Half-wet method slag processing system and method

The invention discloses half-wet method slag processing system and method, wherein the half-wet method slag processing system comprises a slag storage bin, a high-pressure atomizing nozzle and a crushing device with high-speed revolution, wherein the upper part of the slag storage bin is provided with a high-temperature liquid slag inlet which is connected with a slag outlet of a blast furnace; the high-pressure atomizing nozzle and the crushing device are arranged in the slag storage bin and positioned below the high-temperature liquid slag inlet; the high-pressure atomizing nozzle sprays high-pressure aerial fog towards the crushing device to impact and cool the liquid slag of the blast furnace; and the crushing device is used to further mechanically crush and cool the slag and process the slag into materials for preparing cement. The invention overcomes the defects of the high use level and the waste of water resources, difficult heat energy recovery and the high cost of the reprocessing of slag secondary products in the traditional slag processing method.