Nagar Associates

 

 

 

INSULATING BRICKS:

                           

Produts

NA INS - 110

NA INS - 135

NA INS - 140

NA INS - 500

NA INS - 650

NA INS - 700

NA INS - 750

 

CHEMICAL:

Sio2(%)	69.7	61.5	54.1	49.14	38.92	35.4	41.32
Al2 O3 (%)	24.3	33.2	41.5	43.8	53.7	55.70	51.2
Fe2 O3 (%)	2.2	1.9	1.8	0.95	1.38	1.40	1.26
Tio2 (%)	2.0	2.5	1.9	1.75	2.6	2.80	2.5
CaO + Mgo (%)	0.5	0.3	0.2	3.6	2.08	3.65	2.17
Others (%)	0.9	0.6	0.5	0.76	1.32	1.05	1.55
Max. Service Temp. (°C)	1000	1350	1400	1300	1430	1400	1430
Nature of Bond	Ceramic	ceramic	ceramic	ceramico	Ceramico Ceramic	Ceramico Ceramic	Ceramico Ceramic
Raw Material Base	Fire Clay & Mica	Fire Clay & Kyanite	Fire Clay & Kyanite	Synrhetic Alumina	Synthetic Alumina	Synthetic Alumina	Synthetic Alumina

 

PHYSICAL:

Rawersible Thermal		0.50	0.50	0.55	0.55	0.55	0.55
Expansion ( % at 1000°c)
BD ( gm/cm3)max	0.90	1.05	1.0	0.55	0.65	0.80	0.80
AP (%) Min.	60	55	55	-	-	-	-
CCS (kg/cm2)Min.	10	25	25	7	25	13	40
PCE (orton) Min.	20	29	30	23	30	30	31
PLC (%) Max.	±1.5 at 1000°c/5hr	±1.5 at 1350 °c/5hr	±1.5 at 1400 °c/5hr	±1.5 at 1300°c/5hr	±1.5 at 1430 °c/5hr	±1.5 at 1400 °c/5hr	±1.5 at 1430 °c/5hr
Thermal Conductivity(Kcal/m/hr/°C)
300 °C-		0.24	0.26	0.17	0.21	0.20	0.21
500 °C-		0.26	0.29	0.18	0.23	0.23	0.24
800 °C-		0.28	0.21	0.21	0.26	0.27	0.28
Wt. of std. Bricks (approx.) (kg.) (230x114x76mm)	1.70	2.10	2.00	1.10	1.30	1.50	1.60
Application area	Backup Lining fo Boiler reheating furnace	Backup Glass tank furnace, Blast furnace.	Backup Glass tank furnace, Blast furnace.	As a backup Lining for special application	As a backup Lining for special application	As a backup Lining for special application	As a backup Lining for special application