Njerwa yotentha yopangira mbaula

A. Chonyamula kutentha kwa chitofu chomwe chimaphulika ndi njerwa zoyendera. Njerwa zoyipa zimadziwika ndikudziwika ndi makampani opanga zida zapadziko lonse lapansi. Ili ndi mphamvu yosinthira kutentha, malo osungira kutentha, mpweya wabwino, komanso kukana pang’ono. Khalidwe losungira kutentha kwa thupi. …

B. Njerwa za tcheki ndi mtundu wa njerwa zomwe zimakonda kugwiritsidwa ntchito m’masitovu. Pamwamba pake pamakhala yopanda malire, yokhala ndi mabowo owonekera pakati. Malinga ndi kapangidwe kake, njerwa zofufuzira zomwe zimagwiritsidwa ntchito nthawi zambiri zimakhala: mabowo 7, mabowo 19, mabowo 31, mabowo 37, mabowo 65. Malinga ndi zida zosiyanasiyana zomwe amagwiritsidwa ntchito, imagawidwa njerwa zoyesera dothi komanso njerwa zopangira alumina.

Grid m’mimba mwake mm	Mabowo asanu ndi awiri 43	Mabowo XNUMX Φ33	Mabowo XNUMX Φ30	Mabowo XNUMX Φ28	Makumi makumi atatu mphambu asanu ndi awiri Φ23	Makumi makumi atatu mphambu asanu ndi awiri Φ20
Kutentha kwachitsulo pamwamba m2 / m2	38.05	44.36	48.61	50.71	59.83	64.0
Malo okhala m2 / m2	0.409	0.366	0.365	0.355	0.344	0.320
Kutentha kosungira voliyumu m2 / m2	0.591	0.634	0.635	0.645	0.656	0.680
Mofanana makulidwe mm	31.07	28.60	26.14	25.44	21.93	21.25

C. Makhalidwe:

Ili ndi mabowo ochulukirapo owoneka bwino moyang’anizana ndi malo am’mbali, ndikuyikapo ma protrusions ndikuyika masitepe m’malo awiri ofanana.

Kukhazikika kwama voliyumu, magwiridwe antchito otentha kwambiri, kuthamanga kwambiri komanso porosity. Kuphulika kwa ng’anjo kwamoto kwamatovu otentha nthawi zambiri kumakhala mawonekedwe obwezeretsa njerwa. Njerwa zopendekera zimawonjezera malo otenthetsera, kuchepetsa kugwiritsidwa ntchito kwa njerwa zowerengera, ndikuchepetsa kwambiri kugwiritsidwa ntchito kwa zinthu zopangira masitovu otentha, potero kumachepetsa kugwiritsidwa ntchito kwa masitovu ophulika.

D. Kugwiritsa ntchito:

Pakadali pano, njerwa zoyang’anira thukuta zimagwiritsidwa ntchito kuphulitsa moto wamoto ndi masitovu amoto. Njerwa za tcheki zimagwiritsidwa ntchito pokonzanso masitovu otentha. Njerwa zoyendera zokhala ndi mabowo latisi zimakonzedwa mwadongosolo. Chapamwamba ndi chotsika kudzera m’mabowo a njerwa zoyendera zitha kulola mpweya kudutsa. Malinga ndi zofunikira zaukadaulo kwamadera osiyanasiyana otentha, njerwa zoyeserera, njerwa zadothi, ndi zina zambiri zimagwiritsidwa ntchito. M’masitovu ena otentha, njerwa zapamwamba za alumina, njerwa za mullite, njerwa za sillimanite, ndi zina.

E. Ntchito ya chitofu cha mpweya wotentha ndikutenthetsa mpweya wozizira wotumizidwa ndi wophulitsayo ku ng’anjo yamoto kulowa mpweya wotentha, kenako mpweya wotentha umatumizidwa ku ng’anjo yamoto kudzera pa chitoliro cha mpweya wotentha kuti ayake. Kuphulika kwa ng’anjo yotentha kumakhala ndi ng’anjo yoyaka moto komanso nthawi yopumira, ndipo nthawi ziwiri zogwirira ntchito zimasinthidwa nthawi ndi nthawi. M’nthawi yoyaka m’ng’anjo, mpweya wotentha kwambiri utayaka moto umadutsa m’mabowo a njerwa zowotchera za sitovu yotentha kuti isamutse kutentha kwa njerwa; Pakati pa nthawi yopereka mpweya, mpweya wozizira womwe umawomba umalowa mu mbaula yotentha ndipo umatenthedwa ndi njerwa zowunika kukhala mpweya wotentha. Imatumizidwa ku ng’anjo yamoto kudzera pa chitoliro cha mpweya wotentha.

Zizindikiro zakuthupi ndi zamankhwala:

polojekiti	Onaninso
SiO2,%	≥95
Al2O3,%	≤1
Fe2O3,%	≤1.5
Chokhalitsa, ℃	≥1710
Zikuoneka porosity,%	≤23
Kuchuluka kwa kuchuluka, g / cm3	≥1.9
Kutentha kwa 0.2MPa kumayamba, ℃	≥1650
Luso lakusinthira kwa kutenthetsanso, 1500 ℃ × 4h%	± 0.2
Kukula kwanyengo,%	≤0.2
(0.2MPa, 1500 ℃, 20-50h)
Zotsalira za quartz%	≤1.0