DV
REFRACTORY AND HIGH-REFRACTORY PRODUCTS FOR LAYING OF HOT BLAST STOVES AND MAINS OF BLAST FURNACES ACCORDING TO
SPECIFICATION OF UKRAINE 23.2-00190503-432:2018
Silica products for hot-blast stoves fall siliciferous type of refractories.
DV grade silica refractories are used in ferrous metallurgy, in blast-furnace practice for case iron obtaining.
Refractories of this grade meet the requirements for fire resistance, thermal resistance, high heat conductivity and heat capacity and chemical resistance, therefore, they are used in high temperature areas of hot-blast stoves.
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/сm3 | 1,9 |
| Compression ultimate strength, MPa (kgf/cm2), not less than | |
| Density, g/сm3 | 2,37 |
| Fe2O3, % | ≥2,0 |
| Fire resistance, °С, not less than | 1690 |
| Fusion point, °С, not less than | 1620 |
| Interconnected porosity, %, not more than | |
| Residual variation of dimension (growth) | 0,4 |
| SiO2, % | ≥93 |
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 | products for laying of hot-blast stoves, hot blast mains, orifices and blast furnace tuyere connections |
| Reference document for product properties | Refractory and high-refractory products for laying of hot blast stoves and mains of blast furnaces according to Specification of Ukraine 23.2-00190503-432:2018 |
| Reference documents for product dimensions | Refractory and high-refractory products for laying of hot blast stoves and mains of blast furnaces according to Specification of Ukraine 23.2-00190503-432:2018 |