Sida Loo Doorto Lebenka Chrome-ka ee Magnesia Iyada oo Ku Salaysan Astaamaha Foornada

Lebennada chrome-ka ee Magnesiawaa agab lagama maarmaan u ah foornooyinka heerkulka sare leh, oo si weyn loogu isticmaalo foornooyinka wareega ee sibidhka, foornooyinka sameynta birta, foornooyinka birta aan birta ahayn iyo foornooyinka galaaska. Waxqabadkoodu wuxuu si toos ah u go'aamiyaa cimriga adeegga foornada, hufnaanta hawlgalka iyo badbaadada wax soo saarka. Si aad u doorato lebenka chrome-ka ee saxda ah ee magnesia, waa inaad si buuxda ula jaanqaaddaa sifooyinkooda shaqada ee foornada - tani waa furaha lagu dhimayo kharashyada dayactirka iyo kordhinta faa'iidooyinka hawlgalka.

Marka hore, diiradda saar heerkulka shaqada ee foornada. Foornooyinka kala duwan waxay leeyihiin shuruudo heerkul oo kala duwan: aagagga gubashada foornada wareega ee sibidhka waxay gaaraan 1500–1650°C, halka foornooyinka korontada ee sameeya birta ay ka badnaan karaan 1700°C. Lebennada chrome ee tayada sare leh ee magnesia waa inay lahaadaan iska caabin ka badan 2000°C iyo heerkul jilcinaya culayska oo ka sarreeya 1550°C si ay u ilaaliyaan hufnaanta qaab-dhismeedka heerkulka sare ee muddada dheer. Foornooyinka heerkulka aadka u sarreeya, dooro lebennada chrome ee magnesia ee dib loo xidhay oo leh xasillooni heerkul sare oo aad u fiican.

Marka labaad, tixgeli deegaanka kiimikada ee foornada. Foornooyinka farsameeya walxaha alkaline (sida clinker-ka sibidhka) waxay u baahan yihiin leben leh iska caabin alkali oo xooggan, halka kuwa gacanta ku haya birta dhalaalaysa ama slag-ka aashitada leh ay u baahan yihiin iska caabin wanaagsan oo daxalka aashitada ah. Magnesia (MgO) ee birlabka chrome ee birlabka leh waxay bixisaa iska caabin alkali ah, halka chromium oxide (Cr₂O₃) ay xoojiso iska caabinta aashitada, taasoo ka dhigaysa kuwo ku habboon deegaannada kiimikada ee adag. Foornooyinka leh nabaad-guurka slag ee soo noqnoqda, dooro lebenka daloolada yar (porosity <20%) si looga hortago gelitaanka slag-ka.

Saddexaad, qiimee iska caabbinta shoogga kulaylka iyadoo lagu saleynayo isbeddelka heerkulka. Foornooyinka leh wareegyada joojinta-soo-noqnoqda ee soo noqnoqda (sida foornooyinka dhalaalka ee aan birta ahayn) waxay u baahan yihiin lebenno u adkeysan kara isbeddellada heerkulka degdega ah iyagoon dildilaacsanayn. Lebennada magnesia chrome ee nus-dib loo xidho waxay bixiyaan iska caabbin shoogga kulaylka oo aad u fiican, taasoo ka dhigaysa kuwo ku habboon xaaladaha noocaas ah, halka noocyada tooska ah ee isku xidhan ay dheelitiraan waxqabadka iyo kharashka foornada heerkulka deggan.

Intaa waxaa dheer, nooca lebenka ku habboon meelaha gaarka ah ee foornada. Meelaha u nugul xirashada sida afka foornada ama khadadka dhoobada, dooro leben xoog badan oo leh xoog burburin qabow ≥35MPa. Dahaarka joogtada ah, lebenka chrome-ka caadiga ah ee magnesia-ga ee kharash-ool ah ayaa si fiican u shaqeeya, halka dahaarka shaqada ee muhiimka ah ay u baahan yihiin noocyo toos ah ama dib loo xidho oo waxqabad sare leh.

Doorashada lebenka chrome-ka ee magnesia ee saxda ah kuma saabsana oo keliya tayada agabka - waa ku saabsan isku-habaynta saxda ah ee sifooyinka foornada. Lebenkayaga chrome-ka ee tayo sare leh ee magnesia, oo laga heli karo noocyo kala duwan iyo cabbirro gaar ah, waxaa loo sameeyay inay daboolaan baahiyaha foornada ee kala duwan, iyagoo hubinaya cimri dheer iyo hawlgal deggan. Nala soo xiriir maanta si aad u hesho xal loogu talagalay foornadaada.