Nyob rau hauv kev tsim thiab txij nkawm ntawm high-temperature industrial khoom, refractory castables ua lub luag haujlwm tseem ceeb. Raws li ib yam ntawm cov tseem ceeb,low-cement refractory castablesyog dav siv nyob rau hauv ntau yam high-temperature ib puag ncig vim lawv cov yam ntxwv kev ua tau zoo. Qhia cov yam ntxwv ntawm peb qhov sib txawv qis cement castables kom nkag siab zoo dua thiab siv cov ntaub ntawv no.
1. Alumina-silicate low-cement refractory castables
Alumina-silicate low-cement refractory castables yog ua los ntawm alumina-silicate refractory cov ntaub ntawv ua cov ntaub ntawv tseem ceeb. Lawv yog tsim los ntawm kev ntxiv cov nqi qis ntawm cov cement binders, refractory aggregates thiab refractory hmoov, thiab lwm yam, thiab yog tsim los ntawm kev sib tov, nplawm, molding, thiab kho cov txheej txheem. Cov castable no muaj qhov ua tau zoo ntawm qhov kub thiab txias, thiab nws cov refractoriness tuaj yeem ncav cuag siab tshaj 1790 degree, thiab nws tuaj yeem tswj kev ua haujlwm ruaj khov rau lub sijhawm ntev hauv qhov chaw kub kub. Tsis tas li ntawd, alumina-silicate low-cement refractory castables kuj muaj cov thermal poob siab zoo, uas tuaj yeem tiv thaiv thermal expansion thiab contraction nyob rau hauv high-temperature cov cuab yeej, yog li ua rau cov kev pab cuam lub neej ntawm cov khoom.
Nyob rau hauv cov nqe lus ntawm lub cev khoom, aluminium silicate tsawg cement refractory castables muaj siab compressive zog thiab flexural zog. Nrog rau qhov nce ntawm qhov kub thiab txias, nws lub zog nce ntxiv, thiab lub zog ntawm 1500 degree yog li ob npaug ntawm lub zog ziab. Tsis tas li ntawd, lub zog flexural ntawm cov castable ntawm qhov kub ntawm 1400 degree tuaj yeem ncav cuag 1.5 ~ 2.3MPa, uas yog ze li ob zaug siab dua li cov tsoos CA-50 cement refractory castable. Cov cuab yeej zoo heev no ua rau txhuas silicate qis cement refractory castables muaj ntau yam kev thov kev cia siab nyob rau hauv high-temperature industrial khoom.
Nyob rau hauv cov nqe lus ntawm thermal expansion kev ua tau zoo, aluminium silicate tsawg cement castables qhia nthuav cov yam ntxwv thoob plaws hauv cov txheej txheem cua sov. Nrog rau qhov nce ntawm cov cua sov, qhov thermal expansion nce zuj zus, ncav cuag tus nqi siab tshaj ntawm {{0}}.68% ntawm 1250 degree . Tom qab ntawd, nws pib qeeb qeeb, nrog lub thermal expansion ntawm 0.43% ntawm 1400 degree, thiab thaum kub yog 1500 degree, thermal expansion tus nqi nce rov qab mus rau 0.5%. Qhov nruab nrab thermal expansion tus nqi pab txo qis kev ntxhov siab thiab tawg los ntawm kev hloov pauv kub, yog li txhim kho cov refractoriness thiab thermal shock kuj ntawm cov castable.
2. High-aluminium low-cement refractory castable
High-aluminium low-cement refractory castables yog ua los ntawm high-aluminium refractory cov ntaub ntawv raws li cov ntaub ntawv tseem ceeb, thiab kuj yog tsim los ntawm kev ntxiv cov nqi tsim nyog ntawm low-cement binders, refractory aggregates thiab refractory hmoov. Qhov no castable muaj siab refractoriness thiab thermal shock tsis kam, thiab tuaj yeem tswj kev ua haujlwm ruaj khov hauv qhov kub thiab txias.
Nyob rau hauv cov nqe lus ntawm lub cev khoom, high-aluminium low-cement refractory castables kuj muaj siab compressive zog thiab flexural zog. Nws lub zog nce ntxiv nrog qhov nce ntawm cov cua sov, tshwj xeeb tshaj yog nyob rau hauv nruab nrab qhov kub thiab txias, uas qhia tau hais tias muaj zog ntxiv zog. Tsis tas li ntawd, cov castable kuj muaj qhov hnav tsis kam thiab yaig tsis kam, thiab tuaj yeem tswj kev ua haujlwm ruaj khov rau lub sijhawm ntev hauv qhov chaw hnyav xws li cov dej kub kub thiab cov khoom siv kho tshuab.
Nyob rau hauv cov nqe lus ntawm thermal expansion kev ua tau zoo, high-aluminium low-cement refractory castables kuj qhia nthuav cov yam ntxwv. Txawm li cas los xij, piv nrog aluminium silicate castables, nws cov thermal expansion tus nqi me dua thiab cov kev hloov pauv ruaj khov dua. Qhov kev ua haujlwm ruaj khov thermal nthuav dav no pab txo qis qhov hloov pauv thiab kev ntxhov siab ntawm cov castable ntawm qhov kub thiab txias, yog li txhim kho nws cov refractoriness thiab kev pab cuam lub neej.
3. Alumina low-cement refractory castable
Alumina low-cement refractory castable yog ua los ntawm alumina ua cov khoom siv tseem ceeb thiab muaj cov refractoriness siab heev thiab zoo heev thermal shock kuj. Qhov castable no tuaj yeem tswj tau qhov kev ua haujlwm ruaj khov rau lub sijhawm ntev hauv qhov kub thiab txias ib puag ncig thiab yog ib qho ntawm cov khoom siv tseem ceeb hauv cov khoom siv kub kub.
Nyob rau hauv cov nqe lus ntawm lub cev muaj zog, alumina tsawg cement castables muaj siab compressive zog thiab flexural zog. Nws lub zog nce ntxiv nrog qhov nce ntawm cov cua sov, tshwj xeeb tshaj yog nyob rau hauv qhov kub thiab txias, uas qhia tau hais tias muaj zog ntxiv zog. Tsis tas li ntawd, cov castable kuj muaj cov khoom zoo xws li hnav tsis kam thiab kev ua haujlwm zoo, nrog rau cov thermal conductivity tsawg thiab linear expansion coefficient.
Nyob rau hauv cov nqe lus ntawm thermal expansion kev ua tau zoo, alumina low-cement refractory castable kuj qhia tau hais tias nthuav cov yam ntxwv, tab sis lub thermal expansion tus nqi me me thiab qhov kev hloov yog ruaj khov. Qhov kev ua haujlwm ruaj khov thermal nthuav dav no pab txo qis qhov hloov pauv thiab kev ntxhov siab ntawm cov castable ntawm qhov kub thiab txias, yog li txhim kho nws cov refractoriness thiab kev pab cuam lub neej.
Peb qhov sib txawv qis-cement refractory castables muaj lawv tus kheej cov yam ntxwv thiab qhia cov yam ntxwv ua tau zoo hauv kev kub siab, thermal shock resistance, lub cev muaj zog thiab thermal expansion kev ua tau zoo. Hauv kev siv cov tswv yim, hom kev tsim nyog ntawm castable yuav tsum raug xaiv raws li qhov tshwj xeeb siv ib puag ncig thiab cov kev xav tau los xyuas kom meej cov khoom siv ua haujlwm ib txwm muaj thiab txuas ntxiv nws lub neej kev pab cuam.
