Optimization Of Refining Process And Numerical Simulation Of Multiphase Flow Pressure In Bottom - Blown Anode Furnace

Bottom-blowing copper smelting technology is a new process for pyro-refining and has made a great success in the wide application of copper smelting since the anode furnace is produced. The complex blowing process of bottom and side blowing of the anode furnace has great influence on refinement and productivity of the anode furnace. In recent years, it has been widely considered on the flow characteristics of the complex melt and has been paid little attention on the whole bottom blowing. For the enhancement of heat transfer, well slagging and economic efficiency, the bottom-blowing anode furnace with full bath was employed to detect the reaction system within the bath by experiment and to study the influence of bath reaction on heat transfer, mass transfer and pressure field by simulation, which serves a new understanding and great significance for the refining of the anode furnace.In this paper, based on the anode furnace of a factory in Yunnan province, the basic dimensions of the anode furnace model was calculated by the similarity theorem and the plexiglass model with the ration of 1:10 was produced. To optimize the inner bath smelting process, the lances of anode furnace at bottom was increased and numerical and water model experiment were employed to analyze and process to obtain the following conclusions:The data modeling physical models meet the models of basic conservation equations, vof model and turbulence model. Its reliability was verified by water model experiment and numerical simulation.The best way of the lance arrangement is:the lance with the center line at bottom were at an angle of 21 °. The lances at bottom were arranged as a of single row with seven groups. The optimal blowing gas at bottom of the bath was 0.96m3/h with the nozzle Φ 2.8mm.By analyzing the pressure conditions of the bath after optimization, the pressure of the furnace was obtained with layer distribution and the maximum pressure was 1500Pa at the mouth of lance.By analyzing the speed in the bath, a uniform velocity distribution was obtained at 0.5m/s and 1m/s and the average velocity of the bath was 0.54m/s. The maximum velocity was at the surface of the bath with the velocity of 6m/s.The maximum error valuebetween numerical simulation and experimental results of water model was 7.9%, which confirms the reliability of the water model experiment. The error value of the diameter of the air mass, frequency and floating rate were 7.9%^-6% and -3.2%.By optimizing the method with whole bottom blowing lance, the slow areas in the bath were decreased by reasonable arrangement of lances. According to the flow chart, the average velocity of the fluid motion was increased and the effect of stirring was improved. It was verified that rational distribution of the position of the lance had great effect of the flow field distribution and injection mixing process within the bath thus the bath stirring mixing time is reduced to 138s.under the actual production conditions in the refining furnace melt splashing in severe cases, mainly concentrated in the upper part of the bottom blowing lance area of furnace wall and side spray gun across the wall, the optimized splash volume mainly concentrated on the top of the molten pool, splash amount was optimized.