In our daily life, salt is an indispensable condiment and a necessity to maintain the normal physiological functions of the human body. So, where does the salt we usually eat come from?Let's find out the story behind this.
First of all, the ** of salt can be roughly divided into three**.
1. Sea salt. Sea salt is made by harvesting seawater, going through processes such as sunlight, evaporation, and crystallization. The steps for mining sea salt are as follows:
1. Collect seawater: Seawater is the raw material for the production of sea salt, and it is usually collected in the sea area with pure water quality.
2. Evaporation concentration: The collected seawater is placed in a shallow salt pond or artificial evaporator, and solar energy is used for evaporation, so that the water in the seawater is gradually evaporated and concentrated into high-salinity brine.
3. Crystallization and precipitation: The concentrated brine is placed in the salt pan or salt pond to further evaporate the brine and crystallize and precipitate the sodium chloride in it.
2. Mineral salt is mined from salt ore.
1. Dig the shaft and underground roadway to reach the ore layer, so that the underground and the ground form a complete transportation, ventilation and other systems, and directly extract rock salt from the underground.
2. Crushing: The mined salt ore needs to be crushed by a crusher for primary crushing to make it into small pieces suitable for processing.
3. Milling: The crushed salt ore needs to be further ground in order to make salt products of different particle sizes.
4. Selection: After grinding, salt ore may contain impurities. Therefore, selection is required to separate the impurities to obtain a pure salt product.
5. Packaging: Finally, the selected salt products need to be packaged for storage and transportation.
3. Collection of lake salt and well salt.
Lake salt and well salt are collected differently than sea salt. Lake salt mainly comes from inland salt lakes or saltwater lakes, such as the green salt of Qinghai Lake is a typical lake salt. Well salt is prepared by drilling and dissolving the underground salt layer by water injection, and then by evaporating the brine. The well salt of Zigong, Sichuan is a famous well salt production area in China.
Secondly, salt plays an important role in our daily lives. It is an essential condiment in cooking, adding texture and flavor to food. At the same time, salt is also one of the essential minerals for the human body, which is essential for maintaining the normal physiological functions of the human body. The sodium and chloride ions in salt are involved in a variety of physiological reactions in the human body, such as maintaining blood pressure and regulating water balance. However, excessive salt intake can also cause negative health effects, such as chronic diseases such as high blood pressure. Therefore, proper salt intake is essential to maintain good health.
In addition, in addition to being a condiment and a necessity for maintaining physiological functions, salt has many other uses. Industrially, salt is used to make products such as glass, paper, soap, etc. In the medical field, salt can be used for disinfection, antiseptic, certain diseases, etc. In addition, salt is also widely used in food processing, water treatment, etc. It can be said that salt is ubiquitous in our lives and brings great convenience to our lives.
In short, the salt we usually eat comes from nature's gifts. Whether it is sea salt, rock salt, well salt or lake salt, it is formed after hundreds of millions of years of natural precipitation and human technology processing. Let's cherish this precious resource given to us by nature and create a better life together!