Mullite casting inogadzirwa neyemhando yepamusoro porous mullite aggregate, ichiwedzera hupfu hwakatsetseka uye zvinowedzera kumutsa refractory castings.Iyo yakakosha particle size ye mullite aggregate i12mm;Iyo tembiricha yekushandisa kwenguva yakareba ndeye 1350 ℃.Kuvakwa kwemullite yakakwirira-simba kupfeka-resistant refractory castable yakasimba.Iyo refractory castable inofanira kusanganiswa nemvura yakachena.Iyo formwork yakadirwa nemvura ichava nekuoma kwakakwana uye simba.Saizi ye mold ichave yakarurama.Deformation ichadziviswa panguva yekuvaka.Majoini eformwork anofanira kunge akasimba.
Mune zvinodiwa zvekuvaka zvemullite refractory castable, anti sticking matanho anozotorwa kune iyo fomu, uye pamusoro peiyo thermal insulation masonry inobata inokandwa ichave isina mvura.Iyo yakakandwa ichasanganiswa nemuvhenganisi wakasimba.Nguva yekusanganiswa uye vhoriyamu yemvura ichave maererano nemirairo yekuvaka.Musanganisi, hopa uye chigadziko chekuyeresa chinocheneswa pakuchinja huwandu hwematireyi.Iko kusanganiswa kweakasanganiswa castings kuchapedzwa mukati me30min kana zvinoenderana nemirairo yekuvaka.Zvitsva zvakaumbwa zvekukanda hazvifanirwe kushandiswa.Iyo yakakosha yekuwedzera yejoint ye cast refractory ichaiswa zvinoenderana nezvinodiwa zvekugadzira.
Hapana simba rekunze kana vibration richashandiswa panguva yekurapa.Vhura mold.Hapana formwork ichatakurwa, uye kusimba kwechinhu chekukanda kuchave chekuti nzvimbo uye makona eforoma yakapetwa haina kukuvadzwa kana kuremara uye inogona kubviswa.Mushure mekunge zvinhu zvekukanda zvinosvika 70% yesimba rekugadzira, iyo inotakura formwork ichabviswa.Iyo inopisa uye yakaoma castings ichabikwa kune yakatarwa tembiricha isati yapeta.Iyo yekudira lining surface haifaniri kusvuuka, kutsemuka, mapako, nezvimwewo.Prefabricated refractory castings haifaniri kurongedzerwa mumhepo yakashama.Matanho ekudzivirira kunaya kwemvura uye hunyoro-hunyoro hunofanirwa kutorwa pakuturika mumhepo.
Iyo mullite castable ine tembiricha yakakwira uye inogona kuvhenekerwa zvakananga kune yekushanda lining, ichiziva yakakwira tembiricha yekuchengetedza simba, light unit uremu uye 40 ~ 60% kuderedzwa kwechimiro uremu Kuderera kwekushisa conductivity, porous mullite aggregate, yakaderera thermal conductivity, yakanaka yekupisa kupisa kuita. , kuomeswa nekukurumidza, kupfupisa nguva yekuomesa, zvakakosha zvehupfumi zvinobatsira.
Rudzi rwebhainda rakagadzirwa nemullite rinokandwa rinogona kuchengetedza kuita kwakanaka kwemullite.Binder ndiyo yakanakisa bhainda, inogona kuumba mullite pane imwe tembiricha.Tichifunga nezvekushandiswa kwekukandwa muzviitiko zvakasiyana-siyana, mullite inofanira kuumbwa pane yakaderera tembiricha sezvinobvira.Zviripachena, silica gel inonamira yakakodzera.Tichifunga nezvemutengo wakaderera, silica gel inoshandiswa kuzvifananidza colloidal suspension, umo Al2O3: SiO2 inofanira kuva pedyo kana kuenzana nechikamu chemullite.
Aluminium ine yakanaka hydration uye zvakasikwa kuomesa zvinhu.Chiitiko chepamusoro chakanyanya kukwirira, saka basa rayo mukuramba kuchinjika ndeyekuita neSiO2poda kugadzira mullite pane yakaderera tembiricha, saka iyo yekuwedzera huwandu hweAl2O3+SiO2bhainda rakakodzera.Mhedzisiro yacho inoratidza kuti mabhii maviri aya anogona kuumba mullite uye ave nesimba rakanaka rekutonhora.
Nguva yekutumira: Oct-24-2022