Iimpawu ze-castable entsha yesithando sokunyibilikisa i-aluminium

(1) Izinto ezixhotyiswe ngetekhnoloji ephezulu zibandakanya: i-samente ephantsi, i-samente ephantsi kakhulu kunye ne-samente engekhoyo, ebonakaliswe ngokucokisekileyo (i-porosity ephantsi), amandla aphezulu, ubushushu obuphantsi, ubushushu obuphakathi, kunye namandla aphezulu obushushu, kunye namandla alandelayo. ubushushu. Njengoko inyuka kwaye isanda; umthamo wezinye izinto eziphoswayo uzinzile kakhulu kumaqondo obushushu ahlukeneyo.

(2) Emva kokulungelelanisa ubungakanani beqhekeza, ukusabalalisa ubungakanani bamasuntswana, ukutyalwa kwencopho kunye nohlobo lwepowder ye-ultrafine ethatha inxaxheba ekuthululeni, i-multi-level “close packing” indlela isetyenziselwa kunye ukunciphisa i-porosity yezinto zokuthululela ngaphantsi kwe-10. I-%, kunye nokusabalalisa i-pore efanayo kwimveliso enqunyiweyo kuphela yi-0.5PμM, ngelixa i-asidi ye-phosphoric yendabuko okanye i-aluminium phosphate njenge-binder, i-pores ye-uniform ye-refractory materials yi-22μM; ukuthetha ngokubanzi, kunzima ulwelo aluminiyam ukugqobhoza pores ngaphantsi kwe 0.5μM, ngoko ephantsi castables zesamente ziya endaweni phosphates. Izinto eziqhelekileyo ezichasayo ze-arhente.

(3) Kolu hlobo lwe-porosity ephantsi kunye ne-pore encinci ye-pore dispersion, isongezo esidibeneyo esichasayo ukungena kwe-aluminiyam yolwelo asikongezwa kwinaliti ephantsi yesamente, enokunyusa i-angle yokufuma yolwelo lwe-aluminium kwizinto eziphikisayo, kunye nokuphucula ukumelana ne-aluminium ye-castable. Umsebenzi wokufunxa ulwelo ucace kakhulu.

Inokusetyenziselwa iziko lokunyibilikisa ialuminiyam

Ulwakhiwo

(1) Yongeza ii-ingots ze-aluminium okanye izinto ezilahlwayo ezivela kumnyango wesithando somlilo, ekulula ukubetha umnyango wesithando somlilo kunye nomphezulu womnyango wesithando somlilo. Kunconywa ukusebenzisa i-high-high-low-cement castables kunye neentambo zetsimbi ezixhathisa ukushisa kumnyango wesithando somlilo kunye nomphezulu womnyango wesithando somlilo. Yimathiriyeli yomgangatho ophezulu we-refractory exhotyiswe ngentsimbi yensimbi enganyangekiyo yokushisa equkethe i-nickel kunye ne-chromium kunye nezinye izinto ezixutywayo kwisiseko sezinto ezisezantsi zesamente, kunye nezixhobo ezifanelekileyo zokuqhuma kunye nezongezo ezikhethekileyo. Ibonakaliswe ngamandla aphezulu, ukuchasana okulungileyo, ukuchasana kwempembelelo, ukuxhathisa ukutshatyalaliswa kobushushu, ukuchasana nokuchithwa, ukuxhatshazwa kwe-corrosion, ukumelana nokungena, njl. Isebenza xa isetyenziswe kwindawo engaphantsi kwe-1200 ° C. Uvavanyo lubonisa ukuba amandla ayo kwi-1000 ° C yi-30-60 ephezulu kuneyesiqhelo esiphakamileyo se-alumina castables ngaphandle kwefiber yensimbi.

(2) Kwi-furnace top, i-castable ene-volume stability elungileyo kunye nomgangatho ophezulu wokushisa okwakhiwa kwamandla kufuneka kukhethwe. Ukuqwalasela ukugcinwa kwamandla kunye nokunciphisa ukusetyenziswa, ubuninzi bobuninzi be-castable kufuneka bube buncinci kangangoko.

(3) Sebenzisa ii-castables ezilula, izitena ezikhaphukhaphu, udaka lwe-thermal insulation lightweight, iimveliso ze-aluminium silicate fiber kunye nezinye izinto ezilula zokugquma i-thermal kwi-kiln yonke ngokwaneleyo ukutshisa ngokwaneleyo i-oven ukuze kuncitshiswe ukusetyenziswa kwamandla kunye nokuhlangabezana neemfuno.

Okwangoku, i-silicon nitride edityaniswe ne-silicon carbide isetyenziselwe ukubuyisela izitena zekhabhoni kwicala lezinto ezisecaleni zodonga lweeseli ze-aluminium electrolytic. Nangona i-silicon carbide kwi-silicon nitride idityaniswe ne-silicon carbide material inokusabela nge-oksijini ukuvelisa i-silicon dioxide kumaqondo obushushu aphezulu, ifilimu eyenziwe ngakumbi yesilicon dioxide ngaphandle inokuthintela ukuqhubeka kwe-oxidation yezinto ze-silicon carbide. Ngaphezu koko, indibaniselwano ye-silicon nitride kunye ne-silicon carbide imathiriyeli iyaxhathisa kwi-cryolite corrosion kwaye inokumelana ne-oxidation elungileyo, enokunyusa kakhulu ubomi benkonzo yeseli ye-aluminium electrolytic. Umzantsi wenziwa ngezinto ezomileyo ezingenamanzi, izitena zokufakelwa kwe-thermal kunye nebhodi ye-calcium silicate.