Refractory ceramic goods; containing by weight more than 50% of alumina or of a mixture or compound of alumina and of silica, excluding those of siliceous fossil meals or similar earths

HS v2017 Code: 690320

About refractory ceramic goods; containing by weight more than 50% of alumina or of a mixture or compound of alumina and of silica, excluding those of siliceous fossil meals or similar earths

HS code 690320 covers a critical category of refractory ceramic goods that are essential for various industrial processes. These specialized materials, containing more than 50% alumina or a mixture of alumina and silica, play a vital role in high-temperature applications across sectors such as steel production, glass manufacturing, and chemical processing. Their ability to withstand extreme heat and maintain structural integrity makes them indispensable in the global economy.

Production process

The production of HS 690320 refractory ceramic goods typically involves a multi-step process. First, the raw materials, including alumina, silica, and various mineral additives, are carefully selected and measured. These components are then thoroughly mixed and homogenized. The mixture is then shaped into the desired form, often through pressing or extrusion techniques. Finally, the shaped pieces undergo a high-temperature firing process, which fuses the materials and imparts the necessary refractory properties.

Production inputs

The key inputs for the production of HS 690320 refractory ceramic goods include high-purity alumina, silica, and various mineral additives such as 251110 Kaolin, 252100 Limestone, and 252910 Magnesite. Specialized equipment, such as mixing machines, presses, and high-temperature kilns, are also essential for the manufacturing process.

Production outputs

The primary outputs of HS 690320 refractory ceramic goods are used in a wide range of industrial applications, including 720230 Ferroalloys, 700100 Glass, and 281410 Ammonia. These refractory materials help maintain the structural integrity and thermal efficiency of critical industrial equipment, enabling the production of essential goods and materials across various sectors.

Revisions to 690320

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 690320. The most recent 1 version of this code (690320) is in the HS v2022 system:

This page shows a legacy version of code 690320 ( HS v2017).

Family tree for refractory ceramic goods; containing by weight more than 50% of alumina or of a mixture or compound of alumina and of silica, excluding those of siliceous fossil meals or similar earths

    graph LR
    A["<a href='/classifications/hs/v2017/69'>69: Ceramic products</a>"]
A --> B["<a href='/classifications/hs/v2017/6903'>6903: Ceramic goods; (e.g. retorts, crucibles, muffles, nozzles, plugs, supports cupels, tubes, pipes, sheaths, rods) excluding those of siliceous fossil meals or of similar siliceous earths</a>"]
B --> C["<a href='/classifications/hs/v2017/690320'>690320: Refractory ceramic goods; containing by weight more than 50% of alumina or of a mixture or compound of alumina and of silica, excluding those of siliceous fossil meals or similar earths</a>"]

    B --> D["<a href='/classifications/hs/v2017/690310'>690310: Refractory ceramic goods; containing by weight more than 50% of graphite or other forms of carbon or of a mixture of these products, excluding those of siliceous fossil meals or similar earths</a>"]
B --> E["<a href='/classifications/hs/v2017/690390'>690390: Refractory ceramic goods; composition of which n.e.c. in heading no. 6903, other than those of siliceous fossil meals or similar earths</a>"]

    

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