Based on the source of salt can be divided into: sea salt, lake salt (pool salt), well salt, mineral salt (rock/rock salt) four categories. From the point of view of distribution, China's eastern coast produces sea salt; the western region of the arid climate, more saltwater lakes, producing lake salt; the central region due to crustal movement, more geological history of the formation of the rock salt mines, that is, more well mine salt.

Sea salt is made from seawater (in the north, there is the use of underground brine) as raw materials. Seawater through the tide into the evaporation pool, the sun evaporation and concentration made of saturated brine, in the crystallization pool continue to evaporate and crystallize, and then after artificial or mechanical salt collection, pile pile to complete the production. Sea salt is low in sodium chloride, contains a variety of trace elements needed by the human body, and does not add any anti-caking agent.

Well salt is made by drilling wells to extract underground brine salt is called well salt. Mineral salt, as the name suggests, is salt mined from salt mines, like rock salt in the desert, Sichuan salt, Poland from hundreds of meters underground mining salt, mineral salt is rich in minerals.

Lake salt generally refers to green salt. Green salt, is a halide type rock salt family lake salt crystals, is directly extracted from the salt lake salt and salt lake brine as raw material in the salt field in the tanning system made of salt. Mainly contains sodium chloride, secondary trace elements of silicon, iron, aluminum and macroelements calcium, magnesium, and a small amount of trace elements of manganese, titanium, strontium.

China's three major salt farms are sea salt farms, respectively, Changlu Salt Farm, Bubu Salt Farm, Yingge Salt Farm. Among them, Changlu Salt Farm is located in the Bohai Sea, which is the largest salt farm in China, while Buyeo Salt Works and Yingge Salt Farm are located in Taiwan Island and Hainan Island respectively.

Introduction of salt:

Salt (table salt) is sodium chloride (NaCl). However, from a chemical point of view, salt can be more than sodium chloride, which refers to a class of compounds in which metal ions or ammonium ions (NH4+) combine with acid ions or non-metal ions.

Different ions combined into a very wide variety of salt, and some of the ions (for example: potassium K +, calcium Ca2 +, sodium Na +, magnesium Mg2 +, iron Fe2 +, etc.) composed of salt? We call it inorganic salts, also called minerals, mineral salts.

In China's geographic distribution, sea salt in the east, well salt in the center, and lake salt in the west, and the towns and cities that have sprung up because of salt run through the east, west, and north. Yancheng in Jiangsu Province, Zigong in Sichuan Province, and Yuncheng in Shanxi Province are representatives of sea salt, well salt, and lake salt, respectively.

Refer to Baidu Encyclopedia-Salt for the above