Taking the circulating water system of converter as the research object,the high pressure rich energy is used to start or accelerate the natural circulation to realize the optimization of the energy used in the system,to achieve the win-win effect of both energy saving of the system and longevity of the tail flue.Research and analyze the structural defects of the front flue,develop the anti-splashing and slagging technology,and the follow-up sealing device,etc.,so as to increase the service life of the front flue by more than 2 years,and reduce the nitrogen consumption by about 90%.A series of high efficiency and energy saving core power equipment is developped and applicated.These equip-ments solved the evaporative cooling system common technical problems of the poor steam quality and low steam production.The technology increases the steam production per ton of steel to 100~130 kg,sewer system heat loss by 50%,and deaerator exhaust steam heat loss by 50%.