DL-1.0
Heat insulating lightweight silica refractories.
Specification of Ukraine 23.2-00191738-007:2012
Lightweight silica refractories of DL-1.0 grade differ from the lightweight products of DL-1.2 grade with higher porosity, and, as consiquences, less weight. In its turn, this provides this products with heat insulating properties higher than in other representatives of silica lightweight products.
The DL grade refractories found their use in metallurgical, glass industry, machine-building industry, and are used both in working lining of the furnaces not subject to exposure to molten metal and mechanical shocks, and in intermediate (protective) insulation.
Maximum temperature of their application is 1550°С.
The products are supplied on wooden pallets interlaid with cardboard, with protected corners, wrapped with stretch film and bundled with plastic strip.
Technical requirements
| Parameter description | Value |
|---|---|
| Additional linear growth (shrinkage) at holding within 2 hours and temperature °С, % | 1,0 (1550°С) |
| Apparent specific gravity, g/сm3 | 1,0 |
| Compression ultimate strength, N/mm2, not less than | 3,5 |
| Density, g/сm3 | 2,39 |
| Heat conductivity, W/(mK), at average temperature (350±25)°С | 0,5 |
| Heat conductivity, W/(mK), at average temperature (650±25)°С | 0,6 |
| SiO2, % | ≥90 |
Specification
| Parameter description | Value |
|---|---|
| Type | siliciferous |
| Group | silica with additions (SiO2 - 80-93%) |
| Refractoriness value | fire resistance (1580 to 1770°С) |
| Porosity degree | highly-porous (Ptot 45-75%) |
| Heat treatment method | burnt |
| Molding process | semidry forming |
| Binding type 1 | with inorganic binders |
| Binding type 2 | ceramic |
| Intended purpose | repair/construction |
| scope of application | in working (not protected) lining of furnaces, not subject to exposure to melted iron, abrasion force and mechanical shocks, or in intermediate (protected insulation) |
| Reference document for product properties | Heat insulating lightweight silica refractories. Specification of Ukraine 23.2-00191738-007:2012 |
| Reference documents for product dimensions | according to DSTU GOST 6024:2009 (ISO 5019-3-84) (with amendments No.1,2,3),Specification of Ukraine 23.2-00190503-432:2018, according to DSTU GOST 8691:2009 |