Mitundu ya 7 ya Corundum Refractory Raw Yaiwisi Zomwe Amagwiritsidwa Ntchito Pazinthu Zowonongeka

01 Sanalankhula Corundum
Sintered corundum, yomwe imadziwikanso kuti sintered alumina kapena semi-molten alumina, ndi clinker yopingasa yopangidwa kuchokera ku calcined alumina kapena aluminiyamu yamafakitale ngati zopangira, zoyikidwa mumipira kapena matupi obiriwira, ndikuwotchedwa pa kutentha kwakukulu kwa 1750 ~ 1900 ° C.

Sintered aluminiyamu yokhala ndi 99% ya aluminium oxide nthawi zambiri imapangidwa ndi yunifolomu yabwino-grained corundum yophatikizidwa mwachindunji. Kuchuluka kwa mpweya wa gasi kumakhala pansi pa 3.0%, kuchuluka kwa voliyumu kumafika 3.60% / cubic mita, refractoriness ili pafupi ndi malo osungunuka a corundum, imakhala ndi kukhazikika kwa voliyumu ndi kukhazikika kwa mankhwala pa kutentha kwakukulu, ndipo sikuwonongeka ndi kuchepetsa mlengalenga, galasi losungunuka ndi chitsulo chosungunuka. , mphamvu yabwino yamakina ndi kuvala kukana kutentha kwabwino komanso kutentha kwakukulu.

02Fused Corundum
Fused corundum ndi corundum yochita kupanga posungunula ufa wa alumina mu ng'anjo yamagetsi yotentha kwambiri. Ili ndi mawonekedwe a malo osungunuka kwambiri, mphamvu zamakina apamwamba, kukana kugwedezeka kwamafuta, kukana kwa dzimbiri kolimba komanso kowonjezera kakang'ono ka mzere wokulirapo. Fused corundum ndi zinthu zopangira zopangira zida zapamwamba zapamwamba kwambiri. Makamaka amaphatikiza white corundum, corundum yofiirira, sub-white corundum, ndi zina.

03Fused White Corundum
Chosakaniza choyera corundum chimapangidwa kuchokera ku ufa wa alumina woyengedwa ndikusungunuka kutentha kwambiri. Ndi yoyera mu mtundu. Njira yosungunula ya white corundum ndiyo njira yosungunuka ndi kukonzanso ufa wa alumina wa mafakitale, ndipo palibe njira yochepetsera. Zomwe zili mu Al2O3 sizochepera 9%, ndipo zonyansa ndizochepa kwambiri. Kulimba kwake ndi kocheperako pang'ono kuposa korundum ya bulauni ndipo kulimba kwake ndikotsika pang'ono. Nthawi zambiri amagwiritsidwa ntchito popanga zida zonyezimira, zida zapadera za ceramic ndi zida zapamwamba zokanira.

04Fused Brown Corundum
Corundum ya bulauni yosakanikirana imapangidwa kuchokera ku aluminiyamu yapamwamba kwambiri monga zopangira zazikulu komanso zosakanizidwa ndi coke (anthracite), ndipo imasungunuka mu ng'anjo yamagetsi yotentha kwambiri pa kutentha pamwamba pa 2000 ° C. Corundum ya bulauni yophatikizika imakhala ndi mawonekedwe owundana komanso olimba kwambiri ndipo imagwiritsidwa ntchito nthawi zambiri muzoumba zadothi, zopangira zowoneka bwino komanso zida zapamwamba zokanira.

05Sub-white Corundum
Subwhite corundum imapangidwa ndi electromelting giredi yapadera kapena giredi yoyamba bauxite pansi pa kuchepetsa mpweya ndi mikhalidwe yoyendetsedwa. Mukasungunuka, onjezerani chochepetsera (carbon), chokhazikika (zosefera zachitsulo) ndi decarburizing (sikelo yachitsulo). Chifukwa chakuti mankhwala ake ndi katundu wake ali pafupi ndi white corundum, amatchedwa sub-white corundum. Kuchulukana kwake kuli pamwamba pa 3.80g/cm3 ndipo porosity yake yowoneka ndi yochepera 4%. Ndizinthu zabwino zopangira zida zapamwamba zokanira ndi zida zosavala.

06Chrome corundum
Pamaziko a white corundum, 22% chromium imawonjezeredwa, ndipo imapangidwa ndi kusungunula mu ng'anjo yamagetsi yamagetsi. Mtundu wake ndi wofiirira-wofiira. Kulimba kumakhala kokwera pang'ono kuposa korundum yofiirira, yofanana ndi white corundum, ndipo kulimba kwapang'ono kumatha kukhala 2200-2300Kg/mm2. Kulimba kwake ndikwapamwamba kuposa kwa white corundum komanso kutsika pang'ono kuposa brown corundum.

07Zirconium Corundum
Zirconium corundum ndi mtundu wa corundum wopangidwa ndi kusungunula alumina ndi zirconium oxide pa kutentha kwakukulu mu ng'anjo yamagetsi yamagetsi, crystallizing, kuzirala, kuphwanya ndi kuwunika. Gawo lalikulu la kristalo la zirconium corundum ndi α-Al2O3, gawo lachiwiri la crystal ndi baddeleyite, komanso pali gawo laling'ono la galasi. Ma crystal morphology ndi kapangidwe ka zirconium corundum ndizofunikira kwambiri zomwe zimakhudza mtundu wake. Zirconium corundum ili ndi mawonekedwe a kuuma kwakukulu, kulimba kwabwino, kulimba kwambiri, mawonekedwe owundana, mphamvu yakupera yamphamvu, katundu wokhazikika wamankhwala, komanso kukana kwamphamvu kwamafuta. Amagwiritsidwa ntchito kwambiri m'mafakitale a abrasives ndi refractory materials. Malinga ndi zomwe zili zirconium oxide, zitha kugawidwa m'magulu awiri: ZA25 ndi ZA40.