通过数值模拟研究供氧方式对基夫赛特熔炼过程的影响。以中央喷射分配喷嘴的中央氧与侧氧质量流量比表示供氧方式,模拟质量流量比在 0.09~0.39 范围内的基夫赛特炉熔炼过程。结果表明,4 个中央喷射分配喷嘴下方区域为高效反应区。增大中央氧流量可以改善颗粒与气体的混合状况,从而促进化学反应的进行,同时会缩短高效反应区;但是,由于喷嘴下颗粒柱的分散会使烟尘率增加。对于熔炼能力为 50000 kg/h 的基夫赛特炉,其最优的供氧方式为质量流量比取 0.31,在该工况下,炉料的化学反应可以充分进行,同时也保证较低的烟尘率。
The influence of oxygen supply mode on the KIVCET (a Russian acronym for flash?cyclone?oxygen?electric?smelting) process was investigated using numerical simulation. The mass rate ratio (MRR) of central oxygen to lateral oxygen of the central jet distributor (CJD) burner was defined to express the oxygen supply mode, and the KIVCET process with an MRR ranging from 0.09 to 0.39 was simulated. The results show that there are four efficient reaction regions that correspond to four CJD burners. A higher central oxygen flow improves the mixing between particles and oxygen, thus enhancing reactions and shortening the reaction regions. However, a higher dust rate is induced due to the spread of the particle columns. The optimal MRR for a KIVCET furnace with a smelting capacity of 50000 kg/h is suggested to be 0.31. In this case, the chemical reactions associated with the feed are completed with an acceptable dust rate.
Transactions of Nonferrous Metals Society of China
Project (61621062) supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China.
central jet distributor (CJD) burner
computational fluid dynamics (CFD)
Corresponding author:Ping ZHOU;Tel:+86-13975804856;E-mail:email@example.com.