Loj siv lead ua fused magnesite

Magnesiayog ib qho ntawm cov khoom siv raw rau refractories. Kuj hu ua magnesia refractory raw cov ntaub ntawv, nws hais txog raw cov ntaub ntawv nrog MgO ua lub ntsiab tivthaiv thiab periclase raws li lub ntsiab siv lead ua theem. Magnesia tuaj yeem muab faib ua ob pawg: sintered magnesia thiab fused magnesia. Niaj hnub no, ib lub chaw tsim tshuaj paus magnesia yuav luv luv sintered magnesia thiab fused magnesia.

SinteredMagnesiayog sintered block tau los ntawm calcining ntuj magnesite ore MgCo3 ntawm qhov kub thiab txias, thiab ces crushed thiab tshuaj ntsuam. Los yog magnesium oxide raw khoom tau los ntawm tag nrho sintering magnesium hydroxide ua los ntawm seawater los yog brine ntawm 1450-1900℃. Feem ntau hais lus, sintered magnesia yog hais txog cov khoom tau los ntawm calcining magnesite li raw khoom. Vim tias qhov kub ntawm sintering ntawm magnesite yog siab thiab qib ntawm sintering yog qhov zoo, sintered magnesia kuj hu ua tuag-hlwb magnesia. Magnesium txawv. Nws yog cov khoom siv raw rau kev tsim cov pob zeb magnesia zoo tib yam thiab tsis zoo li cov refractories.

Fused magnesiayog ib yam khoom siv magnesia uas tsim los ntawm melting ntuj magnesite, lub teeb - hlawv magnesia hmoov los yog sintered magnesia nyob rau hauv lub cub hluav taws xob arc ntawm qhov kub ntawm 2750 degrees. Vim nws lub zog, corrosion kuj thiab tshuaj inertness, nws yog zoo dua sintered Magnesia. Periclase muaj cov khoom siv lead ua loj loj, cov qauv compact, zoo slag kuj, thiab zoo ntim ruaj khov ntawm qhov kub thiab txias. Nws tau nce ntxiv hloov sintered magnesia hauv magnesia thiab magnesia-carbon refractories. Nws yog cov khoom siv raw khoom zoo rau qib siab - qib pib cib, carbon- muaj cov khoom lag luam thiab cov khoom siv tsis zoo.

Thaum twgmagnesiteyog calcined ntawm 700-950 degree, tag nrho cov pa roj carbon dioxide yuav khiav, thiab qhov tshwm sim magnesia yog mos, ntxeem tau, xoob thiab yooj yim rau agglomerate (tseem hu ua caustic magnesia), uas tsis tuaj yeem siv rau casting. Lub magnesia siv rau casting yuav tsum yog lub thiaj li hu ua burnt magnesia uas tau calcined ntawm 1550-1600 degree. Tom qab calcination ntawm qhov kub thiab txias, cov magnesia crystallizes los ua periclase, cov hais yog ntom thiab tawv, thiab yuav tsis hydrate, yog li nws yuav tsis Shrinkage tshwm sim. Txwv tsis pub, thaum siv los ua cov xuab zeb tseem ceeb, cov castings yog qhov ua rau lub qhov hws, thiab thaum siv los ua cov txheej txheej, cov txheej txheem yuav ua rau tawg.