Reduction of copper slag blowing mechanism and Numerical Simulation Study
|School||Kunming University of Science and Technology|
|Keywords||Copper slag Depleted furnace Reductant G Gun Numerical Simulation|
In order to strengthen the smelting process, control of environmental pollution, mostly in the copper smelting process using oxygen-enriched air or industrial oxygen, oxygen potential as high smelting system, resulting in elevated copper slag. Currently copper 0.4% -0.5% copper has been mined, while the output of copper still spoil -0.8% up to 0.4%, resulting in a waste of resources for exploitation. In the increasingly stringent environmental requirements and mineral resources become increasingly scarce today, copper slag comprehensive recycling gradually attracted the attention of people. Company A depleted papers combined with the actual situation of the electric furnace, electric furnace for an existing depleted gun used to restore the serious issues such as low carbon and reduction calculation and simulation experiments. By thermodynamic calculations to identify the gun used in the reduction mechanism and reducing carbon G reasons; furnace by optimizing the use of depleted gun gun, bubble dynamics change the restore process conditions conducive to the separation of copper matte, settlement, achieve greater reduction rate, reduce the amount of copper slag purpose. The use of physical and numerical modeling of combining research methods, optimizing furnace used to restore depleted airbrush gun type and bubble flow field program. Prototype based on the similarity theory and symmetry, experimental models using local water simulation experiment, observation of seven different types of guns circulating bubbles formed and behavior; while under the continuity equation, momentum equation and energy transfer propagation equations describe lance established furnace blowing process fluid flow dilution flow field showed that using commercial software FLUENT numerical simulation. By thermodynamic calculations show that G reductant is injected into the gun muzzle at a distance of 0.83m at the rear has reached carbonization temperature; through hydraulic model experiments and numerical simulations, airbrush gun found on depleted furnace has an important impact on the flow field. In experiments conducted by the seven gun-type structure, with water simulations 5 # gun production conditions can better meet the requirements of the bubble dynamics. The mathematical model used in the experiment results obtained can better explain the process of blowing the molten pool and low-speed flow field displays dynamic phenomena blowing large bubbles, and hydraulic model simulation results are basically the same. The experimental results will be depleted for improving the efficiency furnace reduction, reducing the amount of copper slag and other aspects have been greatly improved, the flow field for the further mathematical simulation provides preconditions for strengthening depleted Company A furnace reduction process, process optimization also provides a theoretical basis.