Construction and Maintenance of Wear-Resistant Refractory Plastics
Construction of Wear-Resistant Refractory Plastics at the water-cooled air chamber. Due to its special design and construction, the following points should be paid attention to in the construction of refractory plastics for water-cooled air chambers:
(1) The surface of the water-cooled pipe and pin is painted with asphalt paint, and the duct is covered with 2mm thick ceramic fiber paper.
(2) Refractory plastics must be driven at one time, the thickness exceeding the standard shall be excavated, and the thickness less than 45 ° shall be excavated to make up. However, the plastic must be compacted, and there must be no voids or cavities.
(3) Leave an expansion joint at an interval of 600mm × 600mm to avoid irregular cracks. Divide and frame construction during construction. The expansion joint is left in the middle of the tube and cut out with a knife. The thickness is half of the refractory plastic. It is also necessary to use a 3mm vent pin to make holes in the refractory plastic, with a pitch of about 150mm and a depth of 10-15mm.
(4) The mixer must be cleaned before using plastics.
(5) There is an expansion joint between the pouring material and the plastic material on the upper wall of the water-cooled air chamber, and a 3mm expansion joint is left in the vertical direction.
(6) Radial expansion joints are left at the corner of the air outlet of the water-cooled air chamber.
Note: When the temperature is higher than 35 °, take measures to reduce the temperature. It is strictly forbidden to expose the material to the sun.
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| Construction of CFB Boiler Castable Refractory |
For CFB boiler start burner under the bed, precautions for the construction of refractory castables:
In some power plants, for the start-up burner under the CFB boiler bed, insulation castable + refractory castable are used for construction. In some power plants, the form of thermal insulation + refractory brick + refractory castable is used. In the former, the moisture content of the heat-insulating castable is about 40-50%, which results in a high water content in the burner under the bed, which makes it difficult to maintain heat. To this end, we take the following conservation measures.
(1) Construction of heat-preservable castables should be made as early as possible. Wet drainage holes should be opened in advance before construction, and long wet drainage holes can be opened at the bottom.
(2) The amount of water added to the heat-preservable pouring material should be reduced as much as possible under the condition of compaction, and controlled to about 30%.
Rongsheng refractory castable manufacturers provide high-quality wear-resistant castables and refractory plastics for water-cooled air chambers. At the same time, our castable production line also provides CFB boilers with the production of wear-resistant refractory plastics and wear-resistant castables. We have advanced production equipment and experienced technical R & D team. If you are looking for refractory castable products, please contact us.
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