Yintoni izitena eziRefractory?

Isitena esiphikisayoyimathiriyeli ye-ceramic ehlala isetyenziswa kwiindawo eziphakamileyo zobushushu ngenxa yokungatsha kwayo kwaye ngenxa yokuba sisigqubuthelo esifanelekileyo esinciphisa ilahleko yamandla. Izitena eziphikisayo ngokuqhelekileyo zenziwe nge-aluminium oxide kunye ne-silicon dioxide. Ikwabizwa ngokuba "isitena somlilo."

Ukubunjwa koDongwe oluRefractory

Udongwe oluphikisayokufuneka iqulathe umlinganiselo ophezulu wesilicon dioxide "engenabungozi" kunyealuminiyamioksidi. Bafanele babe nezixa ezincinane kakhulu zekalika eyingozi, imagnesium oxide, iiron oxide, nealkali.
I-Silicon Dioxide: I-Silicon dioxide (SiO2) iyathamba malunga ne-2800℉ kwaye ekugqibeleni iyanyibilika kwaye ijike ibe yinto yeglasi malunga ne-3200℉. Iyanyibilika malunga ne-3300℉. Lo mgangatho ophezulu wokuthambisa kunye nokunyibilika kwenza kube yinto ephambili yokuvelisa izitena eziphikisayo.
I-Alumina: I-Alumina (i-Al2O3) inobushushu obuphezulu bokuthambisa kunye nokunyibilika kune-silicon dioxide. Inyibilika malunga ne-3800℉. Ngoko ke, isetyenziswe ngokudibeneyo ne-silicon dioxide.
Ikalika, i-magnesium oxide, i-iron oxide, kunye ne-alkali: Ubukho bezi zithako ezinobungozi kunceda ukunciphisa ukuthamba kunye nobushushu obunyibilikayo.

Iimpawu eziphambili zeZitena eziRefractory

Isitena esiphikisayos ngokubanzi tyheli-mhlophe ngombala
Ziyakwazi ukumelana nobushushu kunye namandla amakhulu oxinzelelo
Ukwakhiwa kweekhemikhali zabo kwahluke kakhulu kwezo zitena eziqhelekileyo
Izitena ezilahlayo ziqulethe malunga ne-25 ukuya kwi-30% ye-alumina kunye ne-60 ukuya kwi-70% ye-silica.
Kwakhona ziqulethe i-oxides ye-magnesium, i-calcium, kunye ne-potassium
Izitena eziphikisayoingasetyenziselwa ukwakha iziko, iziko, njl.
Ziyakwazi ukumelana namaqondo obushushu ukuya kutsho ku 2100 degrees celcius
Banomthamo wobushushu obumangalisayo onceda izakhiwo ezahlukeneyo ukuba zihlale zizinzile kumaqondo obushushu agqithisileyo.

Inkqubo yokuvelisa izitena eziphikisayo

Izitena zomlilo zenziwe ngeenkqubo ezahlukeneyo zokwenza izitena, ezinjengodaka oluthambileyo, ukucinezela okushushu, kunye nokucinezela okomileyo. Ngokuxhomekeke kwizinto eziphathekayo zesitena somlilo, ezinye iinkqubo ziya kusebenza kangcono kunezinye. Izitena zomlilo zivame ukubunjwa kwimilo yoxande kunye nemilinganiselo ye-9 intshi ubude × 4 intshi ububanzi (22.8 cm × 10.1 cm) kunye nobukhulu phakathi kwe-intshi eyi-1 kunye ne-3 intshi (2.5 cm ukuya ku-7.6 cm).

Ukulungiselela imathiriyeli ekrwada:
Izinto eziphikisayo: Izinto eziqhelekileyo eziqhelekileyo ziquka i-alumina, i-aluminium silicate, i-magnesium oxide, i-silica, njl. Ezi zixhobo eziluhlaza zilinganiswe ngokweempawu ezifunekayo kunye neentlobo.
Isibophelelo: Udongwe, igypsum, njl.
Ukuxuba kunye nokusila:
Beka izinto ezilungiselelwe ekrwada kwisixhobo sokuxuba ukuxuba kunye nokuxuba ukuqinisekisa ukuba izinto ezahlukeneyo eziluhlaza zixutywe ngokupheleleyo kwaye zixutywe ngokulinganayo.
Izinto ezixubileyo eziluhlaza zixutywe ngokucokisekileyo nge-grinder ukwenza amaqhekeza afane kwaye afane.
Ukubumba:
Izinto ezixutywe kunye nomhlaba zifakwe kwi-mold mold kwaye zenziwe zibe yimo yezitena ngokuxutywa kwe-vibration okanye i-extrusion molding.
Ukomisa:
Emva kokubumba, izitena kufuneka zomiswe, ngokuqhelekileyo ngokumisa umoya okanye ukomisa kwigumbi lokumisa, ukususa umswakama kwizitena.
Sintering:
Emva kokumisa, izitena zifakwe kwisitya sezitena ezichasayo kwaye zifakwe kwiqondo lokushisa eliphezulu ukutshisa i-binder kwizinto eziluhlaza kwaye zidibanise iinqununu ukwenza isakhiwo esiqinileyo.
Ubushushu be-sintering kunye nexesha liyahluka ngokuxhomekeke kwizinto ezahlukeneyo kunye neemfuno, kwaye zidla ngokuqhutywa phantsi kweemeko eziphezulu zokushisa ngaphezu kwe-1500 ° C.

Izinto eziluncedo zokuSebenzisa izitena eziRefractory okanye izitena zomlilo

Ukusebenzisaizitena refractoryinikeza itoni yeenzuzo. Ziyabiza kakhulu kunezitena eziqhelekileyo ngenxa yobuchule bazo obukhethekileyo bokugcina i-insulating. Nangona kunjalo, banikezela ngeenzuzo ezizodwa ngokutshintshiselana notyalo-mali lwakho olongezelelweyo. Ababoneleli beZitena eziBonelekileyo eIndiya baqinisekisa unikezelo lwezitena zeMagnesia kweli lizwe kwaye banikezela ngezitena ezixhathisayo neziluncedo zilandelayo:

I-Insulation egqwesileyo
Izitena eziphikisayo zisetyenziselwa ubukhulu becala kwiipropati zabo ezimangalisayo zokukhusela. Zithintela ukungena kobushushu. Kwakhona bagcina isakhiwo sikhululekile ehlotyeni nasebusika.

Zomelele kunezitena zesiqhelo

Izitena eziphikisayo zomelele kunezitena eziqhelekileyo. Yiyo loo nto bomelele kunezitena eziqhelekileyo. Kananjalo zikhaphukhaphu ngokumangalisayo.

Nayiphi na imilo kunye nobungakanani
Ababoneleli beZitena eziBonelekileyo eIndiya baqinisekisa ukubonelela ngezitena zeMagnesia kweli lizwe kwaye banikezela ngezitena ezikwaziyo ukuziqhelanisa. Uninzi lwabavelisi kunye nabanikezeli banikezela ngezitena ezilungiselelwe ubungakanani obufunwayo kunye nemilinganiselo kubathengi.

Zisetyenziselwa ntoni izitena zeRefractory?

Izitena eziphikisayofumana isicelo kwiindawo apho i-thermal insulation ibaluleke kakhulu. Lo mzekelo uquka iziko. Zilungele phantse zonke iimeko zemozulu ezigqithisileyo. Abaphuhlisi abaninzi abaziwayo bade basebenzise ezi zitena kwiiprojekthi zokwakha izindlu. Kwiimeko ezishushu, izitena eziphikisayo zigcina ingaphakathi lipholile kunye neemeko ezibandayo kude. Zikwayigcina ishushu indlu.
Kwizixhobo zendlu, ezifana ne-ovens, i-grills, kunye neendawo zomlilo, izitena eziphikisayo ezisetyenziswayo zihlala zenziwe ngodongwe oluqulethe ubukhulu becala i-aluminium oxide kunye ne-silicon dioxide, izinto ezikwaziyo ukumelana nokushisa okuphezulu. I-aluminiyam oxide ineempawu ezikhanyayo, ngelixa i-silicon dioxide iyisigqubuthelo esigqwesileyo. I-aluminium oxide eninzi ikhona kumxube, iqondo lokushisa eliphezulu liyakwazi ukumelana nezitena (ingqalelo ebalulekileyo yokusetyenziswa kwezoshishino) kwaye iya kuba yindleko ephezulu. I-silicon dioxide inombala ongwevu okhanyayo, ngelixa i-aluminiyam oxide inombala otyheli okhanyayo.

Kuhlala kubalulekile ukugxininisa ukuba xa uyila okanye ukwakhiwa kwezakhiwo ezidibana nomlilo, kufuneka uqaphele ukuba izinto ezisetyenzisiweyo zihambelana nemimiselo yendawo. Eli lixabiso elincinci lokuhlawula ukuphepha ilahleko yezinto eziphathekayo okanye iingozi ezimbi ngakumbi. Kuhlala kuyimfuneko ukufuna iingcebiso kwiingcali kunye nabavelisi.