High Alumina Content: Our dense 3000F bricks typically contain 70% to 85% Alumina. This high concentration ensures a high refractoriness-under-load, meaning the bricks will not deform even when supporting heavy structural weights at peak temperatures.
Low Impurity Profile: We strictly control the levels of Iron Oxide (Fe2O3) and alkali metals. Lower impurities mean a higher melting point and better resistance to carbon monoxide (CO) disintegration and chemical slag attack.
Optimized Microstructure: Through precision firing and vacuum pressing, we achieve a homogeneous structure that resists the internal stresses caused by rapid temperature fluctuations.
1. High temperature resistance
2. Good wear resistance
3. Weakly acidic at high temperatures
4. Strong erosion resistance
5. Good volume stability
6. Low prices
Used for lining blast furnaces, hot blast furnaces, electric furnace roofs, oxygen converters, reverberatory furnaces, and rotary kilns. They are also widely used as regenerative flat furnace checker bricks, plugs for pouring systems, and water mouth bricks, among other applications.
|
Item |
Index |
||||||||
|
Model |
N-1 |
N-2a |
N-2b |
N-3a |
N-3b |
N-4 |
N-5 |
N-6 |
|
|
Refractory temperature（℃≥） |
1750 |
1730 |
1730 |
1710 |
1710 |
1690 |
1670 |
1580 |
|
|
Bulk densityg/cm3 |
2.1 |
-- |
-- |
-- |
-- |
2.0 |
-- |
2.0 |
|
|
Softening temperature under load[0.2MPa*0.6%]≥ |
1400 |
1350 |
-- |
1320 |
-- |
1300 |
-- |
-- |
|
|
Reburning line change rate（%） |
1400℃*2h |
+0.1-0.4 |
+0.1-0.5 |
+0.1-0.5 |
-- |
-- |
-- |
-- |
-- |
|
1400℃*2h |
-- |
-- |
-- |
+0.2-0.5 |
+0.2-0.5 |
+0.2-0.5 |
+0.2-0.5 |
-- |
|
|
Apparent porosity（%≤） |
22 |
26 |
24 |
24 |
26 |
24 |
26 |
28 |
|
|
Normal temperature compressive strength（MPa≥） |
30.0 |
20.0 |
25.0 |
20.0 |
15.0 |
20.0 |
15.0 |
15.0 |
|
Fire Brick 3000F: Engineering Extreme Thermal Resistance for High-Demand Industries
When your industrial processes reach the threshold of 3000 degrees Fahrenheit (1650 degrees Celsius), standard refractory solutions are no longer an option. At this extreme temperature, the structural integrity, chemical stability, and thermal shock resistance of your furnace lining determine the success of your entire operation.
Highland Refractory provides specialized Fire Brick 3000F solutions, specifically engineered to withstand the most punishing thermal environments. Whether you are looking for high-density structural support or high-efficiency thermal insulation, our 3000F series delivers the performance required by modern metallurgy, glass manufacturing, and advanced ceramics.
Understanding the 3000F Threshold: Why Material Composition Matters
Most standard firebricks are rated for 2300F or 2600F. Reaching 3000F requires a significant leap in material science. Our 3000F bricks are formulated with high-purity Alumina (Al2O3) and specialized mullite crystals to ensure they do not soften, shrink, or react under sustained extreme heat.
High Alumina Content: Our dense 3000F bricks typically contain 70% to 85% Alumina. This high concentration ensures a high refractoriness-under-load, meaning the bricks will not deform even when supporting heavy structural weights at peak temperatures.
Low Impurity Profile: We strictly control the levels of Iron Oxide (Fe2O3) and alkali metals. Lower impurities mean a higher melting point and better resistance to carbon monoxide (CO) disintegration and chemical slag attack.
Optimized Microstructure: Through precision firing and vacuum pressing, we achieve a homogeneous structure that resists the internal stresses caused by rapid temperature fluctuations.
Two Pillars of the 3000F Series: Dense vs. Insulating
Depending on your specific furnace design, you may require one or both types of 3000F fire bricks.
3000F Dense High Alumina Bricks These are high-strength, heavy-duty bricks designed for the "Working Lining" where direct contact with molten metal, flame, or abrasive materials occurs.
Best for: Steel ladles, electric arc furnace roofs, and cement kiln burning zones.
Key feature: Massive mechanical strength and erosion resistance.
3000F Insulating Fire Bricks (IFB - K30 Grade) These are lightweight bricks with high porosity, designed to trap heat and reduce energy consumption.
Best for: Lining of laboratory kilns, specialty glass furnaces, and backup insulation in steel furnaces.
Key feature: Extremely low thermal conductivity (low heat storage), allowing for faster heating and cooling cycles.
Technical Specifications: The Highland Quality Benchmark
To help our engineering clients make data-driven decisions, we provide transparent technical parameters for our 3000F refractory products.
Specifications for 3000F Heavy Duty Dense Brick:
Al2O3 Content: 75% - 82%
Classification Temperature: 3000F (1650C)
Bulk Density: 2.60 - 2.85 g/cm3
Cold Crushing Strength: >= 60 MPa
Refractoriness: 1790C (PCE 36)
Linear Change (at 1500C x 3h): +0.1 to -0.3%
Specifications for 3000F Insulating Fire Brick (K30 Grade):
Al2O3 Content: 72% - 75%
Bulk Density: 1.0 - 1.1 g/cm3
Cold Crushing Strength: >= 3.5 MPa
Thermal Conductivity (at 1000C): 0.45 - 0.55 W/m.k
Permanent Linear Change: <= 1.0%
Critical Applications in High-Temperature Environments
The Fire Brick 3000F is a versatile tool used across several heavy industries where standard refractories would fail within hours.
Iron and Steel Production In the steel industry, 3000F bricks are essential for the high-temperature zones of blast furnaces and the linings of tundishes. Their ability to resist the corrosive nature of molten slag while maintaining structural integrity is unmatched.
Glass and Ceramics Manufacturing Glass melting tanks operate at sustained high temperatures for years. Our 3000F blocks are used in the port necks and regenerator crowns where alkali vapors and extreme heat would otherwise cause rapid degradation.
Aerospace and Defense Research Testing components for atmospheric re-entry or rocket engine nozzles requires test chambers lined with 3000F refractory materials. Highland Refractory provides the precision-machined blocks needed for these cutting-edge facilities.
Petrochemical and Power Plants In sulfur recovery units and hazardous waste incinerators, the presence of corrosive gases and high heat requires a lining that is both chemically inert and thermally robust.
The Highland Advantage: Why Global Buyers Trust Our 3000F Series
When you source Fire Brick 3000F from Highland Refractory, you are not just buying a product; you are gaining a strategic manufacturing partner.
Precision Manufacturing: We use state-of-the-art hydraulic presses and automated tunnel kilns. This ensures that every brick in your 10,000-unit order has the exact same dimensions and physical properties.
Custom Shapes and Fabrication: Not every furnace is built with standard bricks. We offer CNC machining for burner tiles, arch bricks, and interlocking blocks tailored to your CAD designs.
Rigorous Quality Assurance: Every batch of 3000F material undergoes laboratory testing for Alumina content, density, and cold crushing strength. We provide a full Mill Test Certificate (MTC) with every shipment.
Expert Logistics for Global Trade: Shipping heavy refractory materials to North America, Europe, or Southeast Asia requires experience. We use reinforced pallets, moisture-proof shrink-wrap, and impact-resistant edge protectors to ensure zero-breakage arrival.
Selection Guide: Is 3000F the Right Choice for You?
Choosing the right refractory temperature rating is a balance of performance and cost.
If your furnace operates at a constant 2400F, a 2600F brick may suffice.
However, if you experience "hot spots," peak surges up to 2800F, or require a significant safety margin to prevent catastrophic lining failure, the Fire Brick 3000F is the industry standard for peace of mind.
Our engineers recommend the 3000F series for any application where the downtime cost of a furnace repair exceeds the initial investment in premium refractory materials. One extended campaign with Highland 3000F bricks can save your facility tens of thousands of dollars in energy costs and lost production time.
Frequently Asked Questions (FAQ) about Fire Brick 3000F
Q: What is the difference between a 3000F brick and a 3200F brick?
A: The primary difference is the Alumina content and the mineral phase. A 3200F brick usually approaches 90% or higher Alumina (Corundum bricks). For 90% of industrial applications, the 3000F brick provides the optimal balance of performance and cost-effectiveness.
Q: Can 3000F insulating bricks be used as a working lining?
A: Only in clean environments with no mechanical abrasion or molten metal contact, such as electric kilns. In most industrial furnaces, 3000F IFBs are used as a secondary layer behind dense 3000F bricks.
Q: Do you offer bulk discounts for large-scale kiln projects?
A: Yes. As a direct manufacturer, Highland Refractory provides tiered pricing for container-load orders. Contact our sales team for a customized quote based on your project volume.
Q: How do you ensure the bricks don't crack during the first firing?
A: We provide a detailed "Baking Schedule" or "Heat-up Curve" with our products. Following a controlled moisture-removal phase is critical to ensuring the longevity of any high-alumina 3000F lining.
Secure Your High-Temperature Infrastructure with Highland Refractory
Don't let inferior refractory materials be the bottleneck of your production. Highland Refractory’s 3000F Fire Bricks are tested, proven, and trusted by engineers worldwide to handle the heat that others cannot.
Silicon carbide plates are mainly composed of silicon carbide (SiC) as the aggregate (with a content usually ≥ 80%).
