CRUCIBLE TYPE INDUCTION FURNACE

• Main Authors: HAGA DAISUKE, IWAMOTO TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 28.04.2023
• 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 HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; 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; RETORTS; WEAPONS

To provide a practical crucible type induction furnace capable of effectively preventing the expansion (particularly, vertical expansion) of a melting chamber upon use caused by heat and elongating the furnace reconstruction and exchange of the melting chamber.SOLUTION: A crucible type induction furnace 1 comprises: a melting chamber 2 made of a sleeve as a shaped refractory and an inner bottom material as an unshaped refractory; a holding plate 3; a furnace bottom refractory material 4; a back material layer 5; a heating coil 19 as heating means; an iron core 6; and a furnace frame 7 functioning as a housing or the like. Then, the holding plate 3 for suppressing the expansion of the melting chamber 2 is detachably fastened to the furnace frame 7 in a state of covering the wall upper face of the melting chamber 2. The holding plate 3 is rectangularly formed by a mold, and slits 12, 12 for preventing the damage caused by the expansion of the melting chamber 2 are provided.SELECTED DRAWING: Figure 1 【課題】使用時の溶解室の熱による膨張（特に上下方向の膨張）を効果的に防止して、溶解室の再築炉や交換の周期を長くすることが可能で実用的なるつぼ型誘導炉を提供する。【解決手段】るつぼ型誘導炉１は、定形耐火物であるスリーブと不定形耐火物である内底材からなる溶解室２、押え板３、炉底耐火材４、バック材層５、加熱手段である加熱コイル１９、鉄心６、ハウジングとして機能する炉枠７等によって構成されている。そして、溶解室２の膨張を抑制するための押え板３が、溶解室２の壁上面を覆った状態で着脱自在に炉枠７に固着されている。当該押え板３は、鋳物によって矩形状に形成されており、溶解室２の膨張による破損を防止するためのスリット１２，１２・・が設けられている。【選択図】図１