Waa maxay noocyada lebenkii alumina sare inta badan ma lagu isticmaalo foornada warshadaha?

Lebenka aluminiumka sare waxa loola jeedaa badeecada sintered ka kooban in ka badan 348% Al2O aluminosilicate ama aluminium saafi ah. Guud ahaan, lebenka aluminiumka sare ayaa ka kooban wax ka yar 80% Al2O3, kuwa ka kooban in ka badan 80% Al2O3 waxaa loo yaqaan leben corundum. Marka la barbardhigo lebenka dhoobada ah, lebenka aluminiumka sare ayaa leh faa’iidooyinka muuqda ee refractorness sare iyo heerkulka jilcinta sare ee culeyska. Isticmaalka foornada warshadaha, lebennada aluminiumka sare ee caadiga ah waxay u kala baxaan shanta qaybood ee soo socota.

(1) Leben aluminium sare oo caadi ah

Halabuurka macdanta ugu muhiimsan ee lebenku waa mullite, corundum iyo wajiga galaaska. Maaddaama maaddada Al2O3 ee badeecaddu ay korodho, mullite iyo corundum ayaa sidoo kale kordhiya, marxaladda muraayadda ayaa hoos u dhigi doonta si waafaqsan, iyo dib-u-celinta iyo heerkulka sare ee badeecada ayaa kordhin doona si waafaqsan. Lebennada caadiga ah ee aluminiumku waxay leeyihiin taxane ah siyaalo iska caabin ah oo dabka ka fiican marka loo eego alaabta dhoobada, waana shay leh saameyno codsi oo wanaagsan iyo adeegsi badan. Waxaa si weyn loogu isticmaalaa kilnadaha kulaylka ee kala duwan. Marka la barbardhigo alaabta dhoobada ah, nolosha adeegga foornada waa la hagaajin karaa.

(2) Culays sare oo jilicsan leben aluminium sare ah

Marka la barbar dhigo lebenka sare ee alumina ee caadiga ah, leben-aluminium-fudud jilicsan oo sarreeya ayaa ku kala duwan qaybta matrixka iyo qaybta binderka: qaybta matrixka waxaa lagu daraa saddex-dhagax-dhagax, iyo isku-dhafka kiimikada ka dib marka la toogto waxay ku dhowdahay halabuurka aragtida mullite, kaas oo si macquul ah loo soo bandhigay Isticmaal walxaha aluminium-sare, sida budada corundum, budada corundum-aluminium sare, iwm.; dooro dhoobo wareegsan oo tayo sare leh oo ah wakiilka isku xidhka, oo isticmaal walxaha isku xidhan ee dhoobada ah ee kala duwan ama wakiilada isku xidhka badan ee ku xidhan noocyada kala duwan. Iyada oo loo marayo habka kor ku xusan, heerkulka jilcinta culeyska ee lebenka aluminiumka sare waxaa lagu kordhin karaa qiyaastii 50 ilaa 70 ° C.

(3) Leben aluminium sare gurguurta oo hooseeya

Hagaajinta iska caabbinta gurguurta ee lebennada aluminiumka ah ee sarreeya adiga oo qaadanaya waxa loogu yeero falcelinta aan dheelitirnayn. Taasi waa, marka loo eego heerkulka isticmaalka foornada, ku dar saddex-dhagax macdan ah, alumina firfircoon, iwm si aad u sameysid halabuurka matrixka u dhow ama gebi ahaanba mullite, sababtoo ah mulliteization ee shaxanka ayaa hubaal ahaan kordhin doona mullite. maaddada maaddada , Yaree nuxurka wejiga muraayadda, iyo farsamooyinka farsamada iyo kulaylka ee aadka u fiican ee mullite waxay ku habboon yihiin hagaajinta heerkulka sare ee qalabka. Si shaxanka si buuxda looga dhigo mid buuxa, xakamaynta Al2O3/SiO2 waa furaha. Lebenka aluminiumka ah ee gurguurta ee hooseeya ayaa si weyn loogu isticmaalaa foornooyinka qaraxa kulul, foornooyinka qaraxa iyo kilnnada kale ee kulaylka.

(4) Fosfate ku xidhan leben aluminium sare ah

Lebenka aluminium-ka sare leh ee fosfate-ku-xidhan ayaa laga sameeyay heer-sare-sare ama heerka koowaad-alumina bauxite clinker oo ah sheyga ugu weyn ee ceeriin, xalka fosfat ama aluminium fosfateed sida binder, ka dib qaabaynta saxafada qallalan ee semi-qallalan, daaweynta kulaylka 400 ~ 600℃ Alaabooyin kiimiko ku xidhan oo la soo saaray. Waa leben aan shidnayn. Si looga fogaado hoos u dhaca weyn ee alaabta inta lagu jiro isticmaalka, guud ahaan waa lagama maarmaan in la soo bandhigo alaabta ceeriin ee kuleylka-ballaadhinta, sida kyanite, silica, iwm., maaddooyinka. Marka la barbar dhigo dhoobada isku xidhan ee la shiday lebenka aluminiumka sare, waxqabadkeeda ka-hortagga ka-hortagga ayaa ka fiican, laakiin heerkulka jilcintiisa ayaa ka hooseeya, iska caabbinta daxalka ayaa liidata. Sidaa darteed, qadar yar oo corundum isku dhafan, mullite, iwm. ayaa loo baahan yahay in lagu daro si loo xoojiyo matrixka. Lebenka aluminiumka ah ee ku xidhan fosfate-ka ayaa si weyn loogu isticmaalaa foornada wareega sibidhka, saqafka foornada korontada iyo qaybaha kale ee foornada.

(5) Balaadhinta yar-yar ee leben aluminium sare ah

Lebenka ayaa inta badan laga sameeyaa bauxite-alumina-sare oo ah alaabta ceeriin ee ugu weyn, oo lagu daray saddex qaybood oo dhagax ah, waxaana loo sameeyay sida waafaqsan habka wax soo saarka ee lebenka aluminium-sare. Si aad si sax ah u balaadhiso lebenka aluminiumka sare ah inta lagu jiro isticmaalka, furaha waa in la doorto xoogga saddexda dhagax iyo xajmiga qaybtiisa, oo la xakameeyo heerkulka dabka, si qayb ka mid ah macdanta saddexda dhagax ah ee la doortay ay yihiin mulllite iyo qaar ka mid ah saddexda -Macaadin dhagax ah ayaa hadhay. Macdanta saddex-dhagaxa ah ee soo hadhay ayaa la sii kordhiyaa (mulliteized aasaasiga ah ama sare) inta lagu jiro isticmaalka, oo ay la socoto ballaarinta mugga. Macdanta saddex-dhagaxa ah ee la doortay ayaa doorbidaya waxyaabo isku dhafan. Sababtoo ah heerkulka kala go’a ee saddexda macdan ee dhagaxa ah waa ka duwan yahay, balaarinta ay keento petrochemical-ka mullite sidoo kale waa ka duwan yahay. Isticmaalka habkan, lebenka aluminiumka sare ayaa leh saameyn balaarineed oo u dhigma sababtoo ah heerkulka shaqada ee kala duwan. Tuujinta kala-goysyada lebenku waxay hagaajinaysaa isku-xidhnaanta guud ee jidhka dahaarka ah, taas oo hagaajinaysa iska caabbinta lebennada si ay u dhexgalka slag.