钒铁电弧炉底吹增氮的水模型实验研究

Water modeling study on the bottom blowing of N_2 in a ferrovanadium electric arc furnace

通过1∶2的比例建立水力学模型并应用正交表L25(56)设计正交实验,对国内某公司的3t钒铁炉进行底吹N2模拟,研究三点底吹条件下不同底吹位置和底吹流量对钒铁液混匀时间的影响.结果表明,最佳的底吹方案为:模型底吹流量为1306 L/h,底吹点位置为e(0.7R)、d(0.6R)、e(0.7R);底吹流量和底吹位置对混匀时间均有显著性影响,对混匀时间进行拟合可知混匀时间与底吹流量呈幂指数关系,指数值为-0.5211.

A water model of 1∶ 2 scale was established to simulate the bottom blowing of N2 in a 3 t ferrovanadium electric arc furnace( EAF). The L25( 56) orthogonal matrix was adopted to investigate the influence of different blowing positions and nitrogen blowing rates on the mixing time of liquid. Results show that the optimal bottom blowing conditions are as the following: the flow rate of bottom blowing is 1306 L /h and the positions of porous plugs are e( 0. 7R),d( 0. 6R),and e( 0. 7R) in the model. Both the position of porous plugs and the gas flow rate have significance on mixing time. The mixing time fitting result indicates that there is an exponential relationship between mixing time and gas flow rate,and the index value is- 0. 5211.