Ngwaahịa Ntugharị Chromium Corundum
nkọwa ngwaahịa
Ngwa eji eme ihe na ngwaahịa chromium corundum usoro bụ ihe ngwọta siri ike nke agbaze nke alumina na chromium oxide na-ekpo ọkụ na-arụ ọrụ n'otu akụkụ.Isi akụrụngwa bụ nnukwu bauxite (ma ọ bụ alumina ụlọ ọrụ) site na ịgbakwunye chromite kwesịrị ekwesị ma belata ya.A na-agbaze onye ọrụ ahụ na okpomọkụ dị elu na ọkụ eletrik, a na-awụsa chromium a wụrụ awụ n'ime ihe a na-eji nwayọọ nwayọọ mee ka ọ dị jụụ, mgbe ahụ, a na-eme ya mgbe ọ gbasasịrị..
Chromium corundum refractory ngwaahịa agwakọtara nkedo chrnmecorundum refrac-tory ka a na-akpọkwa fused chrnmecorundum refrac-tory.Ngwaahịa refractory nke nkedo jikọtara ọnụ nke mejupụtara ihe ngwọta siri ike nke alumina na chromium oxide na obere obere spinel, nke nwere 60% ruo 87% nke alumina na 30% nke chromium oxide.Nnukwu njupụta bụ 3.2-3.9g / cm3;, ike okpomọkụ dị elu dị elu, ma e jiri ya tụnyere ụdị corundum refractories ndị ọzọ, nkwụsị nke corrosion nke iko agbaze bụ ike kachasị ike.Enwere ike iji ya dị ka mkpuchi nke kiln nke na-ejikọta ya na iko a wụrụ awụ.
A na-eji Chromium corundum refractories eme ihe na mkpuchi nke coal-water slurry pressurized gasifier, ladle refining oven na carbon black reactor lining, petrochemical Industry slag gasification furnace lining na iko agbaze ọkụ lining, wdg, na nwekwara ike iji kpo oku The chrome. corundum ikpo okwu brik maka ọkụ bụ ihe dị mkpa na ụlọ ọrụ okpomọkụ dị elu.
AL203 na Cr2O3 so na nhazi corundum, radius nke Cr3+ bụ 0.620, na radius nke AL3+ bụ 0.535.Dị ka usoro ihe omume si dị:
Ebe ọ bụ na ọdịiche dị n'etiti Cr3 + na AL3 + ion radii bụ ihe na-erughị 15%, Cr ions nwere ike na-aga n'ihu na-enweghị njedebe dochie AL na AL203 lattice, na-akpụ a enweghi ngwụcha na-aga n'ihu nnọchi siri ike ngwọta.
Ọdịdị kristal nke Cr203 na AL203 bụ otu, na radius ionic dị iche site na 13.7%.Ya mere, Cr203 na AL203 nwere ike ịmepụta ngwọta siri ike na-enweghị njedebe na okpomọkụ dị elu.Site n'echiche nke ahịrị usoro mmiri siri ike, yana mmụba nke ọdịnaya Cr203, ọnọdụ okpomọkụ nke usoro mmiri na-amalite ịpụta na-ebilikwa.Ya mere, itinye ego kwesịrị ekwesị nke Cr203 na AL203 nwere ike imeziwanye ihe ndị na-emepụta ihe na ọrụ okpomọkụ dị elu nke corundum refractories.
Cr203 nwere ike ịmepụta ogige mgbaze dị elu ma ọ bụ eutectic nwere okpomọkụ na-agbaze dị elu nke nwere ọtụtụ oxides nkịtị.Dịka ọmụmaatụ, FeO ·Cr203 spinel mepụtara site na Cr203 na Feo nwere ebe mgbaze dị elu dị ka 2100 ℃;Cr203 na AL203 nwere ike ịmepụta ngwọta siri ike na-aga n'ihu.Na mgbakwunye, Cr203 nwekwara ike ịbawanye viscosity nke slag nke ukwuu ma belata mmịpụta nke slag, si otú ahụ belata corrosion nke slag na refractory.Ya mere, ịgbakwụnye Cr203 kwesịrị ekwesị na ihe nkwụghachi azụ nwere ike belata nhụsianya nhazi nke ihe mkpuchi ọkụ na-akpata site na nkwụsị nke slag.Ọ dịghị ihe doro anya mgbe niile n'etiti ikike corrosion nke slag na chromium corundum refractories na isi nke slag.
Brick chromium corundum nke chromium corundum refractory ihe dị n'ime ọkụ.Mgbe slag basicity bụ 2, chromium corundum brik nwere ihe kacha mma na-eguzogide ígwè slag corrosion;mgbe slag isi bụ 0.2, ihe omimi corrosion nke ọla kọpa slag na chromium corundum brik Nke kacha nta;mgbe slag isi bụ 0.35, ihe omimi corrosion nke tin slag na chrome corundum brik bụ nke kacha nta;mgbe isi slag na-edu ndú bụ 0.3, ọkpụkpụ nke ihe fọdụrụ bụ nke kasị ukwuu na omimi nke oyi akwa mmeghachi omume, oyi akwa na-ekpo ọkụ na ntinye ntinye bụ nke kacha nta.Mgbe slag alkalinity bụ 0.37, nguzogide corrosion nke brik chrome corundum kacha mma.
