| Name of mixture | Core component | Chemical composition, % | Quantity added water, % |
Laying method | Density post-firing at 800˚C, g/cm3 |
Tensile strength in compression, N/mm2 |
Heat conduction- average temperature 500˚C, W/m*K |
Shrinkage after firing at 1600˚C, % |
Temperature application, ˚C |
||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Al2O3 | SiO2 | Fe2O3 | CaO | after drying at 110˚С |
after drying at 110˚С |
after firing at 800˚С |
|||||||
| Aliflex 0.8-1.4/1800 | spherocorundum | 92 | 0.1 | 0.1 | 7.7 | 13-15 | hand laying, sheathing | 1.4 | 20 | 20 | 1.2 | 0 | 1800 |
| 16-19 | vibratory pouring | 1.1 | 10 | 4 | 0.8 | 0.5 | |||||||
| 20-22 | self-expansion | 0.8 | 3 | 1.5 | 0.5 | 0.8 | |||||||
| Aliflex 92TAB | tabular alumina |
92 | 0.1 | 0.1 | 0.7 | 11-13 | hand laying, sheathing | 2.2 | 50 | 45 | 1.2 | -2 | 1600 |
| 20-23 | lightweight vibration |
1.4 | 4 | 3 | 0.5 | -2.5 | |||||||
| Aliflex 69/1.5 | mullite | 70 | 26 | 1.1 | 1.5 | 7-8 | hand laying, sheathing | 2.3 | 30 | 50 | 1.5 | 0 | 1650 |
| 10-11 | lightweight vibration |
1.7 | 3 | 5 | 1 | -0.2 | |||||||
| Aliflex 65/3 | mullite | 65 | 28 | 1.3 | 3 | 6-7 | hand laying, sheathing | 2.2 | 70 | 70 | 1.5 | -0.8 (1400˚С) | 1500 |
| 11-13 | lightweight vibration |
1.4 | 5 | 5 | 0.7 | -1.5 (1400˚С) | |||||||
| These values may vary depending on the characteristics of the raw materials and are not guaranteed. | |
| The technical characteristics of hydraulically curing concrete depend on the amount of water added to the dry refractory mix during concrete preparation. As a rule, exceeding the optimum amount of water added to the dry mix by a few percent facilitates paving, but leads to a reduction in the strength and density of the concrete. Further excessive moistening makes no sense – the water is not “assimilated” by the concrete, and it becomes unfractionated and stratified. When making refractory products and linings from ALIFLEX mixtures, the amount of water added can be varied within extremely high limits, radically changing the density, thermal conductivity and strength of the resulting concrete. By doubling the water content, it is also possible to halve the density of concrete, significantly improving its thermal insulation characteristics. The structure of the concrete becomes more porous and less strong, but retains its homogeneity. The chemical and phase composition of course does not change, the refractoriness remains almost at the same level. |
|
| ALIFLEX 0.8-1.4/1800 | A spherocorundum based variable density mix, which is a modification of the ALAX 1.6-1800 mix, which has been popular for many years. With a low content of added water (13-15%), it is easily poured by hand, with concrete properties close to those of ALAKS 1.6-1800. When the water content increases to 20-22%, the concrete becomes self-dispersible. It can be used to make linings and products with extremely low density and thermal conductivity for such chemical composition and refractoriness. |
| ALIFLEX 92TAB | Tabular alumina-based mix with the same chemical composition as ALIFLEX 0.8-1.4/1800, but designed for the production of denser concrete according to the same scheme. |
| ALIFLEX 69/1.5 ALIFLEX 65/3 |
An example of low-cement refractory concretes whose density and thermal conductivity, unlike standard analogs, can be significantly reduced by simply increasing the amount of water added. |
Warning: Undefined array key "title" in /data01/virt121517/domeenid/www.demomark.ee/htdocs/wp-content/plugins/contact-form-7/includes/contact-form-functions.php on line 239