Ελαφριά μονωτικά τούβλα πυριτίου

Lightweight silica bricks are also called silica insulation bricks. It is a lightweight refractory material with a silica content of more than 91% and a volume density of less than 1.2g/cm3. The refractoriness and load softening temperature are not much different from ordinary πυριτικά τούβλα with the same composition. Ωστόσο, due to the large number of pores, the compressive strength, αντοχή στη σκωρία, αντοχή στη διάβρωση, και τα λοιπά. are not as good as ordinary silica bricks, but the thermal shock resistance has been improved.

Ελαφριά μονωτικά τούβλα πυριτίου’ physical and chemical indicators

Silica Insulation Bricks
Στοιχείο/Ευρετήριο	RS-0.8	RS-1.0	RS-1.1	RS-1.15	RS-1.2
SiO2 %	≥88	≥91	≥91	≥91	≥91
Bulk Density g/cm3	≤0,85	≤1.00	≤1.10	≤1.15	≤1.20
Αντοχή Ψυχρής Θραύσης Mpa	≥1,0	≥2,0	≥3,0	≥5.0	≥5.0
Θερμική αγωγιμότητα (W/MK) 350℃	0.55	0.55	0.60	0.65	0.70
Permanent Linear Change On Reheating (%)  1450℃*2h	0~+0.5	0~+0.5	0~+0.5	0~+0.5	0~+0.5
0.2Mpa Refractoriness Under Load T0.6℃	≥1400	≥1420	≥1460	≥1500	≥1520
20~1000℃ Thermal Expansion 10.6/℃	1.3	1.3	1.3	1.3	1.3

Application of lightweight silica bricks

Lightweight silica brick is a very special material, mainly used in the glass industry and steel industry. In most cases, lightweight silica bricks and dense silica bricks are used as structural layer parts. It is commonly used in the glass kiln industry, mainly for thermal insulation of the kiln vault, thereby reducing heat loss and increasing the efficiency of the melting process. In the steelmaking industry, lightweight silica bricks are used for lightweight walls and domes of hot blast furnaces.