Alumina Bubble Bricks yog ua los ntawm alumina hollow npas thiab alumina hmoov ua cov ntaub ntawv tseem ceeb, ua ke nrog lwm cov binders, thiab raug rho tawm haujlwm ntawm qhov kub ntawm 1750 degrees. Nws belongs rau ib hom ntawm ultra-siab kub cov khoom siv hluav taws xob-txuag thermal rwb thaiv tsev khoom.
Kev ua tau zoo
Cov ntsiab lus Al2O3 ntawm alumina hollow pob cib tsis tsawg tshaj li 98 feem pua, SiO2 cov ntsiab lus tsis ntau tshaj 0.5 feem pua, Fe2O3 cov ntsiab lus tsis ntau tshaj 0.2 feem pua, qhov ntau ntom yog 1.3 ~ 1.4g / cm3, thiab qhov pom tseeb porosity yog 60 feem pua ~ 8{22}} feem pua, lub compressive zog tsis tsawg tshaj li 9.8MPa, qhov muag kub nyob rau hauv load ({24}} .2MPa) tsis tsawg dua 1700 degree, thiab thermal conductivity yog 0.7 ~ 0.8W / (m?K).
Ua ntej npaj alumina hollow spheres, thiab tom qab ntawd ua Alumina Bubble Bricks.
Kauj Ruam 1. Kev npaj ntawm alumina-aluminium hollow spheres
Kev npaj ntawm alumina hollow spheres yog ua los ntawm kev lag luam alumina ua raw khoom, uas yog yaj los ntawm electrofusion txoj kev thiab ces sprayed. Cov khoom siv hluav taws xob melting yog hluav taws xob arc rauv. Lub pas dej molten yog ua los ntawm cov khoom siv graphite lossis lwm yam khoom siv refractory, qhov chaw nres nkoj ntws tau ua rau ntawm ntug, thiab lub tshuab cua compressed yog ntsia sab nraum qhov chaw nres nkoj. Lub nozzle txuas nrog lub tshuab cua compressed los ntawm cov yeeb nkab; lub cub tawg lub cev tuaj yeem tig tau; electrode yog ua los ntawm graphite.
Tom qab ntxiv cov hmoov alumina rau hauv lub pas dej molten, nws tuaj yeem siv tau thiab yaj. Thaum qhov kub ntawm cov hlau molten nce mus txog los yog siab tshaj 2200 degree, cov hlau molten rolls, uas yog, lub cub tawg lub cev yog tilted kom cov molten molten hlau ntws tawm; Vim cov nyhuv ntawm yaj viscosity thiab nro saum npoo, cov yaj ua ib qho hollow sphere qhwv nrog cua thaum lub tshuab tshuab thiab condensation. Tom qab sau thiab tshuaj ntsuam xyuas, lawv tau muab cais raws li cov khoom sib txawv.
Qhov kev faib ua feem ntawm tus naj npawb ntawm alumina hollow spheres nrog qhov sib txawv particle loj sib txawv nrog rau kev txhaj tshuaj ntawm compressed cua. Qhov siab dua, ntau qhov me me spheres.
Phab ntsa thickness ntawm lub hollow kheej kheej txawv nrog cov particle loj. Thaum cov particle loj fluctuates nyob rau hauv qhov ntau ntawm {{0}}.5mm, phab ntsa thickness sib hloov pauv nyob rau hauv qhov ntau ntawm 0.3-0.1mm.
Qhov loj dua qhov particle loj ntawm lub hollow kheej kheej, qhov me me nws cov khoom loj; qhov me me ntawm cov particle loj, qhov loj dua nws cov natural bulk ntom. Piv txwv li: thaum lub particle loj yog 5.13-3.22mm, lub ntuj tej ntom yog 470g/L; thaum 3.22-2. thaum 2.0-1.0mm, 810g/L; 1.0 ~ 0.5 hli, 915g / L.
Kauj Ruam 2: Ua Alumina Bubble Cib
Kev tsim cov alumina hollow pob cib Lub alumina hollow npas, sintered alumina nplua hmoov thiab binder yog batched, zoo li tus, qhuav thiab raug rho tawm haujlwm nyob rau hauv ib qho kev faib ua feem kom tau alumina hollow pob cib.
Alumina hmoov hmoov yog tsim los ntawm cov khoom siv alumina ua raw khoom, calcined ntawm 1500 degree, hauv av, pickled thiab qhuav.
Cov binder siv hauv cib feem ntau yog txhuas sulfate aqueous tov los yog txhuas dihydrogen phosphate aqueous tov.
Qhov loj me me ntawm alumina hollow spheres feem ntau yog 5-0.5 hli, dej nag yog 65 feem pua -70 feem pua, tus nqi ntawm alumina nplua hmoov yog 30 feem pua -35 feem pua , thiab tus nqi ntawm cov binder yog 5 feem pua.
Cov ntaub ntawv saum toj no yog sib tov sib npaug thiab tsim los ntawm kev vibration molding. Tom qab ziab, cov cib raug rho tawm haujlwm ntawm 1500-1800 degree kom tau cov cib raug rho tawm haujlwm; Cov khoom siv tsis raug hluav taws xob kuj tuaj yeem tsim tau yam tsis muaj hluav taws xob, lossis cov khoom siv hluav taws xob tuaj yeem tsim ncaj qha nrog cov khoom siv amorphous.
Daim ntawv thov ntawm Alumina Bubble Brick
Alumina hollow pob cib feem ntau yog siv los ua cov ntaub ntawv rau cov khoom kub kub hauv qab 1800 degree, xws li hauv ob sab phlu rau cov kub kub hauv cov khoom siv hluav taws xob, hluav taws xob, thiab cov khoom siv ceramic; thermal rwb thaiv tsev txheej rau high-temperature thermal khoom, xws li petrochemical industrial gas rwb thaiv tsev bricks rau tshuaj furnaces, roj ua rauv, carbon dub industrial reactors, thiab induction furnaces nyob rau hauv metallurgical kev lag luam. Daim ntawv thov hauv cov teb saum toj no tuaj yeem txuag hluav taws xob los ntawm 20 feem pua rau 30 feem pua. Cov cib no yog siv los ua cov txheej txheej ntawm cov kub kub kub, thiab cov cua kub ceev yuav tsum tsis txhob ceev heev thaum lub sij hawm ci, txwv tsis pub cov kab nrib pleb yuav tshwm sim thiab lub zog thiab kev pab cuam lub neej yuav raug txo; vim nws qhov pom meej porosity siab, nws tsis tuaj yeem siv nyob rau hauv qhov chaw uas hu rau lub slag, txwv tsis pub nws yuav puas los ntawm kev nkag mus ntawm slag.
