Izitena eziphezulu ze-alumina ziveliswa nge-chamotte ekhethiweyo ye-bauxite njengeyona nto iphambili ekrwada, igxothwe kwi-1450-1470 ° C ngenkqubo ephambili kunye nolawulo olungqongqo lwekhwalithi. Izitena zoMlilo zeAlumina eziPhakamileyo zenziwa nge-alumina okanye ezinye izinto ezikrwada eziqulethe umxholo ophezulu we-alumina ngokubumba kunye nokudubula. ngenxa yepropathi engathathi hlangothi ye-alumina refractory inokuxhathisa ukukhukuliseka kwe-asidi ye-slag.
Inkqubo yeZitena eziPhezulu zeAlumina
Ngena kuKhetha kunye ne-sieve chamotte ye-deironing ngaphambi kokuqhekeka, enokuphucula umgangatho wezitena ze-alumina eziphezulu. Ngenxa yokuba kukho umlinganiselo ophezulu we-grog kwizithako ezinokufikelela kwi-90 ~ 95%. Khetha kunye nokuhlola i-deironing ngaphambi kokuba i-grog ityunyuzwe.
AmaBanga amathathu eZitena eziPhezulu zeAlumina
Ngokwemixholo eyahlukeneyo ye-Al2O3, izitena eziphakamileyo ze-alumina zingahlelwa zibe ngamaBanga amathathu e-China.
Izitena ze-Alumina zeBanga lokuqala zinezinto ezingaphezu kwe-75% ze-Al2O3.
Izitena ze-Alumina zeBakala II zinomxholo we-60 ~ 75% we-Al2O3.
Izitena ze-Alumina zeBakala III zine-48 ~ 60% ye-Al2O3 umxholo.
Iimpawu zeZitena eziPhezulu zeAlumina
Izitena eziphezulu ze-alumina zineempawu ezintle ezifana nokusebenza kobushushu obuphezulu, ukubola okukhulu kunye nokunganyangeki kokunxiba, ubuninzi bobuninzi, umxholo wentsimbi ephantsi, njl.
| Izinto | Izitena ze-alumina zebanga lokuqala | Isitena se-alumina somgangatho wesibini | Izitena ze-alumina zebanga lesithathu | Izitena ezikhethekileyo ze-alumina zebanga eliphezulu |
| LZ-75 | LZ-65 | LZ-55 | LZ-80 | |
| Al2O3 % ≥ | 75 | 65 | 55 | 82 |
| Fe2O3 % ≤ | 2.5 | 2.5 | 2.6 | 2.0 |
| Ukuxinana koMninzi g/cm3 | 2.5 | 2.4 | 2.3 | 2.6 |
| Amandla Okutyumza okubandayo MPa ≥ | 70 | 60 | 50 | 80 |
| 0.2MPa Refractoriness Ngaphantsi komthwalo ℃ | 1510 | 1460 | 1420 | 1550 |
| Refractoriness ℃ ≥ | 1790 | 1770 | 1770 | 1790 |
| I-Porosity ebonakalayo % ≤ | 22 | 23 | 24 | 21 |
| Ukufudumeza kwakhona utshintsho lomgca 1450℃×2h% | -0.3 | -0.4 | -0.4 | -0.2 |
Ukusetyenziswa kwezitena eziphezulu ze-Alumina
Izitena eziphakamileyo ze-alumina zingasetyenziswa kwiziko eliqhumayo, isitovu esitshisayo, isitofu sombane. kunye nezitena zomlilo ze-alumina eziphezulu ezisetyenziswa kwimimandla yentsimbi kunye nentsimbi, i-nonferrous, iglasi, i-samente, i-ceramics, i-petrochemicals, umatshini, ibhoyila, imboni yokukhanya, amandla kunye noshishino lomkhosi njl.
