In my country's thermal power plants, the flue gas ducts contain large amounts of acidic gases and hard particles, causing severe corrosion and wear on the ducts and related components. This not only necessitates frequent repairs and replacements of metal materials, leading to constant maintenance, but also seriously affects the safe operation of the power plant. In 1995, at a power plant in North China, severe thinning of the flue gas duct's metal wall due to wear and corrosion resulted in the fatal fall of an operator into the operating flue. To improve the service life of flue gas ducts and dust collectors, methods such as bonding cast stone slabs or applying cast stone powder mixed into adhesives have been used, but the results have been less than ideal. Therefore, improving the wear and corrosion resistance and service life of thermal power plant flue gas ducts and dust collectors has always been a crucial task for power plants. Epoxy resin possesses high bonding strength and good chemical properties; through modification and the addition of various fillers, it can achieve various desired wear and corrosion resistance properties and other characteristics. This work involves adding wear-resistant and corrosion-resistant fillers to the commonly used epoxy resin in my country to form a two-component putty-like substance. In particular, the addition of modifiers enhances its bonding strength with the matrix, as well as its resistance to erosion and corrosion. [b]I. Experimental Conditions[/b] The experiment was conducted on four large cones approximately 30 meters above the dust collector in the flue gas duct of boiler #11 at the Datong Power Plant. The cones were originally made of ordinary carbon steel plates, approximately 10 mm thick. Due to the presence of a large amount of acidic gas and hard particles in the conveying medium, their average service life was only six months, requiring frequent replacement. The inner surface area of ​​each cone is approximately 15 m². [b]II. Physicochemical and Mechanical Properties of the Putty[/b] The putty is a two-component substance, with a modifier added to component A. The mechanical properties of the mixed components were determined according to standard test methods. The main performance indicators are as follows: Density: 2.15 g/cm3 Tensile strength: 50.5 MPa Hardness (HRB): 90.8 Compressive strength: 116.5 MPa Maximum operating temperature: 170℃ Wear resistance: 1 to 1.5 times that of tempered steel Corrosion resistance: No change in 73% NaOH solution within one month; no change in 90℃ and 30% H2SO4 solution for 24 hours [b]III. Construction Process[/b] After the new cone is welded during power plant maintenance, it will be carried out on site. The specific construction process is as follows: 1. Use an angle grinder to perform simple cleaning of the construction surface to remove loose rust and oil stains. To ensure strong adhesion of the adhesive, surface cleaning is essential. The cleaner and appropriately roughened the surface, the higher the adhesion strength. Due to the large area of ​​this cone, thorough cleaning is difficult, so only simple cleaning can be performed. 2. Weld a 20×20 mesh wire mesh onto the inner surface of the cone using coarse iron wire. 3. First, mix unfilled epoxy resin of the same composition with a hardener and brush it onto the surface. Due to the low temperature during construction and the high viscosity of the putty, direct bonding is difficult. Therefore, a thinner unfilled epoxy resin of the same composition must be used as a base coat to ensure a strong bond. 4. Mix the putty thoroughly at a 2:1 ratio and apply it to the repair surface. Due to the low temperature during construction, soften component A by heating before mixing. The mixed putty should be used within half an hour. Due to the high viscosity of the putty, although the repair area is the inner surface of an inverted cone, it can still be applied vertically and to ceilings, and a single coat thickness can reach 10mm. To ensure the average lifespan of the putty, apply different thicknesses to different areas, with a thicker layer for severely worn or corroded areas. The putty can be used within five hours after application. [b]IV. Experimental Results and Conclusions[/b] The total construction area using the above process was approximately 60m². From its commissioning in mid-October 1995 to November 1996, inspection revealed that the coating remained intact, with no peeling or flaking. The average wear was less than 1mm. However, the steel plates at the interface with the adhesive layer showed more severe wear and corrosion. Based on this, it is estimated that an average 10mm adhesive layer can be used for at least 5 years, meaning the service life can be increased by at least eight times. The application of wear-resistant and corrosion-resistant mortar significantly improved the service life of the components, saving considerable manpower and time during major overhauls, as well as a significant amount of steel plate material. Therefore, the factory has decided to apply this wear-resistant and corrosion-resistant mortar to all elbows and cones during future maintenance, and to apply it to other similar working conditions, including various elbows and fan casings, to increase the service life of these components and reduce maintenance workload.