Refractories For Hot Blas Stove
hot blast stove checker brick
SiO2 : 95
Bulk density : 1.89g/cm³
Apparent porosity : 22 %
Cold crushing strength : 45 MPa
PRODUCT DESCRIPTION
Introduction
Hot Blast Stove Checker Brick is the core heat-storage refractory component specially designed for the regenerator system of blast furnace hot blast stoves. It is mainly classified into three types: silica checker brick, high alumina checker brick, and clay checker brick. Among them, silica checker brick is the most widely adopted solution for high-temperature and ultra-high wind temperature hot blast stoves due to its superior high-temperature performance.
This checker brick adopts a professional honeycomb through-hole structure, including square holes, round holes and integrated multi-hole forming designs. After standardized orderly stacking inside the regenerator, it forms a large-scale, high-efficiency heat exchange and heat storage system. During the combustion and heating stage, the brick absorbs and stores massive heat from high-temperature flue gas; during the air supply stage, it releases stored heat to warm up cold blast entering the blast furnace. It is an indispensable key component to realize cyclic heat utilization and improve hot blast temperature and overall furnace efficiency.
Features
Large Specific Heat Area & High Heat Exchange EfficiencyThe optimized honeycomb porous structure provides a larger specific heat contact area, realizing rapid heat absorption and heat release, and greatly improving the heat storage and exchange efficiency of hot blast stoves.
Excellent High-Temperature Stability & Low Creep PerformanceFeatures stable volume structure and ultra-low high-temperature creep under long-term high-temperature operation, avoiding structural deformation and collapse of the regenerator layer.
Superior Thermal Shock ResistanceAdapts to frequent temperature alternation and thermal cycling of hot blast stoves, effectively resisting cracking and spalling to ensure long-term stable operation.
Customized Corrosion ResistanceMatched with the actual working atmosphere of hot blast stoves, it delivers reliable resistance against flue gas erosion and medium corrosion, extending the service life of the regenerator lining.
Applications
Exclusively applied to the regenerator heat storage layer of all types of blast furnace hot blast stoves, suitable for high, medium and low temperature working sections according to different material grades.
TECHNIQUE DATA
| Silica checker brick for hot blast stove | RG-95 |
| SiO2 ≥ | 95 |
| Al2O3 ≤ | 1.0 |
| Fe2O3 ≤ | 1.3 |
| Apparent porosity (%)≤ | 22(24) |
| Cold crushing strength (MPa)≥ | 45(35) |
| 0.2MPa refractoriness under load (T 0.6, ℃ )≥ | 1650 |
| True density (g/cm3) | 2.32 |
| Residual Quartz(%)≤ | 1.0 |
| Creep Rate(0.2MPa x 1550℃ x 50h)(%) | 0.8 |
| Thermal Expansion(1000℃)(%)≤ | 1.25 |
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