Refractory Mortar is a high-temperature bonding material used for joining firebricks, refractory castables, and furnace lining components. It offers strong adhesion, excellent thermal resistance, and good workability for various industrial applications.
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Refractory Mortar is a specially formulated bonding material designed to withstand high temperatures, thermal cycling, and chemical attack in industrial furnaces and kilns. It is made from high-grade refractory aggregates, binders, and additives to ensure strong bonding between firebricks and monolithic refractory structures.
Depending on composition—such as fireclay-based, high-alumina, silica, magnesia, or phosphate-bonded systems—refractory mortar can be tailored for different furnace atmospheres and service conditions.
With excellent adhesion, crack resistance, and easy application by troweling or gunning, refractory mortar is widely used in refractory bricklaying, furnace repair, and refractory installations demanding long service life and structural stability.
1.Silica Mortar
|
Item |
Specification |
||||
|
GNR94 |
GNJ94 |
GNB94 |
GNB96 |
||
|
SiO2 % |
≥94 |
≥94 |
≥94 |
≥96 |
|
|
Al2O3 % |
/ |
/ |
≤1 |
≤0.6 |
|
|
Fe2O3 % |
≤1.0 |
/ |
≤1.0 |
≤0.7 |
|
|
Refractoriness, ℃ |
≥1680 |
≥1660 |
≥1700 |
≥1720 |
|
|
Cold Flexural Bonding Strength, MPa |
Drying at 110℃ |
≥1.0 |
≥1.0 |
≥0.8 |
≥0.8 |
|
1400℃×3h |
≥2.0 |
≥2.0 |
≥0.8 |
≥0.5 |
|
|
0.2MPa RUL, T2 ℃ |
≥1580 |
≥1550 |
≥1600 |
≥1620 |
|
|
Bonding Time, min |
1~2 |
1~2 |
2~3 |
2~3 |
|
|
Particle Size, % |
＜2mm |
100 |
100 |
100 |
100 |
|
＞1mm |
≤1 |
≤3 |
≤2 |
≤2 |
|
|
＜0.074mm |
≥60 |
50~70 |
≥60 |
≥60 |
|
2.Alumina-silicate Mortar
|
Item |
Specification |
||||||
|
LN65 |
LN75 |
LN65P |
LN75P |
GN85P |
GN90P |
||
|
Al2O3 % |
≥65 |
≥75 |
≥65 |
≥75 |
≥85 |
≥90 |
|
|
Refractoriness, ℃ |
≥1760 |
≥1780 |
≥1780 |
≥1780 |
≥1780 |
≥1800 |
|
|
Cold Flexural Bonding Strength, MPa |
Drying at 110℃ |
≥1 |
≥1 |
≥2 |
≥2 |
≥2 |
≥2 |
|
1400℃×3h |
≥4 |
≥4 |
≥6 |
≥6 |
/ |
/ |
|
|
1500℃×3h |
/ |
/ |
/ |
/ |
≥6 |
≥6 |
|
|
0.2MPa RUL T2 ℃ |
/ |
/ |
≥1400 |
≥1600 |
≥1650 |
||
|
PLC, % |
1400℃×3h |
-5~+1 |
/ |
||||
|
1500℃×3h |
/ |
-5~+1 |
|||||
|
Bonding Time, min |
1~3 |
||||||
|
Particle Size, % |
＜1mm |
100 |
|||||
|
＞0.5mm |
≤2 |
||||||
|
＜0.074mm |
≥50 |
≥40 |
|||||
3.Alkaline Mortar
|
Item |
Specification |
|||||
|
MN91 |
MN95 |
MN97 |
MLN70 |
MLN80 |
||
|
MgO % |
≥91 |
≥95 |
≥97 |
≥70 |
≥80 |
|
|
Al2O3 % |
/ |
8~20 |
5~10 |
|||
|
Cold Flexural Bonding Strength, MPa |
Drying at 110℃ |
≥1.5 |
≥1.5 |
≥1.5 |
≥1.5 |
≥1.5 |
|
1500℃×3h |
≥3.0 |
≥3.0 |
≥3.0 |
≥3.0 |
≥3.0 |
|
|
PLC, % 1500℃×3h |
-4~+1 |
-4~+1 |
||||
|
Bonding Time, min |
1~3 |
1~3 |
||||
|
Particle Size, % |
＜1mm |
100 |
||||
|
＞0.5mm |
≤2 |
|||||
|
＜0.074mm |
≥60 |
|||||
4.SiC & C Mortar
|
Item |
Specification |
||||
|
SCN |
TN-1 |
TN-2 |
TN-3 |
||
|
SiC % |
≥85 |
/ |
/ |
/ |
|
|
Fixed Carbon, % |
/ |
≥50 |
≥55 |
≥58 |
|
|
Ash, % |
/ |
≤7 |
≤5 |
≤2 |
|
|
Volatile, % |
/ |
≤43 |
≤40 |
≤40 |
|
|
Flexural Bonding Strength, MPa |
200℃×24h |
≥2(110℃×12h) |
/ |
8 |
8 |
|
600℃×3h |
≥9(1400℃×3h) |
/ |
1 |
2.5 |
|
|
Bonding Time, min |
1~3 |
/ |
/ |
/ |
|
|
Bulk Density, g/cm3 |
≥1.7 |
/ |
/ |
/ |
|
|
Seam, mm |
/ |
≤1 |
≤1 |
≤1 |
|
Refractory Mortar is widely used in:
Bricklaying for industrial furnaces and kilns
Firebrick and insulating brick installation
Repairing cracks, joints, and worn refractory linings
Steel industry: ladles, tundishes, reheating furnaces
Cement industry: rotary kilns, preheaters, coolers
Petrochemical and refinery furnaces
Incinerators and boilers
Chimneys, fireplaces, and high-temperature masonry
Comprehensive Refractory Product Range
We manufacture 3 main types of refractory materials — refractory castables, high alumina cement, and refractory bricks — covering 100+ industrial furnace types worldwide.
Certified Quality and International Standards Compliance
All batches undergo strict quality control. Products comply with ISO, ASTM, and GB standards, ensuring reliable performance in high-temperature industrial applications.
Annual Production Capacity of 130,000 Tons
With a large-scale capacity of 130,000 tons per year, we guarantee stable supply and on-time delivery for long-term and large-volume projects.
Exported to 120+ Countries and 1,000+ Projects
Our products have been successfully delivered to over 120 countries, supporting more than 1,000 industrial projects, including cement, steel, incineration, glass, and petrochemical furnaces.
20+ Years of Experience in Refractory Manufacturing
With over 20 years of experience, we understand real furnace conditions and deliver materials proven in long-term industrial operations worldwide.
Professional Technical Support and Free Samples
We provide technical assistance from material selection to installation guidance, with free samples available for testing and supporting 1,000+ projects globally.
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