Tsis ntev los no, qhov kub thiab txias tau qis dua, yog li kev tsim kho ntau yuav raug cuam tshuam, feem ntau nyob rau hauv cov duab ntawm refractory castables. Ntawm no, Topower muaj qee cov lus qhia rau lub caij ntuj no refractory castables tsim.
Xws li aluminium acid ntsev av, Portland cement thiab zoo tib yam Portland cement nyob rau hauv lub caij ntuj sov yuav siv tau rau cementing tus neeg sawv cev ntawm refractory castable, nyob rau hauv lub caij ntuj no, nws hais txog yuav tsum xub xaiv aluminate cement, vim hais tias cov aluminate cement nrog ib tug ceev hardening, siab zog, refractory thiab Cov yam ntxwv ntawm sulfate yaig tsis kam, lub caij ntuj no siv cement refractory castable yog cov cementing zoo. Nws ntau hom muaj CA-50 cement, CA-60 cement, CA-70 cement, CA-80 cement. Lwm cov slag Portland cement, volcanic limestone Portland cement, ya tshauv Portland cement kuj siv tau, daim ntawv lo tsis tsawg dua 42.5. Tshwj xeeb tshaj yog thaum lub caij ntuj no kev tsim kho siv thaum ntxov nws tsis muaj zog cement, nws daim ntawv lo yuav tsum tsis pub tsawg tshaj 42.5.
Nyob rau hauv cov txheej txheem ntawm refractory castables, dej phwj tuaj, dej hiav txwv thiab dej uas muaj teeb meem impurities yuav tsum tsis txhob siv.
Ntawm qhov tod tes, kev tsim kho thiab cov txheej txheem hardening ntawm refractory castables yuav raug cuam tshuam, thiab ntawm qhov tod tes, qhov kub thiab txias kev ua haujlwm ntawm refractory castables yuav raug txo thiab qhov ntsuas yuav tsis ncav cuag. Qhov tob ntawm chloride ions hauv dej siv yuav tsum tsis txhob ntau tshaj 300mg / L.
Nyob rau hauv tus txheej txheem ntawm pouring kev tsim kho, tib neeg kuj yuav tsis quav ntsej qhov kub ntawm qhov chaw nyob rau hauv kev sib cuag nrog lub castable, vim hais tias nyob rau hauv lub caij ntuj no kev tsim kho, qhov kub ntawm lub castable nws tus kheej yuav tswj tau, tab sis yog hais tias qhov kub ntawm qhov kev sib cuag nto yog tsawg heev. nws yuav ua rau kom poob sai sai hauv qhov kub thiab txias ntawm cov castable tshiab tshiab, cuam tshuam rau kev loj hlob ntawm lub zog ntawm castable. Vim hais tias nws tau teev nyob rau hauv tus qauv hais tias qhov kub ntawm qhov chaw nyob rau hauv kev sib cuag nrog refractory castable yuav tsum tsis txhob tsawg tshaj li 5 degree.
Noj cov refractory castable ua ke nrog calcium aluminate cement ua piv txwv, qhov kub thiab txias tsis zoo yog qhov tsis zoo rau kev tsim kho ntawm castable. Tsawg ambient kub, qeeb hydration cov tshuaj tiv thaiv ntawm cement, cuam tshuam kev loj hlob ntawm castable zog. Thaum qhov kub thiab txias qis dua 0 degree, cov dej dawb yuav pib khov, qhov kub nce mus txog -15 degree, cov dej dawb yuav luag tag nrho cov khov rau hauv dej khov, ua rau cov dej khov thiab tawv ntawm cov cement kiag li nres. . Thaum cov dej hloov mus rau hauv cov dej khov khov, nws qhov ntim tau nce li ntawm 9 feem pua, uas ua rau muaj kev ntxhov siab sab hauv ntawm cov khoom siv castable, txheeb ze ntawm cov khoom sib xyaw thiab cov cement thiab cov av noo nkag mus rau qhov kub tsis zoo. Kev tsim ntawm cov dej khov polymers hauv cov castable tuaj yeem ua rau cov qauv hauv zos tsis ua haujlwm. Cov dej muaj qhov siab tshaj plaws ntawm 4 degree. Thaum qhov kub poob qis dua 4 degree, qhov tseeb ntim ntawm cov dej tau pib nthuav dav, uas yuav ua rau muaj kev puas tsuaj rau cov qauv tsim tshiab cement hydrate ntawm cov castable.
Amorphous refractory castable rau qhov chaw tom qab frostbite cov khoom txias saum npoo dej khov, kauv kab, xim dawb, qhov tshwm sim tsis sib xws, xws li cov khoom zoo li ntub dej, tsaus ntug ntug, Lub kaum sab xis, nws yooj yim tawg, ntug ntawm lub qhov nrog lub qhov muag liab qab tuaj yeem pom. aggregate zes thiab hauv qab ntawm cov dej khov muaju, tsis yooj yim, nrog cov hlau (txheej txheem thauj tog rau nkoj) yuav luag tsis muaj zog cohesive, cov khoom nyob rau hauv muaj ntau qhov pores loj. Yog li ntawd, kev tsim kho lub caij ntuj no muaj kev cuam tshuam ntau dua rau amorphous refractories. Los ntawm condensation hardening, tsis tshua muaj kub, condensation hardening ceev yog qeeb, duab ntxoov ntxoo suab siv ceev. Thaum qhov kub thiab txias tsis zoo, tsis tsuas yog tuaj yeem ua tsis tau zoo li qub, tab sis kuj yuav muaj kev cuam tshuam tsis zoo rau cov qauv tsim.
Unshaped refractories suav nrog kev sib xyaw thiab kev thauj mus los ua ntej kev tsim kho. Lub tshav kub tau txais los ntawm cua sov cov khoom thaum nws yog nplawm yuav tsum tau txo kom tsawg thaum thauj. Xws li kev xaiv cov kev tsim nyog ntawm kev thauj mus los, txo tus naj npawb ntawm kev ua haujlwm, txo qhov kev thauj mus los, thiab lwm yam.
Tom qab kev tsim kho ntawm amorphous refractory castable nyob rau lub caij ntuj no, lub tshav kub ntawm cov khoom nws tus kheej thiab cov hydration thaum tshav kub kub tso tawm tom qab cement hydration yuav tsum tau siv tag nrho rau kev tu, thiab ib feem ntawm cov cua sov yuav tsum tau ntxiv thaum tsim nyog. Cov txheej txheem ntawm kev ntxiv cua sov yog:
(1) Txoj kev khaws cia kub. Lub thermal rwb thaiv tsev npog cov khoom siv hauv kev saib xyuas yuav tsum yog cov thermal conductivity tsawg, zoo sealing, windproof, noo noo-pov thawj, lub teeb yuag, tsis tshua muaj nqi thiab tuaj yeem siv rau ntau yam kev hloov pauv. Muaj cov rwb thaiv tsev thermal uas ua los ntawm ethylene ua npuas ncauj, yas li txheej txheej, thermal rwb thaiv tsev nrog cov tub ntxhais ua npuas ncauj sab hauv, thiab cov hluav taws kub rwb thaiv tsev phaj nrog lub teeb steel raws li tus ncej. (2) txoj kev tsev cog khoom. Lub tsev kawm ntawv yuav raug kaw, thiab ib qho chaw cua sov, kom lub tsev los tswj qhov kub thiab txias. (3) cua kub curing txoj kev. Muaj cov cua kub cua sov, chav cua sov, cua kub cua sov, cua sov infrared thiab hluav taws xob cua sov, thiab lwm yam.
Tsis tas li ntawd, cov tshuaj tiv thaiv kab mob los yog coagulant tuaj yeem muab ntxiv rau qhov tsis xwm yeem refractory castables. Piv txwv li, aluminate cement ua ke refractory castables feem ntau siv lithium ntsev, sodium ntsev kom ceev lub hardening ntawm castables; Sodium fluorosilicate feem ntau yog siv los ua tus neeg sawv cev tawv rau sodium silicate bonded castables. Magnesium hmoov thiab aluminate cement feem ntau yog siv los ua hardeners rau phosphate bonded castable los yog ramming cov ntaub ntawv.
