Mkanda woyandama ndi mtundu wa mpira womwe umayandama pamadzi.Ndi yotuwa yotuwa, yopyapyala komanso yopanda khoma, yopepuka kwambiri, yolemera 720kg/m3 (yolemera) ndi 418.8kg/m3 (kuwala), kukula kwa tinthu pafupifupi 0.1mm, yotsekedwa komanso yosalala pamwamba, yaying'ono mkati. matenthedwe madutsidwe, ndi moto kukana ≥ 1610 ℃.Ndi yabwino kwambiri kutentha kusunga refractory, chimagwiritsidwa ntchito popanga ma castables kuwala ndi kubowola mafuta.Kapangidwe kake ka mkanda woyandama ndi silicon dioxide ndi aluminium oxide.Ili ndi mawonekedwe ambiri, monga tinthu tating'onoting'ono, tobowo, kulemera kwake, mphamvu yayikulu, kukana kuvala, kukana kutentha kwambiri, kutchinjiriza kwamafuta, kutchinjiriza ndi kuchedwa kwamoto.Ndi imodzi mwazinthu zomwe zimagwiritsidwa ntchito kwambiri pamakampani olimbana ndi moto.

Mawu Oyamba

Kuchita bwino kwambiri komanso kugwiritsa ntchito mikanda yoyandama

Kukana moto wapamwamba.Zigawo zazikulu za mankhwala a mkanda woyandama ndi silicon ndi ma aluminium oxides, omwe silicon dioxide ndi pafupifupi 48-66% ndi aluminium oxide pafupifupi 26-36%.Chifukwa malo osungunuka a silicon dioxide ndi 1720 ℃ ndipo aluminum oxide ndi 2060 ℃, onsewa ndi otsutsa kwambiri.Chifukwa chake, mkanda woyandama uli ndi kukana kwambiri kwa moto, womwe nthawi zambiri umafika 1620-1800 ℃, ndikuupanga kukhala wotsutsa kwambiri wochita bwino kwambiri.Kulemera kopepuka, kutchinjiriza kwamafuta.Khoma la mkanda woyandamawo ndi wopyapyala komanso wabowo, ndipo pabowo ndi semi vacuum.Pali mpweya wochepa kwambiri (N2, H2, CO2, ndi zina zotero), ndipo kutentha kumakhala kochedwa kwambiri.Chifukwa chake, mikanda yoyandama singolemera kokha (250-450 kg/m3).Kukula kwachilengedwe kwa mikanda yoyandama ndi 1-250 microns.Drift mikanda ingagwiritsidwe ntchito mwachindunji popanda kugaya.The fineness akhoza kukwaniritsa zosowa zosiyanasiyana mankhwala.Zida zina zotchinjiriza zopepuka nthawi zambiri zimakhala zazikulu (monga perlite).Ngati akupera, mphamvuyo idzawonjezeka kwambiri, ndipo kutentha kwa kutentha kudzachepetsedwa kwambiri.Pachifukwa ichi, Drifting mikanda ili ndi ubwino.Kusungunula kwabwino kwamagetsi.Mkanda woyandama pambuyo posankhidwa mkanda wa maginito ndi chinthu chotetezera chomwe chimagwira bwino ntchito ndipo sichiyendetsa magetsi.Kawirikawiri, kukana kwa ma insulators kumachepa ndi kutentha kwa kutentha, pamene mikanda yoyandama imawonjezeka ndi kuwonjezeka kwa kutentha.Ubwinowu sukhala ndi zida zina zotetezera.Choncho, angagwiritsidwe ntchito kupanga insulating mankhwala pansi pa kutentha kwambiri.