Acid resistant refractory gunning material is used for spraying of blast furnaces, hot blast stoves, hot blast pipes, flue protection layers, working layers, etc.
Acid resistant refractory gunning material
Acid resistant refractory gunning material is used for spraying of blast furnaces, hot blast stoves, hot blast pipes, flue protection layers, working layers, etc. Reasonable selection of materials, strong adhesion, good integrity, simple construction process, good operation performance, high temperature resistance, high strength and good thermal insulation properties, can meet the requirements of fire resistance, thermal insulation, acid resistance and other conditions. The rapid construction and repair of the whole furnace village is carried out by means of high pressure injection molding.
Acid resistant refractory gunning material features:
It can improve the sealing performance of furnace and hot blast stove
Reduce heat loss and prevent overheating of the furnace shell
Extend the service life of the furnace body and shorten the repair time of the furnace.
Increase productivity.
Detailed indicators of acid resistant refractory gunning material:
|
Index |
FN-130 |
FN-140 |
FL-130 |
FL-S |
MS |
XA |
|
|
chemical composition(%) |
Al2O3 |
≥40 |
≥45 |
≥35 |
≥35 |
≥50 |
≥65 |
|
CaO |
/ |
/ |
/ |
/ |
≤0.5 |
/ |
|
|
Fe2O3 |
/ |
/ |
/ |
/ |
SiO2≤30 |
≤2.0 |
|
|
Refractoriness℃ |
≥1530 |
≥1610 |
≥1530 |
/ |
≥1530 |
≥1770 |
|
|
Flexural strengthMpa |
110℃ |
≥5 |
≥5 |
≥3 |
≥2 |
≥5.5 |
≥6 |
|
hot state |
1300℃ 0.5 |
1400℃ 0.5 |
1300℃ 0.5 |
800℃ 0.5 |
2.5 |
1300℃ 1.0 |
|
|
Rate of change of line after ignition(%) |
1300℃×3h ±1.0 |
1400℃×3h ±1.0 |
1300℃×3h ±1.0 |
800℃×3h ±1.0 |
1300℃×3h ±0.5 |
1300℃×3h ±1.0 |
|
|
Bulk density after burning(g/cm3) |
1300℃×3h ≥1.65 |
1400℃×3h ≥1.80 |
1300℃×3h ≥1.40 |
800℃×3h 09-1.1 |
1300℃×3h ≥2.0 |
1300℃×3h ≥2.20 |
|
|
Compressive strength after burning Mpa |
1300℃×3h ≥1.65 |
1400℃×3h ≥25 |
1300℃×3h ≥15 |
-- |
-- |
1300℃×3h ≥20 |
|
|
Thermal Conductivity (w/m) |
0.58-0.70 1300℃ |
---- |
≤0.30 350℃ |
≤0.27 350℃ |
--- |
---- |
|
|
use |
Blast furnace, hot blast stove system protection layer |
Blast Furnace Top Gas Outlet Pipe System Blast Furnace Bottom |
Hot air duct system protection layer |
Smoke duct (chimney) system |
Blast furnace hot blast furnace ball top protective layer |
Blast furnace hot blast furnace lining spray coating |
|
The unshaped refractory material used when repairing the lining of thermal equipment by spray construction method is called refractory gunning material. It is made of a refractory set with a certain particle gradation
Converter, electric furnace gunning material has the characteristics of high adhesion rate, good high temperature corrosion resistance, etc.
Fireclay bricksis suitable for supporting hot blast stoves of large, medium and small blast furnaces
Corundum bricks are mainly used in iron-making blast furnaces and blast furnace hot blast furnaces, refining furnaces outside steel-making furnaces, sliding water heaters, glass melting furnaces and petrochemical industrial furnaces, etc.
Silica brick: an acidic refractory mainly composed of tridymite, cristobalite and a small amount of residual quartz and glass phases. Its silica content is more than 94%, it has anti-acid slag erosion performance, high high temperature strength, high load softening temperature, long-term use in high temperature flower wells without deformation, but low thermal shock stability (heat exchange in water is 1-4 Second-rate).
The alumina ball is also called the high aluminum accumulation of heat ball.High alumina refractory ball is based on bauxite as the mainly raw refractory material.Adding powder and additives and anchoring agent.After proportioning, molding and high sintering to make it.The production engineering of high alumina refractory ball is similar to that of high alumina refractory brick.It should be based on the properties of raw materials,high alumina refractory ball requires production conditions and other factors to determine.
The chemical composition of bauxite is mainly Al2O3, SiO2, Fe2O3, TO2, accounting for about 95% of the total composition, and the secondary components are CaO, MgO, K2O, Na20, S, MnO2 organic matter and trace components Ga, Ge, etc.
Corundum refractory castable has the characteristics of high strength and good fluidity, which is convenient for construction. It is mainly used for the parts that are easy to be washed and worn, such as the combustion chamber, separator and flue of circulating fluidized bed boiler.

