Lub refractory cib txheej nyob rau ntawm qhov hluav taws kub-ntsej muag ntawm lub gasifier yog ib tug consumable txheej uas yog resistant rau kub, corrosion thiab yaig. High-purity chromium oxide cov ntaub ntawv feem ntau xaiv, feem ntau hu ua chrome-aluminium-zirconium cib los yog high-chrome cib. Qhov no yog ib feem ntawm cov khoom siv refractory yuav tsum muaj qhov kub thiab txias tsis kam, siab creep zog, thermal shock stability thiab zoo kub-kub tshuaj stability. Thaum siv, qhov kev puas tsuaj ntawmsiab chrome bricksRau gasifiers feem ntau yog:
1. Tshuaj yaig
High chrome cib feem ntau yog eroded los ntawm slag thaum siv, ua raws li kev yaig los ntawm kev txo cov pa roj hauv lub cub tawg. Kev yaig ntawm high-chrome cib los ntawm slag suav nrog kev tawg ntawm ZrO2, Al2O3 thiab lwm yam khoom hauv high-chrome cib rau hauv slag. Tsis tas li ntawd, SiO2 thiab CaO nyob rau hauv lub slag nkag mus rau hauv lub cib thiab reacts nrog refractory Cheebtsam los ua ib tug thicker metamorphic txheej. Kev yaig ntawm high-chrome cib los ntawm kev txo cov pa roj xws li CO thiab H2 feem ntau yog tshwm sim los ntawm cov pa roj thiab impurities hauv cov cib, xws li SiO2 thiab cov hlau uas muaj oxides, uas ua rau cov roj ntws tawm los yog hnov mob nrog CO nyob rau hauv qhov kev txiav txim. ntawm cov hlau oxides los tsim C tso rau hauv cov cib, ua rau lub siab-chrome cib kom o thiab tawg.
2. Mechanical hnav
Kev hnav khaub ncaws feem ntau yog los ntawm scouring ntawm high-chrome cib rau gasification furnaces los ntawm high-speed roj thiab cov slag nqa. Qhov tshwm sim ntawm qhov scouring no yog tias ntawm ib sab tes, nws ua kom cov tshuaj tiv thaiv kab mob ntawm cov slag thiab high-chrome cib, ntawm qhov tod tes, nws yuav tshem tawm cov khoom qis-melting-point tshuaj tiv thaiv los ntawm cov cib saum npoo, thiab ntxiv ceev. txheej txheem tev ntawm cib metamorphic txheej thiab tawg qhov chaw.
3. Cov xwm txheej ua haujlwm
Cov txheej txheem kev khiav hauj lwm ntawm lub gasifier kuj yog ib qho tseem ceeb ntawm kev puas tsuaj ntawm high chrome bricks.
a) Kev khiav hauj lwm kub: Kev xyaum tau qhia tias txhua txhua 100 degree nce hauv kev khiav hauj lwm kub ntawm lub gasifier, tus nqi yaig ntawm refractory bricks yuav nce los ntawm ze li ntawm 3-4 zaug.
b) Coal hom: Cov hmoov tshauv melting point ntawm cov thee hom txiav txim siab qhov kub thiab txias ntawm lub gasifier. Yog hais tias cov khoom siv raw cov hmoov tshauv melting point tsawg dhau, qhov viscosity ntawm cov hmoov tshauv yog me me nyob rau hauv cov xwm txheej ntau lawm, uas yuav ua rau muaj kev yaig thiab nkag mus ntawm lub ntsej muag kub ntawm cov pob zeb los ntawm cov slag; rau cov hom thee uas muaj cov hmoov tshauv siab dhau lawm, qee yam ntawm cov khoom ntxiv xws li CaO, Fe2O3, thiab lwm yam yog feem ntau qhia thaum npaj cov dej-coal slurry kom txo nws cov melting ndlwg kub mus rau qhov zoo tshaj tus nqi, tab sis nrog rau qhov nce ntawm tus nqi. ntawm CaO thiab Fe2O3 ntxiv, kev yaig ntawm siab chrome cib kuj ua rau hnyav dua.
c) Ntau lawm load thiab pib-nres lub sij hawm: Raws li kev txheeb cais, rau txhua txhua 30% nce nyob rau hauv ntau lawm load, lub neej kev pab cuam ntawm lub ntsej muag kub bricks yog txo los ntawm 33%; Feem ntau, rau txhua qhov pib-nres, lub ntsej muag kub lub ntsej muag yog eroded los ntawm 5-20mm, tshwj xeeb tshaj yog thaum cov ntsiab lus CaO hauv cov slag siab. Qhov no tshwm sim yog tshwj xeeb tshaj yog pom tseeb.
d) Burner: Kev sim tshawb fawb thiab kev ua haujlwm hauv thaj chaw tiag tiag qhia tau tias lub kaum sab xis ntawm lub tshuab hluav taws xob yuav tsum nyob ib puag ncig 35 degree. Yog tias lub kaum sab xis loj dhau lawm, nws yuav ua rau muaj scouring loj thiab tev ntawm sab saud; Yog hais tias cov tshuaj tsuag lub kaum sab xis me dhau, nws tsis tuaj yeem ua tiav gasified, ua rau txo cov roj gasification efficiency. Yog hais tias lub burner raug ntsia offset, nws yuav ua rau lub zos yaig ntawm lub qhov cub hauv ob sab phlu.
