气体流量对底吹炼铜炉吹炼过程的影响

Influence of Gas Flow Rate on Converting Process of Bottom-Blowing Copper Converter

首先利用Fluent软件对底吹炉用的氧枪内气体流动过程进行模拟研究,分析了三种工况下进口参数与气体流量的对应关系,给现场进行流量调节提供了理论依据。然后以氧枪出口气体的流动参数作为边界条件,利用VOF模型对底吹炉渣、铜锍、粗铜、空气四相流动过程进行模拟研究。研究了不同流量下的熔体流动规律,包括熔池内的密度分布、熔池平均速度、液面波动状况以及喷溅量等。当气体流量为0.43kg/s时,熔池内的平均速度较高,混合强度大,但是也会造成液面波动和喷溅量过大的现象,严重时会导致下料口堵塞,影响正常生产过程。

Flowing process of oxygen lance used in bottom blowing converter was simulated by Fluent software.Corresponding relationship between inlet parameters and gas flow rate was analyzed,which provide theoretical basis for flow regulation of production process.Outlet parameters of oxygen lance were taken as boundary conditions to calculate gas-copper-copper matte-slag multi-phase flow process in bottom blowing converter.Density distribution,average velocity of molten pool,surface fluctuation and splashing were also investigated.Average velocity and mixing intensity are higher under the gas flow rate of 0.43 kg/s,which may cause serious surface fluctuation and splashing,and disturb normal production process.