The utility model provides a directly reduced iron's of iron content solid waste production shrend device is handled the rotary hearth furnace, including rotary hearth furnace, punching device, hot DRI elephant trunk, hot -tub, the distributor of connecting rotary hearth furnace and punching device, a conveyor who lies in the distributor top, horizontal cylindric centrifugal dehydration ware, the storage bin who lies in conveyor output below, cooling water pool etc, a distributor and a conveyor all are arranged in the section of thick bamboo cavity of horizontal cylindric centrifugal dehydration ware, the entrance that hot DRI elephant trunk got into the punching device is equipped with the high -pressure cooling water spout of connecting the cooling water pool to to the directly reduced iron's of rotary hearth furnace production cooling, in order finally to satisfy for the electric steelmaking requirement that directly reduced iron made the cooling agent.