As a utility model equipment, the treatment system for granulated slag of blast furnace consists of slag-flushing pumps, granulating pit, cleaning device, filter, water tank, and suction well, with such features: a horizontal flow basin is arranged behind the filter, and a clamshell crown block is arranged above the horizontal flow basin and the water tank. This utility model equipment can carry out secondary filtering of the filtered water after slag-water separation, to make the slag wool in the filtered water deposited fully, so that the cleanness of the filtered water is greatly impfoved, and the water quality of the recycling water is improved, and the service life of slag¬flushing pumps and pipes is prolonged.
