Chemical recycling of municipal waste slag by using phase separation

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6 Citations (Scopus)

Abstract

A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B2O3 was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe2O3, K2O, and S. Transparent and colorless solids containing ca. 80 mass% of SiO2 were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes.

Original languageEnglish
Pages (from-to)1195-1198
Number of pages4
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume117
Issue number1371
Publication statusPublished - Nov 2009

Fingerprint

Ashes
slags
recycling
Phase separation
Slags
Recycling
ashes
incinerators
vitrification
Glass
Vitrification
Waste incineration
Hydrochloric Acid
glass
hydrochloric acid
leaching
Hydrochloric acid
glass transition temperature
Leaching
heat treatment

Keywords

  • Chemical recycling
  • Glass
  • Municipal waste slag
  • Phase separation
  • Waste recycling

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

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title = "Chemical recycling of municipal waste slag by using phase separation",
abstract = "A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B2O3 was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe2O3, K2O, and S. Transparent and colorless solids containing ca. 80 mass{\%} of SiO2 were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes.",
keywords = "Chemical recycling, Glass, Municipal waste slag, Phase separation, Waste recycling",
author = "Tokuro Nanba and Yutaro Kuroda and Shinichi Sakida and Yasuhiko Benino",
year = "2009",
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T1 - Chemical recycling of municipal waste slag by using phase separation

AU - Nanba, Tokuro

AU - Kuroda, Yutaro

AU - Sakida, Shinichi

AU - Benino, Yasuhiko

PY - 2009/11

Y1 - 2009/11

N2 - A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B2O3 was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe2O3, K2O, and S. Transparent and colorless solids containing ca. 80 mass% of SiO2 were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes.

AB - A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B2O3 was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe2O3, K2O, and S. Transparent and colorless solids containing ca. 80 mass% of SiO2 were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes.

KW - Chemical recycling

KW - Glass

KW - Municipal waste slag

KW - Phase separation

KW - Waste recycling

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