Kodi pali kusiyana kotani pakati njerwa zapamwamba za alumina ndi njerwa zadongo?

Anthu mu makampani otsutsa amadziwa zomwe njerwa zadongo ndi njerwa zapamwamba za alumina zimachokera ku maonekedwe, koma ngati mutamufunsa kuti afotokoze kusiyana pakati pa njerwa zadongo ndi njerwa zapamwamba za alumina, anthu ambiri sadziwa. Masiku ano opanga Zhengzhou Sheng Energy refractory afotokoza:

Njerwa zazitali za aluminiyamu nthawi zambiri zimapangidwa ndi aluminiyamu yapamwamba kwambiri ya bauxite clinker kuphatikiza dongo laling’ono, pambuyo pake, zimatsanuliridwa ndikuwumbidwa ngati matope ndi njira yopangira mpweya kapena njira ya thovu, kenako amawotchedwa 1300-1500 °. C. Nthawi zina aluminiyamu yamafakitale angagwiritsidwe ntchito m’malo mwa bauxite clinker. Amagwiritsidwa ntchito popanga nsanjika ndi kutsekereza kutentha kwa ng’anjo zamiyala, komanso mbali zomwe sizinawonongeke komanso zowombedwa ndi zida zotentha zotentha kwambiri. Mukakumana ndi lawi lamoto, kutentha kwapamtunda sikuyenera kupitirira 1350 ℃.

High aluminiyamu njerwa ndi apamwamba refractoriness ndi katundu kufewetsa kutentha kuposa dongo njerwa, ndi bwino slag dzimbiri kukana (makamaka asidi slag), ndi katundu izi kuwonjezeka ndi kuchuluka kwa okhutira Al2O3, koma bata matenthedwe si bwino ngati dongo njerwa. Njerwa zapamwamba za alumina zimakhala ndi kachulukidwe kwambiri, porosity yochepa, mphamvu zamakina apamwamba komanso kukana kuvala. Mutu wa ng’anjo ya chipinda choyaka moto cha coke ndi njerwa zapansi za chipinda cha carbonization zimamangidwa ndi njerwa zapamwamba za alumina, ndipo zotsatira zake zimakhala bwino; koma sizoyenera khoma la chipinda cha carbonization, chifukwa njerwa zapamwamba za alumina zimakhala zosavuta kupiringa ngodya pa kutentha kwakukulu. .

Njerwa zadongo, zotsekera zotsekemera zotentha zimatanthawuza zokanira zokhala ndi porosity yayikulu, kachulukidwe kakang’ono kocheperako komanso kutsika kwamafuta. Ma refractory otenthetsera matenthedwe amatchedwanso ma refractory opepuka, omwe amaphatikizira zinthu zosungunulira zamafuta, ma refractory fibers ndi zinthu za refractory fiber. matenthedwe kutchinjiriza refractories yodziwika ndi mkulu porosity, zambiri 40% -85%; otsika kachulukidwe chochuluka pansi 1.5g/cm3; otsika matenthedwe madutsidwe, nthawi zambiri pansi 1.0W (mK).

Zimagwira ntchito ngati zopangira zotenthetsera zamafuta opangira mafakitale, zomwe zimatha kuchepetsa kutentha kwa ng’anjo, kupulumutsa mphamvu, komanso kuchepetsa zida zotentha. Thermal kutchinjiriza refractories ndi osauka makina mphamvu, kukana abrasion ndi kukana dzimbiri slag, ndipo si oyenera katundu katundu dongosolo la ng’anjo ndi kukhudzana mwachindunji ndi slag, mlandu, chitsulo chosungunuka ndi mbali zina.

Njerwa zadongo ndi zinthu zofooka za acidic refractory, zomwe zimatha kukana kukokoloka kwa acidic slag ndi mpweya wa acidic, ndipo zimakhala zofooka pang’ono kukana zinthu zamchere. Njerwa zadongo zimakhala ndi kutentha kwabwino ndipo zimagonjetsedwa ndi kuzizira kofulumira komanso kutentha kwambiri.

Kukana kwa njerwa zadongo kumafanana ndi njerwa za silika, mpaka 1690 ~ 1730 ℃, koma kutentha kwake kofewa pansi pa katundu ndikotsika kuposa 200 ℃ kuposa njerwa ya silika. Chifukwa njerwa ya dongo imakhala ndi makristalo a mullite okhala ndi kukana kwakukulu, ilinso ndi pafupifupi theka la gawo lotsika losungunuka lagalasi la amorphous.

Pamwambapa pali kusiyana pakati pa njerwa zapamwamba za alumina ndi njerwa zadongo. Ndikukhulupirira kuti zikhala zothandiza kwa inu. Chonde khalani omasuka kulumikizana nafe ngati mukufuna.