Silica Refractory Mortars

Silica refractory mortars are widely used in high-temperature industrial equipment such as coke ovens, hot blast stoves, glass melting furnaces, and insulating silica bricks. They feature high refractoriness, high refractoriness under load, and reasonable bonding time.

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$Silica Refractory Mortars$

Physical and Chemical Indicators

Item		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 Bending Bonding Strength (MPa)	Dried at 110℃	≥ 1.0	≥ 1.0	≥ 0.8	≥ 0.8
Cold Bending Bonding Strength (MPa)	1400℃×3h	≥ 2.0	≥ 2.0	≥ 0.8	≥ 0.5
Refractoriness Under Load T2 (0.2MPa, ℃)		≥ 1580	≥ 1550	≥ 1600	≥ 1620
Bonding Time (min)		1~2	1~2	2~3	2~3
Particle Size (%)	＜ 2mm	100
Particle Size (%)	＞ 1mm	≤ 1	≤ 3	≤ 2	≤ 2
Particle Size (%)	＜ 0.074mm	≥ 60	50~70	≥ 60	≥ 60

Alumina Silicate Refractory Mortars

Alumina silicate refractory mortars feature high bonding strength, stable overall masonry structure, good gas tightness, good chemical stability, and a long service life. They have excellent workability during use and small shrinkage after firing.

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$Alumina Silicate Refractory Mortars$

Physical and Chemical Indicators

Item		LN65	LN75	LN65P	LN75P	GN85P	GN90P
Al₂O₃ (%)		≥ 65	≥ 75	≥ 65	≥ 75	≥ 85	≥ 90
Refractoriness (℃)		≥ 1760	≥ 1780	≥ 1780	≥ 1780	≥ 1780	≥ 1800
Cold Bending Bonding Strength (MPa)	Dried at 110℃	≥ 1	≥ 1	≥ 2	≥ 2	≥ 2	≥ 2
Cold Bending Bonding Strength (MPa)	1400℃×3h	≥ 4	≥ 4	≥ 6	≥ 6	/	/
Cold Bending Bonding Strength (MPa)	1500℃×3h	/	/	/	/	≥ 6	≥ 6
Refractoriness Under Load T2 (0.2MPa, ℃)		/	/	≥ 1400	≥ 1600	≥ 1650
Permanent Linear Change (%)	1400℃×3h	-5~+1		/
Permanent Linear Change (%)	1500℃×3h	/		-5~+1
Bonding Time (min)		1~3
Particle Size (%)	＜ 1mm	100
Particle Size (%)	＞ 0.5mm	≤ 2
Particle Size (%)	＜ 0.074mm	≥ 50		≥ 40

Basic Refractory Mortars

Basic refractory mortars use magnesia or a combination of magnesia and calcia as main components. They feature high refractoriness, strong resistance to alkaline slag, high bonding strength, and strong sealing performance.

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$Basic Refractory Mortars$

Physical and Chemical Indicators

Item		MN91	MN95	MN97	MLN70	MLN80
MgO (%)		≥ 91	≥ 95	≥ 97	≥ 70	≥ 80
Al₂O₃ (%)		/			8~20	5~10
Cold Bending Bonding Strength (MPa)	Dried at 110℃	≥ 1.5
Cold Bending Bonding Strength (MPa)	1500℃×3h	≥ 3.0
Permanent Linear Change (%) at 1500℃×3h		-4~+1			-4~+1
Bonding Time (min)		1~3
Particle Size (%)	＜ 1mm	100
Particle Size (%)	＞ 0.5mm	≤ 2
Particle Size (%)	＜ 0.074mm	≥ 60

Silicon Carbide and Carbonaceous Refractory Mortars

In addition to the high refractoriness and strong adhesiveness that general refractory mortars should possess, silicon carbide refractory mortars also have relatively good volume stability, good resistance to alkali corrosion, good thermal shock resistance, and low thermal expansion.

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$Silicon Carbide and Carbonaceous Refractory Mortars$

Physical and Chemical Indicators

Item		SCN	TN-1	TN-2	TN-3
SiC (%)		≥ 85	/	/	/
Fixed Carbon (%)		/	≥ 50	≥ 55	≥ 58
Ash Content (%)		/	≤ 7	≤ 5	≤ 2
Volatile Matter (%)		/	≤ 43	≤ 40	≤ 40
Bending Bonding Strength (MPa)	200℃×24h	≥ 2 (Dried at 110℃×12h)	/	8	8
Bending Bonding Strength (MPa)	600℃×3h	≥ 9 (1400℃×3h)	/	1	2.5
Bonding Time (min)		1~3	/	/	/
Bulk Density (g/cm³)		≥ 1.7	/	/	/
Extrusion Joint (mm)		/	≤ 1	≤ 1	≤ 1

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Corundum mullite bricks are characterized by high-temperature resistance, erosion resistance, chemical corrosion resistance, high cold crushing strength, high refractoriness under load, and good thermal shock stability.

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$Refractory Plastics$

Refractory Plastics

Wear-resistant refractory plastics have the advantages of convenient construction, good plasticity, and good wear resistance. The wear-resistant layer after construction features very high strength and wear resistance.

$Refractory Castables$

Refractory Castables

Low and ultra-low cement castables feature small pore size, high density, good volume stability, high strength, and low water addition. They overcome the characteristic of significant strength reduction of ordinary castables at 800~1200℃; instead, their strength increases with rising temperature.

Acid-Resistant Bricks

Acid-resistant bricks possess excellent corrosion resistance to organic and inorganic acids (excluding hydrofluoric acid), along with good strength and wear resistance. They are widely used in acidic atmosphere flues, autoclaves and recovery boilers in the acid pulping industry, as well as large acid-resistant pool containers and storage tanks.