CONTINUOUS HEAT TREATMENT APPARATUS

• Main Authors: KOMATSUBARA KENTA, ONOE JUNICHI, FUJIOKA YASUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 02.07.2024
• Subjects: BLASTING; CHEMISTRY; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HEATING; KILNS; LIGHTING; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; OPEN SINTERING OR LIKE APPARATUS; OVENS; RETORTS; WEAPONS

To effectively remove water vapor generated from a nitrate bath in a chute space in a continuous heat treatment apparatus.SOLUTION: A continuous heat treatment apparatus 1 includes a heating furnace 3, a dropping chute device 4 for dropping a metal member heat-treated in the heating furnace 3, and a nitrate bath 6 into which the metal member is fed by the dropping chute device 4. The dropping chute device 4 has a peripheral wall 41 forming a chute space extending in the vertical direction, a gas supply part 42 for supplying inert gas so as to generate a flow of the inert gas crossing the chute space in the horizontal direction, and a gas discharge part 43 for sucking and exhausting the gas in the chute space. The gas supply part 42 has two or more branch passages 425 on the downstream side, branched from the upstream passage 421 and each communicating with the chute space, and each of the two or more branch passages 425 is formed so as to have a width in the horizontal direction spreading along the flow direction of the inert gas.SELECTED DRAWING: Figure 4 【課題】連続式熱処理装置において、硝酸塩浴から発生する水蒸気をシュート空間内において効果的に除去する。【解決手段】連続式熱処理装置１は、加熱炉３と、加熱炉３で加熱処理された金属部材を投下する投下シュート装置４と、投下シュート装置４により金属部材が投入される硝酸塩浴槽６と、を有し、投下シュート装置４は、鉛直方向に延びるシュート空間を形成する周壁４１と、シュート空間を水平方向に横断する不活性ガスの流れを生じさせるように、不活性ガスを供給するガス供給部４２と、シュート空間内のガスを吸引排気するガス排出部４３と、を有し、ガス供給部４２は、上流側通路４２１から分岐した下流側通路であって、各々がシュート空間内に連通する２以上の分岐通路４２５と、を有し、２以上の分岐通路４２５の各々は、水平方向の幅が不活性ガスの流れ方向に沿って広がるように形成されている。【選択図】図４