1. Pour the crude salt into special refining equipment, usually a large container or evaporator.

This equipment crystallizes and dissolves the crude salt by heating; And allowed to stand for a period of time to allow crystals to form. With the change of temperature and the evaporation of water, the crystals began to condense and gradually became fine and pure salt crystals.

2. Take the crystal out of the equipment, and generally use equipment such as screen or filter to separate it.

This can effectively separate impurities deposited at the bottom or suspended in the solution from salt crystals. Through repeated screening and washing, the purity of the finally obtained salt crystals can be ensured to be high.

3. Put the salt crystals into a drying device to remove water.

It is very important to remove water, because water will cause salt crystals to agglomerate during packaging. It is necessary to properly control the temperature of the drying equipment to ensure that the salt crystals are completely dried, and to avoid the unnecessary influence of excessive temperature on the salt crystals.

4. The refined salt can be sold after necessary testing and packaging.

These steps include detailed inspection of the chemical composition, purity and appearance of the salt to ensure that the quality of the salt meets the standards. Then, the fine salt is put into various packaging bags and sealed for storage to keep the salt fresh and hygienic.

To sum up, refining crude salt into refined salt is a complex and delicate process. Through heating crystallization, impurity separation, drying, packaging and other steps, high-quality edible refined salt is finally obtained. This process not only improves the purity and quality of salt, but also ensures food safety and the health of consumers.

Extended data

In chemistry, salt refers to a metal ion or ammonium ion (NH? +) Compounds combined with acid radical ions, such as calcium sulfate, copper chloride and sodium acetate, generally speaking, salts are the products of double decomposition reactions, such as sulfuric acid and sodium hydroxide to generate sodium sulfate and water, and other reactions can also generate salts, such as displacement reactions.