In present,the wet-based pattern is mainly adopted to deal with the steel slag by steel plant at home and abroad,the wet-based technology has some defects;Wasting of water,pollution of the environment,and the slag has not been fully recycled.This paper presents a new method,which is aimed to realize dry granulation,waste heat recovery and comprehensive utilizing the steel slag.According to the ideas of wind quenching granulation,the heating slag from the converter furnace,was bring to the granulation heat exchange system,through the process of breaking in a container,the granulation heat exchange system has the functions of feeding continuously and heat exchange.The heat air,through the diversion tubes,could be recycled in removing the dust.The granulation slag could be bring to a confined roller,granulating and cooling secondarily.The roller export was connected to a magnetic separator.The separated iron could be recycled,and the remaining slag could also be reused as building materials,in process of stabilization and secondary magnetic separation.The heated air could be guided into the boiler to generate the steam,which can be used to generate electricity,or use as cleaned energy,realizing the target to recycle the waste heat in steel slag.The highlights of the new method are dry granulation and waste heat recovery.This paper states the process of heat exchange between the air and the steel slag in the system of granulation heat exchange in the new technical process.In theory,it has been proved reasonable with the the system of granulation heat exchange,and also the work conditions has been optimized. In present, the wet-based pattern is mainly adopted to deal with the steel slag by steel plant at home and abroad, the wet-based technology has some defects; Wasting of water, pollution of the environment, and the slag has not been fully This paper presents a new method, which is aimed at realizing dry granulation, waste heat recovery and comprehensive utilizing the steel slag. According to the ideas of wind quenching granulation, the heating slag from the converter furnace, was brought to the granulation heat exchange system, through the process of breaking in a container, the granulation heat exchange system has the functions of feeding continuously and heat exchange. the heat air, through the diversion tubes, could be recycled in the dust. the granulation slag could be bring to a confined roller, granulating and cooling secondarily.The roller export was connected to a magnetic separator. The separated iron could be recycled, and the remaining slag could also be reused as building materia ls, in process of stabilization and secondary magnetic separation. heated the could could be incorporated into the boiler to generate the steam, which can be used to generate electricity, or use as cleaned energy, realizing the target to recycle the waste heat in steel slag . The highlights of the new method are dry granulation and waste heat recovery. This paper states the process of heat exchange between the air and the steel slag in the system of granulation heat exchange in the new technical process. Theory, it has been proven reasonable with the system of granulation heat exchange, and also the work conditions has been optimized.