Kev ua cov txheej txheem ntawm lub teeb yuag thermal rwb thaiv tsev refractory bricks feem ntau suav nrog cov hauv qab no:
① Txiav lub ntuj ntxeem tau lub teeb pob zeb kom tau cib:
②Siv tej yam ntuj tso lub teeb porous cov ntaub ntawv raws li raw cov ntaub ntawv los ua bricks;
③ Ntxiv cov hluav taws kub hnyiab tau yooj yim los tsim cov qauv ntxeem tau, xws li ntxiv cov nplej husk, sawdust, thiab lwm yam.; los yog ntxiv cov khoom uas yooj yim rau sublime, xws li hlawv naphthalene thiab volatilizing kom tau ib tug ntxeem tau qauv;
④ Ntxiv cov foaming tus neeg sawv cev los tsim cov qauv ntxeem tau, xws li ntxiv rosin xab npum thiab tua kom tau txais cov qauv ntxeem tau;
⑤ Los ntawm kev ua ntawm inorganic foaming tus neeg saib xyuas, cov pa tawm los ntawm cov tshuaj tiv thaiv kom tau cov qauv ntxeem tau.
Feem ntau hais lus, ob txoj kev ua ③ thiab ④ feem ntau siv.
Tam sim no, ntau txoj kev npaj ntawm cov ntaub ntawv thermal rwb thaiv tsev yog raws li hauv qab no:
(1) Hollow sphere bonding molding txoj kev:
Cov txheej txheem tsuas yog siv cov ntaub ntawv sib txuas los ua ke ua ntej npaj cov ntxeem tau sib xyaw ua ke rau daim ntawv, thiab tom qab ntawd qhuav thiab sintered ntawm qhov tsim nyog kub kom tau txais cov khoom. Cov khoom tsim los ntawm txoj kev no muaj tus nqi qis thiab cov txheej txheem yooj yim, tab sis nws muaj feem cuam tshuam rau kev delamination thaum lub sij hawm molding txheej txheem, thiab nws yuav ua rau tawg los yog txawm tawg thaum rov ua kom txias thiab cua sov txheej txheem vim qhov sib txawv ntawm thermal expansion ntawm lub binder thiab aggregate. . .
(2) Txoj kev Burnout ntawm pre-faus filling:
Txoj kev no yog qhov yooj yim hauv cov txheej txheem thiab tus nqi qis, thiab yog txoj kev tsim khoom loj. Feem ntau siv combustible additives yog sawdust, cork hmoov, charcoal, anthracite tshauv, coke hmoov, mov husk, polystyrene hais, naphthalene hais, thiab lwm yam.
(3) Tshuaj tiv thaiv foaming txoj kev:
Txoj kev no siv cov tshuaj tiv thaiv ntawm cov pore-forming tus neeg sawv cev hmoov sib tov nyob rau hauv slurry thiab cov kua theem Cheebtsam kom tso pa roj, kom lub slurry ua ib tug ntxeem tau ntws slurry, uas yog cam khwb cia, molded thiab qhuav kom tau ib tug ntxeem tau lub cev. Kub kub calcination yog ua tiav. Txoj kev no tsim nyog rau kev tsim cov khoom siv hluav taws xob ntshiab oxide-insulating refractory, thiab nws cov porosity tuaj yeem ncav cuag 55 feem pua rau 75 feem pua. Los ntawm cov ntaub ntawv (1), feem ntau siv tshuaj tiv thaiv yog sodium carbonate thiab acid los tsim CO2, caustic soda thiab txhuas los yog acid thiab txhuas los tsim hydrogen. Cov tshuaj tiv thaiv tus nqi ntawm cov tshuaj tiv thaiv no qeeb ntawm qhov kub thiab txias, thiab lub sijhawm foaming yog ntev. Nyob rau tib lub sijhawm, cov seem ntawm cov khoom ntxiv tom qab sintering yog loj thiab belongs rau cov khoom uas tsis muaj melting, yog li txo cov refractoriness ntawm cov khoom. Tsis tas li ntawd, vim yog tus nqi siab ntawm aluminium, nws kuj nce nqi ntawm cib ua.
(4) Pre-embedded volatile khoom tsav txoj kev:
Txoj kev no yog sib tov cov tshuaj volatile rau hauv slurry thiab tom qab ntawd sublime cov tshuaj volatile tsim pores nyob rau hauv tej yam kev mob.
(5) Ua npuas ncauj premixed casting txoj kev:
Txoj kev no yog ntxiv ua npuas ncauj (tau los ntawm lub cev foaming agents xws li cov protein, rosin xab npum, saponin rog, thiab lwm yam) rau hauv slurry thiab sib tov kom tau ib tug npaus slurry, uas yog ces cam khwb cia thiab molded, qhuav thiab raug rho tawm haujlwm kom tau porous lightweight. cov ntaub ntawv. Thermal rwb thaiv tsev refractory. Kev ua tau zoo ntawm cov khoom siv hluav taws xob kub-insulating refractory tsim los ntawm txoj kev no feem ntau cuam tshuam nrog kev ua haujlwm ntawm tus neeg sawv cev foaming. Tam sim no, lub ntsiab hom ntawm foaming agents yog rosin foaming tus neeg saib xyuas, pov tseg tsiaj plaub hau foaming tus neeg saib xyuas, resin xab npum foaming tus neeg saib xyuas, hydrolyzed ntshav kua nplaum foaming tus neeg saib xyuas, aluminium petroleum sulfonate foaming tus neeg saib xyuas, lignosulfonate, protein hydrolysis Txoj kev no muaj qhov zoo ntawm cov txheej txheem yooj yim, yooj yim rau tus tswv, tsis tshua muaj nqi khoom, muaj zog adaptability, thiab dav qhov chaw ntawm raw cov ntaub ntawv, thiab yog tshwj xeeb tshaj yog haum rau kev npaj ntawm siab porosity, tsawg ntom, hnav thermal rwb thaiv tsev cov ntaub ntawv refractory. Yog li ntawd, ntau thiab ntau xim yog them rau kev lag luam ntawm cov khoom siv hluav taws xob thermal rwb thaiv tsev.
Tam sim no, feem ntau siv txoj hauv kev hauv kev tsim khoom tiag tiag yog cov txheej txheem embedded filler burnout thiab ua npuas ncauj premixed casting txoj kev. Lub zog thiab thermal conductivity ntawm lub teeb yuag insulating cov ntaub ntawv tsim los ntawm ntau ntau txoj kev sib txawv. Thaum siv cov txheej txheem combustible los tsim cov ntaub ntawv thermal rwb thaiv tsev, thaum cov hluav taws kub hnyiab tau raug rho tawm haujlwm, huab cua diffuses mus rau hauv lub cib los ntawm cov pore raws los muab cov pa oxygen thiab cov khoom siv hluav taws xob tau tawm mus rau sab hauv raws cov pore channel, yog li tsim cov pores tas li hauv cov khoom siv. . Cov qauv tseem ceeb yog cov qauv qhib nrog cov theem roj txuas ntxiv thiab cov khoom tsis tu ncua, tab sis nws cov microstructure yog xoob thiab nws lub zog tsawg dua li ntawm cov ntaub ntawv foamed.
