Blast furnaces muab faib ua ob hom: qhib thiab kaw. Qhov siab tshaj plaws kev khiav hauj lwm kub ntawm lub cub tawg melting tsam yog feem ntau 1350 degree. Lub sab sauv ntawm lub qhov cub lub cev yog feem ntau raug rau mechanical hnav ntawm tus nqi. Cov khoom siv refractory feem ntau yog ua los ntawm cov av nplaum, thiab lub neej ua haujlwm yog li 3 xyoos; cov hauv ob sab phlu ntawm thaj tsam tuyere thiab cov phab ntsa inclined rauv saum toj no yog ncaj qha ua nrog cib, uas yog feem ntau raug rau siab kub, huab cua ntws scouring thiab tshuaj yaig, thiab yog yooj yim dua puas.
Cov ntaub ntawv refractory rau blast furnaces yuav tsum tiv nrog cov teeb meem ntawm qhov kub thiab txias, mechanical stress thiab chemical erosion los xyuas kom meej lawv cov qauv kev ncaj ncees thiab kev khiav hauj lwm efficiency. Dab tsi ntawm refractory bricks yog tsim rau blast furnace refractory khoom?
1: Carbon bricks
Carbon bricks yog dav siv nyob rau hauv qab thiab hearth ntawm blast furnaces vim lawv kub stability thiab zoo heev hluav taws xob conductivity. Cov pa roj carbon monoxide muaj peev xwm tswj tau cov qauv kev ruaj ntseg ntawm qhov kub siab tshaj 1700 degree, thiab muaj hluav taws xob zoo, uas tuaj yeem coj tau zoo tam sim no hauv qhov cub thiab txo qhov tsis kam. Qhov no ua rau cov pa roj carbon bricks tshwj xeeb tshaj yog haum rau cov cheeb tsam uas tuaj rau hauv kev sib cuag nrog high-temperature molten hlau thiab slag, xws li lub cub tawg hauv qab thiab lub cub tawg hearth, muab zoo heev hnav tsis kam thiab yaig kuj, ho txhim kho cov kev pab cuam lub neej ntawm lub cub tawg hauv qab.
2: High alumina cib
High alumina cibmuaj cov feem ntau ntawm alumina (Al2O3) thiab muaj refractoriness txog li 1750 degree los yog ntau tshaj, ua rau lawv zoo tagnrho rau lub cub tawg lub plab thiab rauv lub cev nyob rau hauv blast furnaces. High-alumina bricks muaj qhov hnav tsis kam thiab thermal poob siab, thiab tuaj yeem tiv taus qhov yaig ntawm tus nqi thiab kev hloov kub ceev. Nws cov refractoriness siab ua rau nws ua tau zoo nyob rau hauv kev txhawb nqa thiab tiv thaiv phab ntsa ntawm lub cub tawg los ntawm kev hnav thiab airflow, thiab yog tshwj xeeb tshaj yog haum rau siv nyob rau hauv nruab nrab thiab siab kub cheeb tsam ntawm blast furnaces, xws li lub cub tawg lub plab thiab lub rauv lub cev, muab zoo heev. thermal stability thiab kev tiv thaiv kev tiv thaiv.
3: Magnesia chrome cib
Magnesia chrome refractory cib feem ntau yog ua los ntawm magnesia xuab zeb thiab chrome ore, thiab muaj qhov zoo tshaj plaws kev ua haujlwm kub thiab tiv thaiv alkaline slag yaig. Nyob rau hauv blast furnaces,magnesia chrome cibfeem ntau yog siv rau hauv qhov cub hluav taws xob thiab lub caj pas, thiab tuaj yeem tiv taus qhov yaig ntawm qhov kub thiab txias slag thiab alkaline tshuaj. Nws qhov kub thiab txias zog thiab tshuaj tiv thaiv corrosion ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev tuav cov hlau molten thiab slag. Lub cib no tuav cov qauv kev ruaj ntseg hauv qhov kub thiab txias thaum muab kev hnav zoo thiab kev yaig tsis kam, ua rau nws yog ib qho tseem ceeb rau cov khoom kub kub ntawm qhov cub tawg.
4: FireClay cib
Av nplaum cib feem ntau yog siv nyob rau hauv txheej txheej thiab tsis tshua muaj kub ntawm cov blast furnaces vim lawv cov cua sov ua hauj lwm zoo thiab cov nqi-zoo. Av nplaum cib tuaj yeem muab cov thermal rwb thaiv tsev zoo ntawm qhov kub thiab txias thaum muaj qee yam kev yaig. Lawv feem ntau siv nyob rau hauv qhov kub thiab txias ntawm lub qhov cub lub cev thiab caj pas los muab kev tiv thaiv thermal yooj yim thiab kev txhawb nqa. Txawm hais tias tsis yog high-alumina bricks los yog magnesia-chrome cib nyob rau hauv cov nqe lus ntawm kub tsis kam thiab hnav tsis kam, av nplaum cib tseem yog cov ntaub ntawv refractory nyob rau hauv blast furnaces vim lawv kev lag luam thiab kev ua haujlwm yooj yim.
Lub tsho vaporization txias dej yog siv thiab lined nrog av nplaum cib los txhim kho cov cua sov thiab tsim cov txheej txheem tiv thaiv ntawm daim tawv nqaij ua hauj lwm slag, yog li ua rau nws txoj kev pab cuam lub neej; Lub txaj txaj tseem ceeb yog nqa thiab khaws cov kua tooj liab, cov txheej tsis ua haujlwm yog ua los ntawm cov av nplaum, thiab cov txheej txheem ua haujlwm yog tsim los ntawm cov khoom siv refractory xws li magnesia refractory bricks, magnesia-chrome bricks lossis chrome cib, thiab cov kev pab cuam lub neej yog feem ntau. txog 2 xyoo. Lub txaj pem hauv ntej yog ib daim duab plaub. Hauv qab ntawm lub trough yog ua nrog av nplaum rwb thaiv tsev cib thiab av nplaum cib, thiab tom qab ntawd cov txheej txheej yog rammed nrog magnesia refractory ramming khoom. Tom qab ntawd, tag nrho trough ua hauj lwm txheej yog tsim nrog magnesia chrome cib los yog chrome cib. Lub hauv paus ntawm lub txaj muaj lub neej ua haujlwm ntev, thiab hauv ob sab phlu ntawm cov kab slag ntawm phab ntsa trough yog yooj yim dua puas, thiab nws lub neej kuj yog ntau tshaj li ib nrab xyoo.
Cov ntaub ntawv refractory yuav tsum tau siv ua ke kom ua tau raws li qhov yuav tsum tau muaj ntawm qhov sib txawv ntawm lub tshuab hluav taws xob tawg, ua kom nws txoj haujlwm ruaj khov mus ntev, thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv.
