Tam sim no refractory bricks tau dav siv nyob rau hauv peb lub neej, thiab nws cov txheej txheem ntau lawm kuj cumbersome heev. Qhov tseem ceeb tshaj plaws yog tias txhua kauj ruam ntawm kev tsim khoom yog nruj heev.
Kev taw qhia txog cov txheej txheem ntawm refractory bricks: xaiv cov khoom, kub kub calcination, xaiv thiab kev faib tawm, crushing thiab sib tsoo, scientific batching, mixing, khoom ntxiab, muaj zog txwv molding, zoo li qub ziab, kub firing, kiln tshuaj xyuas thiab ntim, loading thiab tawm hauv lub Hoobkas.
Kev tsim thiab txheej txheem ntawm siab alumina refractory cib feem ntau yog nyob ntawm cov khoom ntawm cov khoom siv raw lossis cov khoom siv zoo. Muaj kwv yees li peb hom txheej txheem thev naus laus zis.
Kev tsim cov txheej txheem ntawm cov khoom siv high-alumina cib, xws li thawj, theem nrab, thiab qib siab alumina cib, thiab casting cib, thiab lwm yam, thiab cov txheej txheem (II) thiab (III) yog cov txheej txheem rau kev ua cov khoom zoo siab alumina. cov khoom. Qhov sib txawv ntawm ob txheej txheem yog tias nyob rau tom kawg, ib feem ntawm qhov chaw mos av yog ntxiv rau cov av nkos kwv yees hauv daim ntawv av nkos. Multi-clinker high-alumina khoom yog tsim los ntawm cov txheej txheem no, uas tuaj yeem txhim kho cov khoom molding ntawm cov av nkos thiab lub cev thiab cov khoom kub ntawm cov khoom.
1) Kev npaj khoom siv
Feem ntau yog kev npaj ntawm high-alumina clinker thiab kev npaj ua ke ntawm high-alumina. Thaum lub sij hawm kev npaj ntawm clinker, refractory high-alumina raw cov ntaub ntawv yog calcined nyob rau hauv high kub rau granular cov ntaub ntawv thiab hmoov zoo ntawm ntau theem, ua ke nrog rau kev npaj ntawm high-alumina, lub high-alumina yog coarsely crushed, qhuav, finely av rau hauv hmoov. thiab slurried.
2) Cov khoom xyaw, sib tov thiab molding
Siv calcined refractory high-alumina clinker raws li cov khoom siv barren, nrog rau qee qhov kev faib ua ke ntawm high-alumina, qhov sib tov yog tsim. Qhov kev faib ua feem ntawm sib xyaw clinker yog loj, uas yog hu ua multi-clinker khoom. Cov khoom siv lead ua no muaj qhov ntim siab ruaj khov thiab zoo lwm yam khoom, tab sis yuav tsum muaj zog molding. Multi-clinker bricks yog cov khoom siv dav tshaj plaws thiab siv cov khoom siv high-alumina.
Cov sib tov yog tsim tom qab kneading los yog kneading dua. Muaj ntau txoj hauv kev ntawm kev sib sau, tab sis tam sim no semi-dry pressing feem ntau yog siv rau ntau cov khoom siv clinker. Cov txheej txheem moulding thiab moulding siab muaj kev cuam tshuam rau cov kev ua kom zoo, lub zog muaj zog thiab swb ntawm lub cib.
3) Qhuav
Cov dej noo ntawm high-alumina cib blanks txawv raws li txoj kev molding. Lub semi-dry-pressed blanks muaj cov dej noo tsawg thiab yuav luag tsis muaj luv luv thaum cov dej evaporates. Lawv tuaj yeem qhuav sai sai lossis ncaj qha thauj mus rau hauv qhov cub. Cov cib uas muaj dej ntau tuaj yeem qhuav los ntawm huab cua qhuav lossis cua kub cua sov ua ntej, thiab tom qab ntawd xa mus rau lub qhov cub. Qhov tseem ceeb ntawm kev tswj cov txheej txheem ziab ziab yog qhov ziab kom qhuav, uas yuav tsum tau ua raws li lub hauv paus ntsiab lus ntawm kev ua kom cov cib tsis deformed, tawg thiab muaj zog. Tom qab tag nrho, cov dej noo ntawm cov cib nkag mus rau hauv qhov cub yuav tsum qis dua 2 feem pua.
4) Kev tua
Lub hom phiaj ntawm sintering yog sinter lub cib kom nws muaj qee lub zog ntawm qhov loj me, fineness thiab porosity, siab mechanical zog, zoo ntim stability thiab zoo hluav taws kub.
Thaum lub sij hawm sintering txheej txheem, ib tug series ntawm lub cev thiab tshuaj hloov pauv yuav tshwm sim nyob rau hauv lub matrix ib feem ntawm lub cib, uas yog, ua ke nrog siab alumina thiab clinker nplua hmoov yuav raug ntau yam kev cuam tshuam thaum lub sij hawm sintering txheej txheem. Thaum rhuab mus rau 200-900 degree, lub cib yog decomposed thiab dehydrated nrog siab alumina, lub ntim yog shortened li ntawm 2 feem pua rau 2.5 feem pua, thiab cov impurity minerals thiab lwm yam organic tshuaj kuj decomposed thiab oxidized. Thaum qhov kub siab tshaj 900 degree, cov theem ua kua thiab mullite crystallization pib tshwm sim, thiab qhov ntim txuas ntxiv mus. Tshaj 1000-1100 degree, mullite nplej loj hlob. Tom qab tua ntawm 1350-1450 degree, tag nrho cov ntim luv luv tuaj yeem ncav cuag 4 feem pua rau 5 feem pua. Txhawm rau ua kom tiav cov recrystallization thiab aggregate recrystallization ntawm mullite, qhov firing ceev yuav tsum tsis txhob ceev heev. Tom qab sintering, yuav tsum tau khaws cia kom zoo, kom cov txheej txheem sintering ntawm lub cib thiab ntau yam kev hloov ntawm lub cev thiab tshuaj yuav zoo ib yam. Thaum kawg qeeb txias tawm.
