Dolomite, calcined or sintered; including dolomite roughly trimmed, or merely cut by sawing or otherwise into blocks or slabs of rectangular (including square) shape

HS code 251820 covers dolomite, a type of sedimentary rock composed primarily of the mineral dolomite. Dolomite is a versatile material with a wide range of industrial applications, including as a flux in steel production, a filler in the manufacture of plastics and rubber, and a source of magnesium. The dolomite industry plays a crucial role in supporting various sectors of the global economy, from construction and infrastructure to automotive and consumer goods.

The production of dolomite classified under HS code 251820 typically involves several key steps. First, dolomite is extracted from quarries or mines through blasting, drilling, or other mechanical methods. The raw dolomite is then crushed, screened, and sorted to achieve the desired particle size and purity. In some cases, the dolomite may be further processed through calcination or sintering, which involves heating the material to high temperatures to alter its chemical and physical properties.

The main inputs required for the production of dolomite under HS code 251820 include the raw dolomite rock, as well as various types of machinery and equipment for mining, crushing, and processing the material. Energy sources, such as electricity or fossil fuels, are also necessary to power the production facilities. Additionally, labor, transportation, and other supporting infrastructure are critical inputs for this industry.

The primary output of the dolomite industry classified under HS code 251820 is the processed dolomite material, which can be used in a variety of applications. Some of the key consumers of dolomite include the 720110 Iron and non-alloy steel in ingots or other primary forms, 681011 Building blocks and bricks of cement, concrete or artificial stone, and 400599 Compounded rubber, unvulcanized, in primary forms or in plates, sheets or strip. Dolomite may also be used in the production of 283699 Other inorganic compounds, n.e.c.; liquid air; compressed air; amalgams, other than of precious metals, such as magnesium compounds.