Simulation and Application of Swirl-Type Oxygen Lance in Vanadium Extraction Converter

Authors

  • Ming Lv,

    Corresponding author
    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    • State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
    Search for more papers by this author
  • Rong Zhu,

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Search for more papers by this author
  • Hui Wang,

    1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
    2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    Search for more papers by this author
  • Ruiguo Bai

    1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
    2. Chengde Iron and Steel Company, Chengde 067002, Hebei, China
    Search for more papers by this author

Abstract

Stirring effects and impacting characteristics of conventional and various swirl-type oxygen lances (Swirl angles are 5°, 10°, and 13°, respectively) on the molten pool were studied. The mixing time, impacting depth and impacting diameter were measured by water model experiment. The flow field characteristics of gas–liquid two phase flow were simulated using Fluent software. It is found that 10° swirl-type oxygen lance injection can get the shortest mixing time which is only 47.6 s. The area surrounded by isovelocity is larger in molten pool when injecting by the swirl-type oxygen lance. When injecting by the 10° swirl-type oxygen lance, the area is the largest and the flow velocity of liquid steel is the highest. On this basis, the 10° swirl-type oxygen lance was experimented in 150 t vanadium extraction converter. The experiment shows that the swirl-type oxygen lance can guarantee the normal smelting process. Compared with the conventional oxygen lance, the reduction ratio of vanadium content in semi-steel is 17.8%, vanadium extraction rate is increased by 5.1%, V2O5 grade of vanadium slag is increased by 0.93% and iron loss is reduced. It provides a new technology to improve the recovery of vanadium resources in converter.

Ancillary