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ID 14730
Eprint ID
14730
FullText URL
Title Alternative
Material recycling of blast furnace slag by phase separation of glass
Author
Mikami, Syuuhei
Miura, Yoshinari
Abstract
A novel recycling process of blast furnace slag was developed in order to obtain colorless silica-rich solids by using phase separation of borosilicate glass. B(2)O(3) was added to blast furnace slag to promote the phase separation. The slag glasses were heat-treated above glass transition temperatures. The slag glass prepared from blast furnace slag gelled after the heat treatment and the subsequent three types of acid treatment. The ratios of SiO(2) component in the gels were 40 – 60mass%. On the other hand, phase separation was observed on the surface of the slag glasses prepared from pre-treated slag by 2.5N HCl after the heat treatment. After soaking in acid, they did not gel and changed to insoluble colorless solids. According to compositional analyses, it was found that the insoluble colorless solids contained 70 - 90mass% SiO(2). No colored ions such as Cr, Mn, and Fe were confirmed in the remaining insolubles by optical absorption measurement. Therefore, the colorless silica-rich solids were successfully obtained in the present process. The end products obtained in the present process are expected as material of glass.
Keywords
Blast furnace slag
Recycling
Colorless silica-rich solids
Phase separation
Glass
Note
論文
Published Date
2007-10
Publication Title
環境制御
Publication Title Alternative
Environmental research & control
Volume
volume29
Publisher
岡山大学環境管理センター
Publisher Alternative
Environmental Management Center, Okayama University
Start Page
11
End Page
15
ISSN
0917-1533
NCID
AN1024789X
Content Type
Journal Article
language
日本語
File Version
publisher
Refereed
True
Eprints Journal Name
erc