Experimental Simulation On Electric Furnace And Sedimentation Area Of Dual Side-blown Copper Smelting Furnace

With the world cooper demand continuous growth,copper smelting slag is increasing simultaneously.High copper residue in slag is the main problem in cooper metallurgy,which restricts the further improvement of copper metallurgy.Thus,in this paper,the experimental simulations on electric furnace and sedimentation area of dual side-blown copper smelting furnace were conducted,and the impacts of operation condition on flow distribution and electrical property were obtained,which provided theoretical basis for industrial production and operation.In the research of flow distribution in sedimentation area of dual side-blown copper smelting furnace,according to the similarity principle,a 1:8 water model was established.Combined with flow distribution on different measuring section,the impacts of 6 injection velocities,3 nozzle arrangements,4 nozzle diameters and 3 injection angles on flow distribution were investigated with PIV,and the favorable operation conditions for dilution process was obtained.The results indicate that with the decrease of nozzle diameter and the growth of injection velocity and nozzle angle,the flow field in dilution area tended to fluctuate seriously,which went against the dilution process.The flow distribution under No.l nozzle arrangement was more favorable than it under No.2 and No.3 arrangement.Thus,when the injection velocities were 21m3/h and 23m3/h,nozzle arrangement was No.1,nozzle diameters was 3.7mm and 4.4mm,nozzle angle was 7 degree,the flow distribution was favorable for sedimentary process,as well as matte and slag discharge.In the research of electrical property in electric furnace,according to the similarity principle,a 1:20 water model was established.The electrical properties in different position in electric furnace were measured with probe method,the impacts of 3 bath depths,3 electrode immersion depths,3 solution concentrations and 3 electrode distances on electrical properties distribution were investigated,and the favorable operation conditions for dilution process were obtained.The results indicate that with the growth of bath depth and electrode immersion depth and the decrease of electrode distance,? U potential line shifted to the interior of furnace gradually,while the solution concentration had no influence on it.With the growth of electrode immersion and the decrease of bath depth and electrode distance,the low power area in bath reduced gradually,and the growth of solution concentration had a significant impact on furnace power improvement.Thus,when the bath depth was 70mm,electrode immersion depth was 40mm,solution concentration was 1mollL and electrode distance was 70mm,the electrical property distribution in bath was favorable for dilution process.In the industrial production,it is suggested to avoid excessive bath depth,increase electrode immersion depth and burden conductivity,and reduce electrode distance properly.