工频有芯感应熔铜炉感应体优化改造

Optimizing transformation of inductor in industrial frequency channel type induction copper melting furnace

针对工频有芯感应炉在再生黄铜熔铸中存在合金化能力差、感应体散热大和熔沟易被堵塞等问题,进行感应体熔沟间距扩大、感应体保温性能增强和熔沟宽厚比调整等优化改造。结果表明:熔沟间距增加90 mm,熔体进出口温差增加9.1℃,熔体出口速度增加0.042 m/s,元素弥散性能提升,元素质点变小,感应炉合金化能力得到提高;熔沟截面宽厚比由1.31调整到1.04,解决了熔沟被高熔点大尺寸金属堵塞故障;感应体保温结构外加10 mm纳米微孔板和32 mm莫来石质隔热砖,钢外壳温度下降179℃,电耗减少52 kWh/t。有助于推进再生黄铜熔铸行业30.60双碳目标进程。

For the problems such as poor alloying ability,large heat dissipation of induction body and easy blockage of the molten groove in the line-frequency channeled induction melting-copper furnace,the optimizing retrofit such as expanding the spacing between the molten groove,enhancing the thermal insulation of the induction body and adjusting to the aspect ratio of the trench cross-section has been completed.The application indicates that after the trench spacing increases by 90 mm,the temperature difference between the melt inlet and outlet will increase by 9.1℃,the melt outlet speed increases by 0.042 m/s,the element-dispersion performance improves,the element particles become smaller,and the improvement on the melt-alloying ability of the induction furnace is proved.After the aspect ratio of the trench cross-section is adjusted from 1.31 to 1.04,the blockage failure of the molten trench by the metal with the high melting point and the big size is eliminated.After the nano-micropore plate with the thickness 10 mm and the murlite insulating brick with the thickness 32 mm is added to the insulation structure of the induction body,the temperature of the steel shell drops by 179℃ and the electricity consumption is reduced by 52 kW·h/t.It will help to move the process of 30.60 double carbon target in the recycled brass melting and casting industry forward.