Dhexroorka yar, oo u dhexeeya 75mm ilaa 225mm, electrode our graphite waxaa si gaar ah loogu talagalay in lagu daboolo baahida warshadaha sida dhalidda kalsiyum carbide, wax soo saarka carborundum, sifaynta corundum cad, biraha dhif ah dhalaalay, iyo Ferrosilicon dhirta baahida refractory.