E le ho phehella ho eketsa nako ea bophelo le ho sebelisa litšobotsi tsalikotlolo tsa graphite, fektheri ea rona e entse lipatlisiso tse pharaletseng le lipatlisiso tlhahisong le ts'ebetsong ea tsona. Mona ke litaelo tsa ts'ebetso bakeng sa li-crucible tsa graphite:
Litlhokomelo tse khethehileng bakeng sa li-crucible tsa graphite tse hloekileng haholo:
Qoba ts'ebetso ea mochini 'me u se ke oa theola kapa ua otla crucible ho tloha bophahamong. 'Me e boloke e omme mme e hole e etsa mongobo. U se ke ua tšoara metsi ka mor'a hore a futhumatsoe 'me a omisitsoe.
Ha o sebelisa, qoba ho lebisa lelakabe ka ho toba tlase ho crucible. Ho pepeseha ka ho toba lelakabe ho ka siea matšoao a bohlokoa a matšo.
Ka mor'a ho koala sebōpi, tlosa aluminium leha e le efe e setseng kapa thepa ea koporo ho tloha ho crucible 'me u qobe ho siea leha e le efe e setseng.
Sebelisa lintho tse nang le asiti (joaloka flux) ka mokhoa o itekanetseng ho thibela ho bola le ho phatloha ha crucible.
Ha o eketsa lisebelisoa, qoba ho otla crucible 'me u qobe ho sebelisa matla a mochine.
Ho boloka le ho fetisa li-crucible tsa graphite:
Li-crucibles tsa graphite tse phahameng li na le bothata ba metsi, kahoo li lokela ho sireletsoa ho tloha mongobo le ho pepesehela metsi.
Ela hloko ho qoba tšenyo e ka holimo. U se ke ua beha crucible ka ho toba fatše; ho e-na le hoo, sebelisa pallet kapa stack board.
Ha u tsamaisa crucible, qoba ho e phutholla ka lehlakore fatše. Haeba e hloka ho potoloha ho ea holimo, beha k'hateboto e teteaneng kapa lesela fatše ho thibela mengoapo kapa makhopho ka tlase.
Nakong ea phetisetso, ela hloko haholo hore u se ke ua theola kapa ua otla crucible.
Ho kenya li-crucible tsa graphite:
Setulo sa crucible (sethala sa crucible) se lokela ho ba le bophara bo lekanang kapa bo boholo ho feta botlaaseng ba crucible. Bophahamo ba sethala bo lokela ho ba bo phahameng ho feta molomo oa lelakabe ho thibela lelakabe hore le se fihle ho crucible ka kotloloho.
Haeba ho sebelisoa litene tse refractory bakeng sa sethaleng, litene tse chitja li khethoa, 'me li lokela ho ba tse bataletseng ntle le ho khumama. Qoba ho sebelisa litene tse halofo kapa tse sa lekaneng, 'me ho kgothaletswa ho sebelisa li-platform tsa graphite tse tsoang kantle ho naha.
Beha setopo sa crucible bohareng ba ho qhibiliha kapa ho haka, 'me u sebelise phofo ea carbon, molora oa raese, kapa k'hothone ea refractory e le mosamo ho thibela crucible hore e se ke ea khomarela setulong. Kamora ho beha crucible, etsa bonnete ba hore e lekantsoe (ho sebelisa boemo ba moea).
Khetha lithupa tse loketseng tse tsamaellanang le sebōpi, 'me u boloke lekhalo le loketseng (bonyane (40mm) pakeng tsa crucible le lebota la sebōpi.
Ha u sebelisa crucible e nang le spout, siea sebaka se ka bang 30-50mm pakeng tsa spout le setene sa refractory ka tlase. U se ke ua beha letho ka tlase, 'me u sebelise k'hothone ea refractory ho theola kamano pakeng tsa spout le lerako la sebōpi. Lerako la sebōpi le lokela ho ba le litene tse tsitsitseng tse hanyetsang (lintlha tse tharo), le karete ea masenke e ka bang 3mm e teteaneng e lokela ho behoa tlas'a crucible ho lumella ho atolosoa ha mocheso ka mor'a ho futhumatsa.
Ho futhumatsa le ho omisa li-crucible tsa graphite:
Preheat crucible haufi le sebōpi sa oli bakeng sa lihora tse 4-5 pele o sebelisoa ho thusa ho tlosa mongobo ho tloha holim'a crucible.
Bakeng sa li-crucibles tse ncha, beha mashala kapa patsi ka har'a crucible 'me ue chese ka lihora tse ka bang 'nè ho thusa ho tlosa mongobo.
Linako tse khothaletsoang tsa ho futhumatsa bakeng sa crucible e ncha ke tse latelang:
0 ℃ ho 200 ℃: Butle-butle phahamisa mocheso ka lihora tse 4.
Bakeng sa libopi tsa oli: Eketsa mocheso butle-butle bakeng sa hora e le 'ngoe, ho tloha ho 0 ℃ ho ea ho 300 ℃, 'me u hloka lihora tse 4 ho tloha ho 200 ℃ ho ea ho 300 ℃,
Bakeng sa libono tsa motlakase: hloka lihora tse 4 ho futhumatsa nako ho tloha ho 300 ℃ ho isa ho 800 ℃, ebe lihora tse 4 ho tloha 300 ℃ ho isa 400 ℃. ho tloha ho 400 ℃ ho ea ho 600 ℃, eketsa mocheso ka potlako 'me u boloke lihora tse peli.
Ka mor'a ho koala sebōpi, linako tse khothalletsoang tsa ho futhumatsa hape ke tse latelang:
Bakeng sa libono tsa oli le tsa motlakase: Ho hloka lihora tse 1 ho futhumatsa nako ho tloha ho 0 ℃ ho isa ho 300 ℃. E hloka lihora tse 4 ho futhumatsa nako ho tloha ho 300 ℃ ho isa ho 600 ℃. Ka potlako eketsa mocheso ho ea boemong bo lakatsehang.
Lisebelisoa tsa ho tjhaja:
Ha u sebelisa li-crucible tsa graphite tse hloekileng, qala ka ho eketsa lisebelisoa tse nyenyane tsa sekhutlo pele u eketsa likotoana tse kholoanyane. Sebelisa li-tong ho beha lisebelisoa ka hloko le ka khutso ka har'a crucible. Qoba ho jarisa crucible ho e thibela ho robeha.
Bakeng sa libono tsa oli, lisebelisoa li ka eketsoa kamora ho fihla ho 300 ℃.
Bakeng sa libono tsa motlakase:
Ho tloha ho 200 ℃ ho isa ho 300 ℃, qala ho eketsa lisebelisoa tse nyane. Ho tloha 400 ℃ ho ea pele, butle-butle eketsa lisebelisoa tse kholoanyane. Ha u eketsa lisebelisoa nakong ea tlhahiso e tsoelang pele, qoba ho li kenya sebakeng se le seng ho thibela oxidation molomong oa crucible.
Bakeng sa libono tsa motlakase tse kenang, futhumatsang ho 500 ℃ pele u tšela aluminium e qhibilihisitsoeng.
Litlhokomelo nakong ea tšebeliso ea li-crucible tsa graphite:
Tšoara lisebelisoa ka hloko ha u li eketsa ho crucible, ho qoba ho behoa ka matla ho thibela ho senya crucible.
Bakeng sa li-crucibles tse sebelisoang khafetsa bakeng sa lihora tse 24, nako ea tsona ea bophelo e ka eketsoa. Qetellong ea letsatsi la mosebetsi le ho koala sebōpi, thepa e qhibilihisitsoeng ka har'a crucible e lokela ho tlosoa ho thibela ho tiisa le ho atolosoa ho latelang, e leng se ka lebisang ho senyeha ha crucible kapa ho senyeha.
Ha u sebelisa lisebelisoa tse qhibilihisang (tse kang FLLUX bakeng sa lisebelisoa tsa aluminium kapa borax bakeng sa lisebelisoa tsa koporo), li sebelise ka mokhoa o fokolang ho qoba ho senya marako a crucible. Eketsa mahlahana ha aluminium e qhibiliha e ka ba metsotso e 8 ho tloha ho tlala, ho susumetsa ka bonolo ho thibela ho khomarela marako a crucible.
Tlhokomeliso: Haeba ntho e qhibilihang e na le lintho tse fetang 10% tsa sodium (Na), ho hlokahala crucible e khethehileng e entsoeng ka thepa e khethehileng.
Qetellong ea letsatsi le leng le le leng la mosebetsi, ha crucible e ntse e chesa, hang-hang tlosa tšepe leha e le efe e khomarelang marako a crucible ho thibela masala a feteletseng, a ka amang ho fetisoa ha mocheso le ho lelefatsa nako ea ho qhibiliha, ho baka ho atolosoa ha mocheso le ho senyeha ho ka bang teng.
Ho kgothaletswa ho hlahloba boemo ba crucible hoo e ka bang likhoeli tse ling le tse ling tse peli bakeng sa lisebelisoa tsa aluminium (beke le beke bakeng sa lisebelisoa tsa koporo). Hlahloba bokantle ba ka ntle 'me u hloekise kamore ea sebōpi. Ho phaella moo, potoloha crucible ho netefatsa hore esita le ho apara, e leng ho thusang ho lelefatsa bophelo ba li-crucible tsa graphite tse phahameng.
Ka ho latela litaelo tsena tsa ts'ebetso, basebelisi ba ka eketsa nako ea bophelo le katleho ea li-crucible tsa bona tsa graphite, ho netefatsa ts'ebetso e nepahetseng lits'ebetsong tse fapaneng.
Nako ea poso: Jul-10-2023