Quicklime, slaked lime and hydraulic lime

cpc code 37420 covers the production of quicklime, slaked lime, and hydraulic lime. These materials are essential inputs for a wide range of industries, including construction, steel manufacturing, and water treatment. They play a crucial role in the broader economy, enabling the production of essential goods and infrastructure that support economic growth and development.

The production of quicklime, slaked lime, and hydraulic lime involves the thermal processing of limestone or other calcareous materials. The key steps include quarrying and crushing the raw materials, heating them in a kiln to drive off carbon dioxide, and then processing the resulting calcium oxide (quicklime) into the desired products. Slaked lime is produced by adding water to quicklime, while hydraulic lime is created by adding other materials, such as clay, to the limestone before heating.

The main inputs for this industry are limestone, dolomite, and other calcareous raw materials. Producers also require specialized kilns, grinding equipment, and other machinery to extract, process, and refine the lime products. Energy, in the form of heat or electricity, is another critical input for the thermal processing involved in lime production.

The primary outputs of this industry are quicklime, slaked lime, and hydraulic lime. These materials are then consumed by a variety of other industries, such as 37300 Glass and glass products, 37100 Cement, lime and plaster, and 38100 Iron and steel basic industries. Lime products are also used in water treatment, agriculture, and various chemical processes.