K23 insulating firebrick is a grade of mullite insulating brick. Its main component is high-quality mullite. It is used in furnace equipment to help improve the thermal efficiency of the equipment. As a manufacturer, Kerui can provide standard bricks in various sizes as well as custom-shaped bricks.
- Al2O3: ≥42-48%;
- Bulk Density: 0.55-1.0g/cm³;
- Refractoriness Under Load: 1230-1300ºC;
- Cold Crushing Strength: 1.2-3MPa;
- Size: 230*114*65mm (standard)/And other sizes;
Basic Parameters of K23 Insulating Firebrick
| Item/Grade | KR-23 | |||
|---|---|---|---|---|
| Type | A | B | C | D |
| Al2O3, % | ≥42 | ≥42 | ≥45 | ≥48 |
| Fe2O3, % | ≤1.2 | ≤1.2 | ≤1.0 | ≤1.0 |
| Bulk Density, g/cm³ | 0.55 | 0.6 | 0.8 | 1.00 |
| Reheating Linear Change, % | ≤-0.5 | ≤-0.55 | ≤-0.4 | ≤-0.3 |
| Temperature*12h | 1230℃ | 1260℃ | 1300℃ | 1300℃ |
| Cold Crushing Strength, MPa | ≥1.2 | ≥1.5 | ≥2.3 | ≥3 |
| Thermal Conductivity 350℃, W/(m·K) | 0.17 | 0.19 | 0.24 | 0.31 |
Shapes of K23 Soft Fire Brick
The appropriate brick shape improves construction efficiency, furnace thermal efficiency, and the service life of the furnace.
- For conmmon insulating firebrick shapes, Kerui offers straight bricks, arch bricks, wedge bricks, and so on.
- For custom-shaped bricks, we can manufacture them according to the customer’s provided drawings.
Quality Control System of K23 Insulating Brick
- Strict raw material quality control;
- Fully automatic batching system;
- 2*168-meter tunnel kilns;
- Physical and chemical laboratory testing meets customer requirements;
- Testing reports issued according to customer specifications;
- ISO 9001, ISO 14001, CE Certificate, etc.;
Features of K23 Brick in Furnaces
- Lightweight: Low density helps reduce equipment load.
- High temperature resistance: The mullite composition provides excellent high-temperature performance.
- Good thermal insulation: This feature significantly reduces heat loss, which saves energy.
- Corrosion resistance: Strong resistance to various molten metals and slags.
- High mechanical strength: Good compressive strength and impact resistance.
Checking of K23 Insulating Firebrick
For each batch of JM23 bricks, Kerui factory conducts sampling inspections for appearance, smoothness, and dimensions. This ensures that the products received by the customer meet the required standards.
Packaging and Shipping of Insulating Fire Bricks K23
The standard packaging is wooden pallet packaging. In addition, we can also provide customized packaging according to customer requirements.
For standard products and items in stock, the delivery lead time is generally 15-30 days.
Global Customers Buying K23 Insulating Firebrick
Over 50 customers have purchased Kerui K23 bricks. They came from South Korea, Russia, etc.
- First, Kerui offers these customers cost-effective factory prices.
- Second, we provide custom-shaped insulating bricks based on customer requirements.
- Finally, we offer after-sales construction guidance to our customers.
Application Kilns and Parts
K23 firebrick is primarily used for the lining, roof, walls, bottom, and flue gas channels of high-temperature equipment.
- Ceramic Kilns: Glass melting furnaces, glass annealing kilns, glass casting kilns, etc.
- Glass Kilns: Glass melting furnaces, glass annealing kilns, etc.
- Metal Smelting Furnaces: Electric furnaces, heating furnaces, etc.
- Industrial Heating Furnaces: Petrochemical heating furnaces, hot air furnaces, etc.
- Heat Treatment Furnaces: Annealing furnaces, quenching furnaces, etc. View more details on Linkedin.
Kerui Refractory is Your Top Choice
- 1-on-1 dedicated international sales manager consultation service;
- Professional technical support service;
- Mold and bricks customization service;
- Quick delivery for in-stock items;
- On-site construction technical guidance after sales.
