Izitini eziphakeme ze-alumina eziphansi

Izitini eziphansi ze-alumina eziphakeme ziwuhlobo lwezitini eziphakeme ze-alumina ezingamelana nokushisa okuphezulu kuneminye imikhiqizo efanayo, ingonga ukusetshenziswa kwe-coke futhi inyuse ukuphuma kwensimbi. Ukuphinda kukhanye kwezitini eziphakeme ze-alumina kuphakeme kunezitini zobumba nezitini ezinesi-silica, kufinyelela ku-1750 ~ 1790 ℃, okungeyokusebenza okuphambili okukhanyelayo. Izitini eziphansi nezitini eziphakeme ze-alumina zisuselwa kumcabango “wamatshe amathathu”. Khetha ubumba we-bauxite noboshwe njengezinto zokusetshenziswa eziyinhloko, engeza i-kyanite efanele, i-andalusite ne-sillimanite, eyaziwa kakhulu ngokuthi “amatshe amathathu”, lawula izinkomba zomzimba nezamakhemikhali nokwakheka kwezinhlayiyana, sebenzisa i-bauxite + mullite + corundum nezinye izinto zokusetshenziswa njengohlelo lobuchwepheshe . Enqubeni yokukhiqiza, izinkomba zempahla eluhlaza zitholwa kuqala futhi zilawulwe. Ngemuva kokuchoboza, ukushaya, nokuhlola, izithako zilinganiswe ngokuya ngesilinganiso. Ngemuva kokuxuba nokugaya, ubukhulu bezinhlayiyana nomswakama wodaka kuyalawulwa ukuhlangabezana nezidingo zokubumba. Ama-abrasives afanelekile angalawula inani lokushaywa, ubukhulu kanye nokukhanyisa kokubumba, ngenkathi kuvivinywa imikhiqizo eqediwe nokusebenza kahle ukuhlangabezana nezidingo ezichaziwe. Inqubo yokukhiqiza: sebenzisa ukushisa okuphezulu okukhanyiswe nge-bauxite ephezulu, engeza okokushisa okuphezulu okunezinga eliphansi lokungena, bese uthola ukucindezelwa okuphezulu kwengcindezi nokushisa okuphezulu. Inezici zamandla aphezulu, isilinganiso esiphansi sokuhamba kanye nezinga lokushisa eliphakeme lokusebenza. Isetshenziswa kabanzi emgqonyeni wesithando somlilo nasezitinini zokuhlola izithandani ezinamazinga okushisa aphakeme kanye nasemafini okushisa okushisayo.

Izici zomkhiqizo:

1. Izinga eliphansi lokuhamba kanye nezinga lokushisa eliphakeme elincane.

2. Izinga lokushisa lokuthambisa liphezulu.

3. Good umthelela ukumelana.

4. Ukushisa okuphezulu namandla okucindezela.

5. Ukuzinza okuhle kwevolumu ekushiseni okuphezulu nokumelana nokugqoka okuhle.

6. Good ukugqwala ukumelana.

Ngenxa yokuthi imikhiqizo yezitini ezikhanyisayo ene-alumina ephezulu ine-Al2O3, ukungcola okuncane nengilazi engacoleki kangako, izinga lokushisa elinciphisa umthwalo liphezulu kunelezitini zobumba, kepha ngenxa yokuthi amakristalu e-mullite awenzi isakhiwo senethiwekhi, izinga lokushisa lokuthambisa umthwalo namanje alizona izitini ze-silica phezulu.

Izitini ezisezingeni eliphansi neziphezulu ze-alumina ziqukethe i-Al2O3 eningi, esondelene nezinto zokwakha ezingathathi hlangothi, futhi ingamelana nokuguguleka kwe-acid slag ne-alkaline slag. Njengoba ziqukethe i-SiO2, amandla okumelana ne-alkaline slag abuthakathaka kunalawo we-acid slag.

Ukusetshenziswa Komkhiqizo:

Izitini ezisezingeni eliphansi ze-alumina zenziwa nge-grade ekhethekile ye-bauxite clinker njengempahla eyinhloko eluhlaza, enezelwa izithasiselo ezikhethekile. Ngemuva kokudubula okuphezulu kwengcindezi kanye nokushisa okuphezulu, banezinzuzo zomthamo omkhulu wokugcina ukushisa kanye nezinga eliphansi lokuhamba. Zifanele amakhahle wokuqhuma amancane naphakathi. Isitofu somoya esishisayo.

Izitini eziphansi nezitini eziphakeme ze-alumina zezinkuni zokuqhumisa kanye namahhotela okushisa aqhuma asetshenziselwa iziteshi zompompi wesithando somlilo. Uhlelo olusabalekayo lwamukela uchungechunge lwe-AI2O3-SiC-C. Inezici ezinhle kakhulu zokumelana nokugqwala, ukumelana nokuguguleka kanye nokuqina okuphezulu kokushisa. Ingasetshenziswa esiteshini esiyinhloko samakhemikhali wokuqhuma. Umugqa wensimbi oshisayo, umugqa we-slag, umbhobho we-swing, ithangi lensimbi elisele, ngaphezulu kwesembozo somsele omkhulu, zombili izinhlangothi zekhava lomsele omkhulu, umsele wensimbi, umsele we-slag, njll.

Izinkomba zomzimba nezamakhemikhali: