Abstract:Based on the relevant parameters of liquid high-lead slag direct reduction cold test, a numerical simulation was conducted on the cold test by using software CFX. The study showed that penetration velocity increased gradually with the increasing of coke size but decreased with the increase of the melting viscosity. The trend of the penetration speed by CFX numerical simulation was the same as cold test, which verified the creditability about the numerical simulation of liquid lead slag test in direct reduction. It served as a reference for the parameter optimization in liquid lead slag direct reduction process.