Bai Yuqi only needs to save his mana and take charge of the final [Extraction] process!

"Dog, go back to the village and call more people over!"

"Bring hammers and chisels to mine the brine. ”

"Move two stone mortars and stone grinders up, and crush and grind fine rock brine nearby. ”

"Then find some cloth and charcoal to strain the dregs, and barrels and iron pots to boil salt ......"

After making up his mind, Bai Yuqi began to command, and the dog listened nervously, for fear of missing something, and then ran towards the village quickly while muttering over and over again.

Then Bai Yuqi instructed Zhang Xiaoshan to chop some bamboo tubes for backup, and he had to prepare a large amount of firewood as fuel.

There is no need to find clean fine sand, there is a thick layer at the bottom of the bitter spring pool, find a fine sieve, and sieve some out.

The only thing is that charcoal is a bit difficult to do, and the charcoal ash obtained by burning wood directly is not as good as the large charcoal that has been carbonized by the kiln.

Based on the conditions of the people of Kushui Village, it is estimated that they cannot afford to use charcoal.

In addition, Kushui Village is located in the deep mountains of Zhongnan Mountain, and firewood can be picked up everywhere, so it is natural that it will not be so luxurious to live and cook with charcoal.

Therefore, Bai Yuqi plans to use charcoal ash first, and then try it first.

Anyway, even if the charcoal ash is not filtered cleanly, heavy metal ions and mineral impurities, toxins and harmful substances.

In the final process, a [Extraction] can still extract clean and non-toxic pure salt, and these pre-processes are just to save his mana.

But unexpectedly, Bai Yuqi called the dog back to bark, and when he called the villagers to bring tools and come over, and collect the charcoal ashes in each earthen stove by the way, he heard Yang Tieniu say that there was charcoal in Kushui Village.

Although the people of Kushui Village do not use charcoal, there is a carbon household in the village that specializes in charcoal burning, called Yang Lao Carbon.

Yang Lao Tan and his two sons, Yang Da Tan and Yang Xiao Carbon, opened a few carbon kilns near the village, and sent the wood to Lantian County at the foot of Zhongnan Mountain every day, and sold it to large households in the county, which is also one of the few products in Kushui Village.

Therefore, Kushui Village is poor and poor, but there is no shortage of good charcoal, which is an unexpected joy.

It didn't take long for a faint commotion to come from the direction of Kushui Village under the hill.

Soon I saw that the entire Yang clan, except for those who were lying on the bed and couldn't move, the other villagers all poured out of the nest, carrying all kinds of things on their shoulders and rushing towards the direction of the bitter spring.

The first to arrive was the old man from the old village.

People who are almost sixty years old actually run like flying in the mountains, and they have lost one of the straw sandals on their feet.

didn't care about the sole of one foot, the blood was flowing from the stones and thorns, the clothes were scattered, and the image was completely lost, and the old face looked excited and said with a trembling cheek: "Real person, can you really open an altar to refine salt in the bitter spring?"

What the hell is the altar of salt refining?

"If you are not mistaken, there should be a salt formation formation under the bitter spring after the ancient ocean dried up!"

"Groundwater is reduced to seawater after passing through the salt layer, but unfortunately, there are many minerals under the bitter valley, and the spring water that gushes out melts the rock layer and melts a large amount of minerals to become a toxic bitter spring. ”

Bai Yuqi said with some regret: "Otherwise, this is a good cenote salt mine!"

"You...... You mean, this bitter spring leads to the sea?"

Lao Cunzheng obviously didn't understand Bai Yuqi's words, and said with trembling lips: "Isn't that bitter spring an eye of the sea?"

Bai Yuqi opened his mouth, but he still gave up, I can't explain it to you clearly.

When the men, women, and children of the hundred and tenth arrived, Bai Yuqi instructed them to clear the shrubs and weeds around the bitter spring, and make room for the opening of the altar to refine salt on the spot.

Several strong villagers carried a sledgehammer to knock down the crusting rock halide crystals on the rock wall, and then used the stone mortar to form small particles and then grind them into powder by hand.

Then pour it into a wooden barrel and stir it with bitter spring water, and when the powder deposits no longer melt, pour the saturated solution into a large vat covered with several layers of thick linen.

The next process is more detailed, Bai Yuqi asked the villagers to cut the thick bamboo, take the thickest few knots with a stab knife to open the bamboo joints, and open a small hole at the bottom.

After filling in charcoal, toner and fine sand from bottom to top, and rinsing it with a bitter spring several times to no longer flow out dirty water, a filter cartridge is prepared, and more can be used for backup.

Then tie the bamboos and build a high and low shelf with one end high and one low end.

Arrange the filter cartridges in rows, and follow a half-planed bamboo tube under the water outlet.

In this way, the clean brine filtered out can be collected and flowed into the wooden barrel used to receive the salt water along the bamboo tube like the "rain eaves" under the eaves.

After the preparation is done, you can arrange for someone to continuously pour the saturated solution in the large vat into the filter cartridge with a scoop to filter the clean salt water, and then boil it in the pot.

The old village is looking at the black-brown rock halide crystals on the rock wall, and the color becomes lighter with each process.

Brown, red, cyan, and finally poured into the pot to boil, the crystallized salt cubes are already pale cyan.

Suddenly, he trembled with excitement and shouted: "Green salt! This is green salt! It's better than the green salt used by those big families in the county!"

I can't help but let the old man not get excited.

You must know that the official salt sold in the salt shop in the fang market is nothing more than brown salt.

That is, after being dried or boiled with seawater, the large pieces of salt that crystallize out and are crushed, and the taste is limited to the salt cloth that Yang Tieniu took out before.

And a better salt is not something that ordinary people can enjoy.

The color is red or light red crystals, so it is also called red salt, which is a large household food or simply used as a medicine.

As for the higher grade green salt, there is no need to mention it, it is not for people to eat.

Only the dignitaries and the wealthy and wealthy chambers of commerce brought them to clean their mouths, and the price of a small box is unknown.

From here, it can be seen that the so-called different types of salt are nothing more than a problem of the refining process.

Bai Yuqi's salt filtered out is actually the so-called green salt.

Even because after the process of charcoal filtration, the output is green and white salt with higher quality than green salt, and there are no too many harmful substances, and it can be eaten.

But Bai Yuqi, who is accustomed to the snow-white salt grains of later generations, obviously will not stop at this step.

In particular, these salts are still extracted from bitter springs with excessive heavy metals.

Even if he is considered a person who has been tempered by the periodic table in the next life, he is not at ease to eat all kinds of chronic diseases that fail here and there?