Manufacturing method for prolonging service life of KR stirrer
A production method and agitator technology, which are applied in the direction of stirring devices, furnaces, lighting and heating equipment, etc., can solve the problems of KR agitator scrapping, pouring material falling off, buffering effect limitation, etc., achieve low crack number, reduce expansion degree, The effect of cushioning extrusion stress
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Embodiment 1
[0018] First select the steel core, remove impurities from its surface, rinse it and dry it; weld a group of rivets with different heights on the surface of the steel core, the height is 30-40mm; cover the surface of the steel core with a layer of 20mm thick refractory fiber material , the density of the refractory fiber material is 200kg / m 3 , the thermal conductivity is 0.085W / m.k, and the service temperature reaches 1200°C; a layer of castable is coated on the refractory fiber material layer, and the thickness of the castable is 60-80mm; after the castable is coated, the whole device is baked for 48 hours at a temperature of 115 °C; continue to heat the baked device to make the temperature reach 350 °C for 14 hours.
Embodiment 2
[0020] First select the steel core, remove impurities from its surface, rinse it and dry it; weld a group of rivets with different heights on the surface of the steel core, the height is 40-50mm; cover the surface of the steel core with a layer of 10mm thick refractory fiber material , the refractory fiber material density is 280kg / m 3 , the thermal conductivity is 0.085W / m.k, and the service temperature is 1300°C; coat a layer of castable on the refractory fiber material layer, with a thickness of 60-100mm; after coating the castable, bake the whole device for 60 hours at a temperature of 135°C ;Continue to heat the baked device to make the temperature reach 340°C for 12h.
Embodiment 3
[0022] First select the steel core, remove impurities from its surface, rinse it and dry it; weld a group of rivets with different heights on the surface of the steel core, with a height of 60-70mm; cover the surface of the steel core with a layer of 50mm thick refractory fiber material , the refractory fiber material density is 190kg / m 3 , the thermal conductivity is 0.085W / m.k, and the service temperature reaches 1400°C; coat a layer of castable on the refractory fiber material layer, with a thickness of 90-110mm; after coating the castable, bake the entire device for 60 hours at a temperature of 150°C; Continue to heat the baked device until the temperature reaches 320°C for 8 hours.
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