Thread Content
When it comes to refractory materials, people generally think of their ability to resist high temperatures, not softening or melting under such conditions. However, it is now defined that any material whose physicochemical properties permit its use in high-temperature environments is referred to as a refractory material. As one of the important refractory raw materials today, brown corundum has become indispensable in the refractory materials industry. Next, let the editors from Chijia Xinnai Materials explain in detail the practical properties of brown corundum! Choosing a good manufacturer means choosing high-quality brown corundum! The reasons for the extreme fluctuations in the market for brown corundum lie in the more refined production of abrasives. In previous years, abrasives produced in China were of rough quality and were used as raw materials by foreign manufacturers; therefore, the technical requirements were not very high. However, in recent years, the brown corundum F-grade sand required by some international companies is not as simple as we thought – they have increasingly strict requirements regarding the quality of the sand. If it is to be used as part of the final products for foreign customers, then the technical requirements are even higher! As for the requirements for exporting brown corundum abrasives, the end-users are quite demanding. During production in China, wooden tools such as sieve frames are often used, which can result in the presence of wood chips and dust. Although this is common in China, it is unacceptable to foreign customers, who have very high standards when it comes to cleanliness. Indeed, the final products of some large international companies contain no wood chips or dust. This is why, despite poor sales of brown corundum F-grade sand in the past couple of years, some companies had to suspend production, while others faced a shortage of such sand. Not sure how to choose abrasives and refractory materials? Turn to Qianjiaxin Refractories for expert guidance! Brown corundum is commonly used in refractory materials for aggregates and fine powders. Its advantages include high fire resistance, strong wear resistance, corrosion resistance, high bulk density, and a high alumina content; it is mainly used in high-alumina and alumina-based systems. The products also exhibit a high load softening temperature and good volume stability at high temperatures. However, the impurities in brown corundum determine the lifespan of the product during use. Since impurities have not been completely removed during the melting process, brown corundum also contains subcrystalline phases such as calcium aluminate, plagioclase, spinel, and rutile, as well as a glassy phase, ferroalloys, and solid solutions. Qianjia Xinnai Refractories Factory broke away from traditional manufacturing methods by being the first to adopt secondary refining technology on an industrial scale, thereby completely eliminating the problem of brown corundum powder explosion during the use of refractory materials. It is applicable not only to ordinary casting materials and products fired at low temperatures, but also meets the requirements for stability in products such as high-temperature sintered corundum bricks and permeable bricks. Currently, the company is working in collaboration with Wuhan University of Science and Technology and the High-Temperature Materials Research Institute of Hokkaido University to develop a new type of electrocalcium aluminate multiphase corundum (for steel ladles and storage tanks), utilizing new energy-saving and reducing agents to truly achieve sustainability, environmental protection, energy efficiency, and high performance in the field of refractory metallurgy. When choosing brown corundum abrasives, we need to conduct a comprehensive analysis and take all factors into consideration, and use the abrasives appropriately based on their characteristics, so as to select those that are suitable for us. I hope the above information will be helpful to everyone!