(1. 昆明理工大學(xué) 省部共建復(fù)雜有色金屬資源清潔利用國家重點(diǎn)實(shí)驗(yàn)室，昆明 650093；
2. 昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093；
3. 中國瑞林工程技術(shù)有限公司，南昌 330002)
摘 要: 為闡明底吹熔池氣體射流振蕩強(qiáng)化攪拌機(jī)制，提出了基于 Betti數(shù)來定量表征底吹氣體振蕩射流強(qiáng)化攪拌效果的新途徑，并以此為評價標(biāo)準(zhǔn)提出底吹爐氧槍排布的優(yōu)化方案。首先，基于正交試驗(yàn)理論，設(shè)計了多水平因子水模型實(shí)驗(yàn)方案；其次，運(yùn)用攝像設(shè)備捕捉了19 組底吹水模型容器內(nèi)氣液流態(tài)演化過程的連續(xù)圖片，通過圖像處理技術(shù)得到連續(xù)流態(tài)圖片的Betti數(shù)；最后，通過Betti數(shù)的分布規(guī)律來實(shí)現(xiàn)不同工況下氣體射流振蕩攪拌效果的差異化表征。結(jié)果表明：在單排氧槍排布方式下，在 0°~14°范圍槍傾角越大，射流產(chǎn)生氣泡數(shù)量越多，分布更為均勻；在雙排氧槍排布方式下，非對稱噴吹的射流振蕩攪拌效果明顯更好，且采用 0°與 7°傾角的特征數(shù)值更為理想。
關(guān)鍵字: 底吹熔池；射流振蕩；強(qiáng)化攪拌；圖像處理；氧槍排布
（1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China;
2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China;
3. China Nerin Engineering Co., Ltd., Nanchang 330002, China）
Abstract:In order to clarify the enhanced stirring mechanism of oscillatory gas jet in bottom-blown bath, a new way based on Betti numbers to quantitatively characterize the enhanced stirring effect was proposed. The optimization scheme of oxygen lance arrangement in bottom blowing furnace was confirmed by the evaluation standard of Betti numbers. Firstly, based on the orthogonal experiment theory, the multi-level factor water model experiment was designed. Secondly, the continuous images of the evolution process of the gas-water flow state in 19 sets of water model vessels were captured by camera equipment, and Betti numbers of continuous flow images were obtained by image processing technique. Finally, the differential characterization of the stirring effect of the oscillatory gas jet under different working conditions was realized through the distribution regularities of Betti numbers. The results show that, in the single row oxygen lance arrangement mode, from the range of 0 ° to 14 °, the larger the angle of oxygen lance is, the more bubbles the jet produces, and the bubble distribution is also more uniform. Under the arrangement mode of double row oxygen lance, the stirring effect of oscillatory gas jet with asymmetric injection is obviously better, and the characteristic values of 0 ° and 7 ° inclination angle are more ideal.
Key words: bottom-blowing bath; jet oscillation; reinforce stirring; image processing; lance arrangement
