skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Energy-efficient modification of reduction-melting for lead recovery from cathode ray tube funnel glass

Abstract

Highlights: • We recovered Pb from cathode ray tube funnel glass using reduction melting process. • We modified the melting process to achieve Pb recovery with low energy consumption. • Pb in the funnel glass is efficiently recovered at 1000 °C by adding Na{sub 2}CO{sub 3}. • Pb remaining in the glass after reduction melting is extracted with 1 M HCl. • 98% of Pb in the funnel glass was recovered by reduction melting and HCl leaching. - Abstract: Lead can be recovered from funnel glass of waste cathode ray tubes via reduction melting. While low-temperature melting is necessary for reduced energy consumption, previously proposed methods required high melting temperatures (1400 °C) for the reduction melting. In this study, the reduction melting of the funnel glass was performed at 900–1000 °C using a lab-scale reactor with varying concentrations of Na{sub 2}CO{sub 3} at different melting temperatures and melting times. The optimum Na{sub 2}CO{sub 3} dosage and melting temperature for efficient lead recovery was 0.5 g per 1 g of the funnel glass and 1000 °C respectively. By the reduction melting with the mentioned conditions, 92% of the lead in the funnel glass was recovered in 60 min. However, further leadmore » recovery was difficult because the rate of the lead recovery decreased as with the recovery of increasing quantity of the lead from the glass. Thus, the lead remaining in the glass after the reduction melting was extracted with 1 M HCl, and the lead recovery improved to 98%.« less

Authors:
;
Publication Date:
OSTI Identifier:
22300375
Resource Type:
Journal Article
Journal Name:
Waste Management
Additional Journal Information:
Journal Volume: 33; Journal Issue: 8; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0956-053X
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; CATHODE RAY TUBES; CONCENTRATION RATIO; ENERGY CONSUMPTION; ENERGY EFFICIENCY; GLASS; HYDROCHLORIC ACID; LEACHING; LEAD; MATERIALS RECOVERY; MELTING; MELTING POINTS; SODIUM CARBONATES; TEMPERATURE RANGE 0065-0273 K; WASTES

Citation Formats

Okada, Takashi, and Yonezawa, Susumu. Energy-efficient modification of reduction-melting for lead recovery from cathode ray tube funnel glass. United States: N. p., 2013. Web. doi:10.1016/J.WASMAN.2013.04.009.
Okada, Takashi, & Yonezawa, Susumu. Energy-efficient modification of reduction-melting for lead recovery from cathode ray tube funnel glass. United States. https://doi.org/10.1016/J.WASMAN.2013.04.009
Okada, Takashi, and Yonezawa, Susumu. 2013. "Energy-efficient modification of reduction-melting for lead recovery from cathode ray tube funnel glass". United States. https://doi.org/10.1016/J.WASMAN.2013.04.009.
@article{osti_22300375,
title = {Energy-efficient modification of reduction-melting for lead recovery from cathode ray tube funnel glass},
author = {Okada, Takashi and Yonezawa, Susumu},
abstractNote = {Highlights: • We recovered Pb from cathode ray tube funnel glass using reduction melting process. • We modified the melting process to achieve Pb recovery with low energy consumption. • Pb in the funnel glass is efficiently recovered at 1000 °C by adding Na{sub 2}CO{sub 3}. • Pb remaining in the glass after reduction melting is extracted with 1 M HCl. • 98% of Pb in the funnel glass was recovered by reduction melting and HCl leaching. - Abstract: Lead can be recovered from funnel glass of waste cathode ray tubes via reduction melting. While low-temperature melting is necessary for reduced energy consumption, previously proposed methods required high melting temperatures (1400 °C) for the reduction melting. In this study, the reduction melting of the funnel glass was performed at 900–1000 °C using a lab-scale reactor with varying concentrations of Na{sub 2}CO{sub 3} at different melting temperatures and melting times. The optimum Na{sub 2}CO{sub 3} dosage and melting temperature for efficient lead recovery was 0.5 g per 1 g of the funnel glass and 1000 °C respectively. By the reduction melting with the mentioned conditions, 92% of the lead in the funnel glass was recovered in 60 min. However, further lead recovery was difficult because the rate of the lead recovery decreased as with the recovery of increasing quantity of the lead from the glass. Thus, the lead remaining in the glass after the reduction melting was extracted with 1 M HCl, and the lead recovery improved to 98%.},
doi = {10.1016/J.WASMAN.2013.04.009},
url = {https://www.osti.gov/biblio/22300375}, journal = {Waste Management},
issn = {0956-053X},
number = 8,
volume = 33,
place = {United States},
year = {Thu Aug 15 00:00:00 EDT 2013},
month = {Thu Aug 15 00:00:00 EDT 2013}
}