Salt, the main component is sodium chloride. The ancients did not really master the salt purification technology until the Tang Dynasty. The Chinese became proficient in the purification of sea salt and mineral salt, which should be in the late Song Dynasty. At the end of the Song Dynasty, Jiangnan alone was able to make the whole world rich, and the large-scale production of salt played a huge role.

The ancients made salt:

The ancients made salt in two stages:

First, edible coarse salt directly (there was no purification process). Most people in this period did not live long because coarse salt contained a large amount of toxic substances. If people ate too much salt for a long time, it would cause tooth loss and other phenomena. At that time, there were no current technologies such as dental implants and dental implants. For ordinary people, being without teeth is basically waiting to die.

2. Refining coarse salt (crude purification). After the ancients used salt field evaporation to obtain coarse salt or mined mineral salt from the mine, they did not put it into consumption immediately. Instead, after obtaining the coarse salt, they went through three steps of water dissolution, filtration and cooking. After filtering and cooking, they obtained the coarse salt. The salt in China is not much different from the current table salt, but because the processing technology is not as refined as it is now, maybe the salt at that time was not very white (with a small amount of impurities)

As for individuals in the wild How to purify coarse salt: The method of obtaining coarse salt in the wild is roughly the same as the method used by ancient people to obtain coarse salt.

Specific steps:

1. Melt the coarse salt with water and set aside. Prepare a mineral water bottle, remove the bottom and set aside. Prepare a small amount of fine sand, coarse sand, and activated carbon (you can’t find it ready in the wild). You can burn it by yourself. You can get it by burning the wood until it is semi-transparent and then smothering it.) Crush it and set it aside. A small piece of cloth, a rubber band or a string can be set aside;

2. Cover the mouth of the bottle with a cloth. , tie it tightly with a rubber band, fill it with fine sand (one-fifth of the water bottle), then put activated carbon (one-fifth of the water bottle), and finally put coarse sand (two-fifths of the water bottle). At this point, the simple filter is completed.

3. Pour the salt water obtained through the filter into a pot and boil it. After the water is boiled dry, you will get salt that can be used.

Principle: Carbon adsorption, evaporation and crystallization

(Please adopt)