Recycling Carbonaceous Industrial/Commercial Waste as a Carbon Resource in Iron and Steelmaking

摘要

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Carbon bearing industrial/commercial waste is difficult to recycle and a significant fraction is generally landfilled. With an aim to utilize such waste as carbon resources for iron and steelmaking, high temperature pyrolysis investigations are carried out on three waste polymers: waste CDs (compact discs), carbon fiber reinforced polymers (CFRPs), and Bakelite. These materials are heat treated in the temperature range 1000–1550 °C for 15 min in argon atmosphere and are subsequently quenched. Detailed structural and compositional characterization is carried out on recovered chars using a variety of analytical techniques: LECO, X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Raman spectroscopy, and BET surface area measurements. Significant differences are observed in various chars recovered from these three waste polymers under investigation. With carbon contents in chars from 65 to 98%, surface areas from 2.2 to 274 m 2 g −1 and structural order from amorphous to graphitic, these chars present a wide spectrum of carbon characteristics. These properties are evaluated toward their utilization during lower temperature carburization of iron.