Lub tshuab hluav taws xob lub tshuab hluav taws xob muaj kev ua haujlwm hnyav: siab tapping kub (1640-1690 degree), ntau npaum li 1,000 qib steel, ntau yam slag alkalinity (n(CaO)/n(SiO₂){{ 3} }. , magnesia-carbon bricks thiab lwm yam carbon-muaj xovxwm cib. Txawm li cas los xij, raws li qhov yuav tsum tau ua ntawm cov hlau tsis tshua muaj carbon steel thiab cov hlau zoo smelting, qhov kev faib ua feem ntawm refining sab nraum molten steel rauv nce, thiab lub sij hawm smelting yuav ntev dua, uas ua rau kom qhov kub ntawm cov hlau molten. thiab lub sijhawm nyob ntev dua hauv lub ladle. Qhov no yuav tsum tau cov ntaub ntawv refractory rau ladle Siab dua thiab siab dua.
Corundum-spinel castables yog dav siv nyob rau hauv cov txheej txheem ua hauj lwm hauv qab lub converter ladle slag kab vim nws zoo alkali slag corrosion kuj thiab zoo heev kub-kub txhua yam khoom. Lub pre-synthesized los yog nyob rau hauv-situ generated magnesia-aluminium spinel yog nkag mus rau hauv corundum castable, feem ntau yog los txhim kho lub slag kuj thiab txhim kho cov high-temperature mechanical zog. Lub pre-synthesized magnesium-aluminium spinel muaj cov qoob loj loj, zoo tshuaj stability thiab tsis muaj solubility, nrog rau zoo heev ntim stability. Nws yog qhov tshwj xeeb tshaj yog siv rau hauv qab ntawm qhov kub thiab txias thiab kub siab ladle. Vim li no, Baosteel Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob Steel Plant txiav txim siab sim corundum-spinel castables es tsis txhob siv cov txhuas-magnesium-carbon bricks rau hauv qab ua hauj lwm txheej ntawm lub ladle ntawm round billet ntau lawm kab.
Kev sib piv ntawm corundum spinel castable thiab magnesia-aluminium-carbon cib
Piv nrog Maglesia-Aluminium Carbon Ciaj xim, Corundel castables tsis muaj cov carbon, thiab muaj ntau dua compressive zog thiab kev kub siab comp compression lub zog ntawm chav tsev kub. Lawv nthuav me ntsis tom qab tua hluav taws thiab pom zoo ntim stability. Inferred los ntawm cov ntsuas kev ua tau zoo, corundum-spinel castable tuaj yeem ua tau raws li cov txheej txheem smelting uas yuav tsum tau ua ntawm lub tshuab hluav taws xob hluav taws xob puag ncig billet ntau lawm kab.
Kev tshuaj xyuas ntawm corundum spinel castable
2.1 Kev sib piv ntawm corundum-spinel castable thiab magnesia-aluminium-carbon cib
Qhov sib txawv ntawm qhov sib txawv ntawm qhov dej hauv qab thiab cib ladle hauv qab: 1) Lub sij hawm tig rov qab ntawm lub lauj kaub hauv qab yog li 24 ~ 38h, lub sijhawm siv yog 2h, lub sijhawm kho yog 16h, lub sijhawm ci yog 36h; cib ladle hauv qab siv lub sij hawm yog 4h, ci lub sij hawm 12-24h. 2) Kev kho hom yog kho. Thaum kho lub cib ladle, tag nrho cov hauv qab ua haujlwm linings, nrog rau cov txhuas-magnesia-carbon bricks nyob rau hauv qab ntawm lub ladle, yuav tsum tau hloov; Thaum lub pouring ladle yog kho, tsuas yog lub qhov cua cib, nozzles thiab tej qhov chaw yuav tsum tau hloov.
Cov corundum-spinel castable yog siv rau hauv qab ua hauj lwm txheej ntawm 150t ladle (13# thiab 8# ladle) ntawm Baosteel lub cub hluav taws xob puag ncig billet ntau lawm kab, nrog 5.0 feem pua -5.5 feem pua dej (w), ntws tus nqi 180-220mm, nplawm Lub sij hawm yog 3-5min, lub tso pa yog vibrating los ntawm vibrating pas nrig, thiab tag nrho lub sij hawm tsim yog 1-2h.
The service life of the two pouring ladle bottoms during the overhaul was 92 furnaces and 91 furnaces (normally offline). The residual thickness of each area during the overhaul of the pouring ladle and the brick ladle is shown in Table 2. There are only minor cracks in the bottom of the cast ladle when it is used. The most severely damaged area is in the impact area of the bottom of the ladle when it is overhauled, but the residual thickness is >100 hli. Thaum lub cib hauv qab tau kho, tag nrho cov txheej hauv qab ua haujlwm yuav raug hloov. Nws tuaj yeem pom tias corundum-spinel castable tuaj yeem ua tau raws li kev ua haujlwm ntawm lub tshuab hluav taws xob hluav taws xob puag ncig billet ntau lawm kab ladle, thiab muaj kev pabcuam zoo dua.
Piv nrog rau cov cib hauv qab ntawm lub ladle, kev siv ib qho kev sib tw hauv qab ntawm lub ladle muaj qhov zoo hauv qab no: 1) Tus naj npawb ntawm cov pob qij txha cib hauv cov txheej txheem ua haujlwm hauv qab ntawm lub ladle yog txo, qhov tshwm sim ntawm kev tawg. hauv qab ntawm lub ladle thiab kev nkag mus ntawm cov hlau txias raws li cov pob qij txha cib yog txo, thiab kev nyab xeeb ntawm kev siv lub ladle yog txhim kho. 2) Ua kom muaj zog ntawm huab cua nruj thiab kev ncaj ncees ntawm cov txheej hauv qab ua haujlwm ntawm lub hnab, txo qhov tshwm sim ntawm "sab tshuab" ntawm lub qhov cua cib, txo qhov tshwm sim ntawm offline vim qhov txawv txav ntawm lub cib, thiab txhim kho kev nyab xeeb. 3) Nyob rau hauv nruab nrab thiab lig theem ntawm kev siv, yuav tsis muaj qhov txawv txav ntawm lub cib lub cev vim qhov kev loj hlob zuj zus ntawm cov pob qij txha cib. 4) Kev tsim kho tshuab yog yooj yim rau kev khiav lag luam thiab txo kev siv zog. 5) Nws tsis tsim nyog los hloov tag nrho cov txheej txheem ua haujlwm hauv qab ntawm lub pob hauv nruab nrab kho, thiab qhov cuam tshuam ntawm qhov hauv qab ntawm lub pob yog khaws cia nrog cov khoom siv kho, thiab kev noj cov khoom siv refractory yog txo. .
