Izici ze-castable entsha yesithando somlilo se-aluminium

(1) Ama-castable asezingeni eliphezulu ahlanganisa: usimende ophansi, usimende ophansi kakhulu kanye nezinsimbi zokusansimbi ezingenasimende, ezibonakala ngokucoleka (i-porosity ephansi), amandla aphezulu, izinga lokushisa eliphansi, izinga lokushisa eliphakathi, namandla okushisa aphezulu, namandla alandelayo. izinga lokushisa. Njengoba ikhuphuka futhi ikhula; umthamo wamanye ama-castable uzinzile kakhulu emazingeni okushisa ahlukahlukene.

(2) Ngemva kokulungisa usayizi wezinhlayiyana, ukusatshalaliswa kosayizi wezinhlayiyana, ukutshala okuphezulu kanye nohlobo lwempushana ye-ultrafine ebambe iqhaza ekuthululeni, indlela ye-“close packing” yamazinga amaningi isetshenziswa ndawonye ukuze kuncishiswe i-porosity yezinto ezithululwayo zibe ngaphansi kwe-10. %, kanye nokusatshalaliswa kwe-pore okufanayo komkhiqizo osikiwe kungu-0.5PμM kuphela, kuyilapho i-phosphoric acid yendabuko noma i-aluminium phosphate njenge-binder, ama-pores afanayo wezinto eziphikisayo angama-22μM; ngokuvamile, kunzima ukuthi uketshezi lwe-aluminium lungene ezimbotsheni ezingaphansi kuka-0.5μM, ngakho-ke izinsimbi eziphansi zikasimende zizothatha indawo ye-phosphates. Izinto zendabuko eziphikisayo ze-ejenti.

(3) Kulolu hlobo lwe-porosity ephansi kanye nokuhlakazeka kwembobo emincane emincane, isithako esiyinhlanganisela esimelana nokungena koketshezi lwe-aluminium asingezwa emjovweni ophansi kasimende, ongakhuphula i-angle yomswakama we-aluminium liquid ku-refractory material, futhi ithuthukise ukumelana kwe-aluminium kwe-castable. Umsebenzi wokucwiliswa kwamanzi usobala kakhulu.

Ingasetshenziselwa isithando somlilo esincibilikisa i-aluminium

Ukwakheka

(1) Engeza ama-ingots e-aluminium noma imfucumfucu esuka emnyango wesithando somlilo, okulula ukushaya umnyango wesithando somlilo nangaphezulu komnyango wesithando somlilo. Kunconywa ukusebenzisa ama-castables aphansi-samente aphansi anemicu yensimbi engamelana nokushisa emnyango wesithando somlilo nangaphezulu komnyango wesithando somlilo. Kuyimpahla ephikisayo yekhwalithi ephezulu efakwe imicu yensimbi engagqwali ekwazi ukumelana nokushisa equkethe i-nickel ne-chromium nezinye izakhi ze-alloying ngesisekelo sezinsalela zikasimende eziphansi, nama-ejenti afanele ukuqhuma nezithasiselo ezikhethekile. Ibonakala ngamandla amakhulu, ukumelana okuhle, ukumelana nomthelela, Ukumelana nokushaqeka kokushisa, ukumelana nokuchithwa, ukumelana nokugqwala, ukumelana nokungena, njll. Isebenza uma isetshenziswa endaweni engaphansi kuka-1200 ° C. Ukuhlola kubonisa ukuthi amandla ayo ku-1000 ° C angu-30-60 aphezulu kunalawo ajwayelekile afakwa nge-aluminium ephezulu ngaphandle kwe-fiber yensimbi.

(2) Kuphezulu kwesithando somlilo, i-castable enokuqina kwevolumu enhle namandla esakhiwo esisezingeni eliphezulu lokushisa kufanele kukhethwe. Uma kucatshangelwa ukonga amandla kanye nokwehliswa kokusetshenziswa, ukuminyana kwenqwaba ye-castable kufanele kube kuncane ngangokunokwenzeka.

(3) Sebenzisa ama-castables angasindi, izitini ezingasindi, udaka olushisayo olungasindi, imikhiqizo ye-aluminium silicate fiber nezinye izinto zokufaka ezishisayo ezingasindi kulo lonke ihhavini ukuze kushise ngokwanele lonke ihhavini ukuze kuncishiswe ukusetshenziswa kwamandla kanye nokuhlangabezana nezidingo.

Njengamanje, i-silicon nitride ehlanganiswe nezinto ze-silicon carbide isetshenziselwe ukufaka izitini zekhabhoni odongeni oluseceleni lwamaseli e-aluminium electrolytic. Nakuba i-silicon carbide ku-silicon nitride ehlanganiswe ne-silicon carbide material ingasabela ngomoya-mpilo ukuze ikhiqize i-silicon dioxide emazingeni okushisa aphezulu, ifilimu eyakhiwe kakhulu ye-silicon dioxide ngaphandle ingavimbela ukuqhubeka kwe-oxidation yezinto ze-silicon carbide. Ngaphezu kwalokho, inhlanganisela yezinto ze-silicon nitride kanye ne-silicon carbide imelana nokugqwala kwe-cryolite futhi inokumelana okuhle ne-oxidation, okungakhuphula kakhulu impilo yesevisi yeseli ye-aluminium electrolytic. Iphansi lenziwe ngezinto ezomile ezingenamanzi, izitini zokushisa ezishisayo kanye nebhodi le-calcium silicate.