Iimveliso zeChromium Corundum Refractory
Ingcaciso yeMveliso
Izinto ezisetyenziswa ekrwada kwiimveliso ze-chromium corundum sisisombululo esiqinileyo esenziwe ngokunyibilika kobushushu obuphezulu be-alumina kunye ne-chromium oxide kumlinganiselo othile.Eyona mathiriyeli ekrwada yi-bauxite ephezulu (okanye i-alumina yamashishini) ngokongeza isixa esifanelekileyo sechromite kunye nokunciphisa.I-ejenti inyibilika kwiqondo lokushisa eliphezulu kwiziko lombane, kwaye i-chromium etyhidiweyo igalelwe kwi-mold ukuze ipholiswe kancinane, kwaye emva koko yenziwe emva kokuba i-annealing..
Imveliso ye-Chromium corundum refractory edityanisiweyo ye-chrnmecorundum refrac-tory ikwabizwa ngokuba yi-fused cast chrnmecorundum refrac-tory.Imveliso ye-refractory edibeneyo eyenziwe ngesisombululo esiqinileyo se-alumina kunye ne-chromium oxide kunye nenani elincinci le-spinel, eliqulethe i-60% ukuya kwi-87% ye-alumina kunye ne-30% ye-chromium oxide.Ubuninzi be-bulk density yi-3.2-3.9g / cm3;, amandla okushisa aphezulu aphezulu, xa kuthelekiswa nezinye iintlobo ze-corundum refractories, ukuxhatshazwa kwe-corrosion ye-glass melt iyona inamandla.Ingasetyenziswa njengolwaleko lweziko oludibana ngokuthe ngqo neglasi etyhidiweyo.
I-Chromium corundum refractories isetyenziswa ngokubanzi kumbane we-slurry pressurized gasifier, i-ladle yokucoca iziko kunye ne-carbon black reactor lining, i-petrochemical industry slag i-gasification i-furnace lining kunye neglasi yokunyibilika kwesithando somlilo, njl. njl., kwaye ingasetyenziselwa ukufudumeza I-chrome Isitena seqonga lecorundum yesithando somlilo sisixhobo esiyimfuneko kwishishini lobushushu obuphezulu.
I-AL203 kunye ne-Cr2O3 yesakhiwo se-corundum, i-radius ye-Cr3 + yi-0.620, kunye ne-radius ye-AL3 + yi-0.535.Ngokwefomula yobungqina:
Ekubeni umahluko phakathi kwe-Cr3+ kunye ne-AL3+ ion radii ingaphantsi kwe-15%, i-Cr ions ingakwazi ngokuqhubekayo kwaye ingenasiphelo i-AL kwi-lattice ye-AL203, yenze isisombululo esingenasiphelo esingenasiphelo esisisigxina.
Ubume bekristale be-Cr203 kunye ne-AL203 ziyafana, kwaye i-radius ye-ionic ihluke nge-13.7%.Ke ngoko, i-Cr203 kunye ne-AL203 zinokwenza isisombululo esiqinileyo esingenasiphelo kwiqondo lobushushu eliphezulu.Ukusuka kwimbono yomgca wesigaba solwelo-oluqilima, ngokunyuka komxholo we-Cr203, iqondo lobushushu apho inqanaba lolwelo liqala ukubonakala nalo liyenyuka.Ke ngoko, ukongeza inani elifanelekileyo le-Cr203 ukuya kwi-AL203 kunokuphucula kakhulu iipropathi zoomatshini kunye nokusebenza kwenkonzo yobushushu obuphezulu be-corundum refractories.
I-Cr203 inokwenza indawo ephezulu yokunyibilika okanye i-eutectic enobushushu obuphezulu bokunyibilika kunye neeoksidi ezininzi eziqhelekileyo.Umzekelo, i-FeO·Cr203 spinel eveliswe yi-Cr203 kunye ne-Feo inendawo yokunyibilika ukuya kwi-2100℃;I-Cr203 kunye ne-AL203 inokwenza isisombululo esiqinileyo esiqhubekayo.Ukongeza, i-Cr203 inokunyusa kakhulu i-viscosity ye-slag kunye nokunciphisa ukumanzi kwe-slag, ngaloo ndlela inciphisa ukubola kwe-slag kwi-refractory.Ke ngoko, ukongeza isixa esifanelekileyo se-Cr203 kwimathiriyeli echasayo kunokunciphisa kakhulu ukuchitheka kwesakhiwo semathiriyeli yelinen yesithando somlilo esibangelwa kukukhukuliseka kwe-slag.Akukho nto ibonakalayo phakathi kwesakhono sokubola kwe-slag kwi-chromium corundum refractories kunye nesiseko se-slag.
Isitena se-chromium corundum esenziwe nge-chromium corundum refractory material sisesithandweni somlilo.Xa isiseko se-slag si-2, isitena se-chromium corundum sinokumelana ne-iron slag corrosion;xa isiseko se-slag si-0.2, ubunzulu be-corrosion ye-slag yethusi ukuya kwisitena se-chromium corundum Esona sincinci;xa isiseko se-slag siyi-0.35, ubunzulu be-tin slag kwisitena se-chrome corundum buncinci;xa i-lead slag basicity yi-0.3, ubukhulu bentsalela bukhulu kunye nobunzulu be-reaction layer, i-rosion layer kunye ne-penetration layer incinci.Xa i-alkalinity ye-slag i-0.37, ukuxhathisa kwe-corrosion yezitena ze-chrome corundum iyona nto ingcono.
