Isishwankathelo seGraphite Crucible

Isishwankathelo
I-graphite crucibleyenziwe kwi-graphite ye-flake yendalo njengeyona nto iphambili ekrwada, kwaye ilungiswa ngodongwe olulahlisiweyo lweplastiki okanye ikhabhoni njengesibophelelo.Ineempawu zokuxhathisa ubushushu obuphezulu, i-thermal conductivity eyomeleleyo, ukumelana ne-corrosion elungileyo, kunye nobomi benkonzo ende.Ngexesha lokusetyenziswa kobushushu obuphezulu, i-coefficient yokwandiswa kwe-thermal incinci, kwaye inomsebenzi othile wokumelana noxinzelelo lokupholisa ngokukhawuleza kunye nokufudumeza.Inokumelana ne-corrosion eqinile kwizisombululo ze-acidic kunye ne-alkaline, ukuzinza kweekhemikhali ezigqwesileyo, kwaye ayithathi nxaxheba kuyo nayiphi na i-chemical reactions ngexesha lokunyibilika.Udonga lwangaphakathi lwe-graphite crucible luhamba kakuhle, kwaye ulwelo lwesinyithi olutyhidiweyo alukho lula ukuvuza kwaye lunamathele eludongeni lwangaphakathi lwe-crucible, okwenza ulwelo lwetsimbi lube nokuhamba kakuhle kunye nokukwazi ukuphosa, okufanelekileyo ukuphosa kunye nokwenza iintlobo ezahlukeneyo zokubumba.Ngenxa yeempawu ezigqwesileyo ezingentla apha, i-graphite crucibles isetyenziswa ngokubanzi kwi-smelting ye-alloy tool yensimbi kunye neensimbi ezingenayo i-ferrous kunye ne-alloys yazo.

Uhlobo
I-Graphite crucibles isetyenziselwa ukunyibilika kwezinto zetsimbi, ezahlulahlulwe zibe ziindidi ezimbini: igraphite yendalo kunye negraphite yokwenziwa.
1) Igraphite yendalo
Ikakhulu yenziwe nge-graphite ye-flake yendalo njengeyona nto iphambili, kunye nokongezwa kodongwe kunye nezinye izinto ezinqabileyo.Ngokuqhelekileyo ibizwa ngokuba yi-clay graphite crucible, ngelixa i-carbon binder type crucible yenziwe nge-asphalt njenge-binder.Yenziwa kuphela ngamandla odongwe atshisayo kwaye ibizwa ngokuba yi-Hui clay binder type crucible.Owokuqala unamandla aphezulu kunye nokumelana nokutshatyalaliswa kwe-thermal.Isetyenziselwa ukunyibilika kwentsimbi, ubhedu, ialloys zethusi, kunye nezinye iintsimbi ezingenayo intsimbi, ezinobukhulu obahlukeneyo kunye namandla okunyibilika ukusuka kwi-250g ukuya kwi-500kg.
Olu hlobo lwe-crucible lubandakanya izixhobo ezifana ne-spoon ye-skimming, i-lid, i-ring joint ring, inkxaso ye-crucible, kunye nentonga yokuvuselela.
2) Igraphite eyenziweyo
Iingqungquthela zendalo zegraphite ezikhankanywe ngasentla zihlala ziqulethe malunga ne-50% yeeminerali zodongwe, ngelixa ukungcola (i-ash content) kwi-graphite crucibles ye-artificial crucibles ingaphantsi kwe-1%, esetyenziselwa ukucokisa isinyithi esicocekileyo.Kukho kwakhona i-graphite ephezulu ecocekileyo eye yafumana unyango olukhethekileyo lokuhlanjululwa (i-ash content<20ppm).Iikhrafikhi ezenziweyo zegraphite zihlala zisetyenziselwa ukunyibilikisa izixa ezincinci zeentsimbi ezixabisekileyo, iintsimbi ezicocekileyo, okanye iindawo ezinyibilikisayo eziphezulu kunye neeoksidi.Inokusetyenziswa kwakhona njenge-crucible yohlalutyo lwegesi kwintsimbi.

Inkqubo yokuvelisa
Inkqubo yokwenziwa kwe-graphite crucibles inokwahlulwa ibe ziindidi ezintathu: ukubumba ngesandla, ukubunjwa okujikelezayo, kunye nokunyanzeliswa koxinzelelo.Umgangatho we-crucible uhambelana ngokusondeleyo kwindlela yokubumba inkqubo.Indlela yokwenza imisela ubume, ubuninzi, i-porosity, kunye namandla omatshini womzimba onqamlekileyo.
Ii-crucibles ezibunjwe ngesandla ngeenjongo ezikhethekileyo azikwazi ukubunjwa ngokusebenzisa iindlela zokujikeleza okanye ukunyanzeliswa.Ezinye ii-crucibles ezibunjiweyo ezikhethekileyo zinokuqulunqwa ngokudibanisa ukubumba okujikelezayo kunye nokubumba ngesandla.
Ukubumba okujikelezayo yinkqubo apho umatshini ojikelezayo unokuqhuba i-mold ukuba isebenze kwaye isebenzise imela yangaphakathi ukukhupha udongwe ukugqiba ukubumba kwe-crucible.
Ukubumba ukunyanzeliswa kukusetyenziswa kwezixhobo zoxinzelelo ezifana noxinzelelo lweoyile, uxinzelelo lwamanzi, okanye uxinzelelo lomoya njengamandla e-kinetic, usebenzisa iimbumba zentsimbi njengezixhobo zeplastiki zokwenza i-crucible forming.Xa kuthelekiswa nendlela yokubumba i-rotary, ineenzuzo zenkqubo elula, umjikelezo omfutshane wokuvelisa, isivuno esiphezulu kunye nokusebenza kakuhle, ukunyanzeliswa komsebenzi ophantsi, umswakama ophantsi wokubumba, ukuncipha kwe-crucible shrinkage kunye ne-porosity, umgangatho ophezulu wemveliso kunye nobuninzi.

Inkathalo kunye nokugcinwa
I-graphite crucibles kufuneka ikhuselwe kumswakama.I-graphite crucibles iyoyika kakhulu ukufuma, enokuthi ibe nefuthe elibalulekileyo kumgangatho.Ukuba isetyenziswe nge-crucible emanzi, inokubangela ukuqhekeka, ukugqabhuka, ukuwa komphetho, kunye nokuwa phantsi, okukhokelela ekulahlekelweni kwesinyithi esinyibilikisiweyo kunye neengozi ezinxulumene nomsebenzi.Ngoko ke, xa ugcina kwaye usebenzisa i-graphite crucibles, ingqalelo kufuneka ihlawulwe ekukhuseleni ukufuma.
Indawo yokugcina izibonda zegraphite kufuneka yome kwaye ingene umoya, kwaye ubushushu kufuneka bugcinwe phakathi kwe-5 ℃ kunye ne-25 ℃, kunye nokufuma kwe-50-60%.ama-crucibles akufanele agcinwe kumhlaba wezitena okanye umhlaba wesamente ukuphepha ukufuma.I-crucible ye-graphite eninzi kufuneka ifakwe kwisakhelo somthi, ngokukhethekileyo i-25-30cm ngaphezu komhlaba;Zipakishwe kwiibhokisi zeplanga, iingobozi zomthi, okanye iingxowa zestraw, iindawo zokulala mazibekwe phantsi kweepalethi, zingabi ngaphantsi kwe-20cm ukusuka emhlabeni.Ukubeka umaleko wokuziva kwi- sleepers kukulungele ngakumbi ukugquma ukufuma.Ngexesha elithile lokupakisha, kuyimfuneko ukupakisha i-stack ephantsi phezulu, ngokufanelekileyo kunye nemigangatho ephezulu kunye nezantsi ejongene nomnye.Ikhefu phakathi kokupakisha kunye nokupakisha akufanele kube lide kakhulu.Ngokuqhelekileyo, ukupakisha kufuneka kwenziwe kanye kwiinyanga ezimbini.Ukuba ukufuma komhlaba akukho phezulu, ukupakishwa kungenziwa kanye emva kweenyanga ezintathu.Ngamafutshane, ukupakishwa rhoqo kunokufezekisa isiphumo esihle sobungqina bokufuma.