Corundum spinelrefractory castablesmuaj cov slag kuj zoo heev, spalling kuj, tsawg melting poob, ntev kev pab cuam lub neej, muaj kev ruaj ntseg thiab lwm yam zoo, uas muaj peev xwm ua tau raws li cov txheej txheem smelting ntawm lub cub hluav taws xob puag ncig thiab square billet ntau lawm kab; nws qhov kev puas tsuaj feem ntau yog tshwm sim los ntawm cov tshuaj tiv thaiv ntawm slag thiab cov ntaub ntawv refractory, thiab thermal stress thiab mechanical stress kuj ua lub luag haujlwm tseem ceeb.
Qhov sib txawv tseem ceeb ntawm cov cam khwb cia hauv qab thiab cov cib ua hauv qab:
1) Lub sijhawm hloov pauv ntawm cov cam khwb cia hauv qab yog li 24 ~ 38h, lub sijhawm tsim kho yog 2h, lub sijhawm txij nkawm yog 16h, thiab lub sijhawm ci yog 36h; Lub sij hawm tsim kho ntawm lub cib-tsim ladle hauv qab yog 4h, thiab lub sij hawm ci yog 12 ~ 24h.
2) Kev kho hom kev kho, thaum lub pob zeb ua lub ladle yog kho, tag nrho cov ladle hauv qab ua hauj lwm hauv ob sab phlu yuav tsum tau hloov, nrog rau cov ladle hauv qab alumina-magnesia-carbon cib; thaum lub cam khwb cia lub ladle kho, tsuas yog cov cua cib, nozzles thiab tej qhov chaw yuav tsum tau hloov.
Lub corundum-spinel refractory castable tau siv rau txheej ua haujlwm ntawm 150t ladle hauv qab ntawm Baosteel lub cub hluav taws xob hluav taws xob cov kab ntau lawm (13# thiab 8# ladle), nrog dej ntxiv ntawm 5.0% ~ 5.5% ( w), tus nqi ntws ntawm 180 ~ 220mm, lub sijhawm nplawm ntawm 3 ~ 5min, thiab lub vibration pas nrig rau tso pa tawm. Lub sijhawm tsim kho tag nrho yog 1 ~ 2h.
The service life of the two casting ladle bottoms during overhaul was 92 furnaces and 91 furnaces (normal offline). There were only slight cracks on the casting ladle bottom during use. The most severely damaged area during overhaul was the impact area of the ladle bottom, but the residual thickness was >100 hli. Tag nrho cov ladle hauv qab ua hauj lwm txheej tau hloov thaum lub sij hawm nruab nrab-kho ntawm lub cib-ua ladle hauv qab. Nws tuaj yeem pom tias corundum-spinel refractory castable tuaj yeem ua tau raws li kev siv ntawm lub ladle ntawm lub cub hluav taws xob hluav taws xob cov kab ntau lawm thiab muaj kev pabcuam zoo dua.
Piv nrog rau cov cib ua hauv qab, qhov tseem ceeb ntawm lub ladle hauv qab muaj qhov zoo hauv qab no:
1) Cov pob qij txha cib ntawm cov txheej hauv qab ua haujlwm raug txo qis, uas txo qhov tshwm sim ntawm kev tawg ntawm cov hauv qab thiab txias steel seeping raws cov pob qij txha cib, thiab txhim kho kev nyab xeeb ntawm lub ladle.
2) Cov huab cua nruj thiab kev ncaj ncees ntawm cov txheej hauv qab ua haujlwm tau ntxiv dag zog, qhov tshwm sim ntawm "sab tshuab" ntawm cov cua-permeable bricks raug txo, thiab qhov tshwm sim ntawm offline vim qhov txawv txav ntawm huab cua-permeable cib raug txo, thiab kev nyab xeeb yog txhim kho.
3) Nyob rau hauv nruab nrab thiab lig theem ntawm kev siv, yuav tsis muaj qhov txawv txav ntawm cov cib vim qhov sib ntxiv ntawm cov pob zeb cib.
4) Kev tsim kho tshuab yooj yim rau kev khiav lag luam thiab txo kev siv zog.
5) Tsis tas yuav hloov tag nrho cov txheej hauv qab ua haujlwm thaum lub sijhawm kho nruab nrab, thiab hauv qab qhov cuam tshuam cheeb tsam yog khaws cia nrog cov ntaub ntawv kho, uas txo cov khoom siv refractory.
