Segondè alumina brik difevle di brik ak kontni Al2O3 plis pase 48%. Materyèl anvan tout koreksyon se boksit alumina segondè oswa lòt materyèl bwit refractory ak kontni alumina segondè tankou alumina tabular, alumina kalsine elatriye. Brik alumina segondè yo ak pwopriyete ki estab, segondè refractoriness sou 1770 degre, ekselan rezistans salop elatriye.
Brik ki gen gwo refractoriness anba chaj ak pèfòmans ranpe ki ba yo te fè soti nan materyèl kalite siperyè anvan tout koreksyon tankou boksit super klas, korundum fusion, mullite fusion elatriye. Brik sa yo ak fluaj ki ba tèmik, segondè rezistans korozyon, ekselan rezistans chòk tèmik elatriye, yo apwopriye pou gwo ak mwayen cho eksplozyon recho.
Pwosesis pwodwi pou brik alumina segondè yo sanble ak sa yo ki nan brik kalsine dife. Pou brik dife alumina segondè, matyè premyè kalsine yo plis aplike, apeprè 90 ~ 95%. Matyè premyè kalsine yo distribye ak trete ak retire fè anvan yo te fanm k'ap pile, kidonk tanperati tire nan brik alumina segondè pi wo. Brik alumina segondè super ak klas siperyè yo frinte anba tanperati 1500-1600 degre.
Youn nan pwopriyete enpòtan k ap travay nan brik dife segondè alumina se fòs estriktirèl li yo nan tanperati ki wo, ki anjeneral evalye pa tanperati deformation ralantisman chaj. Ranpe nan tanperati ki wo te mezire tou pou reflete fòs estriktirèl tanperati ki wo. Rezilta tès yo montre ke tanperati a ralantisman anba chaj ogmante ak ogmantasyon nan kontni Al2O3.
Lè kontni an nan alumina se mwens pase 70%, tanperati a ralantisman chaj nan segondè alumina refractory depann sou pwopòsyon nan faz kristal mullite ak faz likid, ak ogmante ak ogmantasyon nan kontni mullite. Kantite lajan an ak pwopriyete faz likid gen enfliyans evidan sou tanperati a ralantisman anba chaj. Se poutèt sa, diminye kontni an enpurte nan materyèl la anvan tout koreksyon se benefisye amelyore tanperati a ralantisman chaj ak ranpe tanperati ki wo.
Gwo ALUMINA FIRE Brik Done pwodwi:
|
Materyèl |
Komen |
Espesyal |
|||||||||||||
|
Atik |
SK36 |
SK38 |
TS80 |
TS85 |
SL-92 |
SL-90 |
SL-85 |
SL-80 |
SL-75 |
SL-70 |
SL-60 |
SL-50 |
|||
|
Pirometrik kòn ekivalan Orton kòn |
35-36 |
37-38 |
38 |
﹥38 |
40 |
40 |
40 |
39 |
39 |
38 |
37 |
36 |
|||
|
Refractoriness (degre) |
1785 |
1810 |
1835 |
1840 |
– |
– |
– |
– |
– |
– |
– |
– |
|||
|
0.2 MPa mou anba chaj (%) |
– |
– |
– |
– |
1700 |
1700 |
1700 |
1670 |
1650 |
1580 |
1550 |
1500 |
|||
|
Dansite esansyèl (kg/m³) |
2300-2350 |
2400-2450 |
2550-2650 |
2650-2750 |
3.10 |
2.95 |
2.90 |
2.85 |
2.70 |
2.62 |
2.50 |
2.40 |
|||
|
Porosite aparan (%) |
20.0-22.0 |
19.0-20.0 |
18.0-19.0 |
17.0-18.0 |
16 |
16 |
19 |
18 |
18 |
18 |
18 |
18 |
|||
|
Fòs kraze frèt (MPa) |
45-48 |
50-55 |
60-65 |
70-75 |
80 |
80 |
800 |
750 |
700 |
700 |
650 |
600 |
|||
|
Modil rupture (kg/cm²) |
70-80 |
80-90 |
90-100 |
150-180 |
– |
– |
– |
– |
– |
– |
– |
– |
|||
|
Ekspansyon tèmik nan 1000 degre (%) |
– |
– |
– |
– |
– |
– |
0.75 |
0.7 |
0.65 |
0.60 |
0.55 |
0.50 |
|||
|
Rechofe tès, chanjman lineyè pèmanan apre chofaj nan |
1500 degre, 2h (%) |
– |
– |
– |
– |
±0.2 |
±0.2 |
±0.2 |
±0.2 |
±0.2 |
±0.2 |
±0.2 |
±0.2 |
||
|
1400 degre (%) |
(+)0.5 |
(+)1.00 |
(+)1.02 |
– |
– |
– |
– |
– |
– |
– |
– |
– |
|||
|
SiO2 (%) |
38.2 |
20.2 |
14.0 |
8.7 |
– |
– |
– |
– |
– |
– |
– |
– |
|||
|
Al2O3 (%) |
48-55 |
70-75 |
81.1 |
85 |
92 |
90 |
85 |
80 |
76 |
70 |
65 |
50 |
|||
|
Fe2O3 (%) |
1.8 |
1.8 |
1.8 |
1.8 |
0.8 |
0.8 |
1.0 |
1.0 |
– |
– |
– |
– |
|||
|
Cao (%) |
0.4 |
0.4 |
0.3 |
0.2 |
– |
– |
– |
– |
– |
– |
– |
– |
|||
|
Na2O+K2O+Li2O (%) |
0.5 |
0.5 |
0.3 |
0.2 |
– |
– |
– |
– |
– |
– |
– |
– |
|||
Baj popilè: segondè alumina brik dife, Lachin segondè alumina brik dife manifaktirè, Swèd, faktori
