Cov yam ntxwv ntawm cov castable tshiab rau aluminium melting rauv

(1) High-tech castables muaj xws li: tsawg cement, ultra-low cement thiab non-cement castables, uas yog cov yam ntxwv ntawm fineness (tsis muaj porosity), siab zog, tsis kub, nruab nrab kub, thiab kub lub zog, thiab lub zog raws li nram no qhov kub thiab txias. Raws li nws nce thiab nce; qhov ntim ntawm lwm cov castables yog qhov ruaj khov ntawm ntau qhov kub thiab txias.

(2) Tom qab kho qhov loj me me, particle loj faib, ncov cog thiab hom ultrafine hmoov koom nrog rau hauv lub ncuav, ntau theem “kaw ntim” txoj kev yog siv ua ke los txo cov porosity ntawm cov khoom pouring kom tsawg dua 10 %. Feem ntau hais lus, nws yog qhov nyuaj rau cov kua txhuas nkag mus rau hauv qhov pores tsawg dua 0.5μM, yog li cov cement castables tsawg yuav hloov phosphates. Tsob ntoo refractory khoom ntawm tus neeg sawv cev.

(3) Nyob rau hauv qhov no tsis tshua muaj porosity thiab me me pore dispersion, cov khoom sib xyaw ua ke uas tiv thaiv cov kua dej nkag tsis tau ntxiv rau hauv cov cement qis, uas tuaj yeem ua rau lub kaum sab xis ntawm cov kua txhuas mus rau cov khoom siv refractory, thiab txhim khu kev qha. aluminium tsis kam ntawm castable. Kev ua haujlwm ntawm cov kua dej yog qhov pom tseeb heev.

Castable rau aluminium melting rauv

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(1) Ntxiv aluminium ingots lossis cov khoom pov tseg los ntawm lub qhov rooj rau lub qhov cub rau lub qhov cub, uas yooj yim rau ntaus lub qhov rooj rauv thiab sab saum toj ntawm lub qhov cub. Nws raug nquahu kom siv lub zog siab qis-cement castables nrog kub-resistant steel fibers ntawm lub qhov rooj rauv thiab sab saum toj ntawm lub qhov rooj rauv. Nws yog cov khoom siv zoo refractory nruab nrog stainless hlau tshav kub-resistant fibers uas muaj npib tsib xee thiab chromium thiab lwm yam alloying ntsiab nyob rau hauv lub hauv paus ntawm tsawg cement castables, thiab tsim nyog explosion-proof agents thiab tshwj xeeb additives. Nws yog tus cwj pwm los ntawm lub zog siab, zoo ua haujlwm, cuam tshuam tsis kam, Kub poob siab tsis kam, shedding kuj, corrosion kuj, nkag mus rau hauv, thiab lwm yam. Cov kev ntsuam xyuas qhia tau hais tias nws lub zog ntawm 1200 ° C yog 1000-30 siab dua li cov high-alumina castables uas tsis muaj steel fiber ntau.

(2) Rau lub qhov cub sab saum toj, castable nrog zoo ntim ruaj khov thiab siab kub-kub tus qauv yuav tsum tau xaiv. Xav txog kev txuag hluav taws xob thiab kev txo qis, qhov ntom ntom ntawm cov castable yuav tsum tsawg li tsawg tau.

(3) Siv lub teeb yuag castables, lub teeb ci ci, lub teeb yuag thermal rwb thaiv tsev mortar, aluminium silicate fiber ntau thiab lwm yam khoom siv thermal rwb thaiv tsev rau tag nrho cov kiln kom txaus thermalize tag nrho cov kiln kom txo tau lub zog noj thiab ua tau raws li qhov yuav tsum tau ua.

Tam sim no, silicon nitride ua ke nrog cov ntaub ntawv silicon carbide tau siv los hloov cov pa roj carbon cib hauv cov ntaub ntawv phab ntsa ntawm aluminium electrolytic hlwb. Txawm hais tias cov silicon carbide hauv silicon nitride ua ke nrog cov khoom siv silicon carbide tuaj yeem hnov ​​​​mob nrog oxygen los tsim silicon dioxide ntawm qhov kub thiab txias, qhov ntau tsim silicon dioxide zaj duab xis nyob rau sab nraud tuaj yeem tiv thaiv kev txuas ntxiv oxidation ntawm silicon carbide cov ntaub ntawv. Tsis tas li ntawd, kev sib xyaw ntawm silicon nitride thiab silicon carbide cov ntaub ntawv yog resistant rau cryolite corrosion thiab muaj oxidation tsis kam, uas tuaj yeem ua rau kom muaj kev pab cuam lub neej ntawm txhuas electrolytic cell. Hauv qab yog ua los ntawm cov khoom qhuav impermeable, thermal rwb thaiv tsev cib thiab calcium silicate board.