I-Magnesia Chrome Brick

Izitini ze-chrome zeMagnesia zisetshenziswa kakhulu embonini nasekwakhiweni ngenxa yezakhiwo zazo ezisezingeni eliphakeme njengokumelana nokushisa nokucindezela kwengcindezi. Kunezinhlobo ezahlukahlukene zezitini zemagnesia chrome. Ngokuya ngezidingo zemikhiqizo ehlukene, kunezinhlobo ezintathu zezitini zemagnesia chrome. uhlobo:

1. Izitini ze-magnesia ze-chired ezixoshiwe: izitini ze-magnesia chrome ezithunjiwe zenziwe ngezithako ezinhle zekhwalithi ephezulu ye-magnesia ne-chrome ore. Okuqukethwe kwe-Cr2O3 kulungiswa ngokuya ngezidingo ezahlukahlukene. Umkhiqizo unokuzinza okuhle kokushisa nokushisa okuphezulu. Isetshenziswa kabanzi kuma-kilns kasimende nensimbi engeyona eyensimbi. Isithando somlilo nokunye.

2. Izitini ezihlanganiswe ngqo ze-magnesia-chrome: Izitini ezihlanganiswe ngqo ze-magnesia-chrome zisebenzisa i-chre ore engcolile kanye nekhwalithi ephezulu ye-high-purity magnesia njengezinto zokusetshenziswa, ngemuva kokubumba kwengcindezi enkulu, nokudubula okushisa okuphezulu endaweni eshisa ngaphezu kuka-1 700 ℃. Ukusebenza okuhle kokushisa okuphezulu, ukumelana okuqinile nokuguguleka kwe-slag. Ukumelana nokuguguleka kwesamente kakhonksi. Isetshenziswa kabanzi kumafutha we-metallurgic non-ferrous nakuma-kilns rotary kilns.

3. Izitini ze-magnesia chrome ezihlanganiswe kabusha kanye nezitini ze-magnesia chrome ezihlanganiswe kabusha: izitini ze-magnesia chrome eziphindwe kabusha nezitini ze-magnesia chrome, zisebenzisa ingxenye noma sonke isihlabathi esifakiwe (isihlabathi esihlanganisiwe) njengezinto zokusetshenziswa, izithako ezinhle, ukubunjwa kwengcindezi enkulu, i-Ultra Ukubalwa kokushisa okuphezulu, ukubopha izinhlayiya ezinhle, amandla aphezulu womkhiqizo, ukuzinza kwevolumu okuhle, okusetshenziswa kakhulu ku-RH, VOD, AOD nakwamanye amadivayisi wokucwenga angaphandle, amakhekhe okusansimbi angenayo insimbi, njll.

4. Izitini ze-chrome zeMagnesia ziyimikhiqizo ekhanyisayo ene-alkaline equkethe u-55% kuya ku-80% MgO no-8% kuya ku-20% we-Cr2O3, owenziwe nge-periclase, i-spinel eyinhlanganisela kanye nenani elincane lesigaba se-silicate. I-spinel eyinhlanganisela ifaka phakathi izixazululo eziqinile zeMgAl2O4, MgFe2O4, MgCr2O4 kanye neFeAl2O4.

Izitini ze-chrome zeMagnesia zithuthuke ngokushesha ngemuva kweminyaka yama-1960 ngenxa yokwanda kokuhlanzeka kwempahla eluhlaza nokushisa kokudubula. Njengamanje, izitini ze-chrome zemagnesia zingahlukaniswa zibe izitini ezijwayelekile, izitini eziboshwe ngqo, izitini ezihlanganisiwe, izitini ezihlanganisiwe nezitini zeCast, njll.

(1) I-magnesia ejwayelekile ye-chrome isitini: Lo ngumkhiqizo wendabuko, usebenzisa i-chrome ore njengezinhlayiya ezigqamile nemagnesia njengempuphu ecolekileyo. Noma lezi zinto ezimbili zakhiwa izinhlayiya ezibanjiwe, futhi izinga lokushisa lokudubula ngokuvamile li-1550 ~ 1600 ° C. Ukwakheka okuncane kwalesi sitini kukhombisa ukuthi kuncane kakhulu ukubopha okuqondile phakathi kwezinhlayiya ze-chromite ne-periclase, ikakhulu i-silicate (CMS) cementation noma i-fissure isolation; kunezigaba ezimbalwa zokuchithwa kwe-periclase, futhi kukhona ukuxhumana okuncane okuqondile kwi-matrix. Ngokuhlanganiswa, lesi sitini sinezinto ezimbi zomshini nokungahambi kahle kwe-slag corrosion.

(2) Izitini eziboshwe ngqo zemagnesia-chrome: Izitini eziboshwe ngqo zemagnesia-chrome zakhiwa ngesisekelo sezitini ezijwayelekile zemagnesia-chrome. Kunezici ezimbili zokukhiqiza eziyinhloko. Enye ukusetshenziswa kwezinto ezihlanzekile, kanti enye ukusetshenziswa kokudubula okuphezulu. izinga lokushisa. Okubizwa ngokuthi ukubopha okuqondile kusho ukuthi kunokuxhumana okuqondile phakathi kwezinhlayiya ze-chrome esitini kanye ne-periclase, ngoba impahla eluhlaza iqukethe i-SiO2 encane (elawulwa ngaphansi kwe-1% kuya ku-25%), futhi inani le-silicate elikhiqizwe lincane . Indlela yokudubula ikhama i-silicate emakhoneni ezinhlayiya eziqinile. Ngaleyo ndlela kuthuthukiswa ukubopha okuqondile kwesigaba esiqinile.

Izitini eziboshwe ngqo ze-magnesia-chrome zinezinga eliphakeme lokubopha ngqo, ukuze izitini zibe namandla aphezulu okushisa, ukumelana ne-slag, ukumelana nokugqwala, ukumelana nokuguguleka, ukumelana nokugqwala, ukuzinza kokushaqeka okushisayo nokuqina kwevolumu ku-1800 ° C.

(3) Isitini se-magnesia-chrome esenziwe ngokubambisana: Inqubo yokukhiqizwa kwalo mkhiqizo ibonakala ngokushisa okukhulu kwesithando somlilo se-magnesia ne-chromium ore powder omuhle ngesilinganiso esithile ukufeza ukukhiqizwa kwe-spinel yesibili ne-magnesia-chrome i-ore Solid-phase reaction ngenhloso yokubopha ngqo ukulungisa okokusebenza okujwayelekile oku-sintered, okusetshenziselwa ukukhiqiza imikhiqizo edutshuliwe noma imikhiqizo eboshwe ngamakhemikhali.

Ukufana okuqondile nokwakhiwa kwe-microstructure kwezitini ezihlanganisiwe ze-magnesia-chrome zingcono kunezitini ezixhumene ngqo. Inani lesigaba se-periclase desolubilization kanye ne-spinner yesibili ye-intergranular ngaphezulu. Izitini ezi-co-sintered magnesia-chrome zinochungechunge lwezinto eziqonde ngqo ezihlanganiswe nokusebenza kangcono kwezitini, idume kakhulu ngamandla ayo okushisa aphakeme, ukumelana namazinga okushisa okusheshayo nokumelana ne-slag. Izitini ezijwayelekile ezikhonjwe nazo zingahlukaniswa zibe izinhlobo ezimbili, eyodwa isitini esivamile sintered, lonke uchungechunge lwezinto ezijwayelekile ezi-sintered zezinhlayiya kanye ne-powder enhle, noma ngabe idutshuliwe noma ihlanganiswe ngamakhemikhali, isakhiwo sayo esincane sifana ngokuyisisekelo; owesibili uvame ngokwengxenye Ngezitini ezakhiwe ngosinki, kukhona ingxenye yezithako, njengezinto ezijwayelekile zokuhluza izinhlayiya ezimahhadlahhadla, kanti ingxenye eyimpuphu ecolekileyo ingaxubaniswa nezitini ngokulingana okuthile ne-chrome ore enhle nephepha le-magnesia , ukuze imikhiqizo edutshuliwe nehlanganiswe ngamakhemikhali ibe microscopic Isakhiwo sihlukile.

(4) Ukuhlanganiswa kabusha kwezitini ze-magnesia-chromium: i-magnesia-chromium powder exutshiwe incibilikiswa indlela yokuncibilika kagesi, futhi ukuncibilika kufakwe isikwele ukuze kwakhiwe isakhiwo esincane se-microstructure, ne-magnesia-chromium spinel namakhristali ahlangene e-periclase njengokwakheka okuyisigaba esiyinhloko Izinto ezihlanganisiwe ze-magnesia-chromium zichotshozwa zibe ngusayizi othile wezinhlayiyana, zixutshwe futhi zibunjwe, bese zidutshulwa ukulungiselela izitini ezihlanganisiwe, noma zisetshenziswe ngqo njengezitini ezihlanganisiwe zamakhemikhali.

Ukwakheka kwesitina okuhlanganisiwe kubonakala ngezinga eliphakeme lokuxhuma okuqondile kanye nenani elikhulu lesigaba se-spinel desolvent: i-crystal eyisisekelo equkethe inani elikhulu lesigaba sokuqothula empeleni iguqula izakhiwo zomzimba nezamakhemikhali ze-periclase, njengokunciphisa ukwanda okushisayo Coefficient. , Thuthukisa ukumelana nokushaqeka okushisayo, ukuthuthukisa ukumelana nokuguguleka kwe-acid-alkaline slag. Izitini ezihlanganisiwe zinezici ezifanayo kulezo zezitini ezihlanganisiwe, kepha zinokumelana okungcono ekushintsheni kokushisa okusheshayo kanye ne-microstructure efanayo kakhulu kunezitini ezihlanganisiwe.

Ihlanganiswe nesitina se-magnesia chrome, iyi-matrix enamagrafu amahle nokusatshalaliswa kwepore efanayo kanye nama-microcracks, futhi ukuzwela kwayo ekushintsheni okungazelelwe kokushisa kungcono kunokuncibilika nokuphonsa. Ukusebenza okuphezulu kokushisa komkhiqizo kuphakathi kwezitini ezihlanganisiwe nezitini ezixhumene ngqo.

(5) Izitini ezihlanganisiwe ze-magnesia chrome: Beka ingxube ye-magnesia ne-chre ore esithandweni sikagesi se-arc ukuze zincibilike ngokuphelele, bese uthela lokho kuncibilika kwesikhunta sokuphonsa. Ngesikhathi senqubo yokuqinisa, kwakhiwa izigaba ze-periclase ezinamathele kanye ne-spinel crystal, futhi kwakhiwa isakhiwo esihle se-crystal ngasikhathi sinye, ngakho-ke isitini se-magnesia chrome sinamandla amakhulu okushisa aphezulu kanye nokumelana nokugqwala kwe-slag.

Izitini ze-Magnesium chrome zisetshenziswa kakhulu embonini ye-metallurgical, njengokwakhiwa kwamathoshi wesithando somlilo ovulekile, izithando zomlilo kagesi, iziko lokucwenga ngaphandle kwesithando kanye nezinye izikhungo ezingancibilikisi zokuncibilikisa insimbi. Ingxenye yokushisa okuphezulu yodonga lwesithando samandla kagesi esisezingeni eliphezulu yenziwa ngezitini ezihlanganisiwe ze-magnesia-chrome, indawo yokuguguleka okukhulu kwesithando somlilo esingaphandle kwesithando yenziwe ngezinto zokwenziwa, kanti phezulu Indawo enesisekelo sesithando sokuncibilikisa insimbi esenziwe ngensimbi yenziwa ngezitini ezihlanganisiwe ze-magnesia-chrome nezinto zokwenziwa. Yenziwe ngezitini zemagnesia chrome. Ngaphezu kwalokho, izitini zemagnesia-chrome nazo ziyasetshenziswa endaweni evuthayo yamakhemikhali ajikelezayo kasimende kanye nama-regenerors e-glass kilns.

Inkomba yezobuchwepheshe:

I-Magnesia Chrome Brick

Izitini ze-chrome zeMagnesia zisetshenziswa kakhulu embonini nasekwakhiweni ngenxa yezakhiwo zazo ezisezingeni eliphakeme njengokumelana nokushisa nokucindezela kwengcindezi. Kunezinhlobo ezahlukahlukene zezitini zemagnesia chrome. Ngokuya ngezidingo zemikhiqizo ehlukene, kunezinhlobo ezintathu zezitini zemagnesia chrome. uhlobo:

1. Izitini ze-magnesia ze-chired ezixoshiwe: izitini ze-magnesia chrome ezithunjiwe zenziwe ngezithako ezinhle zekhwalithi ephezulu ye-magnesia ne-chrome ore. Okuqukethwe kwe-Cr2O3 kulungiswa ngokuya ngezidingo ezahlukahlukene. Umkhiqizo unokuzinza okuhle kokushisa nokushisa okuphezulu. Isetshenziswa kabanzi kuma-kilns kasimende nensimbi engeyona eyensimbi. Isithando somlilo nokunye.

2. Izitini ezihlanganiswe ngqo ze-magnesia-chrome: Izitini ezihlanganiswe ngqo ze-magnesia-chrome zisebenzisa i-chre ore engcolile kanye nekhwalithi ephezulu ye-high-purity magnesia njengezinto zokusetshenziswa, ngemuva kokubumba kwengcindezi enkulu, nokudubula okushisa okuphezulu endaweni eshisa ngaphezu kuka-1 700 ℃. Ukusebenza okuhle kokushisa okuphezulu, ukumelana okuqinile nokuguguleka kwe-slag. Ukumelana nokuguguleka kwesamente kakhonksi. Isetshenziswa kabanzi kumafutha we-metallurgic non-ferrous nakuma-kilns rotary kilns.

3. Izitini ze-magnesia chrome ezihlanganiswe kabusha kanye nezitini ze-magnesia chrome ezihlanganiswe kabusha: izitini ze-magnesia chrome eziphindwe kabusha nezitini ze-magnesia chrome, zisebenzisa ingxenye noma sonke isihlabathi esifakiwe (isihlabathi esihlanganisiwe) njengezinto zokusetshenziswa, izithako ezinhle, ukubunjwa kwengcindezi enkulu, i-Ultra Ukubalwa kokushisa okuphezulu, ukubopha izinhlayiya ezinhle, amandla aphezulu womkhiqizo, ukuzinza kwevolumu okuhle, okusetshenziswa kakhulu ku-RH, VOD, AOD nakwamanye amadivayisi wokucwenga angaphandle, amakhekhe okusansimbi angenayo insimbi, njll.

4. Izitini ze-chrome zeMagnesia ziyimikhiqizo ekhanyisayo ene-alkaline equkethe u-55% kuya ku-80% MgO no-8% kuya ku-20% we-Cr2O3, owenziwe nge-periclase, i-spinel eyinhlanganisela kanye nenani elincane lesigaba se-silicate. I-spinel eyinhlanganisela ifaka phakathi izixazululo eziqinile zeMgAl2O4, MgFe2O4, MgCr2O4 kanye neFeAl2O4.

Izitini ze-chrome zeMagnesia zithuthuke ngokushesha ngemuva kweminyaka yama-1960 ngenxa yokwanda kokuhlanzeka kwempahla eluhlaza nokushisa kokudubula. Njengamanje, izitini ze-chrome zemagnesia zingahlukaniswa zibe izitini ezijwayelekile, izitini eziboshwe ngqo, izitini ezihlanganisiwe, izitini ezihlanganisiwe nezitini zeCast, njll.

(1) I-magnesia ejwayelekile ye-chrome isitini: Lo ngumkhiqizo wendabuko, usebenzisa i-chrome ore njengezinhlayiya ezigqamile nemagnesia njengempuphu ecolekileyo. Noma lezi zinto ezimbili zakhiwa izinhlayiya ezibanjiwe, futhi izinga lokushisa lokudubula ngokuvamile li-1550 ~ 1600 ° C. Ukwakheka okuncane kwalesi sitini kukhombisa ukuthi kuncane kakhulu ukubopha okuqondile phakathi kwezinhlayiya ze-chromite ne-periclase, ikakhulu i-silicate (CMS) cementation noma i-fissure isolation; kunezigaba ezimbalwa zokuchithwa kwe-periclase, futhi kukhona ukuxhumana okuncane okuqondile kwi-matrix. Ngokuhlanganiswa, lesi sitini sinezinto ezimbi zomshini nokungahambi kahle kwe-slag corrosion.

(2) Izitini eziboshwe ngqo zemagnesia-chrome: Izitini eziboshwe ngqo zemagnesia-chrome zakhiwa ngesisekelo sezitini ezijwayelekile zemagnesia-chrome. Kunezici ezimbili zokukhiqiza eziyinhloko. Enye ukusetshenziswa kwezinto ezihlanzekile, kanti enye ukusetshenziswa kokudubula okuphezulu. izinga lokushisa. Okubizwa ngokuthi ukubopha okuqondile kusho ukuthi kunokuxhumana okuqondile phakathi kwezinhlayiya ze-chrome esitini kanye ne-periclase, ngoba impahla eluhlaza iqukethe i-SiO2 encane (elawulwa ngaphansi kwe-1% kuya ku-25%), futhi inani le-silicate elikhiqizwe lincane . Indlela yokudubula ikhama i-silicate emakhoneni ezinhlayiya eziqinile. Ngaleyo ndlela kuthuthukiswa ukubopha okuqondile kwesigaba esiqinile.

Izitini eziboshwe ngqo ze-magnesia-chrome zinezinga eliphakeme lokubopha ngqo, ukuze izitini zibe namandla aphezulu okushisa, ukumelana ne-slag, ukumelana nokugqwala, ukumelana nokuguguleka, ukumelana nokugqwala, ukuzinza kokushaqeka okushisayo nokuqina kwevolumu ku-1800 ° C.

(3) Isitini se-magnesia-chrome esenziwe ngokubambisana: Inqubo yokukhiqizwa kwalo mkhiqizo ibonakala ngokushisa okukhulu kwesithando somlilo se-magnesia ne-chromium ore powder omuhle ngesilinganiso esithile ukufeza ukukhiqizwa kwe-spinel yesibili ne-magnesia-chrome i-ore Solid-phase reaction ngenhloso yokubopha ngqo ukulungisa okokusebenza okujwayelekile oku-sintered, okusetshenziselwa ukukhiqiza imikhiqizo edutshuliwe noma imikhiqizo eboshwe ngamakhemikhali.

Ukufana okuqondile nokwakhiwa kwe-microstructure kwezitini ezihlanganisiwe ze-magnesia-chrome zingcono kunezitini ezixhumene ngqo. Inani lesigaba se-periclase desolubilization kanye ne-spinner yesibili ye-intergranular ngaphezulu. Izitini ezi-co-sintered magnesia-chrome zinochungechunge lwezinto eziqonde ngqo ezihlanganiswe nokusebenza kangcono kwezitini, idume kakhulu ngamandla ayo okushisa aphakeme, ukumelana namazinga okushisa okusheshayo nokumelana ne-slag. Izitini ezijwayelekile ezikhonjwe nazo zingahlukaniswa zibe izinhlobo ezimbili, eyodwa isitini esivamile sintered, lonke uchungechunge lwezinto ezijwayelekile ezi-sintered zezinhlayiya kanye ne-powder enhle, noma ngabe idutshuliwe noma ihlanganiswe ngamakhemikhali, isakhiwo sayo esincane sifana ngokuyisisekelo; owesibili uvame ngokwengxenye Ngezitini ezakhiwe ngosinki, kukhona ingxenye yezithako, njengezinto ezijwayelekile zokuhluza izinhlayiya ezimahhadlahhadla, kanti ingxenye eyimpuphu ecolekileyo ingaxubaniswa nezitini ngokulingana okuthile ne-chrome ore enhle nephepha le-magnesia , ukuze imikhiqizo edutshuliwe nehlanganiswe ngamakhemikhali ibe microscopic Isakhiwo sihlukile.

(4) Ukuhlanganiswa kabusha kwezitini ze-magnesia-chromium: i-magnesia-chromium powder exutshiwe incibilikiswa indlela yokuncibilika kagesi, futhi ukuncibilika kufakwe isikwele ukuze kwakhiwe isakhiwo esincane se-microstructure, ne-magnesia-chromium spinel namakhristali ahlangene e-periclase njengokwakheka okuyisigaba esiyinhloko Izinto ezihlanganisiwe ze-magnesia-chromium zichotshozwa zibe ngusayizi othile wezinhlayiyana, zixutshwe futhi zibunjwe, bese zidutshulwa ukulungiselela izitini ezihlanganisiwe, noma zisetshenziswe ngqo njengezitini ezihlanganisiwe zamakhemikhali.

Ukwakheka kwesitina okuhlanganisiwe kubonakala ngezinga eliphakeme lokuxhuma okuqondile kanye nenani elikhulu lesigaba se-spinel desolvent: i-crystal eyisisekelo equkethe inani elikhulu lesigaba sokuqothula empeleni iguqula izakhiwo zomzimba nezamakhemikhali ze-periclase, njengokunciphisa ukwanda okushisayo Coefficient. , Thuthukisa ukumelana nokushaqeka okushisayo, ukuthuthukisa ukumelana nokuguguleka kwe-acid-alkaline slag. Izitini ezihlanganisiwe zinezici ezifanayo kulezo zezitini ezihlanganisiwe, kepha zinokumelana okungcono ekushintsheni kokushisa okusheshayo kanye ne-microstructure efanayo kakhulu kunezitini ezihlanganisiwe.

Ihlanganiswe nesitina se-magnesia chrome, iyi-matrix enamagrafu amahle nokusatshalaliswa kwepore efanayo kanye nama-microcracks, futhi ukuzwela kwayo ekushintsheni okungazelelwe kokushisa kungcono kunokuncibilika nokuphonsa. Ukusebenza okuphezulu kokushisa komkhiqizo kuphakathi kwezitini ezihlanganisiwe nezitini ezixhumene ngqo.

(5) Izitini ezihlanganisiwe ze-magnesia chrome: Beka ingxube ye-magnesia ne-chre ore esithandweni sikagesi se-arc ukuze zincibilike ngokuphelele, bese uthela lokho kuncibilika kwesikhunta sokuphonsa. Ngesikhathi senqubo yokuqinisa, kwakhiwa izigaba ze-periclase ezinamathele kanye ne-spinel crystal, futhi kwakhiwa isakhiwo esihle se-crystal ngasikhathi sinye, ngakho-ke isitini se-magnesia chrome sinamandla amakhulu okushisa aphezulu kanye nokumelana nokugqwala kwe-slag.

Izitini ze-Magnesium chrome zisetshenziswa kakhulu embonini ye-metallurgical, njengokwakhiwa kwamathoshi wesithando somlilo ovulekile, izithando zomlilo kagesi, iziko lokucwenga ngaphandle kwesithando kanye nezinye izikhungo ezingancibilikisi zokuncibilikisa insimbi. Ingxenye yokushisa okuphezulu yodonga lwesithando samandla kagesi esisezingeni eliphezulu yenziwa ngezitini ezihlanganisiwe ze-magnesia-chrome, indawo yokuguguleka okukhulu kwesithando somlilo esingaphandle kwesithando yenziwe ngezinto zokwenziwa, kanti phezulu Indawo enesisekelo sesithando sokuncibilikisa insimbi esenziwe ngensimbi yenziwa ngezitini ezihlanganisiwe ze-magnesia-chrome nezinto zokwenziwa. Yenziwe ngezitini zemagnesia chrome. Ngaphezu kwalokho, izitini zemagnesia-chrome nazo ziyasetshenziswa endaweni evuthayo yamakhemikhali ajikelezayo kasimende kanye nama-regenerors e-glass kilns.

Inkomba yezobuchwepheshe: