NUMERICAL SIMULATION RESEARCH OF THE DIAMETER AND DEPTH OF THE TAPHOLE IN THE HEARTH OF LARGE BLAST FURNACE
As one of the main equipment of iron and steel enterprises,the service life and working condition of blast furnace greatly affect the economic and social benefits of iron and steel enterprises.Facing the goal of"carbon neutrality,emission peak"in the new era,the blast furnace needs to further realize large-scale,modern,efficient and longevity development.At present,many large blast furnaces in China have experienced serious erosion phenomenon during the service period,and the life of the hearth has become an important factor limiting the life of large blast furnaces.The investigation results show that the carbon bricks are mainly affected by hot metal erosion,alkali metal,zinc damage and high temperature thermal stress.In this paper the commercial software Fluent is used to study the influence of the taphole diameter and the taphole depth on the flow field and temperature field of hot metal in the hearth of a 5 500 m3 blast furnace.The results show that when the taphole diameter increases from 55 mm to 65 mm,the velocity of hot metal near the sidewall of the hearth and the temperature of the carbon brick hot surface increase.When the taphole depth increases from 3.3 m to 4.3 m,the velocity of hot metal near the sidewall of the hearth and the temperature of the carbon brick hot surface decrease.Increasing the taphole depth and decreasing the taphole diameter properly is beneficial to reducing the flow rate of molten iron in the hearth and prolonging the life of the blast furnace.
blast furnacetapholediameterdepthhot metal flow ratecarbon brick temperature
万方数据
维普
