Dry-method treatment and waste heat continuous utilization system for blast-furnace slag

The invention discloses a dry-method treatment and waste heat continuous utilization system for blast-furnace slag and belongs to the dry-method treatment and waste heat continuous utilization system in the iron-smelting industry. The dry-method treatment and waste heat continuous utilization system comprises a granulating heat exchange unit and a waste heat utilization unit, wherein the granulating heat exchange unit at least comprises a granulating and cooling device, a heat exchange device and a waste heat boiler device; the granulating and cooling device is communicated with the heat exchange device; the heat exchange device is communicated with the waste heat boiler device; the waste heat boiler device is communicated with the waste heat utilization unit; the granulating and cooling device is used for conveying the granulated and preliminarily-cooled blast-furnace slag to the heat exchange device for air current heat exchange; heat air current subjected to heat exchange enters the waste heat boiler device for generating steam; and the steam enters the waste heat utilization unit as power for doing work. According to the dry-method treatment and waste heat continuous utilization system disclosed by the invention, high-efficiency recycling of the blast-furnace slag with high temperature is realized, and the technical problem that the cooling speed and the waste heat recovering effect of the granulated furnace slag are required to be considered by a waste heat recycling technology of the blast-furnace slag treated by the dry-method granulation is solved.