The Hitvada reported that Steel Authority of India Limited’s Bhilai Steel Plant’s former General Manager Mr Ravi Rattan Kerketta has developed a new wet coke quenching process and that the invention is now in the final stage of grant of patent. The invention is revolutionary because for the first time the heat energy of steam during the wet coke quenching is gainfully utilized. Mr Kerketta has conceptualized and designed six main machines and equipment for the new wet quenching technique. In the new technique, the hot coke is pushed through a specially designed pushing system into a coke transfer car in a completely closed environment to prevent any type of emission. The transfer car carries hot coke to cooling station, in a closed compartment so that no fumes and particles escape to the atmosphere. The hot coke is then transferred to uniquely designed coke disperse car, which spreads the hot coke on a tilting cooling bed. The hot coke is cooled by a non-contact rapid evaporation system, which consumes very little quantity of water and the hot steam is filtered and through negative pressure carried to a complex of multi cyclones and heat exchangers. Thus the heat energy of steam is gainfully utilized for hot air blast purpose which is subsequently used for augmentation of coke oven gas and also for drying of moist coke before supplying to blast furnaces. Mr Kerketta explained that the new technique which is environment friendly could be easily installed as a brown field project since some of the equipment’s are similar to equipment’s which are in use in some form or other in iron and steel making companies. In traditional wet quenching, it is worldwide practice to let the steam escape to open atmosphere. The invention addresses major problems of traditional wet coke quenching like, carbon emission by air pollution during coke pushing from coke ovens, huge water consumption in quenching towers, generation of large phenolic water waste, particulate emission from drying coke in open wharfs. In addition high moisture content in coke increases the coke rate in Blast Furnaces as well affects balances within Blast Furnaces. Mostly due to this reason, impurities like sulphur, phosphorus & ash etc increases, adversely affecting the productivity of blast furnaces. Increase in ash leads to expensive slag treatment. As per thumb rule 1% reduction in the ash content of the BF coke results into decrease in coke rate by 1 % to 1.5 %. Besides, higher phosphorus and sulphur in hot metal possess further problems in steel making.
The Hitvada reported that Steel Authority of India Limited’s Bhilai Steel Plant’s former General Manager Mr Ravi Rattan Kerketta has developed a new wet coke quenching process and that the invention is now in the final stage of grant of patent. The invention is revolutionary because for the first time the heat energy of steam during the wet coke quenching is gainfully utilized. Mr Kerketta has conceptualized and designed six main machines and equipment for the new wet quenching technique. In the new technique, the hot coke is pushed through a specially designed pushing system into a coke transfer car in a completely closed environment to prevent any type of emission. The transfer car carries hot coke to cooling station, in a closed compartment so that no fumes and particles escape to the atmosphere. The hot coke is then transferred to uniquely designed coke disperse car, which spreads the hot coke on a tilting cooling bed. The hot coke is cooled by a non-contact rapid evaporation system, which consumes very little quantity of water and the hot steam is filtered and through negative pressure carried to a complex of multi cyclones and heat exchangers. Thus the heat energy of steam is gainfully utilized for hot air blast purpose which is subsequently used for augmentation of coke oven gas and also for drying of moist coke before supplying to blast furnaces. Mr Kerketta explained that the new technique which is environment friendly could be easily installed as a brown field project since some of the equipment’s are similar to equipment’s which are in use in some form or other in iron and steel making companies. In traditional wet quenching, it is worldwide practice to let the steam escape to open atmosphere. The invention addresses major problems of traditional wet coke quenching like, carbon emission by air pollution during coke pushing from coke ovens, huge water consumption in quenching towers, generation of large phenolic water waste, particulate emission from drying coke in open wharfs. In addition high moisture content in coke increases the coke rate in Blast Furnaces as well affects balances within Blast Furnaces. Mostly due to this reason, impurities like sulphur, phosphorus & ash etc increases, adversely affecting the productivity of blast furnaces. Increase in ash leads to expensive slag treatment. As per thumb rule 1% reduction in the ash content of the BF coke results into decrease in coke rate by 1 % to 1.5 %. Besides, higher phosphorus and sulphur in hot metal possess further problems in steel making.
