公开(公告)号：EP0231518A3

公开(公告)日：1988-01-13

申请号：EP86118053

申请日：1986-12-24

Applicant: PPG INDUSTRIES, INC.

Inventor： Kunkle, Gerald Erasmus ,  Welton, Wright Montgomery ,  Schwenninger, Ronald Lee

IPC: C03B05/00 ,  C03B05/225 ,  C03B03/00 ,  C03B05/14 ,  C03B05/04 ,  C03C03/078 ,  C03C03/087 ,  C03C01/00

CPC classification number: C03B3/02 ,  C03B5/00 ,  C03B5/04 ,  C03B5/14 ,  C03B5/2252 ,  C03C3/078 ,  C03C3/087 ,  Y02P40/57

Abstract: Method and apparatus are provided for refining glassy material (51) or the like by vacuum. The material (51) is first melted and then introduced into a vacuum chamber (12), preferably into space above liquid (51) held in the chamber (12). Other aspects involve a two-step melting process preparatory to the vacuum refining, in which the material is initially liquefied in one stage (10) and dissolution of particles is substantially completed in a second stage (11). The molten material (51) is preferably foamed (50) immediately upon entry into the vacuum chamber (12).

公开(公告)号：EP0143427A3

公开(公告)日：1985-07-03

申请号：EP84114057

申请日：1984-11-21

Applicant: PPG INDUSTRIES, INC.

Inventor： Heithoff, Robert Bernard

IPC: C03B05/235 ,  C03B05/14

CPC classification number: C03B5/235 ,  C03B5/14 ,  C03B5/2353 ,  Y02P40/55 ,  Y02P40/57

Abstract: Process control method and apparatus for an ablation liquefaction chamber including primary and secondary burners positioned to direct a primary combustion flame for electively heating portions of the chamber interior for control of product temperature and chamber pessure.

公开(公告)号：EP0071110A3

公开(公告)日：1983-08-31

申请号：EP82106404

申请日：1982-07-16

Applicant: PPG INDUSTRIES, INC.

Inventor： Kunkle, Gerald Erasmus ,  Matesa, Joseph Michael

IPC: C03B03/00 ,  C03B05/12 ,  C03B05/14 ,  C03B05/235 ,  C03B05/16 ,  C03B05/033

CPC classification number: C03B5/14 ,  C03B3/02 ,  Y02P40/57

Abstract: In a method of liquefying glass batch the initial step of melting glass, converting particulate batch materials to a partially melted, liquefied state, is carried out on a support surface of batch. As liquefied batch is drained from the surface, additional batch is fed onto the surface to maintain the volume of the stable mass of batch substantially constant.