Device and method for producing fused magnesia through furnace body down movement method

The invention relates to a device and method for producing fused magnesia through a furnace body down movement method. The device comprises a movement plate trailer, a furnace body and an electrode heating mechanism and is characterized by comprising a lifting platform and a furnace body lifting mechanism arranged at the lower part of the lifting platform, the furnace body is a combined furnace body composed of three or more split-type bottomless fire-resistant thermal insulation furnace bodies through axial assembling, each one of the furnace bodies comprises two halves of semicircular furnace walls which are divided along a radial direction, are butt-connected through a locking device and are fixedly connected through a pin along a longitudinal direction, the combined furnace body is located on the upper part of the movement plate trailer and the lifting platform, and the electrode heating mechanism is fixedly arranged on the upper part of the combined furnace body. The device and method have the advantages