The process of making seawater salt mainly consists of the following steps:
1.Seawater Collection: Seawater is first collected, which is usually done by opening dams or taking advantage of the natural flow of the tides.
2.*Pretreatment**: The collected seawater is preliminarily filtered to remove larger impurities, such as seaweed, small fish, etc.
3.*Concentration**: The pre-treated seawater is introduced into the evaporation pond, and the water in the seawater is gradually evaporated and the salt concentration increases through the irradiation of sunlight and the evaporation of the wind.
4.*Crystallization**: When the salt concentration of seawater reaches a saturated state, the salt begins to crystallize. This process is usually carried out in a crystallization pond with a shallow depth to facilitate observation and collection of crystallization salts.
5.*Harvest**: The crystallized salt grains are deposited at the bottom of the crystallization pond and can be harvested. Workers use tools to scrape the salt grains from the bottom of the pool, then dry and air dry them to remove excess water.
6.*Refining**: The raw salt harvested may also contain some impurities that need to be further washed, screened, and refined to improve the purity and quality of the salt.
7.*Packaging & Sales**: Finally, the refined salt grains are packaged into products of different specifications and then sold to consumers.
The whole process of making seawater salt is a combination of natural and artificial, relying on natural resources such as solar and wind power, as well as manual operation and maintenance. Through this process, we are able to obtain salt for edible, industrial, and other uses.