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三孔喷头的结构形式、马赫数、小孔夹角和小孔间距等参数的选择,以及吹炼枪位的确定是当前三孔喷头的研究中的几个重要課题。本文结合对喷头的冷态测定和转炉的吹炼实践对上述问题进行了研究。三喉式喷头由于其结构合理,能有效地将氧气压力能转化成射流的动能。同时提出了目前中小型转炉广泛使用的单三式喷头的改造途径。结合射流冲力衰减和实际吹炼枪位的数据,找出了枪位同射流冲力的关系,这样可用冷态测定的数据並指导转炉的枪位操作。在使用三孔喷头的情况下,转炉要顺利地进行吹炼,必须保证有适当的循环比(即射流的冲击半径同熔池半径之比),小孔夹角和间距是对循环比有影响的重要因素。
Three-hole nozzle structure, Mach number, the angle between the hole and the hole spacing and other parameters of choice, as well as the blowing gun position is the current three-hole nozzle in the study of several important issues. In this paper, the cold head of the nozzle and the converter blowing practice of the above problems were studied. Due to its reasonable structure, the triple-throat nozzle can effectively convert the oxygen pressure into the kinetic energy of the jet. At the same time, the reform methods of single three-nozzle which are widely used in small and medium-sized converters are put forward at the same time. Combining the decay of jet impulse with the data of the actual blowing gun position, the relationship between gun position and jet impulse was found out, so that the data of the cold test can be used to guide the gun operation of the converter. In the case of the three-hole nozzle, the converter must be operated smoothly, and a proper circulation ratio (ie, the ratio of the impact radius of the jet to the radius of the weld pool) must be ensured. The angle and pitch of the holes have influence on the circulation ratio The important factor.