$Rotary cement kiln lined with refractory brick$

Products — Cement industry

Refractories for every zone of the cement kiln

From the preheater and smoke chamber to the burning zone, kiln mouth, tertiary air duct and grate cooler — bricks and castables engineered for coating adherence, alkali attack, abrasion and thermal cycling.

18: Cement-kiln product families
1780 °C: Maximum service temperature
100k t: Annual production capacity
1979: Making refractories since

Product catalogue

Grades & technical data

$High alumina high strength series refractory castables$

Castables

High alumina high strength series refractory castables

Dense high-alumina castables for kiln hoods, coolers and other high-load zones up to 1600 °C.

Model	RTSA-16	RTSA-16K
Maximum operating temperature (°C)	1500	1600
Al2O3 (%)	≤72	≤82
SiO2 (%)	≥20	≥15
Volume density 110 °C×24h (g/cm³)	≥2.55	≥2.85
Flexural strength 110 °C×24h (MPa)	≥10	≥12
Flexural strength 1100 °C×3h (MPa)	≥12	≥12
Compressive strength 110 °C×24h (MPa)	≥80	≥120
Compressive strength 1100 °C×3h (MPa)	≥110	≥140
Linear change after firing 1100 °C×3h (%)	-0.1 ~ -0.3	-0.1 ~ -0.3
Reference water for construction (%)	6~7	6~7
Construction method	Vibration pouring	Vibration pouring

$High strength alkali resistant refractory castable$

Castables

High strength alkali resistant refractory castable

Alkali-resistant castable for preheater and kiln tail zones exposed to alkali salt attack.

Model	RTSA-13NL	RTSA-14N
Maximum operating temperature (°C)	1300	1350
Al2O3 (%)	≤48	≤48
SiO2 (%)	≥50	≥45
Volume density 110 °C×24h (g/cm³)	≥2.10	≥2.20
Flexural strength 110 °C×24h (MPa)	≥7	≥8
Flexural strength 1100 °C×3h (MPa)	≥7	≥8
Compressive strength 110 °C×24h (MPa)	≥70	≥80
Compressive strength 1100 °C×3h (MPa)	≥70	≥80
Linear change after firing 1100 °C×3h (%)	-0.1 ~ -0.5	-0.1 ~ -0.3
Thermal conductivity 350 °C (W/m·K)	≥0.87	≥0.90
Alkali resistance (SA/T808-1987)	Level 1	Level 1

Shaped bricks

Magnesia alumina spinel brick

Chrome-free basic brick for the firing and transition zones of rotary cement kilns.

Model	RTSA-LJ85	RTSA-LJ80	RTSA-LJ75
MgO (%)	≥85	≥80	≥75
Al2O3 (%)	5~10	8~15	8~15
0.2 MPa load softening point (°C)	≥1700	≥1700	≥1650
Cold compressive strength (MPa)	≥40	≥40	≥40
Apparent porosity (%)	≤18	≤18	≤19
Thermal shock stability (1100 °C, water cooling)	≥20	≥20	≥15

Shaped bricks

Magnesia-iron spinel brick

Good coating adherence and thermal shock resistance for the burning zone of large kilns.

Model	RTSA-85	RTSA-TJ80
MgO (%)	≥85	≥80
Al2O3 (%)	≥3	≥3
Fe2O3 (%)	≤5	≤7.5
SiO2 (%)	≤1.0	≤2.0
Apparent porosity (%)	16-17	16-17
Volume density (g/cm³)	≥2.95	≥2.95
Cold compressive strength (MPa)	≥45	≥55
0.2 MPa load softening point (°C)	≥1680	≥1650
Thermal shock stability (times)	≥7	≥8
Thermal conductivity 1000 °C (W/m·K)	2.5	2.5
Thermal expansion 1200 °C (%)	0.9	0.9

Shaped bricks

Magnesia calcium zirconium brick

Zirconia-toughened basic brick with strong resistance to clinker corrosion.

Model	MGG-75
MgO (%)	≥77
ZrO2 (%)	≥7
CaO (%)	≥12
0.2 MPa load softening point (°C)	≥1650
Cold compressive strength (MPa)	≥40
Apparent porosity (%)	≤18

Shaped bricks

Zirconium mullite brick

Abrasion-resistant mullite brick for transition zones and cooler inlets.

Model	RTSA-ZTM
Al2O3 (%)	≥78
Fe2O3 (%)	≤1.5
ZrO2 (%)	≥6.0
Apparent porosity (%)	≤18
Cold compressive strength (MPa)	≥100
Volume density (g/cm³)	≥2.7
Load softening point (°C)	1680
Thermal shock stability (times)	≥15
Wear resistance coefficient (cc)	≤4

$Wear-resistant and erosion-resistant refractory castable$

Castables

Wear-resistant and erosion-resistant refractory castable

High-abrasion castable for tertiary air ducts and dust-laden gas paths.

Model	RTSA-17M
Maximum operating temperature (°C)	1600
Al2O3 (%)	≥75
Volume density 110 °C×24h (g/cm³)	≥2.75
Flexural strength 110 °C×24h (MPa)	≥10
Flexural strength 1100 °C×3h (MPa)	≥11
Compressive strength 110 °C×24h (MPa)	≥100
Compressive strength 1100 °C×3h (MPa)	≥110
Linear change after firing 1100 °C×3h (%)	±0.4

Application guide

Kiln door cover & cooling machine

Recommended castable grade by clinker output for kiln hood and grate cooler.

Model	700-2000 T/D	2500-5000 T/D	5500-10000 T/D
Kiln door cover — product	High-alumina high-strength castable	High-alumina high-strength castable	High-alumina high-strength castable
Kiln door cover — model	RTSA-16	RTSA-16K	RTSA-16K
Cooler — product	High-alumina high-strength castable	High-alumina high-strength castable	High-alumina high-strength castable
Cooler — model	RTSA-16	RTSA-16K	RTSA-16K

Castables

Anti-stripping castable for kiln mouth

SiC-bearing castable resisting spalling and thermal cycling at the kiln nose ring.

Model	RTSA-PA80K
Maximum operating temperature (°C)	1650
Al2O3 + SiC (%)	≥80
SiO2 (%)	≥10
Volume density 110 °C×24h (g/cm³)	≥2.60
Flexural strength 110 °C×24h (MPa)	≥7
Flexural strength 1100 °C×3h (MPa)	≥7
Compressive strength 110 °C×24h (MPa)	≥80
Compressive strength 1100 °C×3h (MPa)	≥80
Linear change after firing 1100 °C×3h (%)	-0.1 ~ -0.5
Reference water for construction (%)	5~6

$Silicon carbide anti-scaling series refractory castables$

Castables

Silicon carbide anti-scaling series refractory castables

Non-stick SiC castable that suppresses build-up in preheaters and smoke chambers.

Model	RTSA-13	RTSA-13H
Maximum operating temperature (°C)	1300	1400
SiC + SiO2 (%)	≥45	≥55
Volume density 110 °C×24h (g/cm³)	≥2.40	≥2.50
Flexural strength 110 °C×24h (MPa)	≥8	≥11
Flexural strength 1100 °C×3h (MPa)	≥9	≥12
Compressive strength 110 °C×24h (MPa)	≥70	≥80
Compressive strength 1100 °C×3h (MPa)	≥80	≥100
Linear change after firing 1100 °C×3h (%)	±0.4	±0.4
Reference water for construction (%)	6~7	6~7

Shaped bricks

Direct bonded magnesia chrome bricks

Direct-bonded basic brick for severe corrosion duty in cement and lime kilns.

Model	RTSA-DMC12	RTSA-DMC9
MgO (%)	≥60	≥70
Cr2O3 (%)	≥12	≥9
SiO2 (%)	≤3.2	≤2.8
0.2 MPa load softening point (°C)	≥1600	≥1650
Cold compressive strength (MPa)	≥35	≥40
Apparent porosity (%)	≥19	≥19
Volume density (g/cm³)	≥3	≥2.98
Thermal shock stability (1100 °C, water cooling)	≥10	≥10

Castables

New plate-shaped corundum castable

Tabular alumina castable rated to 1750 °C for the most demanding hot spots.

Model	RTSA-AM92
Maximum operating temperature (°C)	1750
Al2O3 (%)	≥90
Volume density 110 °C×24h (g/cm³)	≥2.90
Flexural strength 110 °C×24h (MPa)	≥8
Flexural strength 1100 °C×3h (MPa)	≥9
Flexural strength 1500 °C×3h (MPa)	≥12
Compressive strength 110 °C×24h (MPa)	≥80
Compressive strength 1100 °C×3h (MPa)	≥90
Compressive strength 1500 °C×3h (MPa)	≥120
Linear change after firing 1100 °C×3h (%)	±0.3
Reference water for construction (%)	5~6

Shaped bricks

Silicon mullite red brick

Our flagship wear-resistant brick for kiln transition and cooling zones.

Model	RTSA-1650	RTSA-1680	RTSA-1680T
Al2O3 (%)	≥65	≥67	≥70
Refractoriness (°C)	≥1790	≥1800	≥1800
0.2 MPa load softening point (°C)	≥1650	≥1680	≥1690
Cold compressive strength (MPa)	≥95	≥90	≥90
Volume density (g/cm³)	≥2.65	≥2.68	≥2.70
Wear resistance (cc)	≤5	≤5	≤5
Thermal shock stability (1100 °C, water cooling)	≥12	≥12	≥15
Thermal conductivity (W/m·K)	2.5	2.3	2.3

Castables

New low expansion kiln mouth castable

Low-expansion formulation that keeps the kiln mouth crack-free through cycling.

Model	RTSA-75MK
Maximum operating temperature (°C)	1780
Al2O3 + SiC (%)	≥75
SiO2 (%)	Al2O3 + SiO2 ≥80
Volume density 110 °C×24h (g/cm³)	≥2.70
Flexural strength 110 °C×24h (MPa)	≥6
Flexural strength 1100 °C×3h (MPa)	≥7
Flexural strength 1500 °C×3h (MPa)	>12
Compressive strength 110 °C×24h (MPa)	≥110
Compressive strength 1100 °C×3h (MPa)	≥120
Linear change after firing 1100 °C×3h (%)	-0.1 ~ -0.5
Reference water for construction (%)	5~6

Shaped bricks

Anti-stripping high alumina brick

Spalling-resistant high-alumina brick with a proven 2-year life in the preheating zone.

Model	RTSA-KBL70
Al2O3 (%)	≥70
Volume density (g/cm³)	≥2.50
Apparent porosity (%)	≤23
0.2 MPa load softening start temperature (°C)	≥1500
Cold compressive strength (MPa)	≥60
Thermal shock stability (1100 °C, water cooling)	≥5
Service life	More than 2 years in the kiln tail preheating zone

$Special refractory castable for coal injection pipe$

Castables

Special refractory castable for coal injection pipe

Corundum-mullite castable engineered for burner pipes running to 1780 °C.

Model	RTSA-75MP
Maximum operating temperature (°C)	1780
Al2O3 (%)	≥75
SiO2 (%)	Al2O3 + SiO2 ≥80
Volume density 110 °C×24h (g/cm³)	≥2.70
Flexural strength 110 °C×24h (MPa)	≥7
Flexural strength 1100 °C×3h (MPa)	≥7
Flexural strength 1500 °C×3h (MPa)	>12
Compressive strength 110 °C×24h (MPa)	≥110
Compressive strength 1100 °C×3h (MPa)	≥120
Linear change after firing 1100 °C×3h (%)	±0.3

$Corundum and mullite series refractory castables$

Castables

Corundum and mullite series refractory castables

Complete corundum-mullite range covering 1650-1780 °C service temperatures.

Model	RTSA-PA80K	RTSA-75MK	RTSA-AM92
Maximum operating temperature (°C)	1650	1780	1750
Al2O3 + SiC (%)	≥80	Al2O3 + SiO2 ≥80	Al2O3 ≥90
SiO (%)	≥10	≥75	/
Volume density 110 °C×24h (g/cm³)	≥2.60	≥2.70	≥2.90
Flexural strength 110 °C×24h (MPa)	≥7	≥6	≥8
Flexural strength 1100 °C×3h (MPa)	≥7	≥7	≥9
Flexural strength 1500 °C×3h (MPa)	/	>12	≥12
Compressive strength 110 °C×24h (MPa)	≥80	≥110	≥80
Compressive strength 1100 °C×3h (MPa)	≥80	≥120	≥90
Compressive strength 1500 °C×3h (MPa)	/	/	≥120
Linear change after firing 1100 °C×3h (%)	-0.1 ~ -0.5	±0.3	±0.3

Application guide

Tertiary air duct & coal injection pipe

Recommended grade by clinker output for the tertiary air duct and burner pipe.

Model	700-2000 T/D	2500-5000 T/D	5500-10000 T/D
Tertiary air duct — product	Wear- and erosion-resistant castable	Wear- and erosion-resistant castable	Wear- and erosion-resistant castable
Tertiary air duct — model	RTSA-17M	RTSA-17M	RTSA-17M
Coal injection pipe — product	Corundum-mullite burner pipe castable	Corundum-mullite burner pipe castable	Corundum-mullite burner pipe castable
Coal injection pipe — model	RTSA-75MP	RTSA-75MP	RTSA-75MP

Need a lining proposal for your kiln?

Send us your kiln size, daily clinker output and fuel mix — our engineers return a zone-by-zone material selection and quantity take-off.

Request a quote