In many industrial production scenarios, high temperature environments are common but highly challenging. Whether it is the raging flames during steel smelting, high-temperature furnaces in glass manufacturing, or high-temperature reactors in chemical production, strict requirements are placed on the high-temperature resistance of materials. There is a material that plays a crucial role in these high-temperature fields and cannot be ignored, which is silicon carbide heat-resistant blocks.
Silicon carbide, from a chemical composition perspective, is a compound composed of two elements: silicon (Si) and carbon (C). Despite having the word ‘silicon’ in its name, its appearance is very different from the silicon materials we see in our daily lives. Silicon carbide usually appears as black or green crystals, with a hard texture and high hardness. When used to scratch glass, it will easily leave marks on the glass, just like cutting butter with a small knife.
The reason why silicon carbide heat-resistant blocks can stand out in high temperature environments is due to their series of excellent properties. Firstly, it has ultra-high temperature resistance, with a very high melting point, which means it can remain stable in general high-temperature industrial environments and will not easily soften, deform, or melt. When the temperature inside the steel smelting furnace skyrockets, other materials may have already begun to “bear the burden”, but silicon carbide heat-resistant blocks can “stay still” and steadily shoulder the responsibility of protecting the furnace body and maintaining production.
The chemical stability of silicon carbide heat-resistant blocks is also very excellent. It has good resistance to various chemical media, and it is difficult for strong corrosive acids or alkaline substances to cause damage to it. In chemical production, various corrosive chemicals are often encountered. Using silicon carbide heat-resistant blocks as the lining of reaction equipment can effectively prevent equipment from being corroded, extend equipment service life, and reduce production costs.
In addition to the above properties, silicon carbide heat-resistant blocks also have good wear resistance and high strength. In some high-temperature environments with material erosion, such as cyclone separators and calcination furnaces in cement plants, silicon carbide heat-resistant blocks can reduce losses caused by material friction due to their wear-resistant properties, ensuring the normal operation of equipment. Its high strength enables it to withstand certain pressure and impact forces, maintaining structural integrity in complex industrial environments.
Silicon carbide heat-resistant blocks are widely used in the industrial field. In the steel industry, it is widely used in equipment such as blast furnaces and hot blast stoves. Inside the blast furnace, high-temperature molten iron and slag have extremely high requirements for lining materials. Silicon carbide heat-resistant blocks, with their high temperature resistance and erosion resistance, have become an ideal choice for lining materials, effectively extending the service life of the blast furnace and improving the efficiency and quality of steel production. In the hot blast furnace, silicon carbide heat-resistant blocks serve as heat storage bodies, which can efficiently store and release heat, providing high-temperature hot air for the blast furnace and improving energy utilization efficiency.
In the non-ferrous metal smelting industry, such as the smelting process of aluminum, copper and other metals, silicon carbide heat-resistant blocks are also indispensable. The melting temperature of these metals is relatively high, and various corrosive gases and slag are generated during the melting process. Silicon carbide heat-resistant blocks can adapt well to such harsh environments, protect furnace equipment, and ensure the smooth smelting of non-ferrous metals.
Silicon carbide heat-resistant blocks also have important applications in the ceramic and glass industries. Ceramic firing needs to be carried out in high-temperature kilns. Kilns made of heat-resistant silicon carbide blocks, such as shed boards, boxes, etc., can not only withstand high temperatures, but also ensure the stability and uniformity of ceramic products during the firing process, which helps to improve the quality of ceramic products. In glass melting furnaces, silicon carbide heat-resistant blocks are used for lining and heat storage chambers, which can withstand the high temperature erosion and scouring of glass liquid, while improving the thermal efficiency of the furnace and reducing energy consumption.
With the continuous advancement of technology and the sustained development of industry, the application prospects of silicon carbide heat-resistant blocks will be even broader. On the one hand, researchers are constantly exploring new preparation processes and technologies to further enhance the performance of silicon carbide heat-resistant blocks and reduce production costs. For example, by adopting a new sintering process, the density and structure of silicon carbide heat-resistant blocks can be increased, thereby improving their overall performance. On the other hand, with the rapid rise of emerging industries such as new energy and aerospace, the demand for high-temperature resistant materials is also increasing, and silicon carbide heat-resistant blocks are expected to play a greater role in these fields.
Post time: Sep-02-2025