Method for melting steel and scrap steel in ukuchithwa kwesithando somlilo

Ngaphambi kokuba i-furnace induction ihlawuliswe, intsalela kwisithando somlilo kufuneka isuswe, kwaye umonakalo wesithando somlilo kufuneka uhlolwe. Iindawo ezonakaliswe kakhulu ziye zaba mnyama ngenxa yokupholisa ngokukhawuleza kwaye kufuneka zilungiswe. Ubungakanani obuziinkozo bezinto zokulungisa kufuneka bube buncinci kunento edibeneyo, kwaye i-binder esetyenzisiweyo kufuneka ibe yinto encinci. Iziko ezikhulu ezonakaliswe kakhulu zinokuthi zifakwe kwimold yentsimbi yesithando somlilo ukuze zizalise amaqhina.

Ekubeni ukushisa kwesithando somlilo se-induction kwehla ngokukhawuleza emva kokucofa, kufuneka kuhlawuliswe ngokukhawuleza kwaye kufuneka kuzaliswe imibhobho kangangoko kunokwenzeka. Ukuze kukhawuleziswe ukunyibilika, izinto eziphathekayo kufuneka zihanjiswe ngokufanelekileyo ngokuhambelana nokusabalalisa kweqondo lokushisa kwisithando somlilo. Ukuhanjiswa kweqondo lokushisa kwi-furnace induction kuboniswe kuMfanekiso 4-25. Ngenxa yempembelelo yesikhumba yangoku, indawo ejikelezileyo yekholamu yezinto eziphathekayo (indawo I) kufuphi nodonga lwe-volute yindawo yokushisa ephezulu.

Umzantsi kunye nombindi (I, TT zone) zinefuthe elibi kakhulu, eliyindawo ephezulu yobushushu, kwaye indawo ephezulu (indawo ye-IV) inobushushu obuncinci kunye nokulahleka okukhulu kobushushu, okuyindawo yobushushu obuphantsi.

Ukuze wenze i-slag kwangaphambili, i-1% yezinto ze-slag ngobunzima zingadibaniswa phantsi kwesithando somlilo ngaphambi kokutshaja, i-lime kunye ne-fluorite yongezwa kwisithando somlilo se-alkali, kunye ne-glass cullet yongezwa kwisithando somlilo se-asidi.

Ekuqaleni kokuncibilika, ngenxa yokuba i-inductance kunye ne-capacitance kumgca ayinakuhambelana ngokukhawuleza kwaye ngokufanelekileyo, okwangoku ayizinzile, ngoko inokunikezelwa kuphela ngamandla aphantsi ngexesha elifutshane. Emva kokuba i-current izinzile, kufuneka itshintshelwe kwi-transmission epheleleyo yomthwalo. Ngethuba lenkqubo yokunyibilika, i-capacitor kufuneka ihlale ihlengahlengiswa ukuze igcine izixhobo zombane kunye nomgangatho ophezulu wamandla. Emva kokuba umrhumo unyibilike ngokupheleleyo, intsimbi etyhidiweyo igqithise kakhulu kwinqanaba elithile, kwaye ke amandla okufaka ancitshiswa ngokweemfuno zokunyibilikisa.

Ixesha elifanelekileyo lokunyibilika kufuneka lilawulwe. Ukuba ixesha lokunyibilika lifutshane kakhulu, liya kubangela ubunzima ekukhetheni i-voltage kunye ne-capacitance. Ukuba lide kakhulu, liya kwandisa ilahleko yobushushu obungenamsebenzi. Ilaphu elingafanelekanga okanye ukugqwala okugqithisileyo kwimpahla yesithando somlilo kuya kubangela “ibhuloho” isenzeko, ekufuneka sijongwe ngexesha. “Ibhulorho” ithintela into enganyibilikiyo kwindawo ephezulu ukuba ingaweli kwintsimbi etyhidiweyo, inyakazise i-yuhua, kwaye ubushushu bobushushu bomzantsi wentsimbi etyhidiweyo bunokonakalisa ngokulula umbane wesithando somlilo, kwaye kuya kubangela ukuba intsimbi etyhidiweyo ifunxe isixa esikhulu. yerhasi.

Ngenxa yokuvuselela i-electromagnetic, umbindi wentsimbi etyhidiweyo, kwaye i-slag idla ngokugeleza ukuya kumda we-crucible kwaye ibambelele eludongeni lwesithando somlilo. Ngoko ke, i-slag kufuneka yongezwe ngokuqhubekayo ngokwemiqathango yesithando somlilo ngexesha lokunyibilika.