Simulation Study On Pooling Behavior Of Anodic Furnace Bottom Blowing Refining Process

Anode furnace bottom blowing process has a direct impact on anode furnace blowing effect, production capacity and copper water quality.In order to improve the effect of heat transfer in the furnace,discharge slag easily and reduce the cost. we have to grasp the flow behavior of the fluid in the molten pool, reduce immersion time of the pool. In recent years, people researched the movement characteristics of melt in the bottom blowing furnace by the method of water simulation experiment and numerical simulation. They get that the control of spray gun distribution parameter is the key to that weather the technology can effectively play a role.According to the similarity theorem,This article is based on the anode refining furnace of a factory in Yunnan. A 1:10-scale model is built in order to investigate that the behavior of fluid flow is affected by the condition in the blowing process. Combined with water model and numerical simulation, we explore the influence of the stirring time, fluid flow and bubble behavior in the furnace with the changing of the parameter variable in the blowing process by changing bottom and Side blow volume,spray lance arrangement andspray gun inserte.Recording the generation of air bubbles, the flow field structure and movement of the form by particle image velocmetry system and a high-speed video camera to measure effective mixing area with a single porosity, find stir dead zone of the molten pool, avoid "nodules" and improve the mixing efficiency.Using the method of numerical simulation to mathematically model and numerically calculate for the water nitrogen gas two-phase flow process. In order to provide Suggestions for on-site process parameters optimization, the results of numerical simulation and experimental results were analyzed.The result show that the trend of simulation results well agreed with those from experience and maximum error is 7.8%.The computational models can be used to simulate the multiphase flow behavior within the anode refining furnace.Bottom blowing nitrogen gas enter molten pool formed bubbles for 108 ms, the average residence time in molten pool is 504 ms and the bubble formation frequency is 9Hz under designed condition; Side blowing bubbles formation time is 270 ms, the average residence time in the molten pool is 324 ms, the generation of air gun root frequency of 4 Hz;The optimal parameters of spray lance and arrangement as follows:the optimal Angle from spray gun to the center line is 20 °, the optimal spacing between gun to gun is 0.95 m,Spray gun is double row cross configuration. The factors affecting the bottom blowing lead bath smelting process has the following sequence:spray lance arrangement >spray lance spacing>spray lance inclination. There are most amount and minimum volume of small bubbles when Side blow volume is 1000L/h, spray gun inserte5 cm into the molten pool, the gas phase distribution in the region of the spray gun, areas near the pool level of side spray gun is reactivity zone in the refining furnace.Themelt splashing seriouslyin the refining furnace,Itmainly concentrated in the upper part of the bottom blowing lance area of furnace wall and side spray gun across the wall, we can reduce the spray gun configuration of injection gas and the reasonable ways tosolvethe splash of the melt.