Yiziphi izidingo zekhwalithi ye-graphite electrode yesithando somlilo se-DC arc?

I-electrode ye-graphite esetshenziswa ku-DC arc furnace ayinawo umphumela wesikhumba lapho i-current idlula, futhi yamanje isatshalaliswa ngokulinganayo engxenyeni yamanje yesiphambano. Uma kuqhathaniswa nesithando somlilo se-AC arc, ukuminyana kwamanje nge-electrode kungandiswa ngokufanelekile. Ezithandweni zikagesi ezinamandla aphezulu anamandla afanayo okufaka, izithando zomlilo ze-DC arc zisebenzisa i-electrode eyodwa kuphela, futhi ububanzi be-electrode bukhulu, njengeziko likagesi elingu-100t AC lisebenzisa ama-electrode anobubanzi obungu-600mm, kanye neziko le-arc elingu-100t DC. ama-electrode anobubanzi obungu-700mm, namafurnace ama-arc amakhulu e-DC aze adinga ama-electrode anobubanzi obungu-750-800mm. Umthwalo wamanje nawo uya ngokuya ukhuphuka, ngakho-ke izidingo ezilandelayo zibekwe phambili ngekhwalithi ye-electrode yegraphite:

(1) Izinga elihle lomzimba we-electrode kanye nelunga kufanele libe lincane, njengokuthi ukumelana nomzimba we-electrode kwehliselwe cishe ku-5μΩ·m, futhi ukumelana nokuhlangana kwehliswa kube cishe ku-4μΩ·m. Ukunciphisa ukumelana kwe-graphite electrode, ngaphezu kokukhetha izinto ezingavuthiwe zenaliti ye-coke, izinga lokushisa le-graphitization kufanele lenyuswe ngokufanele.

(2) Umugqa wokunweba i-coefficient womzimba we-electrode kanye nelunga kufanele kube phansi, futhi i-axial kanye ne-radial linear expansi coefficient yomzimba we-electrode kufanele igcine ubudlelwano obufanele bokulinganisa ne-coefficient yokunweba okushisayo okuhambisanayo kwelunga ngokosayizi welunga. ukuminyana kwamanje okudlulayo.

(3) I-conductivity eshisayo ye-electrode kufanele ibe phezulu. Ukushisa okuphezulu kwe-thermal kungenza ukudluliswa kokushisa ku-electrode ye-graphite ngokushesha, futhi izinga lokushisa le-radial liyancishiswa, ngaleyo ndlela kunciphise ukucindezeleka okushisayo.

(4) inamandla anele okusebenza, njengamandla okugoba omzimba we-electrode afinyelela cishe ku-12MPa, futhi amandla elunga aphakeme kakhulu kunomzimba we-electrode, okufanele ngokujwayelekile ube phezulu ngokuphindwe ka-1. Ngokuhlanganyela, amandla okuqina kufanele akalwe, futhi i-torque elinganiselwe kufanele isetshenziswe ngemva kokuxhumeka kwe-electrode, ukuze iziphetho ezimbili ze-electrode zigcine ukucindezela okuthile okuqinile.

(5) I-porosity ye-electrode kufanele ibe phansi ukuze kuncishiswe ukusetshenziswa kwe-oxidation kwendawo ye-electrode.