2 results
Search Results
Now showing 1 - 2 of 2
- ItemDiagnosis and treatment of bubbles in glass production using a numerical Simulator(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1999) Kawachi, Shinji; Iwatsubo, YoshioΑ methodology to evaluate the bubble removing Performance of a tank furnace was proposed in previous papers. Since the operating data of the furnace being used for actual production can be udlized to examine the effectiveness of the above proposal, this paper deals with the verification issue when this methodology is applied to a real furnace. Additionally, various indirect indices, which have been advocated to evaluate the bubble removing Performance, are compared with the proposed direct Simulation. The results show that the phenomena experienced in the factory can be clearly explained and the direct Simulation has been proved to be very useful to diagnose and to treat bubbles during actual producdon.
- ItemEvaluation of reaction rate of refining agents(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1999) Kawachi, Shinji; Kato, Mitsuo; Kawase, YoshinoriTo elucidate the thermal decomposition behavior of antimony oxide which is added to promote (re)fming of bubbles in TV glass, an evolved gas analysis (EGA) was conducted using a newly designed device for detecting the gases from the glass batch at increasing temperatures. Furthermore, a mathematical formulation was made to describe the above behavior. From the results of the EGA measurements, three parameters, which govern the reaction rate constant, viz. reaction order, activation energy and frequency factor, were decided. By coupling this mathematical model and the thermal fluid model of glass melts in tank furnaces, it is possible to simulate the conditions of generating refming oxygen in the furnace.