Salt is an indispensable condiment in human life and an important chemical raw material. The main component of table salt is sodium chloride, and its refining methods are mainly as follows:
1.Sea water salt
Solar energy is used to evaporate seawater to make salt analysis.
This is the oldest and most economical method of salt production, and it is suitable for seaside areas.
The main steps include:
Bringing seawater into the salt pans.
Exposure to concentrated brine.
Collect the crystallized salts.
2.Well salt mining
Mining of underground rock salt or extraction of underground brine.
It is suitable for areas with abundant salt deposits underground.
The main steps include:
Digging salt wells or mining.
Dissolve rock salt or purify brine.
Evaporation crystallization. 3.Lake salt extraction
Salt is produced from the brine in the lake.
Suitable for use in salt lake areas.
The main steps include:
Divert water from the lake into the salt pond.
Exposure to concentrated brine.
Collect the crystallized salts.
4.Rock salt purification
Rock salt is crushed, dissolved and purified by sodium chloride.
Suitable for rock salt mining areas.
The main steps include:
Mining rock salt. Crush and dissolve rock salt.
Purification, crystallization.
Summary:
The refining methods of edible salt mainly include seawater salt, well salt mining, lake salt extraction and rock salt purification. Different methods have their own advantages and disadvantages, and are suitable for different regions and conditions.