Light weight mixes
|Name of mix||Main component||Chemical composition, %||Density after firing at 800˚С,|
|Cold crushing strength, N/mm2||Thermal conductivity at mean temperature 500˚С,W/m*K||Max. service temperature, ˚С|
|Al2O3||SiO2||Fe2O3||CaO||3 days after molding||After firing at 800˚С|
|ALAKS 0.4-950||vermiculite, perlite||30||28||9||22||0.4||0.6||0.6||0.14||950|
|ALAKS 0.8-1000||vermiculite, haydite||32||27||11||18||0.8||2.5||1.7||0.2||1000|
|ALAKS 0.8-1000A||vermiculite, haydite||36||28||6||18||0.8||2.5||1.5||0.2||1000|
|ALAKS 0.8-1000A/1,5||lightweight chamotte, perlite||43||31||1.5||21||0.8||4||3||0.2||1000|
|ALAKS 0.8-1250A||lightweight chamotte, perlite||49||34||1.2||12||0.8||3||2||0.2||1250|
|ALAKS 0.9-1000||vermiculite, haydite||32||30||11||17||0.9||5||3||0.22||1000|
|ALAKS 1.0-1000||vermiculite, haydite||32||30||11||17||1||7||3.5||0.24||1000|
|ALAKS 1.2-1200||lightweight chamotte, vermiculite||38||33||9||16||1.2||7||4||0.3||1200|
|ALAKS 1.2-1200Р||lightweight chamotte, vermiculite||38||39||8||13||1.2||5||3||0.3||1200|
|ALAKS 1.0-1250||lightweight chamotte||35||42||7||13||1||6||4||0.3||1250|
|ALAKS 1.0-1250S||lightweight chamotte||38||35||8||16||1||5||4||0.3||1250|
|ALAKS 1.0-1250AS||lightweight chamotte||51||33||1||12||1||10||7||0.3||1250|
|ALAKS 1.0-1350||lightweight chamotte||40||42||2||13||1||6||4||0.3||1350|
|ALAKS 1.2-1350||lightweight chamotte||41||41||2||13||1.2||10||7||0.4||1350|
|ALAKS 1.4-1250||lightweight chamotte||39||39||8||13||1.4||13||5||0.5||1250|
|ALAKS 1.4-1350||lightweight chamotte||43||40||3||12||1.4||13||8||0.5||1350|
|ALAKS 1.4-1350TI||lightweight chamotte||38||42||4||12||1.4||8||6||0.5||1350|
|ALAKS 1.6-1350||lightweight chamotte||43||41||2.5||11||1.6||22||14||0.6||1350|
|ALAKS 1.4-1400Н||lightweight chamotte, bubble alumina||77||9||0.5||12||1.4||30||30||0.55||1400|
|ALAKS 1.0-1500||Lightweight high alumina materials||85||0.2||0.2||14||1||3||3||0.3||1500|
|ALAKS 1.2-1500||lightweight chamotte, corundum||57||31||1||9||1.2||12||8||0.42||1500|
|ALAKS 1.4-1550||lightweight chamotte||67||21||0.8||9||1.4||17||12||0.52||1550|
|ALAKS 1.4-1800||bubble alumina||89||0.1||0.1||10||1.4||18||15||0.75||>1700|
|ALAKS 1.6-1800||bubble alumina||90||0.1||0.1||9||1.55||25||30||0.8||>1700|
|ALAKS 1.6-1800Т||bubble alumina||86||0.2||0.1||12||1.6||30||50||0.85||>1700|
|ALAKS 1.6-1800S||bubble alumina||90||0.1||0.1||9||1.65||30||30||0.9||>1700|
|ALAKS 0.4-950 |
|Insulating castables with density from 0.4 g/cm3 to 1.0 g/cm3 and operating temperature from 950 to 1100°C. They have low thermal conductivity and quite high strength, retain their structure and properties in long-term operation.
ALAKS 0.6-1000 and ALAKS 0.9-1000 castables belong to classes N and O according to ASTM C401 and represent castables of 1:0:6 and 1:2:4 popular series respectively. For twenty years of production ALAKS 0.9-1000 mix has become "classic" material for linings of fired heaters of various designs.
It is recommended to use mixes with density less than 0.6 g/cm3 only in the inner lining layers. They provide highly efficient thermal insulation, as their thermal conductivity just slightly exceeds thermal conductivity of thermal insulating boards and fiber materials.
|ALAKS 0.8-1000А |
|Thermal insulating castables with density of about 0.8 g/cm3 and low or very low iron content, designed for usage in reducing atmosphere, for example, in catalytic reformers, hydrotreaters and syngas generation units.|
|ALAKS 1.1-1100T |
|High-strength lightweight castables designed for service in conditions of frequent temperature changes and moderate erosion impacts.
ALAKS 1.2-1150Н mix can be applied only by casting, while ALAKS 1.1-1100Т and ALAKS 1.1-1150Т can be applied both by casting and gunning.
|ALAKS 1.2-1200 |
|Vermiculite containing mixes designed for operation at temperatures up to 1200°С. The mix with “P” index is to be applied by patching, it is recommended for local repair works, and it is often used for linings of various boilers.|
|ALAKS 1.0-1250 |
|Light weight chamotte based mixes of different density and chemical composition. The mixes combine low thermal conductivity and high strength in relation to their density. They can be used in conditions of moderate abrasive impact. They are widely used in various industries both in inner and working lining layers of high-temperature furnaces.
ALAKS 1.4-1350 and ALAKS 1.6-1350 mixes are often used in single-layer linings of FCCU reactors and regenerators.
ALAKS 1.0-1250АS ALAKS 1.6-1800S
|Self-flowing castables with low thermal conductivity. They flow without vibration. These mixes are indispensable for lining of large-sized structures of irregular shape as they easily fill hard-to-reach areas of a lining.
ALAKS 1.0-1250AC is a self-flowing mix with low thermal conductivity, high strength, low iron content and low heat shrinkage. At long operation, it preserves compact structure with a small number of cracks, so it can be used for linings with complex configuration operated in hydrogen rich environment, for example, in syngas collectors.
|ALAKS 1.4-1400Н |
|Light weight chamotte based castables (ALAKS 1.0-1500 – based on а porous high-alumina filler) operated at temperatures higher than 1400°C. Fine matrix of these castables has complex composition and is characterized by low Fe203 content, that is why they can be used in reducing atmosphere.|
|ALAKS 1.4-1800 |
|High-purity bubble alumina based castables designed for operation at extremely high temperatures or/and in reducing condition, including hydrogen atmosphere. ALAKS 1.6-1800 has strength comparable to the strength of dense castables and standard bricks. As its density is much lower, it can be used as an alternative to conventional dense alumina castables in order to reduce thickness, weight and cost of the lining.
ALAKS 1.6-1800T can be applied by gunning, ALAKS 1.6-1800С, on the contrary, has very high flowability.