Abantu abaningi bathanda ukugqoka ubucwebe bensimbi obuyigugu obufana namasongo, imigexo, izindandatho, amacici, njll. Izinsimbi eziyinhloko ezisetshenziselwa ubucwebe igolide neplatinamu.
Isinyathelo sokuqala sokwenza ubucwebe bensimbi eyigugu ukuncibilikisa insimbi eyigugu ngokusebenzisa aisithando somlilo.Kunezinhlobo eziningi zezithando zomlilo ezincibilika emakethe.Sizobhekana nezinkinga ezithile lapho sikhetha isithando somlilo esincibilikayo.Thina don'Asazi ukuthi yisiphi isithando somlilo esifanelana kangcono nezidingo zethu zokuncibilika kwensimbi.
Embonini yobucwebe, kuvamile ukusebenzisa iziko lokungeniswa ukuze kuncibilike izinsimbi.Ngakho uma ufuna ukukhetha aisithando somlilo, udinga ukunaka amaphuzu alandelayo:
Eqinisweni, izithando zokuncibilika kwe-induction zivame ukusetshenziswa kumafrikhwensi aphakathi nendawo kanye neziko likagesi.Izinga lokushisa eliphezulu le-intermediate frequency melting furnace lingama-2600°C. Izinga lokushisa eliphezulu lesithando somlilo sefrikhwensi ngu-1600°C. Ngakho-ke uma ufuna ukuthenga isitofu se-induction, kuya ngensimbi ofuna ukuyincibilikisa.
Indawo yokuncibilika kwegolide ngu-1064°C, indawo encibilikayo yeplatinamu ingu-1768°C, kanti indawo yokuncibilika kwesiliva ingu-961°C. Ngakho-ke uma uncibilikisa igolide nesiliva, kufanele usebenzise isithando somlilo esincibilikisa imvamisa ephezulu, hhayi isithando somlilo esimaphakathi.Uma izinga lokushisa lokuncibilika liphezulu kakhulu, lizodala ushintsho kukhwalithi yensimbi.Insimbi encibilikisiwe ingangcoliswa.
Ngendlela, lapho sikhetha isithando somlilo esincibilikayo, sidinga futhi ukunaka uhlobo lwe-crucible.Kunezinhlobo ezimbili zama-crucibles: i-graphite crucible kanye ne-quartz crucible.Kuye ngezinga lokushisa elincibilikayo, ama-graphite crucibles asetshenziswa ezithandweni zokuvama okuphezulu.Futhi i-quartz crucible yesithando somlilo esiphakathi nendawo.I-quartz imelana kakhulu namazinga okushisa aphezulu kune-graphite.Kumele kuqashelwe ukuthi isiliva ingasetshenziswa kuphela ku-graphite crucibles, hhayi ku-quartz crucibles.Ngenxa yokuthi isiliva isabela nge-quartz futhi ivimbela isiliva ekuncibilikeni ngokuphelele, izobe isinamathela ku-crucible futhi ibangele ukulahlekelwa okukhulu.
Isikhathi sokuthumela: Feb-08-2023