Refractory cement tseem hu uaCalcium Aluminate Cement, yog tsim los ntawm kev xaiv zoo bauxite thiab txiv qaub raws li cov khoom siv raw, uas tau ua tib zoo sib xyaw thiab sib xyaw rau hauv cov ntaub ntawv raw hauv ib qho kev faib ua feem. Cov ntaub ntawv nyoos no ces raug rau cov txheej txheem kub-kub sintering kom rho tawm aluminate ua lub ntsiab tivthaiv, thaum xyuas kom meej tias cov ntsiab lus ntawm alumina ncav cuag tus qauv ntawm li 50%, yog li tsim lub npe clinker.
Lub clinker yog finely hauv av thiab thaum kawg hloov mus rau hauv cov hmoov zoo, uas yog qhov peb hu ua refractories cement. Nws tsis tsuas yog muaj cov khoom zoo heev refractory, tab sis kuj yog cov khoom siv hydraulic cementing uas tuaj yeem tswj tau cov qauv ruaj khov thiab lub zog nyob rau hauv qhov kub thiab txias. Raws li qhov sib txawv ntawm cov khoom siv refractory, nws tau muab faib ua ntau qib xws li 625, 725, thiab 825. Feem ntau, cov khoom ntim khoom yuav qhia meej cov lus xws li "CA-50-625#", uas txhais tau hais tias nws refractoriness tsis tsawg dua 1580 degree, kom ntseeg tau tias kev ua tau zoo hauv ntau yam kev siv kub.
Dab tsi yog qhov txawv ntawm refractory cement thiab cov cement zoo tib yam?
① Qhov sib txawv ntawm qhov muaj pes tsawg leeg
Lub hauv paus ntawm refractories cement yog nyob rau hauv "refractory". Cov cement tshwj xeeb no yog ua tib zoo sib xyaw los ntawm cov ntaub ntawv kub-resistant xws li alumina, calcium oxide thiab silicon oxide. Cov ntaub ntawv no zoo li cov tub rog nyob rau hauv lub cub tawg me me, muaj peev xwm tuav tau lawv cov av nyob rau hauv qhov kub thiab txias ntawm ntau tshaj 1000 degree, uas qhia tau hais tias hluav taws zoo heev, hnav tsis kam thiab corrosion kuj. Txawm hais tias cov cement zoo tib yam kuj yog ib qho khoom siv tsis tseem ceeb rau kev tsim kho, nws muaj pes tsawg leeg xav tau kev tsim kho txhua hnub. Feem ntau yog ua los ntawm cov khoom siv xws li limestone, av nplaum thiab gypsum, nws tiv taus qhov kub thiab txias, feem ntau qis dua 100 degree. Txawm li cas los xij, nws tseem ci ntsa iab hauv kev tsim kho nrog nws txoj kev sib txuas zoo thiab ua haujlwm ntev.
② Kev sib piv ntawm lub cev thiab tshuaj ntsuas ntsuas
Tshuaj muaj pes tsawg leeg: Cov kub-kub resistant oxides nyob rau hauv refractory cement muab nws txawv txawv kub-kub kuj. Hauv qhov sib piv, cov khoom siv silicate ntawm cov cement zoo tib yam yog cov pa ntau dua.
Compressive zog: Nyob rau hauv ib tug high-kub ib puag ncig, lub zog ntawm nws tseem ruaj khov, thiab nws muaj peev xwm qhia tau zoo heev kev ua tau zoo piv rau cov cement zoo tib yam.
Shrinkage: Nyob rau hauv qhov kub thiab txias, lub shrinkage ntawm refractories cement yog qis dua li cov cement zoo tib yam, uas yuav pab tswj kev ruaj ntseg ntawm cov qauv.
③ Kev sib txawv ntawm cov sijhawm thov
Refractory cement, zoo li tus tub rog uas tsis muaj kev ntshai, feem ntau tau tso siab rau cov haujlwm tseem ceeb thiab nyob rau hauv qhov kub thiab txias thiab corrosive ib puag ncig xws li lub qhov cub, qhov cub, qhov cub, thiab lub qhov cub kub rau lub sijhawm ntev. Nws cov kev ua tau zoo tuaj yeem tiv thaiv cov qauv ntawm kev puas tsuaj los ntawm qhov kub thiab txias thiab corrosion. Ordinary cement, zoo li tus kws tsim vaj tsev yooj yim, ntsiag to ua haujlwm ntawm kev tsim vaj tsev thiab kev tsim kho vaj tse xws li tsev, txuas hniav, txoj kev, thiab cov vaj tse pob zeb. Nws muab lub hauv paus ruaj khov rau cov qauv no nrog nws txoj kev sib txuas ruaj khov thiab ruaj khov. Txawm li cas los xij, txawm hais tias cov khoom siv refractory cement ua tau zoo nyob rau hauv qhov kub thiab txias, peb yuav tsum tau ua kom pom tseeb tias nyob rau hauv cov nqe lus ntawm load-bearing structures, cov cement zoo tib yam muaj kev sib txuas zoo dua thiab cov khoom siv kho tshuab. Yog li ntawd, thaum xaiv cov cement, peb yuav tsum tau txiav txim siab zoo raws li cov kev xav tau tshwj xeeb engineering thiab kev siv ib puag ncig.
