Graphite Crucible, wanda kuma aka sani da narkakken ladle na jan karfe, narkakken jan ƙarfe, da sauransu, yana nufin nau'in crucible da aka yi ta hanyar harbin graphite, yumbu, silica da kakin zuma azaman albarkatun ƙasa. Ana amfani da ginshiƙan ginshiƙan graphite galibi don narka tagulla, tagulla, zinare, azurfa, zinc da gubar da sauran karafan da ba na ƙarfe ba da duk...
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