Looking for lightweight, high-temperature insulation solutions that boost furnace efficiency and reduce energy costs?
Kerui JM23/K23 Insulating Fire Bricks are engineered for exactly that — trusted by professionals in ceramics, metallurgy, glass, and petrochemicals worldwide.
🧱 What Are Kerui JM23/K23 Insulating Bricks?
Kerui JM23 (also known as k23 insulation brick) insulation bricks are high-porosity, low-density refractory bricks designed for high-temperature industrial environments where heat retention and energy savings are critical.
These bricks are made from high-purity fireclay and processed with advanced foaming and sintering technologies to ensure low thermal conductivity, high strength, and reliable performance in demanding applications.
🔍 Product Highlights & Technical Properties
At Kerui, we understand what our clients need — reliability, performance, and consistency. Here's what you can expect from our JM23/K23 bricks:
| Property | Kerui JM23 / K23 Specification |
|---|---|
| Maximum Service Temp. | 1260°C (2300°F) |
| Bulk Density | 0.6 – 0.8 g/cm³ |
| Thermal Conductivity @500°C | ≤ 0.18 W/m·K |
| Cold Crushing Strength | ≥ 1.0 MPa |
| Al₂O₃ Content | 40–45% |
| Fe₂O₃ Content | ≤ 1.0% |
💡 Key Features:
Excellent thermal insulation
Low heat storage and thermal conductivity
High dimensional accuracy
Easy to cut and install
Suitable for non-load-bearing hot face or backup insulation
📐 Sizes & Customization
We provide a range of standard sizes, and support OEM customization to meet your design requirements.
✅ Standard Sizes (mm):
230 × 114 × 76
230 × 114 × 64
230 × 114 × 32
🛠️ Custom shapes (curved bricks, arch keys, notches) are available upon request with CAD drawings.
📦 Packaging & Global Shipping
Kerui bricks are carefully packaged to ensure safety during transportation:
Shrink-wrapped on fumigated wooden pallets
Protected with plastic film and corner guards
Labeled with batch numbers and product specs
🚚 Shipping Capacity:
20-foot container: ~6,500 – 8,000 bricks
Gross weight: 20 – 24 tons
Lead time: 7–15 days from order confirmation
Delivery terms: FOB, CIF, CFR, DDP available
💲 MOQ, Samples & Quotation
We’re flexible with both bulk and small trial orders:
✅ Minimum Order Quantity: Send the details to us
📦 Free samples available
📄 Detailed proforma invoice with HS code and specifications
📧 Send us your required size, quantity, and destination port for a fast quote.
📜 Certifications & Technical Documentation
Kerui Refractory holds ISO 9001:2015 certification, and provides full product documentation:
✅ Technical Data Sheet (TDS)
✅ Material Safety Data Sheet (MSDS)
✅ Third-party test reports upon request
✅ Export experience to over 60 countries, including USA, Germany, Turkey, India, South Africa, and Brazil
🧩 Typical Applications
Kerui JM23/K23 insulating bricks are widely used in:
🔥 Ceramic kilns (shuttle kilns, tunnel kilns)
🔩 Industrial furnaces (annealing, heat treatment)
🧪 Laboratory high-temp furnaces
🪨 Petrochemical reactors
🏭 Steel and aluminum industry
🧱 Backup lining for high-temp refractory walls
🤝 Why Choose Kerui?
With over 20 years of refractory manufacturing experience, Kerui provides:
In-house production with strict quality control
Reliable logistics and fast delivery
Strong technical team for customization & support
Excellent service from inquiry to after-sales
