Coal spray pipe using refractory material
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Refractory castable
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Details Introduction
The refractory castable for coal spraying pipes is used in kilns with harsh and severe operating conditions. It is made from high-strength materials such as corundum and mullite as aggregates, and ultra-fine powder as a binder to create high-performance refractory castables.
Product characteristics: It has good high-temperature performance, high high-temperature strength, good integrity, no cracking, erosion resistance, and wear resistance.
Application fields: Mainly used for the kiln mouth of lime rotary kilns and cement rotary kilns, as well as the reaction section, combustion chamber, and throat of carbon black furnaces.
Product introduction
The refractory castable for coal spraying pipes is used in kilns with harsh and severe operating conditions. It is made from high-strength materials such as corundum and mullite as aggregates, and ultra-fine powder as a binder to create high-performance refractory castables, which have good high-temperature performance, high high-temperature strength, good integrity, no cracking, erosion resistance, and wear resistance. It is mainly used for the kiln mouth of lime rotary kilns and cement rotary kilns, as well as the reaction section, combustion chamber, and throat of carbon black furnaces.
| Project | Performance indicators | |||
| YK-1/PMG-1 | YK-2/PMG-2 | YK-3/PMG-3 | ||
| (Al₂O₃+MgO)/% ≥ | 90 | / | ||
| Al₂O₃/% > | 70 | 65 | 40 | |
| (Al₂O₃+SiO2+SiC)/% > | / | 90 | 90 | |
| Bulk density/(g/cm³) ≥ | After drying at 110℃ for 24h | 2.8 | 2.7 | 2.5 |
| Room temperature compressive strength/Mpa ≥ | After drying at 110℃ for 24h | 70 | 90 | |
| After firing at 1100℃ for 3h | 60 | 100 | ||
| After firing at 1100℃ for 3h | 80 | 90 | 80 | |
| Room temperature flexural strength/Mpa ≥ | After drying at 110℃ for 24h | 10 | ||
| After firing at 1100℃ for 3h | 10 | |||
| After firing at 1400℃ for 3h | 15 | 12 | ||
| Permanent linear change/%6 | After firing at 1100℃ for 3h | ±0.4 | ||
| After firing at 1400℃ for 3h | ±0.5 | |||
| Thermal shock resistance/time ≥ | Water cooling at 1100℃ | 15 | 25 | |
| Wear resistance/cm ≤ | After firing at 1100℃ for 3h | 7 | 6 | 7 |
| Alkali resistance | 1100℃ | / | Above level 2 | Above level 2 |
Key words:
Coal spray pipe using refractory material
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