DK
SILICA REFRACTORIES FOR COKE FURNACES
SPECIFICATION OF UKRAINE 23.2-00190503-409:2015
DK grade silica refractories are used in by-product coking industry. Particularly, they are used for laying of coke furnaces with coking chamber volume up to 40 m3.
Scope of application of DK grade products: wall, head products, vertical heating flue areas and vertical heating flue crossovers, abradable by coke, bottom and etc. Herein, depending on application, there are changed the properties of such products: compression ultimate strength is higher (50 N/mm2), and interconnected porosity is less (16%) in baked in the hearth products.
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 |
|---|---|
| Apparent specific gravity, g/cm3 | 1,85-1,9 |
| Compression ultimate strength, N/mm2, not less than | |
| Density, g/cm3 | 2,37 |
| Fe2O3, % | ≤1,7 |
| Fusion point, °С, not less than | 1650 |
| Interconnected porosity, %, not more than | |
| Residual variation of dimension (growth) | 0,4 (1450°С) |
| SiO2, % | ≥94 |
Specification
| Parameter description | Value |
|---|---|
| Type | siliciferous |
| Group | silica (SiO2 > 93%) |
| Refractoriness value | fire resistance (1580 to 1770°С) |
| Heat treatment method | burnt |
| Molding process | semidry forming |
| Binding type 1 | with inorganic binders |
| Binding type 2 | ceramic |
| Intended purpose | repair/construction |
| Reference document for product properties | Silica refractories for coke furnaces Specification of Ukraine 23.2-00190503-409:2015 |
| Reference documents for product dimensions | Refractories of general purpose according to DSTU GOST 8691:2009 (ISO 5019-1-84) (with amendments No.1,2,3,4) |