发明名称 |
METHOD AND APPARATUS FOR REFINING GLASS USING A LOW PRESSURE |
摘要 |
<p>Method and apparatus are provided for refining glassy material or the like by vacuum. The material is first melted and then introduced into a vacuum chamber, preferably into space above liquid held in the chamber. Other aspects involve a two-step melting process preparatory to the vacuum refining, in which the material is initially liquefied in one stage and dissolution of particles is substantially completed in a second stage. The molten material is preferably foamed immediately upon entry into the vacuum chamber.</p> |
申请公布号 |
NZ218512(A) |
申请公布日期 |
1989.05.29 |
申请号 |
NZ19860218512 |
申请日期 |
1986.12.04 |
申请人 |
PPG INDUSTRIES INC |
发明人 |
KUNKLE, G E;WELTON, W M;SCHWENNINGER, R L |
分类号 |
C03B3/00;C03B3/02;C03B5/00;C03B5/04;C03B5/14;C03B5/225;C03C3/078;C03C3/087;(IPC1-7):C03B5/225 |
主分类号 |
C03B3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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