Steel slag filtering equipment and filtering method

The invention discloses steel slag filtering equipment and a filtering method.The equipment comprises a rack, at least one steel slag outer cylinder arranged on the rack and at least one steel slag filtering tank arranged in the steel slag outer cylinder, and a raw slag pool and a sludge pool are arranged on the rack; a draining rack for supporting one or more steel slag filtering tanks to drain water is arranged on the raw slag pool and/or the sludge pool; the hoisting part is arranged on the rack and is used for hoisting the steel slag filtering tank; the grabbing part is used for grabbing and putting a steel slag filtering material in a raw slag pool into the steel slag filtering tank; wherein the steel slag outer cylinder is provided with a water circulation system, and the water circulation system is used for enabling liquid to flow into the steel slag filtering tank from the steel slag outer cylinder, and discharging the liquid after the liquid is filtered by a steel slag filtering material in the steel