The blast furnace (BF) slag produced in the iron and steel smelting process contains abundant waste heat resources. The centrifugal granulation waste heat recovery technology is considered to be the most promising BF slag treatment process. In this paper, a granulation cabin structure is proposed to inhibit particles bonding, and the effects of initial slag temperature, cooling air flow rate and rotating speed on waste heat recovery are discussed. The results show that the waste heat recovery rate can be improved by increasing initial slag temperature and cooling air flow rate. At the same time, 1800 rpm is the suitable rotating speed for waste heat recovery.
Keywords blast furnace slag, molten slag, centrifugal granulation, waste heat recovery