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
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