Heavy Refractory Silica Brick For Furnace Top

1.Product Overview

This silica brick is made from high-purity quartz stone via precision crushing, mixing, high-pressure molding, and high-temperature sintering. The SiO₂ matrix forms a stable cristobalite structure during production, which enhances its high-temperature strength and acid resistance. Unlike ordinary refractory bricks, it has a low load softening start temperature (≥1620℃) and minimal thermal expansion, solving the pain points of furnace top deformation and acid slag erosion in high-temperature industrial environments. Standard shape is brick, with full customization support for special furnace top structures.

 

2.Key Features

Superior High-Temp Performance：Refractoriness 1790℃, load softening temperature ≥1620℃, maintaining structural stability in long-term furnace top operations (e.g., coke oven top linings).

Strong Acid Corrosion Resistance：SiO₂ content ≥93% resists weakly acidic slag and gas erosion, ideal for cement rotary kiln transition zones and glass furnace regenerators.

Excellent Dimensional Stability：True density ≤2.34g/cm³, apparent porosity ≤25%, minimal thermal expansion to prevent furnace top cracking from temperature fluctuations.

High Mechanical Strength：Cold crushing strength ≥80MPa, withstanding the weight of furnace top equipment and material impact without deformation.

Cost-Effective & Durable：Long service life (2-3 years longer than ordinary bricks) reduces replacement frequency; factory-direct pricing ($450-$530/ton) lowers procurement costs.

 

3.Technical Parameters

| Parameter | Specification |

|--------------------------|---------------------|

| SiO₂ Content | ≥93% |

| Al₂O₃/CaO/MgO/CrO/SiC Content | Trace amounts |

| Fe₂O₃ Content | ≤1.6% |

| Refractoriness | 1790℃ |

| Load Softening Temperature (0.2MPa) | ≥1620℃ |

| Cold Crushing Strength | ≥80MPa |

| True Density | ≤2.34g/cm³ |

| Apparent Porosity | ≤25% |

| Shape | Standard brick (customizable) |

| MOQ | 1 ton |

 

4.Application Scenarios

Coke Ovens：Furnace top linings and combustion chamber walls, resisting high-temperature coke gas corrosion and thermal shock.

Hot Blast Stoves：Heat storage chamber linings, ensuring efficient heat transfer and stable hot air supply for blast furnaces.

Metallurgy & Cement Industry：Blast furnace top covers, cement rotary kiln preheater linings, and molten metal flow channel covers-withstanding acid slag and high-temperature impact.

Glass & Chemical Industry：Glass furnace regenerator grids and chemical reactor tops, enduring acidic flue gas and chemical media erosion.

 

5.Service and Support

Customization：Free shape/size customization (MOQ 1 ton) for non-standard furnace tops; supports drawing-based and sample-based customization to fit specific equipment.

Pricing & Discounts：1-2 tons: $450-$530/ton; ≥3 tons: negotiable bulk price; $80 off for $1000+ orders.

Samples & Quality Assurance：Free samples (customer covers shipping); 1-year quality warranty, with batch test reports and CE certification provided.

Packaging & Delivery：Standard packaging: wooden box + pallet (1.5-2 tons/pallet); lead time 15 days (1-2 tons), negotiable for bulk orders (≥3 tons); shipped via Qingdao/Tianjin ports.

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