Wear-resistant refractory plastic is a kind of unshaped refractory product that is configured with raw materials of corresponding materials according to the working environment and use parts of the kiln. It is generally used in parts of high-temperature kilns that cannot be poured. According to the different parts of its use, its high-temperature resistance is different. The use temperature of wear-resistant plastic refractories for the fluidized furnace is more than 1000 ℃. According to the needs of customers, Rongsheng monolithic refractory manufacturers can customize wear-resistant plastic refractory for fluidized furnace lining. Contact us to get a detailed customized plan for free.
Arrangement of Refractories for Lining of Fluidized Furnace
A fluidized furnace mainly adopts solid fluidization technology to roast sulfide ore. The heat of the reaction is released during the roasting process, and the gas containing sulfur dioxide is mainly used to make sulfuric acid, and the slag is used as a metallurgical raw material.
The body of the fluidized roasting furnace is made of steel shell, lined with insulation bricks, and lined with refractory bricks. The use characteristics of refractory materials for fluidized furnaces. In order to prevent the corrosion of condensed acid, there is an insulation layer outside the steel shell. The lowermost part of the furnace is an air chamber, which is provided with an air inlet pipe, on which is an air distribution plate. The air distribution plate is a refractory concrete hearth, embedded with many wind caps with small holes on the side. The middle part of the furnace is an upwardly expanding cone, and the cross-sectional area of the upper roasting space is larger than that of the boiling layer to reduce the blowing of solid particles. The cooling tube of the waste heat boiler is installed in the boiling layer, and the furnace body is also equipped with a feeding port, a slag overflow port, a furnace gas outlet, a secondary air inlet, and an ignition port. There are explosion-proof holes on the top of the furnace.
According to the characteristics of the furnace body structure of the fluidized furnace, different refractory bricks, refractory castables, and refractory plastics are used for masonry in different parts. Common refractory brick products for fluidized furnaces include clay refractory bricks, high alumina refractory bricks, insulation bricks, etc. There are also special-shaped bricks of various complex structures.
Gradually, clay bricks, ordinary high-alumina bricks, etc. have been unable to meet the wear resistance needs of fluidized furnaces at operating temperatures of 1000 °C. Therefore, it is necessary to use better refractory lining materials to improve the service life of the fluidized furnace refractory lining. In recent years, many refractory manufacturers at home and abroad have developed and produced wear-resistant refractory materials. The wear resistance of its products has greatly improved the wear resistance of ordinary refractory bricks. The wear resistance at room temperature is generally between 5 and 10cm3, and the service life is about 1 to 2 years. Moreover, the quality of wear-resistant refractory materials is greatly improved compared with ordinary refractory materials. However, in order to achieve the ideal performance of the refractory lining, the normal operation time of the refractory lining of the fluidized furnace should be extended. There are also manufacturers using more advanced refractory materials, such as silicon nitride combined with silicon carbide bricks. This kind of refractory material has good wear resistance, and the wear resistance at room temperature is about 1.8 cm3. As expected, its price is naturally quite expensive.
Advantages of Using Wear-Resistant and Refractory Plastics
Wear-resistant refractory plastic is composed of refractory aggregate, powder, binder, and plasticizer. Among them, refractory aggregate is divided into clay clinker, high alumina clinker, corundum aggregate, etc. according to the material. Binders include clay bonds, water glass bonds, phosphoric acid or aluminum phosphate bonds, aluminum sulfate bonds, etc. Boiling furnaces use wear-resistant refractory plastic parts. According to the working environment and use of parts of the kiln, the raw materials of corresponding materials are selected and configured.
Wear-resistant refractory plastics have the following performance characteristics during use.
- It has outstanding wear resistance.
- It can be used as a single-layer wear-resistant lining or combined with PN-GD series products. It is suitable for places with strong scouring and heat insulation.
- The construction time can be adjusted, and it can still maintain a long construction time under high temperatures.
- Good construction plasticity, no swelling, no cracking.
Wear-resistant refractory plastics are mainly used in various heating furnaces that do not directly contact the melt. Such as the burner of the heating furnace, the discharge port of the cement rotary kiln, the feeding port of the shaft kiln, the inner lining of the high-temperature cyclone separator, the furnace roof and furnace wall lining of the steel rolling heating furnace. It can also be used as the lining of various heat treatment furnaces.
What are the Basic Properties of Refractory Plastic Construction?
In order to ensure smooth construction and normal use at high temperatures, refractory plastics should have the following basic properties.
- ①It has certain plasticity and is convenient for construction.
- ② There is a certain storage period to ensure that the molding performance will not change within the specified storage period.
- ③ After curing at room temperature, it has a certain strength, which is conducive to the removal of the frame or handling after construction.
- ④ It has a certain high-temperature volume stability to prevent the lining structure from being damaged due to excessive deformation.
Monolithic Refractory Manufacturer of Plastic Refractory for Boiler
Rongsheng monolithic refractory manufacturer is a powerful manufacturer and seller of monolithic refractory materials. Provide environmentally friendly and cost-saving monolithic refractory lining materials for high-temperature kilns. Plastic refractory for boiler. To extend the service life of the fluidized furnace lining, please choose wear-resistant refractory plastics. To buy high-quality monolithic refractory products, such as refractory castables, refractory plastics (with PA glue), and refractory ramming materials, please contact us. We will customize wear-resistant refractory plastics and other refractory lining materials for you according to the actual working conditions of the refractory lining of your high-temperature kiln.