基于两种烧嘴的铜精炼阳极炉内燃烧过程数值模拟

Numerical Simulation of Gaseous Combustion Process in Anode Furnace of Copper Refining with Two Types of Burner

基于CFD软件Fluent 6.3对装配两种型式烧嘴的铜精炼阳极炉内的燃烧过程进行数值计算,分析了炉内气相燃烧过程的特点.结果表明,装配I型烧嘴时,保温期炉内火焰峰值温度为2301 K,火焰长度为2.3R(R为炉体半径),氧化期炉内火焰峰值温度为2506 K,火焰长度为2.0R;装配II型烧嘴时,保温期炉内火焰峰值温度为2610 K,火焰长度为1.85R,氧化期炉内火焰峰值温度高达2800 K,火焰长度为1.82R.装配I型烧嘴的阳极炉内温度较均匀,能更好满足阳极炉精炼的工艺需求.烧嘴结构和天然气速度、环氧速度与侧氧速度对阳极炉内气相燃烧过程有明显影响.

Numerical simulation was carried out with CFD Fluent 6.3 software to investigate the gaseous combustion processes in the anode furnace of copper refining equipped with two different types of burner. The simulation results show that when the furnace is equipped with Type I burner, the peak temperature of the flame is 2301 K and the flame length 2.3R （R is the furnace radius） in the heat persevation period, while in the oxidation period, the peak value of the flame temperature increases to 2 506 K and the flame length is 2.0R. When the fitrnace is equipped with Type II burner, the highest flame temperature is 2610 K and the flame length 1.85R in the heat persevation period, and the peak temperature of the flame is 2 800 K and the flame length 1.82R in the oxidation period. The distribution of gaseous temperature inside the furnace is more uniform in the case of Type I burner, which meets the needs of copper refining process better as well. The burner structure and operational parameters （including natural gas velocity, outer oxygen velocity, side oxygen velocity） have significant influences on the gaseous combustion process in the anode furnace of copper refining.