Ko te graphite crucible, e mohiotia ana ko te ladle parahi whakarewa, te parahi whakarewa, me etahi atu, e pa ana ki tetahi momo parapara i mahia ma te pupuhi kauwhata, uku, silica me te wax hei rauemi mata. Ka whakamahia te nuinga o nga parapara graphite ki te whakarewa i te parahi, te parahi, te koura, te hiriwa, te zinc me te mata me etahi atu konganuku kore-ferrous me o raatau katoa ...
Pānuitia atu