ED-1
SILICA REFRACTORIES FOR ELECTRIC-STEELMAKING FURNACES ACCORDING TO
DSTU 2343-94 (GOST 1566-96)
Silica refractories of this grade are used for electric-steelmaking furnace arches laying. However, subject to agreement with the customer, it is possible to use ED grade refractories for other heat aggregates.
Depending on chemical composition and application, silica products of this type are divided into ED and ED-1.
ED-1 grade silica products with SiO weight content of not less than 95% are used in electric-steelmaking furnaces with capacity less than 50t.
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 |
|---|---|
| Al2O3, % | ≤1,5 |
| CaO, % | ≤2,2 |
| Compression ultimate strength, N/mm2, not less than | 25 |
| Density, g/сm3 | 2,32-2,36 |
| Fire resistance, °С, not less than | 1700 |
| Fusion point, °С, not less than | 1650 |
| Interconnected porosity, %, not more than | 22 |
| SiO2, % | ≥95 |
Specification
| Parameter description | Value |
|---|---|
| Type | siliciferous |
| Group | silica (SiO2 > 93%) |
| Refractoriness value | fire resistance (1580 to 1770°С) |
| Porosity degree | average dense (Ptot 20-30%) |
| 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 electric-steelmaking furnaces with the capacity of up to 50 t |
| Reference document for product properties | Silica refractories for electric-steelmaking furnaces according to DSTU 2343-94 (GOST 1566-96) |
| Reference documents for product dimensions | Silica refractories for electric-steelmaking furnaces according to DSTU 2343-94 (GOST 1566-96) |