Crude salt is mined from underground salt domes or recovered from open-pit mines. The extracted salt is initially in large chunks or crystals and undergoes various processing stages to refine it. This includes crushing it into smaller particles, washing to eliminate impurities, and drying to reduce moisture content.
The purity of crude salt varies depending on the location and geological conditions of the salt deposit. Some crude salt deposits can contain high levels of impurities, including minerals, sand, and clay, while others may be cleaner.
Crude salt is primarily used as a seasoning agent in food, but it also has various industrial applications. It is employed in preserving food, producing chemicals like chlorine and sodium hydroxide, and preventing ice formation on roads and walkways during winter.
To obtain edible table salt, crude salt goes through additional refining processes to enhance its purity, remove impurities, and add anti-caking agents to prevent clumping. The refining process may involve further washing, drying, sieving, and blending with additives like iodine or fluoride to improve its nutritional value.
It is important to note that while crude salt provides essential minerals, excessive consumption of salt, regardless of its form, can lead to adverse health effects such as high blood pressure, kidney problems, and fluid retention. Therefore, moderation and following recommended daily intake guidelines are crucial when using crude salt or any form of salt in culinary applications or dietary practices.