Cov teebmeem ntawm alumina hmoov sib txawv cov ntsiab lus thiab admixture hom raurefractory castablekev ua tau zoo yog qhov tseem ceeb. Cov hauv qab no yog ib qho kev soj ntsuam ntxaws ntawm cov nyhuv no:
1. Cov nyhuv ntawm alumina hmoov cov ntsiab lus
Raws li cov ntsiab lus ntawm alumina hmoov nce, kev ua tau zoo ntawm cov castable yuav raug hloov pauv ntau. Tshwj xeeb:
Slurry viscosity: Raws li cov ntsiab lus khoom nce, tus nqi viscosity ntawm slurry maj mam nce. Thaum cov ntsiab lus khoom nce mus rau qee qhov (xws li kwv yees li 80%), viscosity yuav nce sai. Qhov no yog vim hais tias qhov nce hauv cov ntsiab lus ntawm cov khoom ua rau nce cov khoom hauv cov slurry thiab txhim kho kev sib cuam tshuam ntawm cov khoom, ua rau muaj viscosity.
Kev tsim kho kev ua haujlwm: Kev nce hauv cov ntsiab lus tseem ceeb yuav cuam tshuam rau kev tsim kho ntawm cov castable. Cov ntsiab lus siab dhau lawm yuav ua rau cov slurry ua kom khov thiab nyuaj rau tsim. Yog li ntawd, thaum xaiv cov ntsiab lus ntawm alumina hmoov, nws yog ib qho tsim nyog yuav tau xav txog qhov viscosity thiab kev tsim kho ntawm cov slurry.
2. Cov nyhuv ntawm admixture hom
Hom admixture kuj tseem muaj feem cuam tshuam rau kev ua haujlwm ntawm refractory castable. Hauv qab no yog ib qho kev ntsuam xyuas ntawm ntau hom admixtures:
Polycarboxylate dej reducer: Polycarboxylate dej reducer yog cov khoom siv feem ntau uas tuaj yeem txo cov viscosity ntawm slurry thiab txhim kho kev tsim kho. Nyob rau tib lub sijhawm, nws tuaj yeem txhim kho qhov fluidity thiab impermeability ntawm castable.
Sodium polyacrylate: Sodium polyacrylate kuj yog ib qho khoom siv feem ntau uas tseem muaj cov txiaj ntsig ntawm kev txo cov viscosity ntawm slurry. Txawm li cas los xij, piv nrog polycarboxylate dej reducer, nws cov viscosity txo cov nyhuv yuav qis me ntsis.
Dispersible alumina micropowder: Thaum dispersed alumina micropowder yog siv los ua ib qho kev sib xyaw, nws tuaj yeem txhim kho cov dispersibility ntawm slurry thiab txo cov viscosity. Qhov no yog vim hais tias dispersed alumina micropowder muaj ib tug me me particle loj tis thiab ib tug ntau dua qhov chaw saum npoo, uas yuav ua tau zoo dua sau lub pores nyob rau hauv slurry thiab txo cov kev sib cuam tshuam ntawm hais.
Hauv kev siv tswv yim, kev xaiv ntawm cov khoom sib xyaw yuav tsum tau txiav txim siab raws li qhov xwm txheej tshwj xeeb. Cov khoom sib txawv muaj qhov sib txawv ntawm qhov kev ua tau zoo ntawm castables, yog li nws yuav tsum tau ua tib zoo xav txog lub hom phiaj ntawm castable, kev tsim kho, tus nqi thiab lwm yam los xaiv.
3. Kev txheeb xyuas qhov cuam tshuam
Flowability: Nyob rau hauv cement-bonded corundum refractory castables, bimodal thiab multimodal alumina hmoov muaj slurry tawm ceev ceev thiab zoo flowability tshaj unimodal alumina hmoov. Qhov no feem ntau yog vim hais tias bimodal thiab multimodal alumina hmoov muaj qhov zoo dua particle loj faib thiab thaj chaw tshwj xeeb, uas tuaj yeem ua tau zoo dua cov pores hauv slurry, yog li txhim kho cov dej ntws ntawm slurry.
Lub cev muaj zog: Xaiv cov hmoov alumina uas tsim nyog thiab cov khoom sib xyaw tuaj yeem txhim kho lub cev zoo ntawm castables. Piv txwv li, thaum siv dispersible alumina hmoov raws li admixtures, viscosity ntawm slurry tuaj yeem txo qis thiab cov dispersibility tuaj yeem txhim kho, yog li tau txais qhov pom tseeb qis dua thiab siab dua lub cev xws li lub zog flexural thiab compressive zog.
Hauv cov ntsiab lus, sib txawv alumina hmoov cov ntsiab lus thiab cov khoom siv sib xyaw muaj qhov cuam tshuam loj rau kev ua haujlwm ntawm castables. Hauv kev siv cov tswv yim, nws yog ib qho tsim nyog los xaiv cov khoom tsim nyog alumina hmoov cov ntsiab lus thiab cov khoom sib xyaw ua ke raws li cov xwm txheej tshwj xeeb kom tau txais qhov zoo tshaj plaws castable kev ua tau zoo.
