In the vast world of industrial production, many key links cannot do without the support of high-performance materials. Today, we will introduce a material that plays an important role in traditional industries such as kilns and desulfurization systems – reaction sintered silicon carbide ceramics.
What is silicon carbide ceramic?
Silicon carbide ceramic is an advanced ceramic material composed of silicon and carbon. It is not an ordinary ceramic, but a “metamaterial” with numerous excellent properties. It has the characteristics of high temperature strength, good wear resistance, low coefficient of thermal expansion, high hardness, and chemical corrosion resistance, which make it stand out among many materials.
Reaction sintered silicon carbide ceramics are a special type of silicon carbide ceramics, and their preparation process is very unique – first, fine particles of alpha SiC and additives are pressed into a green body, and then contacted with liquid silicon at high temperature. At this point, the carbon in the blank undergoes a wonderful chemical reaction with the infiltrated Si, generating β – SiC and tightly bonding with α – SiC. At the same time, free silicon fills the pores, ultimately obtaining a highly dense ceramic material.
The cornerstone in the kiln
Reaction sintering of silicon carbide ceramics is an indispensable and important role in various high-temperature kilns. For example, in ceramic production kilns such as roller kilns, tunnel kilns, shuttle kilns, etc., it is made into key components such as nozzle sleeves, crossbeam rollers, and cold air pipes.
The flame nozzle sleeve can effectively control the temperature balance inside the kiln. It has the characteristics of high temperature strength, oxidation resistance, wear resistance, and resistance to rapid cooling and heating. It will not break or deform after long-term high temperature use, ensuring a stable temperature environment in the kiln. It is crucial for firing high-quality ceramic products.
The crossbeam rollers and cold air ducts respectively bear important responsibilities for support and ventilation. The crossbeam roller has the characteristics of good thermal stability, oxidation resistance, and high-temperature creep resistance. It is not easy to deform and bend after long-term use at high temperatures, ensuring the stability of the internal structure of the kiln and smooth material transportation. The cold air duct is responsible for regulating the gas flow and temperature distribution inside the kiln, ensuring the normal operation of the kiln.
From the perspective of customized parts, reaction sintered silicon carbide has obvious advantages in the production of kiln components. Due to its almost unchanged size before and after sintering, it can be processed into any shape and size after molding. Kiln manufacturers can customize various shapes and specifications of components according to different kiln designs and production needs, meeting the production requirements of large-scale and complex shaped products, which is difficult for other materials to achieve.
Robust defense line of desulfurization system
In the field of environmental protection such as power plant desulfurization, reaction sintered silicon carbide ceramics also play a key role, mainly reflected in the key component of desulfurization nozzles. The flue gas emitted from power plants contains a large amount of pollutants such as sulfur dioxide, and desulfurization nozzles are important tools for removing these pollutants.
The reaction sintered silicon carbide desulfurization nozzle has excellent properties such as high strength, high hardness, strong corrosion resistance, wear resistance, and high temperature resistance. It has an extraordinary service life under harsh conditions, which is incomparable to ordinary materials. The commonly used types of desulfurization nozzles include spiral nozzles and vortex nozzles, which have different designs and working principles, but can efficiently atomize the desulfurizer and fully contact it with the flue gas, thereby achieving good desulfurization effect.
Through the unique structural design, the spiral nozzle makes the liquid in the outer layer hit the spiral surface at a certain angle on the nozzle, changes the spraying direction and leaves the nozzle, forming a solid conical fog field, which can provide a variety of spray angles, and still has high absorption efficiency under the lowest pressure. The vortex nozzle allows slurry to enter the swirl chamber of the nozzle from the tangent direction, and then eject from the orifice at right angles to the inlet direction. The spray is small and uniform, and the vortex channel is large, which is not easy to block.
For customized parts of desulfurization systems, reaction sintered silicon carbide can customize the most suitable nozzle shape, size, and spray characteristics according to different desulfurization processes, flue gas flow rates, concentrations, and other parameters, ensuring efficient and stable operation of the desulfurization system and meeting increasingly stringent environmental requirements.
Reaction sintered silicon carbide ceramics play an irreplaceable role in traditional industrial fields such as kilns and desulfurization systems due to their unique properties and customizable advantages. They provide a solid guarantee for the efficient, stable, and environmentally friendly operation of industrial production and inject strong impetus into the technological upgrading and development of traditional industries.
Post time: Jun-07-2025