Lub zogHigh Alumina refractory cibKev muag khoom, Cov neeg siv khoom hauv Iran xaj 22 Tuj
High quality refractory alumina cib, alumina slica siab aluminium cib dav siv rau kev lag luam rauv
Mineral muaj pes tsawg leeg thiab cracking teeb meem ntawm siab alumina refractory cib
Cov ntxhia muaj pes tsawg leeg ntawm high-alumina cib yog txiav txim siab los ntawm bauxite siv. Cov ntxhia muaj pes tsawg leeg ntawm clinker feem ntau yog mullite, corundum thiab iav theem. Lub theoretical muaj pes tsawg leeg ntawm mullite yog Al2O3 71.8%, SiO2 28.2%, thiab nws melting decomposition kub yog 1840 degree . Nws muaj koob-zoo li tus siv lead ua, lub network cross qauv, thiab muaj zog zoo ntawm qhov kub thiab txias. Corundum muaj nyob rau hauv daim ntawv ntawm -Al2O3, nrog ib tug melting point ntawm 2050 degree, ib tug hardness ntawm Mohs 9, thiab yog nyob rau hauv daim ntawv ntawm granular thiab columnar crystals. Nws muaj cov tshuaj lom neeg ruaj khov zoo thiab muaj qee yam ua rau cov kua qaub thiab alkaline slag. Corundum muaj nyob rau hauv daim ntawv ntawm -Al2O3, nrog ib tug melting point ntawm 2050 degree, lub zog ntawm Mohs 9, thiab yog nyob rau hauv daim ntawv ntawm granular thiab columnar crystals. Nws muaj cov tshuaj lom neeg ruaj khov zoo heev thiab muaj qee yam ua rau cov kua qaub thiab alkaline ya tshauv.
Tsis hais txog ntawm cov ntaub ntawv raw, txawm tias nws yog high-alumina refractory cib, rwb thaiv tsev cib, av nplaum cib, thiab lwm yam nrog lub zog siab thiab cov txheeb ze ntom ntom. Txawm hais tias kev tsim khoom zoo tag nrho, yog tias nws tsis siv kom zoo thaum siv los yog siv, nws tseem yuav ua rau tawg. Hnub no kuv yuav qhia rau koj txog ob qho laj thawj rau kev tawg.
1: Qhov tam sim no tawg ntawm high-aluminium refractory cib, kev hais lus, yog hu ua thermal shock cracking. Tej yam zoo li no kuj tshwm sim hauv lub neej. Cov iav fwj nyob rau hauv lub tub yees yuav tawg nyob rau hauv ib qho instant thaum lawv dheev rhuab los ntawm hluav taws. Qhov ntxeev yog tib yam. Ib yam li ntawd, high-aluminium refractory bricks tseem yuav tawg nyob rau hauv ib qho instant thaum lawv dheev raug quab yuam los yog kub uas lawv tsis tuaj yeem tiv taus.
2: Kev tawg los ntawm qhov ntiav mus rau qhov tob. Cov txheej txheem no qeeb heev. Vim li cas feem ntau siv cov tshuab cua sov yuav tsum tau kuaj xyuas txhua xyoo? Vim tias high-aluminium refractory bricks yuav maj mam tsim cov kab nrib pleb tom qab ob peb ci, thiab tom qab ntawd poob tawm, tawg, thiab thaum kawg qhia poob. Qhov no yog vim hais tias lub tsev lag luam kiln tas li tso tawm shocks rau nws, uas yog inevitable nyob rau hauv cov txheej txheem ntawm daim ntawv thov khoom.
Lub cev kub ntawm lub cev tsis yog tag nrho nyob ntawm Al2O3 cov ntsiab lus nyob rau hauv siab alumina refractory cib, tab sis ntau dua ntawm cov duab siv lead ua thiab tus lej, muaj pes tsawg leeg thiab viscosity ntawm interlayer iav theem. Cov kev sim kev ntxhov siab los yog kev tshawb fawb txog kev nruj nruj ntawm tus nqi thiab kev puas tsuaj ntawm cov alumina cib siab qhia tau hais tias qhov kub ntawm lub cev ntawm zirconium corundum cib zoo dua li cov cib uas muaj Al2O3 cov ntsiab lus siab. Txawm hais tias LZ-75 hom high alumina firebricks tsim ib tug loj tus naj npawb ntawm high-refractory -corundum crystals nyob rau hauv granular thiab columnar duab, lub zog ntawm nws internal economic qauv yog tsis inferior rau cov zirconium corundum qauv, tab sis nyob rau hauv lub Cov nyhuv ntawm cov kev ntxhov siab hauv av, ib qho me me ntawm cov kua iav interlayer ntawm cov muaju ua rau cov khoom thauj, ua rau cov qauv deformation thiab txo qis compressive zog. Zirconia corundum cib, xws li LZ-65 thiab LZ-55, feem ntau yog ua los ntawm zirconium corundum crystals, uas yog fibrous thiab tsim ib tug ntoo khaub lig-network qauv. Thaum lub sij hawm interlayer iav theem filling, lawv muaj peev xwm dais kev nyuaj siab, tsis yooj yim rau deform, thiab muaj zoo kub compressive zog, tshwj xeeb tshaj yog cib ua los ntawm sillimanite cov ntaub ntawv. Cov khoom purity yog siab. Tom qab tua hluav taws, zirconium corundum thiab SiO2 hloov dua siab tshiab. Tsuas yog ib qho me me ntawm SiO2 thiab ib qho seem ntawm qhov seem los ua ib theem iav, qhov seem ntawm SiO2 tau hloov mus rau hauv calcite thiab ntim rau hauv zirconium corundum crystals, uas nthuav tawm tom qab txias. Lub cib no qhia tau hais tias muaj kev ntxhov siab zoo nyob rau hauv kev siv mus ntev. Txawm hais tias LZ-48 cib hloov mus rau hauv zirconium corundum crystals, nws yog engulfed los ntawm ib tug loj npaum li cas ntawm iav theem, yog li ntawd lub high-temperature feem toughness yog tsis muaj zog, tab sis lub compressive zog ntawm chav tsev kub yog zoo. Yog li ntawd, qhov kev ntxhov siab tas mus li so tus nqi sib txawv. Qhov ntsuas kub ntawm LZ-75 cib yog 1120-1130 degree ; qhov ntsuas kub ntawm LZ-48 cib yog 1050 degree ; thiab tsis muaj qhov hloov pauv loj yog pom rau zirconium corundum cib. Qhov kub-temperature fracture strain rate thiab stiffness strain rate ntawm high-aluminium refractory bricks uas muaj zirconium corundum thiab corundum pib tig ntawm 800 degree; lub zog tensile pib tig ib ncig ntawm 1000 degree. Lawv muaj cov ntsiab lus sib txawv, uas yog, los ntawm chav tsev kub txog 1000 degree, lawv lub zog compressive nce nrog qhov kub thiab txias, uas qhia tau hais tias thermal deformation ntawm ob theem siv lead ua kom txo tau qhov seem thermal stress, kaw lub microcracks, thiab ua kom lub zog compressive. .
Vim hais tias lub load softening kub ntawm high-aluminium rwb thaiv tsev bricks yog ib tug tseem ceeb khoom. Qhov kev sim qhia tau hais tias nws hloov pauv nrog kev hloov pauv ntawm Al2O3 dej cov ntsiab lus nyob rau hauv high-aluminium rwb thaiv tsev cib: thaum Al2O3 cov ntsiab lus dej tsawg tshaj li qhov theoretical muaj pes tsawg leeg ntawm zirconium corundum, lub equilibrium theem nyob rau hauv high-aluminium rwb thaiv tsev cib yog zirconium corundum-laminated. iav theem. Cov dej ntsiab lus ntawm zirconium corundum nce nrog qhov nce ntawm Al2O3 dej cov ntsiab lus, thiab cov load softening kub kuj nce raws li. Lub thermal shock tsis kam ntawm high-alumina rwb thaiv tsev cib yog qhov phem dua li cov av nplaum cib, thiab 850 degree dej txias lub voj voog yog 3 mus rau 5 zaug. Qhov laj thawj tseem ceeb yog qhov thermal deformation ntawm corundum siab dua li ntawm zirconium corundum, thiab tsis muaj kev hloov pauv siv lead ua. Qhov sib txawv ntawm qhov kub thiab txias cuam tshuam ntawm thawj qib siab alumina refractory cib thiab qib peb-qib aluminium refractory cib tau muab piv. Hauv kev tsim khoom, cov txheej txheem ntawm kev kho qhov muaj pes tsawg leeg ntawm cov av nkos feem ntau yog siv los txhim kho cov qauv particle cov yam ntxwv ntawm high-alumina rwb thaiv tsev cib, yog li txhim kho lawv qhov kub thiab txias tsis kam. Nyob rau hauv xyoo tas los no, ib co nyiaj ntawm hluavtaws cordierite tau ntxiv rau seasoning ntawm high-alumina rwb thaiv tsev bricks los tsim high-alumina rwb thaiv tsev bricks nrog high-temperature shock resistance, thiab cov txiaj ntsig tseem ceeb tau ua tiav.
