Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods; containing by weight more than 50% of alumina (Al2o3), of silica (SiO2) or of a mixture or compound of these

HS code 690220 covers a crucial category of refractory ceramic materials used extensively in the construction, manufacturing, and industrial sectors. These specialized products, which contain high concentrations of alumina, silica, or a combination thereof, are essential for withstanding extreme temperatures, corrosive environments, and demanding applications. As a key component of the broader refractory industry, this classification plays a vital role in supporting the infrastructure, production capabilities, and technological advancements across a diverse range of industries.

The production of the refractory bricks, blocks, tiles, and similar goods covered under HS code 690220 typically involves a multi-step process. It begins with the careful selection and blending of raw materials, such as alumina, silica, and various mineral additives, to achieve the desired chemical composition and physical properties. The mixture is then subjected to high-temperature firing or sintering, which fuses the components and imparts the necessary strength, thermal resistance, and durability. Depending on the specific application, the final products may undergo additional shaping, cutting, or surface finishing to meet the required specifications.

The key inputs for the production of HS code 690220 goods include high-purity alumina, silica, and other refractory minerals. Specialized machinery, such as mixing equipment, kilns, and molding or extrusion systems, are also essential for the manufacturing process. Additionally, energy sources, such as natural gas or electricity, are required to facilitate the high-temperature firing and sintering stages.

The refractory bricks, blocks, tiles, and similar goods classified under HS code 690220 are primarily used in the construction of furnaces, kilns, and other high-temperature industrial equipment. They find applications in the 6902 Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, 6901 (Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less), and 6903 (Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths and rods), other than those of siliceous fossil meals or of similar siliceous earths) industries, among others.