Horizontal magnesium slag decarbonization device

The utility model relates to the technical field of decarbonization devices, in particular to a horizontal magnesium slag decarbonization device. According to the technical scheme, the device comprises a transverse plate, a furnace body and a recovery mechanism, the recovery mechanism comprises a heat exchange box, coiled heat exchange pipes are installed in the heat exchange box at equal intervals, a through conveying pipe is fixedly installed on one side of the heat exchange box, a dust removal box in through connection is fixedly installed at one end of the conveying pipe, and two sets of filter plates are fixedly installed in the dust removal box. Hot air in the dust removal box can be filtered through the filter plate, environmental pollution caused by the fact that air containing dust and impurities diffuses to the outside is avoided, the hot air after dust removal can be conveyed into the heat exchange box through the conveying pipe, temperature exchange is directly conducted through the hot air and th