Silicates; sodium metasilicates

HS code 283911 covers the classification of silicates, including sodium metasilicates. Silicates are a broad class of chemical compounds that play a vital role in various industries, from construction and glass manufacturing to detergents and ceramics. As a key component in many essential products, the silicates industry is an integral part of the global economy, contributing to the development and advancement of numerous sectors.

The production of silicates, such as sodium metasilicates, typically involves the reaction of silicon dioxide (SiO2) with various alkali metal oxides, such as sodium oxide (Na2O). This process, known as the fusion method, involves heating the raw materials to high temperatures, often in a furnace, to facilitate the chemical reaction and produce the desired silicate compound. The resulting molten mixture is then cooled and solidified, often into a glassy or crystalline form, before being further processed and refined for various applications.

The main inputs required for the production of silicates and sodium metasilicates include silicon dioxide (sand or quartz), sodium oxide (typically obtained from sodium carbonate or sodium hydroxide), as well as various energy sources, such as electricity or natural gas, to power the high-temperature fusion process. Additionally, specialized equipment, such as furnaces, reactors, and cooling systems, are essential for the efficient and controlled production of these silicate compounds.

The primary outputs of the silicates industry, as covered by HS code 283911, are various forms of silicates, including sodium metasilicates. These compounds find widespread use in a variety of industries, such as 282520 Lime and cement for construction, 701000 Glass and glassware manufacturing, 340220 Cleaning preparations and detergents, and 691000 Ceramic products. The versatility of silicates makes them an essential component in many everyday products and industrial applications.