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Spray coating
Spray coating is made of high quality bauxite clinker, clay clinker or lightweight insulation material as the main raw material. Several kinds of binding agents and buffers are added to make high quality spray coating with relatively low rebound rate. It is mainly used for spraying furnace body and pipelines where spraying is needed. It is divided into the following types according to the physical and chemical indicators:
Physical and chemical indicators of spray coating
| Product name and brandHeavy |
Spray coating FH-140 |
Acid resistanceSpray coatingCMG-SAR |
Medium heavySpray coating FN-130 |
|
| Al2O3 % ≥ | 45 | 56 | 40 | |
| SiO2 % ≤ | 30 | 20 | ||
| Bulk density after burning g/cm3 ≥ | 1.95 | 2.1 | 1.65 | |
| Refractory ℃ ≥ | 1610 | 1530 | ||
|
Flexural bonding strength Mpa ≥ |
110℃×24h | 5.88 | 4 | |
| Operating temperature×3h | 0.98(1400℃) | 0.5(1300℃) | ||
| Thermal ConductivityW/(m·k) ≤ | --- | (800℃)0.86 | (1000℃)0.75 | |
| Operating temperature×3hChange rate after burning % ≤ | ±1.0（1400℃×3h） | ±1.0（1300℃×3h） | ||
| Maximum use temperature ℃ ≥ | 1300 | 1300 | ||
| Compressive strength 110℃×24h Mpa ≥ | 24.5 | 14 | ||
| Application area | Hot air duct, blast furnace head and gas duct, gravity dust collector | Blast furnace hot blast stove shell inner surface | ||
Physical and Chemical Indexes of Spray Coating
| Product name and brand |
Acid resistanceSpray coating MS-1 |
LightweightSpray coating RT-J |
Spray coating LT-Ja |
|
| Al2O3 % ≥ | 35 | 25-35 | 25-35 | |
| Fe2O3 % ≤ | 1.5 | 2.5 | ||
| Bulk density after burning g/cm3 ≥ | 1.8 | 0.8 | 1.2 | |
| Refractory ℃ ≥ | 1530 | |||
|
Compressive strength Mpa ≥ |
120℃ drying | 3 | 0.8～1.2 | 2.0 |
| Operating temperature×3h | 15 | |||
| Thermal Conductivity W/(m·k) ≤ |
1000℃ 0.18 |
800℃ 0.22 |
||
|
600℃ 0.15 |
600℃ 0.2 |
|||
| Maximum use temperature ℃ | 1300 | 1100 | 1050 | |
Physical and chemical indicators of spray coating
| Product name and brand |
Spray coating CMG-BF |
Spray coating SLCN-130G |
Spray coating LW-13G |
|
| Al2O3 % ≥ | 35 | 45 | 34 | |
| SiO2 % ≤ | 50 | 50 | ||
| 110℃Bulk density after burning g/cm3 ≥ | 1.9 | 1.9 | 1.5 | |
| Flexural strength Mpa ≥ | 110℃ drying | 4.0 | 6.0 | 3.5 |
| 1000℃ | 2.5 | |||
| 1300℃ | 4.0 | 6.0 | 4.5 | |
| Thermal Conductivity W/(m·k) ≤ | （1000℃）0.9 | |||
| Operating temperature×3hChange rate after burning % ≤ |
110℃ -0.2～0 |
110℃ 0.08 |
||
|
1000℃ -1.0～0 |
||||
|
1300℃ -1.8～0 |
1300℃ -0.8～+0.8 |
1300℃ 0.1 |
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| Maximum use temperature ℃ | 1300 | 1350 | ||
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