Kev Ua Kom Qhuav Ntawm Kaolin
Jan 13, 2024| Kev ua kom qhuav yog hais txog kev ua haujlwm ntawm kaolin av nplaum thaum lub sijhawm ziab. Xws li ziab shrinkage, ziab lub zog, thiab ziab rhiab heev.
Dry shrinkage yog hais txog qhov shrinkage ntawm kaolin av nplaum tom qab lub cev qhuav dej thiab ziab. Kaolin av nplaum feem ntau ua rau lub cev qhuav dej thiab ziab ntawm qhov kub li ntawm 40-60 degree mus rau tsis tshaj 110 degree . Vim qhov tso dej tawm, qhov kev ncua deb yog luv, thiab qhov ntev thiab ntim ntawm cov qauv yuav ntsws. Qhuav shrinkage yog muab faib ua linear shrinkage thiab volumetric shrinkage, qhia raws li feem pua ntawm cov kev hloov nyob rau hauv ntev thiab ntim ntawm kaolin av nplaum tom qab ziab kom tas li qhov hnyav. Qhov ziab ziab ntawm kaolin feem ntau yog nruab nrab ntawm 3-10%. Qhov loj dua qhov me me, qhov loj ntawm qhov chaw tshwj xeeb, qhov zoo dua cov yas, thiab ntau dua qhov ziab kom qhuav. Lub shrinkage ntawm tib hom kaolin nws txawv nyob ntawm seb tus nqi ntawm cov dej ntxiv, nrog rau ntau yam ua rau shrinkage ntau dua. Hauv cov thev naus laus zis thev naus laus zis, kev ziab kom qhuav ntau dhau tuaj yeem ua rau deformation lossis tawg ntawm lub cev.
Lub zog ziab yog hais txog lub zog flexural ntawm av nkos tom qab ziab mus rau qhov hnyav tas li.
Drying sensitivity refers to the degree of difficulty to which deformation and cracking tendencies may occur during the drying of the billet. High sensitivity, prone to deformation and cracking during the drying process. Generally, kaolin with high drying sensitivity (drying sensitivity coefficient K>2) nws yooj yim rau kev tsim cov teeb meem; Qhov qis dua (kev ziab rhiab heev coefficient K<1) is safer in drying.