A customer from the cement industry had permanent problems with a hot gas gate valve. The gate valve was made of a stainless steel construction with a refractory heat protection lining. The average gas temperature is in the pipesystem is 800°/1472°F - 1000°C/1832°F.The problems in detail were
- Significant wear due to high dust loading in the gas flow
- Heat exchange problems arose as a result of temperature changes and the result was breakdowns in the refractory lining and problems with the movement of the slide.
We engineer a slider made complete of UHPC HT (High Temperature) with the following characteristics
- High thermal shock resistance
- Thermal stability up to 1100°C/2012°F
- Very high wear resistance
- High impact resistance
- There was no metallic reinforcement used, so there was no metallic thermal expansion
- Due to the very high strength values of the UHPC used, the board thickness could be reduced by more than 60% compared to the old refractory construction.
- This resulted in a weight reduction of almost 50%, which also reduce power consumption.
- a drastic reduction of the idle time and better movability of the gate valve resulted in a 16% better production.
Here are a short video to show the impact resistance of the gate plate
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