Hnub Kawg:4,Lub Xya Hli,2022
Qee cov khoom siv hluav taws xob ua haujlwm ntev ntev hauv 900 ℃ - 1100 ℃ kub lub xeev ntawm kev ua haujlwm, cov ntaub ntawv refractory ntawm qhov kub no yog qhov nyuaj rau kev ua tiav ceramic sintering lub xeev, cuam tshuam rau kev ua haujlwm ntawm cov khoom siv refractory, sodium hexametaphosphate hauv refractory castable, tshuaj tsuag hauv kev siv. kev ua tau zoo ntawm qhov kom zoo dua yog qhov ruaj khov zoo compressive zog thiab hnav tsis kam thiab thermal poob siab, Ib yam khoom uas yuav pab ntxiv dag zog rau cov qauv kev khi ntawm refractories, cia powdery los yog granular refractories sib txuas ua ke kom pom lub zog txaus.
Nyob rau hauv lub sij hawm ntev tsim cov khoom siv, boiler, piv txwv li, vim qhov kub ntawm qhov hluav taws xob fluidization tshaj tawm, qhov kub ntawm lub qhov cub hauv ob sab phlu refractory muaj zog yaig, hnav, tshwj xeeb tshaj yog nyob rau hauv cov cheeb tsam xws li lub boiler combustion chamber thiab cyclone separator nyob rau hauv grain, huab cua txaus thiab haus luam yeeb nruab nrab hnav thiab thermal shock effect, ua rau refractory hauv ob sab phlu yaig, hnav, tev tawm thiab tawg, Nws cuam tshuam rau kev ua haujlwm ib txwm thiab ntau lawm ntawm boilers.
Yog li ntawd, nws yog ib qho tsim nyog los tsim ib hom tshiab ntawm binder nrog kub tsis kam, yaig tsis kam, hnav tsis kam thiab thermal poob siab los txhim kho kev ua haujlwm ntawm cov ntaub ntawv refractory.
Sodium hexametaphosphate muaj qhov zoo nyob rau hauv daim ntawv thov ntawm refractory castable, tshuaj tsuag muab tub lim, los ntawm kev xaiv ntawm qhov muaj pes tsawg leeg thiab kev npaj cov txheej txheem tsis, lub binder yog ncua kev kawm ntawv thiab dispersion system nrog nruab nrab pH nqi, tsis tsuas muaj zog adhesion thiab tsis-corrosive rau cov hlau. matrix, kub tsis kam thiab non-inorganic binder daim ntawv thov kub ntau yog dav. Sodium hexametaphosphate yog hydrolyzed rau sodium dihydrogen phosphate (NaH2PO4) thaum siv los ua cov ntawv khi rau hauv refractory castable thiab tshuaj tsuag muab tub lim.
NaH2PO4 thiab alkaline ntiaj teb hlau oxides, xws li magnesia, tuaj yeem hnov qab ntawm chav tsev kub kom tsim Mg (H2PO4) 2 thiab MgHPO4, uas tuaj yeem ua rau hauv magnesium phosphate [Mg (PO3) 2] N thiab [Mg2 (P2O7)] N feem. los ntawm cua sov ntawm li 500 ℃. Lub zog ntawm kev sib xyaw ua ke yog txhim kho ntxiv. Nws muaj lub zog siab tshaj qhov kub ntau (txog 800 ℃) ua ntej qhov rov tshwm sim ntawm cov kua theem.
Sodium hexametaphosphate feem ntau yog siv los ua cov ntawv khi rau magnesia thiab magnesia chrome unfired cib, castables thiab cov khoom siv phom sij. Nyob rau hauv kev npaj ntawm castable, lub concentration ntawm nws aqueous tov yuav tsum tau xaiv 25% ~ 30% yog tsim nyog, thiab tus nqi ntawm ntxiv yog feem ntau 8% ~ 18%. Nyob rau hauv qhov kev pom zoo ntawm kev ua haujlwm ntawm kev sib tov, nws yuav tsum tau siv tsawg li sai tau kom ntseeg tau tias qhov kub thiab txias ntawm cov khoom siv. Cov coagulant yuav yog aluminate cement lossis lwm yam khoom siv calcium.
Cov ntaub ntawv refractory yog cov ntaub ntawv tseem ceeb rau cov hlau thiab hlau, cov khoom siv hauv tsev, cov hlau tsis muaj hlau, petrochemical, tshuab, hluav taws xob, kev tiv thaiv ib puag ncig thiab lwm yam kev lag luam kub. Sodium hexametaphosphate binder kuj yog ib qho tseem ceeb ntawm cov ntaub ntawv tseem ceeb rau ntau yam khoom siv hluav taws xob thermal thiab cov khoom siv kub kub.
Lub sij hawm xa tuaj: Plaub Hlis-05-2022
