Izitini ze-Mullite
Mayelana ne-Mullite Bricks
Izitini ze-Mullite ziyi-aluminium ephezulu ephikisayo ene-mullite njengesigaba sekristalu esiyinhloko.Ngokuvamile, okuqukethwe kwe-alumina kuphakathi kuka-65% no-75%.Ngokungeziwe ku-mullite, amaminerali anokuqukethwe kwe-alumina ephansi nawo aqukethe inani elincane lesigaba se-vitreous kanye ne-cristobalite.Okuqukethwe okuphezulu kwe-alumina nakho kuqukethe inani elincane le-corundum.
Izitini ze-Mullite zine-refractoriness ephezulu, engafinyelela ngaphezu kuka-1790 °C.Izinga lokushisa lokuqala lokuthambisa ukulayisha ngu-1600～1700℃.Amandla okucindezela ekamelweni lokushisa ngu-70-260MPa.Ukumelana nokushaqeka okuhle kokushisa.
Kunezinhlobo ezimbili zezitini ze-sintered mullite nezitini ze-mullite ezihlanganisiwe.
Izitini ze-sintered mullite zenziwe nge-high-alumina bauxite clinker njengento eluhlaza eyinhloko, enezela inani elincane lobumba noma i-bauxite eluhlaza njenge-binder, futhi iyakhiwa futhi ixoshwe.Izitini ze-mullite ezihlanganisiwe zenziwe nge-bauxite ephezulu, i-alumina yezimboni kanye nobumba oluphikisayo, futhi izinhlayiya zamalahle noma ze-coke zengezwa njenge-ejenti yokunciphisa.Ngemuva kokubunjwa, akhiqizwa ngokunciphisa i-electrofusion.
I-crystallization ye-mullite ehlanganisiwe inkulu kune-sintered mullite, futhi ukumelana kwayo nokushaqeka okushisayo kungcono kunokwemikhiqizo ye-sintered.Ukusebenza kwabo kokushisa okuphezulu ikakhulukazi kuncike kokuqukethwe kwe-alumina kanye nokufana kokusabalalisa kwesigaba se-mullite nengilazi.
Izitini ze-Mullite zisetshenziselwa ikakhulukazi ukushisa kwesitofu esishisayo, umzimba womlilo oqhumayo kanye naphansi, ingilazi yokuvuselela isithando somlilo, i-ceramic kiln, ulwelwesi olufile lwe-petroleum cracking system, njll.
Mayelana neSillimanite
Izitini ze-sillimanite zinokuzinza okuhle kokushisa ekushiseni okuphezulu, ukumelana nokuguguleka kwe-glass liquid, ukungcola okuncane kuketshezi lwengilazi.
Ifaneleka kakhulu isiteshi sokuphakela, umshini wokuphakela, umshini wokudonsa amashubhu neminye imishini embonini yengilazi, engathuthukisa kakhulu umkhiqizo.
Ifaneleka kakhulu isiteshi sokuphakela, umshini wokuphakela, umshini wokudonsa amashubhu neminye imishini embonini yengilazi, engathuthukisa kakhulu umkhiqizo.
Inkomba Yomkhiqizo
| INDEX | I-mullite ephansi kathathu | I-mullite ehlanganisiwe | I-Sillimanite | I-mullite ehlanganisiwe | ||||
| I-RBTM-47 | I-RBTM-65 | I-RBTM-70 | I-RBT-M75 | I-RBTM-80 | I-RBTA-60 | I-RBTFM-75 | ||
| I-Refractoriness (℃) ≥ | 1790 | 1790 | 1790 | 1790 | 1810 | 1790 | 1810 | |
| Ukuminyana Ngenqwaba (g/cm3) ≥ | 2.42 | 2.45 | 2.50 | 2.60 | 2.70 | 2.48 | 2.70 | |
| I-Porosity ebonakalayo (%) ≤ | 12 | 18 | 18 | 17 | 17 | 18 | 16 | |
| Amandla Okuchotshozwa Okubandayo (MPa) ≥ | 60 | 60 | 70 | 80 | 85 | 65 | 90 | |
| Ushintsho Lomugqa Ongunaphakade (%) | 1400°×2h | +0.1 -0.1 |
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| 1500°×2h |
| +0.1 -0.4 | +0.1 -0.4 | +0.1 -0.4 | +0.1 -0.4 | +1 -0.2 | ±0.1 | |
| I-Refractoriness Under Load @0.2MPa (℃)≥ | 1520 | 1580 | 1600 | 1600 | 1620 | 1600 | 1700 | |
| I-Creep Rate @0.2MPa 1200°×2h(%) ≤ | 0.1 | ― | ― | ― | ― | ― | ― | |
| I-Al2O3 (%) ≥ | 47 | 64 | 68 | 72 | 78 | 60 | 75 | |
| I-Fe2O3 (%) ≤ | 1.2 | 0.8 | 0.8 | 0.7 | 0.7 | 1.0 | 0.5 | |
