高爐羽口に就て
スポンサーリンク
概要
- 論文の詳細を見る
Every blast furnace man desires to avoid of the break-out from the blast furnace if possible, because it spoils a great deal of furnace conditions and may accompany sometimes dangerous to men. It is a very popular fact that at the tip of an inhaler, owing to a strong flow of steam, there occurs a pretty powerful depression, by which a volume of water in a vessel put-down-ward, can easily be sucked up. A similar phenomenon may occur, too, at the tuyre end in blast as everyman can easily understand. In the latter case, however, instead of water, some highly heated molten materi-als will be drawn up or from the other point of view, they will attack against a tuyre tip, where a depression occurs, and bring this at last to break. The stronger the blast, the more mighty the depression, and an impinging action will become more effective. It is able to say therefore that the blast is a powerful destroger of tuyres. Naturally almost all part of blast blown in, flows directly upward along its upper lip and not any along the lower part. This upward flow serves to disturb or weeken the depression and to blow about, too, molten materials comming to tuyres, but on the contrary not any at the lower. Thus it will be able to explain why breakouts occur mostly, as every man see, at their lower lips. Intending to avoid the partial up-ward fllow of the [figure] blast and disperse it for all directions, the tuyre end is cut on the bias as shown on a sketch. With the new form the lower end being shorter, a flow begines earlier from the point "b" and naturally this flow takes its way somewhat down-ward. An inclination "α" has duty to keep always the direction of the tuyre and the flow, too, downward, even such a case that the tuyre will be thrusted up by growing up of the breastwall very possible by heat. The following comparison tells us how much the improved tuyre gave a good result. [table] On sep. 26^<th>. 1926 all tuyeres were changed with the new forms and after that the breckout has reduced to one-sixth while the production increased to 111.5% having compared with the last four mouths.
- 社団法人日本鉄鋼協会の論文
- 1932-10-25