Tsawg Cement Castable
Tsawg cement castables txhais yog cov castable refractory uas yog ua los ntawm ultrafine hmoov, aluminate cement thiab ib co admixtures. Tsis tas li ntawd, tus nqi ntawm cov khoom sib xyaw no tuaj yeem cuam tshuam nws qhov kev ua tau zoo. Raws li rau nws cov dej npaum li cas, muab qhov kev lees paub yooj yim ntawm cov khoom sib xyaw, ntxiv cov dej me me tuaj yeem txo qhov porosity thiab txhim kho lub zog. Tsawg Maas Refractory Castable muaj qhov zoo ntawm cov dej, siab dua, uas yog qhov ua kom dav hauv ntau lub tshav pob thiab ntau lub cub tawg thiab muaj ntau lub cub tawg thiab hauv cov hluav taws kub thiab cov nplaim hluav taws. Tshwj xeeb, nrog sib txawv aggregates, nws yog siv nyob rau hauv sib txawv kilns. Tsawg cement castable tuaj yeem siv rau hauv ob sab phlu ntawm kub kub kub thiab qhwv hauv ob sab phlu ntawm cov cua sov rauv dej txias tube, thiab corundum thiab chrome corundum tsawg cement castable tuaj yeem siv rau hauv ob sab phlu ntawm zaus induction rauv thiab kub qhov chaw ntawm petrochemical catalytic cracking reactor.
Qhov zoo ntawm Low Cement Castable
Cov ntsiab lus ntawm cov cement tsawg
Tsawg cement castables yog tias lawv muaj qis dua ntawm aluminium silicate cement (calcium aluminate cement, cac). Feem ntau, cov cement castables tsawg muaj cov ntsiab lus cement tsawg dua 8%, thaum cov tsoos castables yuav muaj 10-20% cement. Cov ntsiab lus qis cement txo qhov porosity tag nrho thiab permeability ntawm castable, txhim kho cov compactness thiab hluav taws kub tsis kam ntawm cov khoom.
Kev kub siab ua haujlwm
Tsawg cement castable muaj kev ua haujlwm kub zoo heev. Cov ntsiab lus ntawm cov cement qis txo cov khoom zoo li tawg thiab muab kev tiv thaiv zoo dua rau thermal shock thiab spalling. Qhov no tso cai rau qis cement castables kom muaj kev ruaj ntseg zoo dua thiab ua haujlwm ntev hauv qhov kub thiab txias.
Lub zog thiab load-bearing muaj peev xwm
Tsawg-cement castables muaj lub zog siab thiab muaj peev xwm thauj khoom zoo. Piv nrog rau cov tsoos castables, nws cov ntsiab lus qis qis tuaj yeem txhawb kev tsim ntawm ntau theem mullite, uas txhim kho lub zog thermal thiab kev muaj peev xwm ntawm cov khoom. Qhov no ua rau qis-cement castables haum rau daim ntaub ntawv uas yuav tsum tau tiv taus hnyav loads los yog thermal cycling loads ntawm high kub.
Txo cov dej xav tau
Tsawg cement castables yuav tsum tau dej tsawg dua thaum tsim kho, uas yuav pab txhim kho cov khoom compactness thiab txo lub sij hawm kom qhuav. Qhov no txo qhov kev pheej hmoo ntawm kev tawg thaum ziab thiab txhim kho tag nrho cov khoom ntawm cov khoom.
Zoo tshuaj corrosion kuj
Tsawg cement castables feem ntau yog ntxiv nrog cov additives thiab binders los txhim kho lawv cov tshuaj tiv thaiv corrosion. Qhov no ua rau qis cement castables haum rau cov ntawv thov nrog alkali hlau nres, slag nres lossis tshuaj tiv thaiv corrosion.
Kev tsim kho yooj yim
Tsawg-cement castables muaj fluidity thiab operability, thiab yooj yim rau lis thiab nruab. Nws tuaj yeem siv los ntawm kev nchuav, txau lossis khawb, muab qhov yooj yim thiab tsim nyog rau cov ntawv thov uas tsim cov txheej txheem nyuaj.
Vim Li Cas Xaiv Peb
Peb lub Hoobkas
Hoobkas tsim nyob rau hauv 1984, International lag luam department tsim nyob rau hauv 2010, Hoobkas nrog 10000 m2 cheeb tsam.
Cov cuab yeej siv siab heev
Teeb ntawm 1000 tons cib tshuab, 10 teeb ntawm 630 tons cib tshuab, 2 teeb ntawm 180m siab kub qhov cub, ua tiav cov khoom siv ntsuas lub cev thiab tshuaj lom neeg.
Peb qhov kev pabcuam
Cov khoom lag luam pub dawb tsim, kev txhawb nqa thev naus laus zis pub dawb, kev taw qhia kev teeb tsa dawb, 18 lub hlis lav zoo.
Peb cov khoom
Ch refractories yog cov chaw tsim khoom ntawm hluav taws xob cib, mortar, Pre-casting, Pre shape, Rwb thaiv tsev khoom, Castable, Functional Products for Iron & Steel, Cement, Glass, Fais fab & Petrochemical Industries. Ntxiv mus, CH REFRACTORIES tseem raug tsim thiab xa tawm cov cement refractory A600 A700 A900 CA70, Bauxite thiab lwm yam refractories raw khoom rau tag nrho lub ntiaj teb no.
Qhov txawv ntawm Tsawg Cement Castable thiab Traditional Castable
Tsawg cement castable thiab tsoos castable yog sib txawv heev, feem ntau nyob rau hauv qhov sib txawv ntawm nruab nrab thiab zaum kawg lub zog, cov tsoos castable nyob rau hauv nruab nrab lub zog tsis zoo, tab sis tsawg cement castable yog deb zoo dua li cov tsoos refractory castable, tsis tsuas yog vim cov cement. cov ntsiab lus tsis tshua muaj, thiab muaj cov ntsiab lus calcium tsawg, tab sis kuj tseem siv cov tshuab ultrafine hmoov, kom cov castable nyob rau hauv qhov tsim nyog feem ntawm cov khoom faib. Ntxiv mus, qhov kawg lub zog thiab nruab nrab lub zog ntawm castable kuj tau txhim kho ntxiv.
Piv nrog rau cov tsoos refractory castable, cov cement castable tsawg dua muaj qhov ntom ntom dua, qis porosity thiab siab dua curing zog ntawm chav tsev kub. Nyob rau tib lub sijhawm, nws muaj qhov zoo ntim ruaj khov, lub ntim qis tom qab ziab thiab calcination. Lub zog siab thiab cov khoom siv cement tsawg hauv cov cement castable uas tsis tshua muaj yog npaj los ntawm kev siv cov calcium aluminate cov cement ua cov ntawv khi. Qhov siab tshaj plaws siv kub ntawm lub zog siab castable ncav cuag 1600 degree, thiab nws muaj kev hnav zoo thaum kub kub. Lub zog siab thiab qis cement castables yog tsim rau siv nyob rau hauv txhua yam ntawm kiln linings nrog kub thiab muaj zog yaig.
Cov khoom siv cement tsawg nrog fused dawb corundum li aggregate yog hu ua low cement corundum castable, corundum low cement khoom muaj lub zog txhua yam, erosion resistance thiab abrasion resistance, qhov siab tshaj plaws siv kub txog 1700 degree, qis cement corundum castable yog tsim rau ntau tshaj 1400. degree, cuam tshuam kev puas tsuaj loj loj cement kiln qhov ncauj, ntau lub thoob txias tshuab lub luj tshib thiab lwm yam hauv ob sab phlu siv. Nws kuj tseem tsim nyog siv nrog txhua qhov chaw ntawm lub qhov cub hauv ob sab phlu saum 1400 degree.
Cov tsoos refractory castables yog ua los ntawm refractory hais thiab hmoov, nrog rau siab aluminium cement. Cov particle gradation ntawm qhov sib sau ua ke tsis zoo li cov khoom siv cement tsawg. Cement particles kuj yog ntxhib, thiab feem ntau ntawm cov cement ntxiv yog loj, cov dej ntxiv thaum siv kuj tseem loj. Tsis tas li ntawd, tus nqi ntawm cov cement yog loj thiab cov khoom tsis raug muab qhab nia, yog li cov khoom siv cement tsis tuaj yeem hydrated kiag li, tshwj xeeb tshaj yog nyob rau ntawm 800 degree, tsis muaj zog, yog li kev ua tau zoo ntawm cov tsoos castable tsis zoo li tsawg. cement castable.
Lub luag haujlwm ntawm Silica Fume hauv Tsawg Cement Castable
Pore tus nqi thiab pore qauv
Qhov pom meej porosity ntawm qis cement castables piv nrog cov castables zoo tib yam tom qab cua sov ntawm 1400 degree yog 20.4% rau yav dhau los thiab 26.4% rau tom kawg, nce ze li 30%. Tag nrho cov porosity nyob rau hauv qis cement castables yog qis dua li ntawm cov castables zoo tib yam raws li ntsuas los ntawm txoj kev twj tso kua mis siab. Cov castables zoo tib yam tom qab cua sov ntawm 800 degree nce ze li ntawm 40% piv rau 110 degree ziab. Hais txog qhov pore loj faib, qhov pore loj ntawm cov castables loj dua 100A yog 2-3 npaug ntawm cov cement castables tsawg, thiab qhov pore loj ntawm tsawg dua 1000A tsuas yog 30-50% ntawm qhov tsawg. cement castables.
Lub zog hloov yam ntxwv
Lub zog ntawm qis cement castables tuaj yeem loj hlob tsis tu ncua nyob rau hauv qhov kub thiab txias, nruab nrab kub thiab siab kub theem, thaum lub zog nruab nrab kub ntawm cov castables feem ntau pom tseeb txo.
Thermal xeev flexural zog
Thaum cov kab hloov pauv hauv cov cua sov, qhov shrinkage tus nqi ntawm cov cement castables qis qis dua li cov castables zoo tib yam. Thaum nws nce mus txog 1500 degree, qis cement castables qhia ib qho kev nthuav dav ntawm 0.1-0.8%, yog li cov khoom tsis pom cov kab nrib pleb. Lub refractoriness ntawm qis cement castables tau ntsuas los ntawm 1790-1830 degree , uas yog siab dua li cov castables zoo tib yam (1690-1710 degree ).
Load softening point test
Lub thermal expansion yog qhov zoo ib yam ntawm ob hom castables ua ntej 1400 degree, tom qab 1400 degree qhov qis cement castable shrinks me ntsis thiab tom qab ntawd pib nthuav dua, qhov nthuav dav yog 0.5% ntawm 1500 degree, thaum Qhov zoo tib yam castable shrinks sharply tom qab 1400 degree, qhov expansion tus nqi twb tsis zoo ntawm 1500 degree (-1.8%).
Erosion kuj
Qhov kev sim nrog converter slag rhuab mus rau 1450 degree thiab qhov kub thiab txias rau 3 teev, qhov kev yaig ntawm cov cement castable tsawg yog li 4CM2, uas zoo dua li 7CM2 ntawm cov castable. Txog tam sim no, General Institute of Metallurgy thiab Kev Tsim Kho tau tsim DJ series ntawm ntau qib ntawm cov cement castable thiab siv lawv hauv ntau qhov haujlwm.
Thermal conductivity ntawm Low Cement Castables
Cov ntsiab lus cement
Piv nrog rau cov tsoos castables, qis cement castables muaj cov ntsiab lus ntawm cov cement. Feem ntau, cov cement muaj cov thermal conductivity ntau dua li lwm cov khoom siv refractory, yog li cov cement castables tsawg pab txo cov thermal conductivity tag nrho thaum txo cov ntsiab lus cement.
Refractory hais
Cov khoom tseem ceeb ntawm cov cement castables yog cov khoom siv refractory, xws li alumina, mullite, silicate, thiab lwm yam. Cov khoom siv refractory feem ntau muaj cov thermal conductivity tsawg thiab ua lub luag haujlwm tseem ceeb hauv kev txo cov thermal conductivity tag nrho.
Binders thiab fillers
Ib qho kev faib ua feem ntawm cov binders thiab fillers yuav muab ntxiv rau cov cement castables tsawg, xws li Portland cement, silicate microspheres, thiab lwm yam. Cov ntaub ntawv no feem ntau muaj cov thermal conductivity tsawg, uas tuaj yeem txo cov thermal conductivity ntawm castable.
Particle gradation thiab pore qauv
Cov particle gradation thiab pore qauv ntawm low-cement castables kuj yuav cuam tshuam nws thermal conductivity. Tsim nyog particle gradation tuaj yeem txo qhov kev sib txuas ntawm qhov hws, yog li txo cov cua sov txoj kev; Nyob rau tib lub sijhawm, tswj cov qauv pore, xws li nce qhov pore kaw los yog siv cov qauv zoo pore, kuj yuav pab txo cov thermal conductivity.
Dab tsi yog Refractoriness ntawm Low Cement Castables?
Tsawg cement castables nthuav tawm qhov nruab nrab refractoriness. Hmoov tsis zoo refractoriness yog ib qho kev faib ua haujlwm nyuaj heev los siv thaum txheeb xyuas cov khoom los nrhiav seb qhov twg yuav zoo tshaj rau koj daim ntawv thov. Tsis muaj kev ntsuas los yog ntsuas ntawm refractoriness uas yuav los sib piv ntau yam ntaub ntawv vim hais tias lub npe / kev faib cov khoom raws li 'refractory' ties nyob rau hauv ntau yam, ntau yam uas yog siv rau cov ntaub ntawv muaj peev xwm los tiv thaiv deformation thiab tswj cov qauv kev ncaj ncees los yog load. bearing peev xwm nyob rau hauv sever thermally chaotic ib puag ncig los yog thaum raug kub heev kub rau ncua sij hawm ntawm lub sij hawm.
Txhua yam khoom uas txhais tau tias yog refractory yuav tsum tau ntau dua los yog tsawg dua kev coj cwj pwm ntawm ib qho 'ideological' refractory, uas tsawg kawg yuav tsum tiv taus deformation thaum raug huab cua kub ib puag ncig. Txawm li cas los xij, cov tshuaj refractoriness tsis yog txiav txim siab los ntawm qhov kub siab tshaj plaws uas nws tuaj yeem raug nthuav tawm thaum txhawb nqa nws daim ntawv. Kev tuav cov txheej txheem kev ncaj ncees thaum raug hloov pauv sai ntawm qhov qis tshaj plaws (feem ntau yog qhov kub uas cov khoom yuav txias rau thiab so thaum lub cuab yeej lossis lub kaw lus nyob rau hauv uas nws tau teeb tsa tsis ua haujlwm) qhov kub siab tshaj plaws. Qhov kev hloov pauv sai dua cov khoom siv tuaj yeem tiv taus thaum tuav ib daim ntawv tsis hloov pauv, kev ua haujlwm ruaj khov, thiab lwm yam, qhov ntau refractory cov khoom yog. Qhov nrawm dua los ntawm qhov kub qis mus rau qhov kub siab, thiab tom qab ntawd rov qab los ntawm qhov kub ntawd mus rau qhov qis qis, nrog rau ntev npaum li cas nws tuaj yeem tuav ntawm qhov kub siab tshaj plaws, thiab tom qab ntawd poob ntawm qhov nrawm nrawm mus rau qhov qis tshaj. Thermal shock resistance yog qhov tsis tshua muaj txiaj ntsig zoo ntawm cov ntaub ntawv refractory tab sis ua raws li cov ntsiab lus ntawm cov khoom siv tswj nws daim ntawv thiab lub zog muaj zog nyob rau hauv ib puag ncig qhov xwm txheej phem tshaj plaws.
Thiab raws li thev naus laus zis hloov pauv cov ntaub ntawv sib piv refractoriness. Tab sis tom qab ntawd peb yuav tsum teb cov lus nug ntawm seb peb tab tom tham txog cov yam ntxwv ntawm cov khoom siv hluav taws xob thoob plaws hauv txhua daim ntawv thov kev lag luam lossis saib cov ntaub ntawv sib piv raws li ib qho tshwj xeeb kev lag luam thermal daim ntawv thov. Thaum cov ntaub ntawv refractory yuav tsum muaj peev xwm tiv taus qhov kub thiab txias ib puag ncig, nrog ntau dua refractoriness hais txog cov khoom muaj kev tiv thaiv ntau dua rau kev degradation nyob rau hauv cov xwm txheej zoo li no, qhov refractoriness ntawm cov khoom siv kuj tseem nyob ntawm nws lub peev xwm los ua rwb thaiv tsev. Qhov no yog ib qho tseem ceeb ntawm cov khoom siv raws li thermal tsis kam thiab ob qho tib si ua tus txiav txim siab ntawm cov ntaub ntawv txheeb ze refractoriness.
Cov ntaub ntawv muaj peev xwm insulate tuaj yeem pom los ntawm kev suav nws tus nqi K lossis R-tus nqi. K-tus nqi muab cov ntsiab lus rau qhov dav ntawm cov khoom siv yog qhov sib txawv ntawm cov khoom tuab. Cov ntaub ntawv R-tus nqi yog xam ntawm nws cov thermal kuj. Qhov no cuam tshuam ncaj qha rau cov khoom siv rwb thaiv tsev uas tau teev tseg hauv cov ntsiab lus yooj yim raws li kev tiv thaiv rau cov dej ntws ntawm cov cua sov uas cov khoom siv tshwj xeeb ntawm qhov tuab ntawm 1 meter. Qhov kev sib txawv no yog nyob ntawm cov ntaub ntawv insulating thickness thiab nws 's R-tus nqi nce nyob rau hauv ncaj qha piv rau ib qho kev nce nyob rau hauv thickness tshaj 1 meter.
Yuav Siv Li Cas Cement Castables Zoo?
Kev teeb tsa thiab txheej txheem hardening ntawm cov cement castables qis yog tshwm sim los ntawm kev sib txuas ntawm cov dej thiab cov cohesion bonding, los yog cohesion bonding ib leeg. Tom qab cov dej-txo tus neeg sawv cev nyob rau hauv lub castable yog txiav txim siab, lub fluidity ntawm lub castable kuj yuav txawv heev nyob ntawm seb tus nqi ntawm cov ntshiab calcium aluminate cement ntxiv. Thaum cov nyiaj ntxiv ntau dua 9%, tus nqi ntws ntawm cov castable yog qis dua 110mm, thiab qhov kev tsim kho ib txwm muaj ntawm cov castable tsis tuaj yeem lav. Qhov no tej zaum yuav yog vim muaj ntau ntau ntawm cov ntshiab calcium aluminate cement uas ua rau kom qhov chaw thiab cov txheej txheem hardening ntawm castable.
Cov kev ntsuas hauv qab no tuaj yeem siv los daws cov kev hloov pauv ntawm cov cement castables qis. Muab ob npaug rau ntim ntim, tshwj xeeb tshaj yog nyob rau lub caij ntuj nag lossis thaum lub sijhawm cia ntev. Xaiv ib tug dispersant nrog ib tug muaj zog dispersing muaj peev xwm. Xav txog kev ntxiv qee cov pob tshiab uas tau qhib ntawm cov cement thaum siv thiab sib tov. Siv lub tshuab ua kom muaj zog sib tov thiab tswj lub sijhawm sib tov. Ntxiv ib qho accelerator los yog retarder los kho lub hardening ceev ntawm lub castable. Nyob rau hauv cov nqe lus ntawm kev tswj ntawm qhov chaw, tiv thaiv kom txhob ya raws thaum lub sij hawm cia. Tam sim no, txoj hauv kev zoo tshaj plaws los daws qhov kev hloov pauv ntawm cov cement castables tsawg ntawm qhov chaw yog ntxiv qhov chaw accelerator lossis retarder rau cov castables. Cov accelerators thiab retarder siv, tshwj xeeb tshaj yog cov carbonate accelerator thiab citric acid retarder, yog siv nyob rau hauv me me muaj peev xwm, thiab tsis muaj kev phiv los ntawm lub zog ntawm castable nyob rau hauv tag nrho cov kub.
Instantaneous poob ntawm fluidity tej zaum tshwm sim thaum lub sij hawm castable tsim. Lub laj thawj txheeb xyuas yuav tsum yog vim qhov tsis ua haujlwm ntawm tus neeg saib xyuas dej hauv cov khoom siv castable lossis kev ua haujlwm tsis raug thaum tsim kho. Cov dej txo tus neeg sawv cev yog cov khoom siv saum npoo av. Kev ua haujlwm saum npoo ntawm cov dej tsis muaj dej-txo cov neeg ua haujlwm tsis tseem ceeb. Nws tsuas yog ua kom cov zeta muaj peev xwm los ntawm cov tshuaj adsorption, ua kom cov qauv flocculation ntawm cov khoom puas. Muab kev ua si tag nrho rau cov nyhuv ntawm cov hmoov micro thiab cov nyhuv lubrication ntawm cov dej dawb kom muaj dej ntau ntxiv. Cov anionic pawg N ionized los ntawm cov organic dej-txo tus neeg sawv cev hauv dej muaj cov dej num muaj zog. Nws qhov kawg lipophilic yog adsorbed rau ntawm qhov chaw ntawm colloidal hais los ntawm lub cev adsorption thiab nkag mus rau hauv cov txheej txheem ruaj khov adsorption. Lub peev xwm nce nyob rau hauv kev coj tsis zoo, thiab cov roj-repellent xaus rau ib leeg kom ua tiav lub hom phiaj ntawm dispersion. Txawm li cas los xij, tus neeg saib xyuas dej txo tau yooj yim nqus cov dej noo hauv cov khoom xyaw castable thaum lub sij hawm khaws cia thiab ua rau deliquescence thiab hydrolysis, uas ua rau cov acidity ntawm cov khoom xyaw castable. Qhov no ua rau poob dej-txo cov nyhuv thiab instantaneous fluidity poob. Yog li ntawd, kev ntsuas yuav tsum tau ua thaum tsim khoom thiab khaws cia cov castables. Piv txwv li, siv cov dej-txo tus neeg sawv cev uas tsis zoo hygroscopicity, cais cov dej-txo tus neeg sawv cev los ntawm cov castable, thiab lwm yam.
Peb lub Hoobkas
Hoobkas tsim nyob rau hauv 1984, International lag luam department tsim nyob rau hauv 2010. Hoobkas nrog 10000 m2 cheeb tsam, 120 neeg ua hauj lwm nrog rau 20 kws engineers. CH REFRACTORIES yog cov chaw tsim khoom ntawm hluav taws kub, mortar, Pre-cam khwb cia, Preform, Rwb thaiv tsev cov khoom, Castable, Functional Products for Iron & Steel, Cement, Glass, Power & Petrochemical Industries. Ntxiv mus, CH REFRACTORIES tseem raug tsim thiab xa tawm cov cement refractory A600 A700 A900 CA70, Bauxite thiab lwm yam refractories raw khoom rau tag nrho lub ntiaj teb no.
Daim ntawv pov thawj
FAQ:
Q: Dab tsi yog qhov qis cement castable?
Q: Dab tsi yog cov ntawv thov tseem ceeb ntawm cov cement castables tsawg?
Q: Cov cement castables puas tuaj yeem siv rau hauv cov ntawv thov kub?
Q: Puas muaj kev tiv thaiv kev nyab xeeb los xav txog thaum ua haujlwm nrog cov cement castables qis?
Q: Yuav ua li cas koj kho puas tsawg cement castable linings?
Q: Dab tsi yog qhov tseem ceeb rau kev txiav txim siab thaum xaiv cov cement castables qis rau ib daim ntawv thov tshwj xeeb?
Q: Koj yuav ua li cas kom ntev lub neej ntawm cov cement castable linings?
Q: Cov cement castables puas tuaj yeem siv rau hauv kev siv hlau tsis muaj hlau?
Q: Yuav ua li cas qis cement castables khaws cia?
Q: Yuav ua li cas koj txiav txim siab qhov tsim nyog thickness ntawm tsawg cement castables rau lub cub tawg hauv ob sab phlu?
Q: Yuav ua li cas qis cement castables txawv ntawm cov pa castables?
Q: Dab tsi yog qhov muaj pes tsawg leeg ntawm cov cement castables tsawg?
Q: Yuav ua li cas thiaj li qis cement castables tsim?
Q: Dab tsi yog qhov zoo ntawm kev siv cov cement castables tsawg?
Q: Dab tsi yog qhov txwv ntawm cov cement castables tsawg?
Q: Yuav ua li cas qis cement castables piv rau cov tsoos refractory cib?
Q: Cov cement castables puas tuaj yeem siv rau kev sib cuag nrog cov hlau molten?
Q: Yuav ua li cas koj txiav txim siab cov dej tsim nyog rau kev sib xyaw cov cement castables tsawg?
Q: Dab tsi yog cov txheej txheem kho rau cov cement castable tsawg?
Q: Koj yuav ntsuas qhov zoo ntawm cov cement castables li cas?
Peb paub zoo tias yog ib qho ntawm cov ua lag luam qis cement castable hauv Suav teb. Thov so assured mus yuav customized low cement castable ntawm tus nqi sib tw los ntawm peb lub hoobkas. Tiv tauj peb rau cov khoom pheej yig dua.