キュポラの出湯成分に対する湯だまり部構造の影響
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概要
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In the previous work by the authors, fluctuations in iron compositions and methods of their stabilization in cupola melting were investigated, and the phenomenon of composition fluctuations was analyzed by introducing a frequency response method. It was clarified, in that analysis, that a large mixing vessel of iron, i.e., a large capaicty of bottom well was effective in stabilizing iron compositions. However, in cupolas with a front slagging system a large bottom well had little effect upon the stabilization of iron of iron compositions, since only a part of the botton well acted as a mixing vessel. In this study, a rear slagging system was applied to cupola melting and attempted to stabilize the iron compositions by enlarging the capacity of the bottom well. The rear slagging system was applied to a cupola of about 1.8t/hr melting rate and two kinds of depth for the cupola bottom well was used, to find out the optimum rear slagging system. A bottom well with rear slagging system that was 200mm deeper than the front slagging system and a capacity of about one tenth of the hourly melting rate was confirmed to be effective in stabilizing iron compositions without decreasing the iron temperature. The standard deviation of the carbon content in iron was 0.06-0.07% and that of silicon content was 0.05-0.07%. The effect on decreasing fluctuations of silicon content was especially remarkable. In the deeper bottom well. with a rear slagging system, carbon pickup was enhanced and the standard deviation of carbon content decreased to 0.045-0.06%, but the iron temperature decreased considerably.
- 日本鋳造工学会の論文
日本鋳造工学会 | 論文
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