Hauv kev nrhiav kev ua kom tiav ntawm kev ua neej thiab siv cov yam ntxwv ntawmGraphite shregles, peb lub Hoobkas tau ua cov kev tshawb fawb dav dav thiab tshawb nrhiav hauv lawv cov khoom lag luam thiab kev ua haujlwm. Nov yog cov lus qhia ua haujlwm rau Graphite Crucas crucles:
Kev ceev faj tshwj xeeb rau cov qib siab-purity graphite crucibles:
Zam kev cuam tshuam kho tshuab thiab tsis txhob poob lossis tawm tsam tus ntoo khaub lig crucible los ntawm qhov siab. Thiab kom nws qhuav thiab tshem tawm cov dej noo. Tsis txhob kov cov dej tom qab nws tau ua kom sov thiab qhuav.
Thaum siv, tsis txhob ncaj qha cov nplaim ci ncaj qha mus rau tus crucible lub hauv qab. Kev nthuav tawm ncaj qha rau cov nplaim hluav taws tuaj yeem tawm cov cim dub.
Tom qab kaw lub cub tawg, tshem tawm ib qho seem seem lossis tooj liab khoom los ntawm cov ntoo khaub zig crucible thiab tsis txhob tawm hauv txhua qhov chaw seem.
Siv cov tshuaj acidic (xws li flux) hauv kev sim kom tiv thaiv corroding thiab tawg ntawm crucible.
Thaum cov ntaub ntawv ntxiv, zam kev ntaus tus ntoo khaub lig crucible thiab tsis kam los ntawm kev siv cov quab yuam.
Cia thiab hloov cov graphite cruciles:
High-purity graphite crucibles yog nkag siab txog dej, yog li lawv yuav tsum tau tiv thaiv los ntawm dej dampness thiab dej raug.
Them sai sai kom tsis txhob muaj kev puas tsuaj saum npoo. Tsis txhob tso tus crucible ncaj qha rau hauv pem teb; Hloov chaw, siv pallet lossis pawg board.
Thaum txav lub crucible, zam dov nws ib sab ntawm hauv pem teb. Yog tias nws yuav tsum tau tig ntsug kab ntsug, tso cov duab los tuab lossis ntaub thaiv hauv av kom tiv thaiv cov khawb lossis ua paug rau hauv qab.
Thaum hloov pauv, saib xyuas tshwj xeeb kom tsis txhob poob lossis tawm tsam tus ntoo khaub zig.
Installation ntawm graphite crucosles:
Lub Crucible Sawv (Crucible platform) yuav tsum muaj tib yam lossis loj dua txoj kab uas yog lub crucible hauv qab. Qhov siab ntawm lub platform yuav tsum siab dua cov nplaim hluav taws xob kom tiv thaiv cov nplaim hluav taws los ntawm kev mus txog Crucible ncaj qha.
Yog tias siv cov cib regractory rau lub platform, Condular Clock yog nyiam, thiab lawv yuav tsum yog tiaj tus yam tsis muaj dab tsi khoov. Zam kev siv ib nrab lossis tsis sib luag, thiab nws raug nquahu kom siv cov platform graphite.
Place the crucible stand at the center of melting or annealing, and use carbon powder, rice husk ash, or refractory cotton as a cushion to prevent the crucible from sticking to the stand. Tom qab muab cov crucible, kom nws yog theem (siv tus Ntsuj Plig).
Xaiv lub haum cruciBles uas tau tshaj nrog lub cub tawg, thiab ua kom muaj kev sib txawv uas tsim nyog (tsawg kawg (40mm) ntawm tus ntoo khaub lig crucible thiab phab ntsa.
Thaum siv tus ntoo khaub lig nrog spucible nrog sproout, tawm ib qho chaw ntawm kwv yees li 30-50mm ntawm spout thiab lub refractory cib hauv qab no. Tsis txhob tso dab tsi hauv qab, thiab siv refractory refrory kev sib txuas ntawm spout thiab phab ntsa rauv. Phab ntsa cub hluav taws yuav tsum tau kho cov cib refractory (peb lub ntsiab lus), thiab ib daim duab qhia d recrugatic txog 3mm tuab yuav tsum tau muab tso rau hauv lub crucible kom tso cai rau kev nthuav dav tom qab cua sov.
Preheating thiab qhuav ntawm graphite crucas crucles:
Preheat nyob ze cov roj rauv rau 4-5 teev ua ntej siv los pab rau kev tshem tawm cov ntoo noo los ntawm cov ntoo khaub zig.
Rau cov crucibles tshiab, tso cov roj hluav taws xob lossis ntoo hauv Crucible thiab hlawv nws li kwv yees li plaub teev los pab tshem kom noo noo.
Cov caij cua sov pom zoo rau cov ntoo ci ci tshiab raws li nram no:
0 ℃ Rau 200 ℃: maj mam tsa qhov kub tshaj 4 teev.
Rau cov roj rauv taws: nce qhov kub thiab txias qeeb rau 1 teev, txij 0 ℃ txog 300 ℃, thiab xav tau 4Hours ntawm200 ℃,
Rau cov hluav taws xob hluav taws xob: Xav tau 4 teev kub lub sijhawm los ntawm 300 ℃ rau 800 ℃, tom qab ntawd 4 teev ntawm 300 ℃ rau 400 ℃. los ntawm 400 ℃ rau 600 ℃, nce qhov ntsuas kub thiab ceev nrawm dua 2 teev.
Tom qab kaw lub cub hluav taws xob, cov lus pom zoo kom rov ua kom zoo li yav dhau los yog raws li hauv qab no:
Rau roj thiab hluav taws xob tshuab hluav taws: Xav tau 1 teev kub lub sijhawm los ntawm 0 ℃ txog 300 ℃. Xav tau 4 teev lub sijhawm cua sov los ntawm 300 ℃ rau 600 ℃. Sai sai nce qhov kub mus rau theem yam xav tau.
Them Khoom Siv:
Thaum siv siab-purity graphite crucibles, pib los ntawm kev ntxiv cov ntaub ntawv me me ua ntej ntxiv cov ntawv loj dua. Siv tus nplaig kom zoo thiab ntsiag to muab cov ntaub ntawv rau hauv Crucible. Zam kev hla kev ntawm tus ntoo khaub lig crucible kom tiv thaiv nws los ntawm kev tawg.
Rau cov roj Furnaces, cov ntaub ntawv tuaj yeem raug ntxiv tom qab ncav 300 ℃.
Rau cov hluav taws xob hluav taws xob hluav taws xob:
Txij li 200 ℃ txog 300 ℃, pib ntxiv cov ntaub ntawv me me. Los ntawm 400 ℃ onward, maj ntxiv cov khoom loj dua. Thaum cov ntaub ntawv ntxiv thaum lub sijhawm ua lag luam nruam, zam kev ntxiv rau hauv tib txoj hauj lwm kom tiv thaiv oxidation ntawm lub qhov ncauj Crucibation.
Rau rwb thaiv tsev hluav taws xob cov tshuab hluav taws xob ua kom sov, preheat rau 500 ℃ ua ntej pour txhuas yaj.
Ceev faj thaum lub sijhawm siv cov graphite crucle:
Nqa cov ntaub ntawv nrog kev saib xyuas thaum ntxiv rau lawv rau cov crucible, zam kev sib haum xeeb kom tiv thaiv tus ntoo khaub lig crucible.
Rau cov cruciles tsis tu ncua tau siv rau 24 teev, lawv lifespan yuav txuas ntxiv. Thaum kawg ntawm hnub ua haujlwm thiab cov khoom siv hluav taws xob kaw, cov khoom siv ua kom tsis txhob raug tshem tawm thiab nthuav ntxiv, uas tuaj yeem ua rau crucible deformation lossis tawg.
Thaum siv cov neeg sawv cev melting (xws li fllux rau aluminium alloys lossis borax rau cov roj copning tooj liab), siv sparingly kom tsis txhob corroding phab ntsa Crucible. Ntxiv cov neeg sawv cev thaum lub txhuas yaj yog li 8 feeb deb ntawm kev ua kom tag nrho, maj mam muab nplawm kom txhob los tiv thaiv lawv cov phab ntsa Crucible.
NCO TSEG: Yog hais tias tus neeg sawv cev melting muaj ntau dua 10% sodium (na) cov ntsiab lus, crucible tshwj xeeb ua los ntawm cov ntaub ntawv tshwj xeeb.
Thaum kawg ntawm txhua hnub ua haujlwm, thaum lub crucible tseem kub, kom muaj kev hloov pauv ntawm Crucle mus rau lub sijhawm ua kom sov thiab lub sijhawm ntev thiab muaj peev xwm tawg.
Nws raug nquahu kom tshawb xyuas cov kab ntoo uas muaj li txhua ob lub hlis rau aluminium alloys (txhua lub lim tiam rau cov taum alloys). Kuaj xyuas sab nraud thiab ntxuav cov cub hluav taws xob. Tsis tas li ntawd, tig cov crucible kom ntseeg tau txawm tias hnav, uas pab txuas rau lub neej ntawm cov nyom graphibles crucai.
Los ntawm kev ua raws li cov kev ua haujlwm ua haujlwm no, cov neeg siv tuaj yeem ua haujlwm ntau dhau ntawm lawv cov teeb meem zoo, ua kom muaj txiaj ntsig zoo hauv kev siv ntau yam.
Lub Sijhawm Post: Jul-10-2023