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Hot Blast Stove

"A retracting device for preheating the incoming air in an iron blast furnace by using heat from the burning gases of the furnace. "

Hot Blast Stoves consist of the combustion chamber and checker chamber.
The hot stove is essentially a heat exchanger with facility for heat storage) to produce hot blast blown through Tuyere into blast furnace.
In the checker chamber the checker bricks having numerous gas holes through them are piled up playing the role to store heat provided by hot combustion gas.
Three or four hot stoves installed beside one blast furnace are usually operated alternately by the combusting fuel and in blowing hot blast of 1100 - 1300 deg C. Being exposed to such high temperature the hot stove refractories must be sufficiently durable against compression under high temperature for long time showing less deformation as possible. i.e. they must exhibit good creep resistance.

General requirement of hot stove refractories are:

Volumetric stability at relatively high temperature
Little residual shrinkage
Large specific heat
Thermal spalling resistance
Corrosion resistance

Sino-Global offers bricks & mortars for the hot stoves to meet all the above stated requirements based on under the following brands :-

Silica (STOVSIL series), Fireclay (STOV40, 42,36A series), Andalusite (STOVAND series), Mullite (STOVMUL series).

We also offer low creep bearing high alumina bricks (STOV LCHA series); low creep fireclay bricks (STOVFC series)

Product: Hot Blast Refractories

(1) SILICA & FIRECLAY:-

Brand name	SILICA BRICKS		FIRECLAY BRICKS
Brand name	SGRL STOVDOMSIL	SGRL STOVCHKSIL	SGRLSTOV40A	SGRL STOV42A	SGRLSTOV36A
Refractoriness(Deg C)Min.	-	-	1730	1750	1710
AP(%)Max.	22.0	23.0	24.0	24.0	22.0
CCS(MPa)Min.	35.0	30.0	24.5	29.4	54.0
True Sp. Gr.Min.	2.35	2.35	-	-	-
RUL. Ta(Deg C)Min.	1550	-	1350	1400	1300
PLC(%)Max.	-	-	1350 Deg C x 2hr (0 ~ -0.3 )	1450 Deg Cx2 hr (0 ~ -0.4)	1300 Deg Cx 2hr
Creep Rates0.2 MPa x 50 hrs / 1000 Deg C	0.2	-	-	-	-
Thermal Expansion1000 Deg C(%)Max.	1.26	1.26	-	-	-
Chemical composition
SiO2	95.0	95.0	-	-	-
Al2O3	-	-	40.0	42.0	36.0

(2) ANDALUSITE BRICKS

Brand name	SGRL STOV 75SPL	SGRL STOV 72SPL	SGRL STOV 48SPL	SGRL STOV HR42	SGRL STOV HLE	SGRL STOVAND HB	SGRL STOVAND HS	SGRL STOVAND DE
Al2O3 (%) Min	75	72	48	42	57	65	57	55
Fe2O3(%) min	1.2	1.2	1.5	1.5	1.2	0.8	0.8	-
TiO2 (%) Max.	-	-	-	-	-	0.5	0.5	-
K2O + Na2O (%) Max.	-	-	-	-	0.6	0.6	0.6	1
Refractoriness (Deg C) Min.	1790	1790	1750	1750	-	-	-	-
AP (%) Max.	24.0	24.0	20.0	20.0	22.0	20.0	20.0	24.0
BD g/cc) Min.	2.6	2.7	2.35	2.15	2.4	2.45	2.4	2.4
CCS(MPa) Min.	55.0	50.0	50.0	50.0	40.0	50.0	40.0	40.0
MORMPa) Min.	-	-	-	-	15	18	-	-
RUL (Deg C) Min.	T2 1550	T2 1550	T2 1550	T2 1550	T0.5 :1420 T2: 1580	T0.5 :1520, T2: 1630	T0.5 :1470 T2: 1580	T2: 1580
Creep (0.2 MPa/ 50 hrs) (%) Max.	1350 Deg C (20~50 hrs) 0.8MPa	-	-	-	-	1500 Deg C(20 ~ 50 hrs) 0.2	1400 DegC(20~50 hrs)0.2	1450 Deg C(20~50 hrs) 0.2
PLC(%)	-	-	-	1400 DegC 4hrs + 0.2	1500 Deg C 4hrs + 0.2	1500 DegC 4hrs + 0.2	1500 DegC 4hrs + 0.2	1500 Deg C 4hrs + 0.2
Thermal Shock Resistance (cycles) Min.	6	100	50	30	20	20	20	-

(3) MULLITE BRICKS

Brand name	SGRLSTOV MUL 21	SGRLSTOV MUL 22	SGRLSTOV MUL 23A	SGRLSTOV MUL 23B	SGRLSTOV MUL 24	SGRLSTOV MUL 25	SGRLSTOV MUL 26	SGRLSTOV MUL 27
Al2O3(%)Min.	75.0	80.0	65.0	70.0	65.0	65.0	60.0	50.0
Fe2O3(%)Max.	0.5	0.5	0.5	0.5	0.5	1.5	1.5	1.5
Refractoriness(Deg C)Min.	1850	1850	1850	1790	1820	1790	1790	1770
AP(%)Max.	20.0	21.0	19.0	20.0	23.0	24.0	20.0	21.0
BD(g/cc)Min.	2.60	2.70	2.50	2.50	2.45	2.50	2.40	2.30
CCS(MPa)Min.	55.0	45.0	55.0	65.0	45.0	60.0	60.0	55.0
RUL. T2(DegC)Min.	1700	1700	1700	1700	1700	1550	1530	1450
PLC(%)Max.	1500 Deg C/ 4 hrs -0.1~+0.2	1500 Deg C / 4 hrs +0.2~-0.1	1450 Deg C / 2 hrs +0.2~-0.1	1450 Deg C / 2 hrs +0.2~-0.1	1450 Deg C /2 hrs +0.2~-0.1	-	-	-
Creep Rates 0.2 MPa x 50hrs(%)Max.	1500Deg 0.6	1500 Deg 0.6	1450 Deg 0.6	1400 Deg 0.6	1350 Deg 0.8	1300 Deg 0.8	1270 Deg 0.8	-
Thermal Shock Resistance(Cycles)Min.	8	12	15	25	15	-	-	-

(4) LOW CREEP HIGH ALUMINA BRICKS

Brand name	SGRLSTOV LCHA 155	SGRLSTOV LCHA 150	SGRLSTOV LCHA 145	SGRLSTOV LCHA 140	SGRLSTOV LCHA 135	SGRLSTOV LCHA 130	SGRLSTOV LCHA 127
Al2O3(%)Min.	75.0	75.0	65.0	65.0	65.0	60.0	50.0
AP(%)Max.	20.0	21.0	21.0	22.0	22.0	22.0	23.0
BD(g/cc)Min.	2.60	2.60	2.50	2.40	2.35	2.30	2.30
CCS(MPa)Min.	60.0	60.0	60.0	55.0	55.0	55.0	50.0
PLC (%)Max.	1500 Deg C/ 2 hrs -0.2~+0.1	1550 Deg C / 2 hrs-0.2~+0.1	1550 Deg C / 2 hrs-0.2~+0.1	1450 Deg C / 2 hrs-0.2~+0.1	1450 Deg C / 2 hrs-0.4 ~+0.1	1450 Deg C / 2 hrs-0.4 ~+0.1	1450 Deg C / 2 hrs-0.4 ~+0.1
Creep Rates 0.2 MPa x 50 hrs(%)Max.	1550 Deg 0.8	1500 Deg 0.8	1450 Deg 0.8	1400 Deg 0.8	1350 Deg 0.8	1300 Deg 0.8	1270 Deg 0.8

(5) LOW CREEP FIRECLAY BRICKS

Brand name	SGRL STOVFC42A	SGRL STOVFC39	SGRL STOVFC40A	SGRL STOVFC40B	SGRL STOVFC42B	SGRL STOVFC45	SGRL STOVFC42C
Al2O3(%)Min.	75.0	80.0	65.0	70.0	65.0	65.0	60.0
Refractoriness(Deg C)Min.	1750	1730	1730	1750	1750
AP(%)Max.	20.0	22.0	24.0	24.0	24.0	22.0	22.0
BD(g/cc)Min.	2.15	2.10	2.10	2.15	2.25	2.25	2.15
CCS(MPa)Min.	35.0	35.0	30.0	30.0	30.0	40.0	35.0
RUL. T2(Deg C)Min.	1450	1400	1400	1450	1450	-	-
PLC (%)Max.	1400 Deg C/ 4 hrs + 0.2	1400 Deg C/ 4 hrs + 0.2	1300 Deg C/ 4 hrs + 0.2	1350 Deg C/ 2 hrs + 0.2	1400 Deg C /2 hrs + 0.2	1400 Deg C /2 hrs + 0.2	1350 Deg C/ 2 hrs -0.4 ~0.1
Creep Rates 0.2 MPa x 50 hrs(%)Max.	1250 DegC(20-50 hrs)0.2	1200 DegC(20-50 hrs)0.2	1150DegC 0.8	1200Deg C 0.8	1250 Deg C 0.8	1250 DegC 0.8	1200 Deg C 0.8

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