Kuitwa kukuru kwe magnesia zvidhinha

a. Refractoriness

Nekuti panonyungudika periclase (MgO) makristasi akakwira zvakanyanya, anosvika 2800 ℃, iyo refractoriness ye magnesia zvidhinha ndiyo yepamusoro-soro pakati pezvidhinha zvakajairika, kazhinji pamusoro pe2000 ℃.

b. Kusimba kwechimiro chekushisa kwepamusoro

Kusimba kwepamusoro-kupisa kwemagnesia zvidhinha hazvina kunaka, uye kutanga kunyorovesa kutonhora pasi pemutoro kuri pakati pe1500 ne1550 ° C, iyo inopfuura 500 ° C yakaderera pane refractoriness.

c. Kurwisa kweSlag

Magnesium zvidhinha ndeye alkaline refractory zvinhu uye zvine kuramba kwakasimba kune alkaline slag yakadai seCaO uye FeO. Naizvozvo, ivo vanowanzo shandiswa semasonry zvinhu zve alkaline smelting furnaces, asi kuramba kwavo kune acid slag kwakashata. Magnesium zvidhinha hazvigone kusangana ne acidic refractory zvinhu, ivo vanozoita kemikari pamwe chete uye kusvibiswa pamusoro pe1500 ° C. Nokudaro, magnesia zvidhinha hazvigoni kusanganiswa ne silica zvidhinha.

d. Thermal kugadzikana

Kugadzikana kwekupisa kwezvidhinha zvemagnesia kwakashata zvikuru, uye kunongokwanisa kumira kutonhora kwemvura kwe2 kusvika ku8 nguva, iyo ndiyo yakaipa zvikuru.

e. Kugadzikana kwehuwandu

Iyo yekupisa yekuwedzera coefficient ye magnesia zvidhinha yakakura, mutsara wekuwedzera coefficient pakati pe20 ~ 1500 ℃ ndeye 14.3 × 106, saka akakwana majoini ekuwedzera anofanirwa kusiiwa panguva yekukanya zvidhinha.

f. Thermal conductivity

Kupisa kwemafuta ezvidhinha zvemagnesia kakawanda kune zvidhinha zvevhu. Naizvozvo, chikamu chekunze chechoto chakavakwa nezvidhinha zvemagnesia kazhinji chinofanirwa kuve neyakakwana yekudzivirira kupisa kudzikisa kupisa. Nekudaro, iyo thermal conductivity ye magnesia zvidhinha inoderera nekuwedzera tembiricha.

g. Hydration

Iyo insufficiently calcined magnesium oxide inopindirana nemvura kuti iite zvinotevera: MgO+H2O→Mg(OH)2

Izvi zvinonzi hydration reaction. Nekuda kwekuita uku, vhoriyamu inowedzera kusvika 77.7%, zvichikonzera kukuvadza kwakanyanya kune magnesia zvidhinha, zvichikonzera kuputika kana mafungu. Iyo magnesia zvidhinha inofanira kuchengetedzwa kubva pakunyorova panguva yekuchengetedza.