Repairing boiler lining requires resistance to chemical erosion. Chemical erosion is generally acidic, neutral and alkaline, which is different. Choose the appropriate wear-resistant plastic according to the specific situation. Rongsheng amorphous refractory material manufacturer can customize wear-resistant plastic according to actual working conditions. Whether it is for repairing furnace lining or building a new refractory kiln, Rongsheng manufacturer can provide the most suitable lining material solution. Contact Rongsheng for detailed information.
Wear-resistant plastic for repairing boilers against chemical erosion is more convenient to use than castables. It is made of refractory aggregates, fine powders, composite admixtures, and chemical binders, which are mixed and extruded into a plastic block or a mass of mud, which is constructed by ramming. Refractory plastic has high high-temperature strength, good thermal shock stability, and low thermal conductivity. The inner lining of the furnace built with it has strong integrity, peeling resistance, long service life, and energy saving. It is widely used in various high-temperature industrial kilns, such as masonry heating furnaces, soaking furnaces, heat treatment furnaces, etc. It is easy to construct, fast repair speed, high strength and wear resistance, good thermal shock resistance, no cracking, and good sealing. It is mainly used for repairing fluidized bed boilers.
Application Areas of High Temperature Resistant Refractory Plastics
It is mainly used for repairing defective parts of circulating fluidized bed boiler linings and anti-wear treatment of the connection between water-cooled walls and fireproof belts.
(1) Application of refractory plastics in repairing damaged linings of circulating fluidized beds, cyclones and other parts using refractory materials. Any irregular wear parts can be repaired at will without the use of steel templates or molds. After construction, it can be ignited immediately without special maintenance, which can shorten the construction period and save costs.
(2) Wear-resistant treatment of refractory plastics at water-cooled wall pipes. Bake-free refractory plastics can be constructed on water-cooled pipes, and the thickness of the mat can be controlled within 5mm, which is something that other similar products cannot do. The construction of bake-free refractory plastics at water-cooled wall pipes can change the geometric angle of the position, making the transition zone quite flat and close to a plane, thereby reducing the formation of vortices at this location. The residence time of the vortex at this location is combined to greatly reduce the degree of wear.
In addition, it can also be used as lining for various heating furnaces, soaking furnaces, annealing furnaces, sintering furnaces and electric furnace tops in the steel industry.
Pour the fully mixed refractory plastic into the mold and vibrate it in time. The thickness of each feed is controlled within the range of 200~300. The vibration process will expel a large number of bubbles in the material, and it is appropriate to have a slight slurry on the surface. The spacing between each vibration point is controlled at about 200, and large-scale construction must be carried out in sections and continuously. Minimize the construction joints as much as possible, and the interface is concave and convex. Add materials while vibrating. The vibration mold should ensure that each corner is fully filled to give it good mechanical strength. The template of each area should be supported without interruption. When changing the vibration point, it must be inserted or withdrawn slowly to avoid vibration holes. After each layer is vibrated, there is no need to smooth it, just keep it natural. Each layer should be fully vibrated within 20 minutes after adding.
Can water be added to wear-resistant refractory plastic?
Whether water can be added to wear-resistant refractory plastic depends on its specific type and composition.
Basic characteristics and application scope of wear-resistant refractory plastic. Wear-resistant refractory plastic is an amorphous refractory material with excellent wear resistance, fire resistance and convenient construction. It is usually composed of aggregates such as high-alumina bauxite clinker, corundum, mullite and silicon carbide, and is formulated with binders and admixtures. This material is widely used in construction, machinery manufacturing, chemical industry and other fields, especially in high temperature and harsh chemical environments.
Water distribution of different types of wear-resistant and fire-resistant plastics
No high-temperature adhesive binder: Some wear-resistant and fire-resistant plastics do not have high-temperature adhesive binders added when they leave the factory. In this case, water can be added and stirred before ramming. After adding water, the plasticity of the material will increase, making it easier to construct.
Adding high-temperature adhesive binder: If a high-temperature adhesive binder, such as aluminum dihydrogen phosphate or sodium silicate, has been added to the wear-resistant and fire-resistant plastic, water cannot be added and stirred. Adding water will cause the plasticity of the material to deteriorate and it cannot be used for normal ramming, but it can be used for pouring construction.
Effect of adding water on the performance of wear-resistant refractory plastic
Adding water will affect the performance of wear-resistant refractory plastic. Specific effects include:
Deformation and loss of refractory: Water will cause the material to deform and lose its refractory.
Poor construction effect: If ramming construction is carried out after adding water, it will lead to poor construction effect and reduced material strength and durability.
Changes in solidification time and mechanical strength: Adding too much water will prolong the solidification time and reduce the mechanical strength; adding too little water will affect the filling effect of the construction and the uniformity of the material texture.
Rongsheng Refractory Plastic Manufacturer
Rongsheng Refractory Plastic Manufacturer is a powerful manufacturer of amorphous refractory materials. Rongsheng’s amorphous refractory products include high-aluminum refractory castables, wear-resistant refractory castables, high-chromium refractory castables, refractory ramming materials, refractory plastics, etc. For the supply and solutions of integral refractory lining materials, contact Rongsheng for a free quote now!
