Cov ntaub ntawv tsis zoo li refractory uas tuaj yeem txau rau lub ntsej muag ua haujlwm los ntawm cov cua kub ceev thiab adsorbed ntawm lub ntsej muag ua haujlwm hu ua refractory txhaj tshuaj. Nyob rau hauv txoj cai, txhua yam castable los yog txhua yam ntawm nws tus kheej-ntws cov ntaub ntawv thiab cov khoom siv yuav siv tau raws li qhuav txau cov ntaub ntawv los yog cov ntaub ntub dej txau, tsuas yog yuav tsum tau kho nws cov particle loj muaj pes tsawg leeg thiab hom thiab tus nqi ntawm additives. Cov khoom siv refractory blasting yog ib yam khoom tsis zoo li cov khoom siv refractory, uas yog ib yam tshiab ntawm cov khoom siv refractory nrog zoo fluidity tom qab ntxiv dej thiab nplawm yam tsis muaj firing thiab siab tsim. Nws cov qauv masonry muaj ob peb pob qij txha, muaj zog ncaj ncees, zoo airtightness, thiab tuaj yeem zam cov hmoov infiltration. Nyob rau tib lub sijhawm, piv nrog cov khoom siv refractory, cov khoom siv dav hlau refractory muaj cov yam ntxwv hauv qab no:
(1) Nws yog ib qho yooj yim rau thauj tog rau nkoj thiab tuaj yeem tiv thaiv phab ntsa kom tsis txhob tawm.
(2) Kev tsim kho tau yooj yim, kev siv zog tsawg, kev ua haujlwm ntawm masonry yog siab, thiab lub tshuab hluav taws xob hauv tsev tuaj yeem ua tiav.
(3) Lub sijhawm xa khoom luv luv, thiab cov khoom muag thiab cov nqi tuaj yeem raug txo raws li.
Cov ntaub ntawv refractory blasting yog dav siv, uas yooj yim rau kev siv cov peev txheej. Feem ntau, cov khoom siv granular uas tsim cov khoom siv no yog hu ua refractory aggregate, thiab cov khoom siv hmoov hu ua admixture (refractory hmoov los yog hmoov zoo), nrog rau cov binders thiab additives.
1. Kev tsim kho cov txheej txheem ntawm cov khoom siv tshuaj tsuag refractory
Raws li lub xeev ntawm cov khoom txau rau hauv lub cev hauv ob sab phlu (ua haujlwm lub ntsej muag), nws tuaj yeem muab faib ua ob pawg: cov khoom siv txias txias thiab molten lossis semi-molten khoom txhaj tshuaj. Cov tom kawg suav nrog cov hauv qab no.
Nplaim tshuaj tsuag txoj kev: Cov khoom yog txau mus rau hauv cov ntaub ntawv ua hauj lwm nrog ib tug propane roj nplaim taws. Thaum lub sij hawm txau cov txheej txheem, nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias, cov khoom yog nyob rau hauv ib tug molten los yog semi-molten lub xeev, ncaj qha sprayed mus rau lub high-temperature hauv ob sab phlu, thiab adsorbed rau ntawm lub hauv ob sab phlu. Yav dhau los, nws tau siv los kho cov kab hauv qhov cub, tab sis nws tsis yog siv ntxiv lawm.
Plasma spray method: Cov khoom yog txau rau hauv lub xeev ionic, uas tsis tshua muaj siv hauv cov ntaub ntawv refractory.
Slag splashing method: xws li slag splashing ntawm lub converter los tiv thaiv lub cub tawg, qhov sib xyaw ntawm cov khoom siv refractory thiab slag yog tshuab thiab splashed rau saum npoo ntawm lub converter los ntawm kev siv lub siab oxygen lance. Nws yog cov cuab yeej tseem ceeb los txhim kho lub neej ntawm converter hauv ob sab phlu.
Tus qub yog txoj kev siv tshuaj tsuag ntau tshaj plaws, uas suav nrog txoj kev siv tshuaj tsuag qhuav thiab cov txheej txheem ntub dej.
Dry jetting method: Ib qho kev khiav hauj lwm ntawm lub tshuab ziab khaub ncaws qhuav. Cov khoom qhuav nkag mus rau hauv cov ntaub qhwv lub nruas los ntawm lub silo. Cov ntaub ntaub nruas rotates ntawm ib lub kaum ntse ntse. Qhov chaw nres nkoj sab saud thiab cov huab cua channel ntawm lub compressor yog thauj mus rau thaj tsam ntawm lub nozzle kom tau raws li cov dej. Tom qab cov khoom sib xyaw nrog dej hauv lub nozzle, nws yog txau rau hauv ob sab phlu ua haujlwm. superior. Feem ntau ntawm cov khoom ejected yog adsorbed nyob rau hauv ua hauj lwm hauv ob sab phlu, thiab ib feem ntawm nws rebounds thiab ntog mus rau hauv av. Tus nqi ntawm cov khoom poob los ntawm qhov rov qab yog qhov tseem ceeb heev rau kev tsim kho ntawm ejected refractory. Feem ntau, tus nqi rov qab yog siv los qhia txog qhov ua tau zoo ntawm cov khoom ejected. Qhov qis dua tus nqi rov qab, qhov zoo dua. Muaj ntau yam cuam tshuam rau tus nqi rov qab: feem ntau suav nrog cov dej, cua siab thiab huab cua ntim.
Txoj kev ntub dej ntub dej yog ib txoj hauv kev uas cov castable nrog zoo fluidity yog pumped mus rau lub nozzle los ntawm cov kav dej, thiab yog sprayed mus rau hauv ob sab phlu ua hauj lwm los ntawm high-pressure cua ntws nyob rau hauv lub nozzle. Cov txheej txheem muaj plaub theem tseem ceeb: sib tov, siv, txau thiab solidification. Cov txheej txheem sib xyaw thiab cov twj tso kua mis tsis sib txawv ntawm cov khoom siv castables thiab cov khoom siv twj, yuav tsum tau sib xyaw ua ke thiab kev ua haujlwm zoo.
Yav dhau los, kev siv tshuaj tsuag feem ntau yog siv los kho cov kab hluav taws xob hauv tsev, thaum cov tshuaj ntub dej tuaj yeem siv ncaj qha rau hauv ob sab phlu. Nws tuaj yeem siv ncaj qha los tsim cov ladle thiab rauv hauv ob sab phlu ntawm ntau lub rauv. Nws qhov zoo yog cov txheej txheem yooj yim, tsis muaj qauv, tus nqi qis thiab kev kub ceev.
2. Cov teeb meem xav tau kev saib xyuas hauv txoj kev tshuaj tsuag
(1) Cov teeb meem hauv qab no yuav tsum tau them sai sai rau thaum siv cov tshuaj tsuag qhuav:
Tus nqi ntawm cov dej ntxiv yuav tsum tsim nyog: yog tias cov dej ntxiv me me, cov khoom siv yuav tsis zoo wetted, thiab cov khoom qhuav yuav yooj yim rebounded; Yog tias cov dej ntxiv ntau dhau lawm, cov txheej txheej tsim los ntawm kev txau yog nquag ntws, uas kuj txo cov peev txheej adsorption.
Cov huab cua siab thiab huab cua ntim ntawm cov tshuaj tsuag yuav tsum tsim nyog: thaum cov khoom loj heev, qhov cuam tshuam ntawm cov khoom ntawm cov tshuaj tsuag yog loj heev, thiab nws yooj yim rau rebound; yog tias nws me dhau lawm, cov khoom siv tsis txaus adhesion rau cov khoom thiab yooj yim rau poob.
Qhov kev ncua deb thiab lub kaum sab xis ntawm lub nozzle ntawm rab phom thiab cov tshuaj txau yuav tsum tsim nyog: tsis txhob siv lub zog ntawm cov khoom txau rau ntawm qhov chaw txau yog qhov loj lossis me dhau. Cov phom txau yuav tsum tau txav mus los thiab nqis, sab laug thiab sab xis kom ntseeg tau tias cov tuab tuab ntawm cov txheej txheej txau.
Lub thickness ntawm txhua cov tshuaj tsuag yuav tsum tsis txhob tuab heev: tuab heev yog yooj yim tev tawm, feem ntau tsis ntau tshaj 50 hli.
Tswj cov yas thiab coagulation ntawm cov khoom: cov khoom siv tau zoo adsorbed ntawm cov tshuaj tsuag txheej, thiab tuaj yeem ua kom ruaj khov sai kom tau txais qee lub zog.
(2) Muaj ntau yam uas cuam tshuam rau txoj kev siv dav hlau ntub dej. Cov tseem ceeb yog raws li nram no:
Kev sib xyaw ntawm cov khoom siv tshuaj tsuag Ua ntej, nws yuav tsum muaj qhov tsim nyog particle loj muaj pes tsawg leeg, piv ntawm aggregate rau matrix thiab noo noo cov ntsiab lus. Nrog rau kev sib koom tes kom zoo, qhov matrix tuaj yeem ua tau zoo dua rau ntawm qhov chaw ntawm cov khoom. Lub adhesion txheej yuav tsum tsis txhob tuab dhau los yog nyias, yog li txhawm rau kom ntseeg tau tias cov khoom tuaj yeem muaj cov yas zoo thiab ua raws li cov khoom txheej thaum lawv txau rau hauv cov khoom txheej. Feem ntau siv flocculants yog sodium aluminate, sodium silicate, polysodium chloride, calcium chloride, aluminium sulfate, potassium calcium sulfate, thiab lwm yam.
Yog tias lub dav hlau siab thiab dav dav dav dav dav dav me me dhau, cov khoom yuav tsis ua raws li cov khoom siv, thiab yog tias lawv loj dhau, lawv yuav yooj yim rov qab.
Qhov kev ncua deb thiab lub kaum sab xis ntawm rab phom txau thiab lub cev txau muaj qee yam cuam tshuam rau adhesion tus nqi ntawm cov khoom txheej.
Post lub sij hawm: Lub Xya hli ntuj-15-2022