Refractory plastic is composed of refractory (bauxite) aggregate and refractory powder, mixed in proportion, adding binders such as plastic white mud or clay and an appropriate amount of plasticizer. It is an unshaped refractory material that is in the form of bulk material or paste and maintains high plasticity for a long time.
Classification of refractory plastics: According to the types of refractory aggregates, they are divided into clay, high alumina, mullite corundum, chromium, silicon carbide, and zirconium. According to the type of binder, it is divided into composite binders such as raw clay and aluminum sulfate, phosphoric acid, phosphate, water glass, and resin. According to the normal temperature hardening properties, it is divided into air-hardening and thermosetting refractory plastics.
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| RS High Alumina Plastic Refractory |
Refractory Plastic Properties
To ensure normal use at high temperatures and smooth construction, refractory plastics should have the following basic characteristics:
1. It has a shelf life of construction time to ensure that the molding performance remains unchanged during the specified storage period.
2. It has good plasticity for easy construction.
3. It has good strength after curing at room temperature so that the frame can be dismantled after construction.
4. It has good high-temperature volume stability to prevent damage to the furnace lining structure due to excessive deformation.
Applications of Refractory Plastics
Refractory plastics are mainly used in the linings and maintenance of furnaces, cyclones, superheaters, flues, etc. of various power station boilers, and in the linings of heating furnace roofs, water-cooled walls, etc. Materials can be divided into high aluminum, clay, corundum, corundum silicon carbide, silicon, magnesia, chromium, etc. According to the classification of binders, there are white mud binders, aluminum phosphate binders, water glass binders, sulfate binders, aluminate binders, etc.
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| Advantages of Rongsheng Refractory Plastics |
Application Advantages of Rongsheng Refractory Plastics
The characteristic of refractory plastic is that it can be constructed into any shape and the construction period is short. It can be constructed by ramming, or it can be repaired according to the damaged location. Moreover, it can be put into use directly according to the furnace temperature without baking. It is a good repair material.
Fire-resistant plastic has good wear resistance, strong plasticity, and good bonding properties. It is mostly used in circulating fluidized bed boilers or heating furnaces. Plastics can be produced in many forms during the production process. If the construction is to be put into use immediately, one-third of the cementing material can be added during production. Trapped materials first, go to the construction site and add the other two-thirds of the PA80 glue, and then the construction can be started. You can also add all the glue into the material, but the packaging must be scientific. Open the plastic packaging at the construction site and put it into use.
The raw material of refractory plastic can be corundum, burnt gemstone, or high-aluminum aggregate. It can be made into plastics of different grades and qualities. However, the cementing material used must be PA80 glue. Glue is made by boiling aluminum dihydrogen phosphate and phosphoric acid. It can be added first or on-site. If it is added on-site, there still needs to be a process of trapping the material to achieve the best results.
Different grades of refractory plastics are determined according to the furnace lining atmosphere, temperature, and wear resistance of the used parts. If the temperature is low, materials suitable for the temperature can be made and produced, and the price is relatively cheap. If the temperature is high or too high, corundum or even zirconium corundum must be used to make it meet the needs of the furnace lining.
The function of refractory plastic is that it has strong plasticity and can be used on the stovetop. It can also be used for pounding on the furnace wall.
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