Lightweight Refractory Precast for Back up Layer Insulating Castable Precast Block

Product Description

 

Product Description

Laurel refractory precast shapes are factory-manufactured, ready-to-install monolithic refractory products. They are produced by mixing refractory aggregates, powders, binders, and additives, then casting the mixture into molds with vibration, followed by controlled curing and firing (baking) in a factory setting.

Although classified as unshaped refractories (monolithics), they are delivered as preformed shapes, combining the dimensional accuracy of fired bricks with the excellent thermal shock resistance and slag penetration resistance of castables.

 

Product Parameters

1. Rapid Installation
2. Consistent Quality
3. Superior Performance
4. Extended Shelf Life

Parameter	Unit	High-Alumina Precast	Corundum Precast	Low-Cement Precast	SiC-Enhanced Precast
Al2O3 Content	wt%	60-85	85-95	70-85	60-85 (Al2O3+SiC ≥85)
SiC Content	wt%	-	-	-	10-25
Fe2O3 Content	wt%	≤1.5	≤1.0	≤1.2	≤1.0
CaO Content	wt%	≤4.0	≤3.0	≤2.0	≤4.0
Bulk Density	g/cm³	2.2-2.6	2.7-3.0	2.4-2.8	2.6-2.9
Cold Crushing Strength (110ºC×24h)	MPa	40-60	80-120	50-70	70-100
Hot Crushing Strength (1500ºC×3h)	MPa	30-45	60-90	40-55	50-80
Cold Bending Strength	MPa	5-8	8-12	6-9	7-10
Thermal Conductivity (800ºC)	W/(m·K)	1.5-2.0	1.8-2.3	1.6-2.1	1.7-2.2
Linear Change on Heating (1500ºC×3h)	%	-0.3~+0.2	-0.2~+0.1	-0.3~0	-0.2~+0.1
Maximum Service Temperature	ºC	1450-1650	1700-1850	1500-1700	1600-1750
Thermal Shock Resistance (1100ºC→Water)	Cycles	20-30	30-40	25-35	35-45
Apparent Porosity	%	15-22	12-18	14-20	13-19

 

• Factory-controlled quality: Uniform composition, stable performance, and precise dimensions.
• Fast installation: Ready-to-assemble blocks reduce on-site construction time and furnace downtime.
• High-temperature stability: Excellent resistance to heat, corrosion, abrasion, and thermal shock.
• Customization: Supports complex geometries (e.g., burner blocks, cyclone linings) and large-scale production (weight from tens of kg to several tons).

Applications of refractory castable

Metallurgy (steelmaking furnaces, converters), cement (rotary kilns, cyclones), petrochemical (reactors, heat exchangers), power (boilers, incinerators), and industrial furnace linings.

Company Profile

Laurel Group was established in 2003, and with over 20 years of production and trading experience, we are professionally engaged in the research, development, and sales of all types of refractory and insulation materials. 
Refractory materials include alumina series bricks, magnesia series bricks, corundum series bricks, mullite bricks, andalusite bricks. Insulation materials include ceramic fiber products, calcium silicate products, insulating brick, and rock wool insulation for the metallurgy, glass, ceramics, petrochemical, machinery, steel, cement, lime, construction and other industries.

 

OEM and ODM are also welcome here.
We provide a global one-stop purchasing platform for refractory and insulation materials to offer you professional advice, qualified products and good service, helping you to make energy-saving easier.
We passed the ISO 9001 certificate, and many products got approval from domestic and foreign customers; our materials have been exported to Europe, South America, North America, Africa, Oceania, and Southeast Asia ,it is over 50 countries, and built firm business relations with more than 200 foreign companies. 
Hope we will have the opportunity to work with you together.
We warmly welcome you to visit us at any time.

FAQ

Q1. Are you a Manufacturer?
A: Yes, our factory is in Zibo, Shandong province. We also have strong cooperating relationships with other manufacturers for other related products.

Q2. Can we visit your factory?
A: Sure, warmly welcome at any time. Seeing is believing.

Q3. Can you accept OEM or ODM?
A: Yes, customization is also welcome.

Q4. What's the MOQ of the trial order?
A: No limit. We can offer the best suggestions and solutions to meet your requirements.

Q5. What are your payment methods?
A: T/T, L/C, and other payment terms are also available for us.

Q6. How long is the delivery time?
A: Normally, it takes around 10-20 days. It also depends on the quantity of the order size. 

Q7. How about your company's certification?
A: CE, ISO9001, and test report. We also could apply for other necessary certifications.

Q8. How can you control your quality?
A: For each production processing, we have a complete QC system to control the quality during production.

Q9. Do you provide free samples?
A: Yes, free samples are available.