Lead Extraction from Cathode Ray Tube (CRT) Funnel Glass: Reaction Mechanisms in Thermal Reduction with Addition of Carbon (C).
Waste Management(2018)
Guangdong Univ Technol | School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control | School of Environment | Cent Taiwan Univ Sci & Technol | Univ Hong Kong | Department of Civil Engineering
Abstract
This study quantitatively determined the extraction of lead from CRT funnel glass and examined the mechanisms of thermally reducing lead in the products of sintering Pb-glass with carbon in the preheated furnace. The experimentally derived results indicate that a 90.3 wt% lead extraction efficiency can be achieved with 20 wt% of C addition at 950 degrees C for 3 min under air. The formation of viscous semi-liquid glass blocked the oxygen supply between the interaction of C and Pb-glass, and was highly effective for the extraction of metallic Pb. A maximum of 87.3% lead recover was obtained with a C to Na2CO3 ratio of 1/3 at 1200 degrees C. The decrease of C/Na2CO3 ratio enhanced the metallic lead recovery by increasing the glass viscosity for effective sedimentation of metallic lead in the bottom. However, with the further increase of temperature and treatment time, re-vitrification of lead back to silicate-glass matrix was detected in both Pb-glass/C and Pb-glass/C/Na2CO3 systems. The findings indicated that with proper controls, using C as an inexpensive reagent can effectively reduce treatment time and energy, which is crucial to a waste-to-resource technology for economically recovering lead from the waste CRT glass. (C) 2018 Elsevier Ltd. All rights reserved.
MoreTranslated text
Key words
Cathode Ray Tube (CRT),Funnel glass,Thermal reduction,Quantitative X-ray diffraction,Lead recovery
PDF
View via Publisher
AI Read Science
Must-Reading Tree
Example

Generate MRT to find the research sequence of this paper
Related Papers
Journal of building engineering 2020
被引用24
Journal of Material Cycles and Waste Management 2019
被引用4
Epitoanyag-Journal of Silicate Based and Composite Materials 2019
被引用7
Research Progresses on Recycling of Lead-containing Glass in Waste CRTs
Guangdong Chemical Industry 2019
被引用0
Chemical–Electrochemical Process Concept for Lead Recovery from Waste Cathode Ray Tube Glass
Materials 2021
被引用9
Research Progress on Recycling Technology of Lead-containing Glass in Waste Cathode Ray Tubes
IOP Conference Series Earth and Environmental Science 2020
被引用6
IOP Conference Series Earth and Environmental Science 2020
被引用0
Lead Recovery from Waste CRT Funnel Glass by Mechanochemical Reaction with Reductive Al Powder.
WASTE MANAGEMENT 2023
被引用0
Journal of Sustainable Metallurgy 2024
被引用0
Data Disclaimer
The page data are from open Internet sources, cooperative publishers and automatic analysis results through AI technology. We do not make any commitments and guarantees for the validity, accuracy, correctness, reliability, completeness and timeliness of the page data. If you have any questions, please contact us by email: report@aminer.cn
Chat Paper
GPU is busy, summary generation fails
Rerequest