PLASMA TORCH, TIP ELECTRODE FOR PLASMA TORCH, AND MOLTEN METAL HEATING DEVICE

• Main Authors: MAEKAWA HIRONORI, MIURA YASUAKI
• Format: Patent
• Language: English; Japanese
• Published: 20.09.2018
• Subjects: BLASTING; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; OPEN SINTERING OR LIKE APPARATUS; OVENS; PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS; RETORTS; WEAPONS

PROBLEM TO BE SOLVED: To extend the life of a plasma torch.SOLUTION: A plasma torch 10 is used to generate plasma P between itself and molten metal M inside a tundish having: a main body for storing the molten metal M; and a lid 102b covering an opening of the main body which is opened upward. The plasma torch 10 comprises: a metal main body 18 which can be inserted through a through-hole 102d provided on the lid 102b so that a lower end part 18a, directed toward the molten metal M during heating of the molten metal M by the plasma P, may be located inside the tundish; and a graphite tip electrode 20 fitted to the lower end part 18a of the main body 18.SELECTED DRAWING: Figure 2 【課題】プラズマトーチの長寿命化を図る。【解決手段】プラズマトーチ１０は、溶湯Ｍを貯留する本体と、上方に向けて開放された本体の開口部を覆う蓋１０２ｂとを備えるタンディッシュ内で溶湯Ｍとの間でプラズマＰを発生させるために用いられる。プラズマトーチ１０は、プラズマＰによる溶湯Ｍの加熱処理時に溶湯Ｍに向かう下端部１８ａがタンディッシュ内に位置するように、蓋１０２ｂに設けられた貫通孔１０２ｄ内に挿通可能に構成された金属製の本体１８と、本体１８の下端部１８ａに取り付けられた黒鉛製の先端電極２０とを備える。【選択図】図２