Introduction: With the continuous advancement of industrial technology, the refractory materials industry is experiencing a new round of technological upgrades. Recently, new materials such as magnesia-calcia sand, fused white corundum, and magnesium-aluminum spinel are being increasingly applied in high-temperature industries, becoming key forces driving industry development. Body: In recent years, refractory materials, as an essential basic material for high-temperature industries such as steelmaking, metallurgy, and glass, directly affect production efficiency and product quality. In this context, high-performance materials such as magnesia-calcia sand, fused white corundum, and magnesium-aluminum spinel have gradually become the focus of market attention. Magnesia-calcia sand is widely used in the linings of high-temperature equipment such as blast furnaces and converters due to its excellent thermal shock resistance and chemical stability. It can effectively resist the erosion of high-temperature slag, extend the service life of equipment, and reduce maintenance costs. At the same time, magnesia-calcia sand also has good sintering properties, which help improve the overall structural strength of refractory materials. Fused white corundum is known for its high purity, high density, and excellent wear resistance, and is commonly used in the manufacture of high-precision refractory bricks and special refractory products. Due to its melting point of up to 2050°C, fused white corundum exhibits excellent stability in high-temperature environments, especially suitable for fields such as steelmaking and non-ferrous metal smelting where refractory materials are required to be highly demanding. Magnesium-aluminum spinel, as a composite oxide material, combines the advantages of magnesite and bauxite, and has excellent alkali resistance, thermal shock resistance, and high-temperature strength. In recent years, with the improvement of environmental protection standards, the application of magnesium-aluminum spinel in the field of green refractory materials has been continuously expanding, becoming an important choice for replacing traditional materials. Industry insiders stated that with the continuous deepening of national energy-saving and emission reduction policies, the refractory materials industry is accelerating its transformation towards high performance and low pollution. The research and application of new materials such as magnesia-calcia sand, fused white corundum, and magnesium-aluminum spinel not only enhance the comprehensive performance of refractory materials, but also provide strong support for the sustainable development of related industries. Conclusion: The extensive application of new materials such as magnesia-calcia sand, fused white corundum, and magnesium-aluminum spinel marks that China's refractory materials industry is steadily moving towards high quality and high efficiency. In the future, with continuous technological breakthroughs and sustained growth in market demand, these high-performance materials will play an important role in more fields, helping China's manufacturing industry to reach a higher level.