8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Acute crisis of water in the region compelled the usage of recycled water with high conductivity that helped in increasing granulation. However, usage of recycled water beyond 50% has resulted in undesired accretion in the Mixing and Nodulizing Drum. Magnetized water reduced contact angle and improved the granulation of green mix. The effect of magnetization of water was studied by varying magnetic intensity. Contact angle up to 32o was observed against a desired angle of 40-55o for optimum nodulization of the green mix. Conductivity up to 2650 Micro Siemens/sec was found against the normal value of 400. The optimization of contact angle and conductivity of recycled water to control coagulation was mentioned. Anti-coagulant was found to ease the problem, with which the contact angle could be increased to the desired level. The growth of the granules increased with the use of anti-coagulant. Granulation Index in the range of 1.7 could be sustained. Data of various combinations namely with recycled, without recycled water; with magnetization, without magnetization and with anti-coagulant and without anti-coagulant are presented in this paper. SEM images revealed strengthening of water bond with increasing conductivity. Ultra fines coagulated better with increasing magnetization. Growth was predominantly high with use of anti-coagulant.