Refractoriness of fire clay bricks price are similar to silica bricks, it could reach 1690℃-1730℃, meanwhile, the refractoriness under load is about 200 ℃ lower than silica bricks. Main phase inside the fire clay bricks is mullite phase with high refractoriness, but there is also much glass phase inside, with low refractoriness, result to lower refractoriness under load.
Fire clay bricks is weak acid refractory material, it has good resistance to acid slag and acid atmosphere/gas, but weak resistance to alkali materials. Fire clay bricks are also with great thermal shock resistance.
According to application for the fire clay bricks price, there are blast furnace clay bricks, hot blast stove clay bricks, large fire clay bricks for flat glass furnace.
Clay refractory bricks for blast furnaces are clay bricks produced from refractory clay and used to build blast furnace linings. Clay refractory bricks for blast furnace are used for the throat, shaft, hearth, bottom of the furnace lining of the small blast furnace and the shaft of the large blast furnace.
Clay refractory bricks for blast furnace are required with:
high cold crushing strength , which can resist long-term operation wear of the charge; small volume shrinkage under long-term operation at high temperature, which is conducive to maintaining the integrity of the furnace lining;
low apparent porosity and low Fe2O3 content, reducing carbon deposition in pores, avoid bricks damage due to the expansion and looseness during application;
Less content of low melting point substances.
Clay refractory bricks for blast furnace have better properties than ordinary clay bricks.
Fire clay bricks price for hot blast stoves are clay bricks made from refractory clay and used to build blast furnace hot blast stoves. They are generally used in hot blast stoves, regenerators and partition walls. Clay bricks for hot blast stoves require good thermal shock resistance, high refractoriness under load and small creep.
Fire clay bricks price for flat glass furnace is generally large bricks with unit weight over 50 kgs. Specifications, dimensions and appearance judgement for such bricks are required to follow standard YB/T 5108-1993
Fire Clay Bricks Price Product Data
|
Material |
Common |
Special |
|||||||||
|
Blast furnace |
Hot blast stove |
Glass Furnace |
|||||||||
|
Item |
SK32 |
SK34 |
ZGN-42 |
GN-42 |
RN-42 |
RN-40 |
RN-36 |
BN-40a |
BN-40b |
||
|
Pyrometric Cone Equivalent Orton cone |
31-32 |
33-34 |
– |
– |
– |
– |
– |
– |
– |
||
|
Refractoriness (℃) |
1715 |
1760 |
176 |
176 |
176 |
174 |
170 |
– |
– |
||
|
Bulk Density (kg/m3) |
2100-2200 |
2200-2250 |
2200 |
2200 |
2200 |
2200 |
2150 |
2250 |
2250 |
||
|
Apparent Porosity (%) |
22-24 |
18-20 |
≤15 |
≤16 |
≤24 |
≤24 |
≤25 |
≤18 |
≤18 |
||
|
Cold Crushing Strength (MPa) |
22-32 |
30-35 |
≥58.8 |
≥49.0 |
≥29.4 |
≥24.5 |
≥19.6 |
≥49.0 |
≥34.3 |
||
|
Modulus of Rupture (kg/cm2) |
55-70 |
60-80 |
– |
– |
– |
– |
– |
– |
– |
||
|
Reheat test,permanent linearchange after heating at |
(1350℃%,3h) |
– |
– |
– |
– |
– |
0~-3 |
0~-0.5 |
|
|
|
|
(1400℃%,2h) |
– |
– |
– |
– |
– |
– |
– |
0~-0.4 |
0~-0.4 |
||
|
(1450℃%,3h) |
– |
– |
0～-2 |
0～-3 |
0~-0.4 |
– |
– |
– |
– |
||
|
(1400℃%) |
0.0-0.2 |
-0.18 |
– |
– |
– |
– |
– |
– |
– |
||
|
0.2 MPa soft under load (%) |
– |
– |
≥1450 |
≥1430 |
≥1400 |
≥1350 |
≥1300 |
≥1450 |
≥1400 |
||
|
SiO2 (%) |
57.8 |
52.4 |
– |
– |
– |
– |
– |
– |
– |
||
|
Al2O3 (%) |
36.2 |
42.1 |
≥42 |
≥42 |
≥42 |
≥40 |
≥36 |
≥40 |
≥40 |
||
|
Fe2O3 (%) |
2 |
1.4 |
≤1.7 |
≤1.7 |
– |
– |
– |
≤1.5 |
≤1.5 |
||
|
Cao (%) |
0.5 |
0.4 |
– |
– |
– |
– |
– |
– |
– |
||
|
Na2O+K2O+Li2O (%) |
0.5 |
0.5 |
– |
– |
– |
– |
– |
– |
– |
||
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