Uyini umehluko phakathi isitini esiphakeme se-alumina nesitini sobumba?

Abantu embonini ye-refractory bayazi ukuthi izitini zobumba nezitini eziphakeme ze-alumina zivela ekubukeni, kodwa uma umcela ukuthi asho umehluko phakathi kwezitini zobumba nezitini eziphakeme ze-alumina, abantu abaningi abazi. Namuhla abakhiqizi be-Zhengzhou Sheng Energy refractory bazochaza:

Izitini eziphakeme ze-alumina ngokuvamile zenziwe nge-alumina bauxite clinker ephezulu kanye nenani elincane lobumba, ngemva kokugaywa, zithululelwa futhi zibunjwe ngendlela yodaka ngendlela yokukhiqiza igesi noma indlela yegwebu, bese ixoshwa ku-1300-1500 °. C. Kwesinye isikhathi i-alumina yezimboni ingasetshenziswa esikhundleni sengxenye ye-bauxite clinker. Isetshenziselwa ungqimba lwe-lining kanye nokushisa okufakwayo komlilo weziko lamatshe, kanye nezingxenye ezingagqwalile futhi zikhutshulwe izinto ezincibilikisiwe eziqinile ezisezingeni eliphezulu. Lapho uthintana ngqo nelangabi, izinga lokushisa elingaphezulu akufanele libe ngaphezu kuka-1350 ℃.

Izitini ze-alumina eziphakeme zine-refractoriness ephakeme kanye nokushisa okuthambisayo komthwalo kunezitini zobumba, futhi zikwazi ukumelana nokugqwala kwe-slag (ikakhulukazi i-acid slag), futhi lezi zakhiwo zikhula ngokunyuka kokuqukethwe kwe-Al2O3, kodwa ukuzinza okushisayo akukuhle njengezitini zobumba. Izitini ze-alumina eziphakeme zinokuminyana okuphezulu, i-porosity ephansi, amandla aphezulu emishini kanye nokumelana nokugqoka. Inhloko yesithando somlilo wegumbi lomlilo we-coke kanye nezitini ezingezansi zegumbi le-carbonization zakhiwe ngezitini eziphakeme ze-alumina, futhi umphumela ungcono; kodwa ayifanele udonga lwegumbi le-carbonization, ngoba izitini eziphakeme ze-alumina zijwayele ukugoqa amakhona emazingeni okushisa aphezulu. .

Izitini zobumba, ama-thermal insulation refractories abhekisela kuma-refractories ane-porosity ephezulu, i-low bulk density kanye ne-conductivity ephansi yokushisa. Ama-thermal insulation refractories abizwa nangokuthi ama-lightweight refractories, afaka imikhiqizo ye-thermal insulation refractory, ama-refractory fibers kanye nemikhiqizo ye-fiber refractory. I-thermal insulation refractories ibonakala nge-porosity ephezulu, ngokuvamile i-40% -85%; ukuminyana kwenqwaba ephansi ngaphansi kwe-1.5g/cm3; conductivity ephansi ye-thermal, ngokuvamile ngaphansi kwe-1.0W (mK).

Isebenza njengezinto ezishisayo zokushisa izikejana zezimboni, ezinganciphisa ukulahlekelwa ukushisa kweziko, zonge amandla, futhi zinciphise ikhwalithi yezinto zokusebenza ezishisayo. I-thermal insulation refractories inamandla angalungile emishini, ukumelana nokuhuzuka kanye nokumelana nokugqwala kwe-slag, futhi ayifanele isakhiwo esithwala umthwalo wehhashi kanye nokuxhumana okuqondile ne-slag, i-charge, insimbi encibilikisiwe nezinye izingxenye.

Izitini zobumba ziyimikhiqizo ye-acidic refractory ebuthakathaka, engamelana nokuguguleka kwe-acidic slag kanye negesi ene-acidic, futhi ibe nokumelana okubuthakathaka kancane ezintweni ze-alkali. Izitini zobumba zinezakhiwo ezinhle ezishisayo futhi zimelana nokubanda okusheshayo nokushisa okusheshayo.

Ukuphikiswa kwesitini sobumba kuqhathaniswa nalokho kwesitini se-silica, kuze kufike ku-1690 ~ 1730 ℃, kodwa izinga lokushisa laso elithambile ngaphansi komthwalo lingaphansi kuka-200 ℃ kunalelo lesitini se-silica. Ngenxa yokuthi isitini sobumba siqukethe amakristalu e-mullite ane-refractoriness ephezulu, futhi iqukethe cishe ingxenye yesigaba sengilazi ye-amorphous encibilika ephansi.

Okungenhla umehluko phakathi kwezitini eziphakeme ze-alumina nezitini zobumba. Ngethemba ukuthi kuzoba usizo kuwe. Sicela ukhululeke ukusithinta uma uludinga.