Refractory ceramic goods; composition of which n.e.c. in heading no. 6903, other than those of siliceous fossil meals or similar earths

HS code 690390 covers a diverse range of refractory ceramic goods that are not classified elsewhere in heading 6903. These specialized materials are essential for industries that require high-temperature resistance, such as steel production, glass manufacturing, and certain chemical processes. As a key component in the infrastructure of many industrial sectors, the 690390 product category plays a vital role in the broader global economy.

Refractory ceramic goods under HS code 690390 are typically produced through a combination of mining, refining, and high-temperature firing processes. Raw materials, such as clays, minerals, and synthetic compounds, are carefully selected and blended to achieve the desired chemical composition and physical properties. The mixture is then formed into the desired shape, often through extrusion, pressing, or casting, before being fired at extremely high temperatures to fuse the materials and impart the necessary refractory characteristics.

The main inputs for the 690390 industry include a variety of raw materials, such as 2508 Natural clays, 2509 Chalk, 2510 Natural calcium phosphates and natural aluminum calcium phosphates, and 2511 (Natural barium sulfate (barytes); natural barium carbonate (witherite)). Additionally, specialized machinery and equipment, such as high-temperature kilns and precision molding tools, are essential for the production of these refractory ceramic goods.

The refractory ceramic goods classified under HS code 690390 are primarily used as inputs for other industries, such as 7201 Pig iron and spiegeleisen in pigs, blocks or other primary forms, 7202 Ferro-alloys, and 7203 Ferrous products obtained by direct reduction of iron ore and other spongy ferrous products, in lumps, pellets or similar forms; iron having a minimum purity by weight of 99.94%, in lumps, pellets or similar forms. These refractory materials help to ensure the efficient and safe operation of high-temperature industrial processes, contributing to the overall productivity and competitiveness of the global economy.