduction experiment was carried out through the mixing of 8.0 g of limonite ore with 2.0 g of PCB powder (20 wt.%), which was then further compacted. The experiment was carried out at temperature variations of 700 °C, 900 °C, 1100 °C for 1 hour in an inert atmosphere furnace. The products of the reduction process were magnetically separated and then characterized using SEM/EDS and XRD to evaluate the differences in microstructure. This research found that PCB powder is a feasible reducing agent for the reduction of limonite ore.

Original languageEnglish
Title of host publicationMaterial Engineering and Manufacturing III
EditorsTakashige Omatsu, Hongqi Sun
PublisherTrans Tech Publications Ltd
Pages155-161
Number of pages7
ISBN (Print)9783035716887
DOIs
Publication statusPublished - 2020
Event4th International Conference on Material Engineering and Manufacturing, ICMEM 2020, the 3rd International Conference on Materials Design and Applications, ICMDA 2020, and the 2nd International Conference on Biomacromolecules and Biomimetic Materials, ICBBM 2020 - Tokyo, Japan
Duration: 10 Apr 202013 Apr 2020

Publication series

NameMaterials Science Forum
Volume1009 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference4th International Conference on Material Engineering and Manufacturing, ICMEM 2020, the 3rd International Conference on Materials Design and Applications, ICMDA 2020, and the 2nd International Conference on Biomacromolecules and Biomimetic Materials, ICBBM 2020
Country/TerritoryJapan
CityTokyo
Period10/04/2013/04/20

Keywords

  • Carbothermic reduction
  • Limonite
  • PCB powder
  • TGA-DSC analysis

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