Heat treatment system

A heat treatment system comprising:

• a heat treatment furnace including an entrance and an exit, and configured to heat treat a material in a saggar while the saggar is conveyed from the entrance to the exit, the saggar including a saggar body and a lid removably attached to the saggar body;
• a lid removing device configured to remove the lid from the saggar that exited from the exit of the heat treatment furnace;
• a body conveyor configured to convey the saggar body from which the lid has been removed by the lid removing device;
• a lid conveyor configured to convey the lid removed by the lid removing device;
• a recovery device disposed on a conveying path of the body conveyor and configured to recover the material heat-treated in the heat treatment furnace from the saggar body;
• a supply device disposed on the conveying path of the body conveyor and downstream of the recovery device, and configured to supply a non-heat-treated material to the saggar body in which the material is not accommodated;
• and
• a lid attaching device configured to attach a lid conveyed by the lid conveyor to a saggar body in which the non-heat-treated material has been supplied while the saggar body is conveyed by the body conveyor,
• wherein
• a conveying time for the lid to be conveyed from an entrance of a conveying path of the lid conveyor located close to the lid removing device to an exit of the conveying path of the lid conveyor located close to the lid attaching device is shorter than a conveying time for the saggar body to be conveyed from an entrance of the conveying path of the body conveyor located close to the lid removing device to an exit of the conveying path of the body conveyor located close to the lid attaching device.