To provide a heat treatment apparatus which can be used for heat treatment of granular bodies and heating treatment of heating targets other than granular bodies. SOLUTION: A heat treatment apparatus main body 2 having a convection type heat treatment section and a granular body heat treatment drum 3 are combined. In the operation panel 5 of the heat treatment apparatus main body 2, setting of the inside temperature, switching of the upper and lower heating elements, connection / disconnection of the convection type heat treatment section fan, timer setting, connection and disconnection of the built-in motor are performed. The granular body heat treatment drum 3 is detachable with respect to the heat treatment apparatus main body 2. In a state where it is attached to the heat treatment apparatus main body, the granular body heat treatment drum 3 rotates at a constant number of revolutions by the built-in motor of the heat treatment apparatus main body, Agitate the granules with stirring blades. The granular material heat treatment drum and the stirring blade are made of reticulated material, the stirring blade is hollow and can be brought into contact with the granular body without hindering heat rays and hot air from the convection type heat treatment section. The granular material undergoing the heat treatment can be visually observed through the heat resistant glass front door of the heat treatment apparatus main body and the progress of the heat treatment can be grasped from time to time. BACKGROUND OF THE INVENTION【課題】粒状体の加熱処理と粒状体以外の加熱対象の加熱処理に両用できる加熱処理装置を提供する。【解決手段】対流式加熱処理部を持つ加熱処理装置本体2と粒状体加熱処理ドラム3を組み合わせる。加熱処理装置本体2の操作盤5では庫内温度の設定、上部及び下部発熱体の切り替え、対流式加熱処部用ファンの接・断、タイマー設定、及び内蔵モーターの接・断を行う。粒状体加熱処理ドラム3は加熱処理装置本体2に対し着脱自在であり、加熱処理装置本体に取り付けた状態では加熱処理装置本体の内蔵モーターにより一定の回転数で回転し粒状体加熱処理ドラム内部の攪拌羽根により粒状体を撹拌する。粒状体加熱処理ドラムと攪拌羽根は網状の材料で製造し、撹拌羽根は中空の立体とし、対流式加熱処理部からの熱線と熱風を妨げず粒状体に当て得る。加熱処理中の粒状体を加熱処理装置本体の耐熱ガラス製前面扉を通して目視でき、加熱処理の進み具合を随時把握することができる。【選択図】図1
