I do research in ancient times

Survival is always the first motivation.

Seeing the bottom of the salt in the warehouse, Donghu Sanbu's strong fighting spirit was completely detonated.

Of course they couldn't compare to the professionalism of Mo Zong's civil engineering team, but the people of the tribe were willing to endure hardships, obey orders, and spare no effort. These really made up for many shortcomings.

Fortunately, the sun salt farm does not require too complicated construction techniques, and the most technical surveying and mapping site selection is also handled by Ning Juzi, and the rest of the people can be competent as long as they follow the command.

According to the topographic characteristics near the blood pool, Ning Fei planned a three-level stepped evaporation pool and an independent crystallization pool, and planned to strictly distinguish the sedimentation according to the time schedule to ensure that the quality of the salt produced by the crystallization pool is stable.

The preferred location is naturally the tuyere area.Keteng Mountain has westerly winds throughout the year, and the airflow is stable at sunrise and sunset, and the wind becomes stronger at noon, which is very in line with the requirements for sun-drying salt.

The strong westerly wind crossed the Tuotuo River Valley and entered the Blood Pool Wasteland. The direction of this wind was measured by Ningfei when he built the hot air balloon before. It was only necessary to determine the orthographic area of ​​the narrow tube effect, and the site selection was successfully completed.

Ning Fei chose a high slope on the east side of the blood pool.

The flat area of ​​about ten mu is not large in scale, but it is enough to operate as an experimental field.Before they had time to polish the stones, the Tuhe people covered the bottom of the evaporation pool with gravel chips, and then used the rolling logs used for building pilings to repeatedly push the bottom of the pool flat, and a simple evaporation pool was built.

With the first finished product, the second and third pools will be completed soon.

In order to save manpower for diversion, a certain height difference is reserved between the three-level pools. The skilled craftsmen of Nanshi installed the gates and built several water outlets, which can quickly extract the brine in the pools to avoid accidents caused by the weather. crystallization loss.

Of course, flood control dams are also essential.

There is no man's land near the blood pool. In the past, no one cared about how the lake was tossing, but now that a sun-dried salt field has been built by the lake, the blood pool has to be prevented from flooding.

This kind of embankment does not need to be too elaborate, just build a small earth dam with stones, sand and bamboo weaving, and dig two diversion channels near the salt field to ensure that the soaring pool water will not overflow the embankment and be directly poured into the evaporation pond.

In this way, Donghu Saltworkers only need to open the gate on the embankment to introduce the blood pool water into the primary evaporation pool. After evaporating in the pool for two days, they then put the already thick brine into the secondary pool through the middle gate, and at the same time continue to lead the lake water into the second pool. The first level, repeated for several days, can produce a steady stream of salt brine with balanced quality for later use.

All Donghu salt workers working in Yantian saw this change.The brawny man, who was disbelieving at the beginning, is now convinced, and looks at the brine in the pond with loving eyes.

It's salty, it's really much saltier than the lake water that hasn't been exposed to the sun before. Why didn't they think of drying the water before?

But no matter how much it is dried, it is not formed salt.

Just when the salt workers thought the brine would last forever, Mr. Ning Xiao suddenly said that it could be poured into the crystallization pool.

Seeing the brine flowing into the last stone pool, Ning Fei turned to Han Tu, the head of the Nanshi clan.

"How much salt do you have left?"

Hantu was taken aback.

More than ten days have passed since the excavation of the salt pan.The salt warehouse at Nancheng Wharf was completely destroyed by Hai Lida and Sai Mu. Fortunately, there is still a small salt warehouse in the city, and there is still some stock in it.

However, making salt fields is a labor-intensive job, and the appetite of young adults increases greatly, and the salt is consumed very quickly.Even though the three families have invested, Nanshi's foundation is undoubtedly the weakest, and it is already a bit stretched.

But since Mr. Ning Xiao asked, Tuhan didn't mean to hide it.

"Not much, but there is still a hundred and ten catties."

One hundred catties...

Ning saw that he touched his chin.

There are two to three thousand people in the Nanshi tribe, even if they save this little salt, they can't last for a few days.

"Where are the Baike and Tuhe people? Can you spare some salt?"

Hearing his question, Tuhan was slightly taken aback.

Didn't Mr. Ning Xiao say to make salt?Why even out the salt?

"To be a salt seed."

Seeing his doubts, Ning Juzi explained with a smile.

"Sprinkling raw salt as a seed crystal can promote the continuous crystallization of brine, which can increase production."

Oh, so.

Tuhan was stunned.

But after all, Nanshi didn't have much salt in storage, so he only sprinkled a little bit less, so he was a little hesitant about making salt seeds.

"Then let's Tuhe go out."

The bearded patriarch on the side patted his chest.

"Mr. Ning Xiao said that he can charge more, but I, Bu Li, have nothing to say, I absolutely believe it!"

He decided to bring two bags of salt, and under Ning Fei's guidance, the salt worker sprinkled all the coarse salt into the crystallization pond.

After waiting for another two days, salinization gradually appeared in the crystallization pool.

Ning Juzi walked around the pond twice, focused on observing the crystal plate at the bottom of the salt pond, and then touched his chin.

"Time to rake in the salt."

What Ning Fei said about raking salt is to use a salt rake to break up the hardened salt layer at the bottom of the crystallization tank to form small particles.

This is a job that requires both strength and skill.The salt layer will not be broken if the force is small, but the rock mud at the bottom will be scraped with great force, which is a test of the control of force.

Feng Kai tried it, and soon found the trick.

He and Helan raked the salt together, and the grains he made were fine but not stained with impurities, while Helan was rougher, raking a corner of the salt pond into a muddy soup.

"You're so careless! It's all salt!"

Hemuda stomped his feet angrily.

His son is a good hand at sailing the boat, but he really doesn't think about it when he does other things, but it's embarrassing for him!

Helan laughed dryly, and looked at Ning Fei begging for help.

"Sir, what should we do?"

Ning Fei: "There's no other way, let's mess around."

Fortunately, when he built the crystallization pool, he kept an eye on it and divided the huge pool into several parts with stones, each with its own water outlet.He asked the salt workers to pour some clean water into the pond, and at the same time use a wooden rake to push the muddy water in the pond to the water outlet, which quickly solved the problem of muddy water.

The next few days were heavy physical labor, and the salt particles in the salt pond gradually precipitated out, and it was necessary to rake the salt repeatedly to prevent the salt particles from joining together.Seeing the fine and lovely pale pink salt grains, the salt workers in the saltworks worked tirelessly to push the salt back and forth in the crystallization pool.

Finally came the day of collecting salt.

This time, no one was invited, and the heavyweights from the three tribes of Donghu gathered in Nanshi City again.

Seeing the wooden carts full of pink salt being pulled into the small courtyard, the three chiefs seemed to have drunk fake wine, their faces were flushed, and they were trembling slightly with excitement, and they didn't know where to put their hands and feet.

"Salt is out! It's really salty! We're really out of salt!"

Tuhan said excitedly.

Tuhe patriarch Buli was more direct.

He reached out and grabbed a handful from the wooden cart and stuffed it into his mouth. While being tearful, he kept giggling.

"Salty! Salty! Much saltier than the ones we bought before, really good salt!"

He turned to look at Ning Juzi who was beside him.

"Little Mister, is this a success for us?"

Ning Fei was also affected by the atmosphere, originally he was smiling to see the acceptance results of several people.After hearing Bu Li's question, he shook his head slightly.

"It's still the last process."

The last process.

The few people who were about to celebrate wildly turned their heads, all with question marks on their faces.

This salt has no bitterness at all, and the grains are uniform. It is much better than the salt they can get in exchange. What more steps are needed?

"To be purified."

Ning Fei said with a smile.

He didn't talk nonsense, and directly took out the tools to demonstrate to several people.

Although the quality of the salt block produced by the blood pool is good, it is still inevitably mixed with impurities and needs to be further filtered and purified.

Due to limited conditions, some instruments and chemical reagents cannot be obtained in this era, so the purification steps can only be simplified as much as possible.

Ning Fei found a wooden bucket, poured it directly into the well water that had been boiled and cooled before, and kept putting light pink coarse salt into the bucket until the salt water was saturated.

Yesterday he asked Helan to send the sails for the squid boat.Miss Pinghua's cloth is fine and tight, which is very suitable as a filter paper for wrapping activated carbon.The filtered charcoal block is purely handcrafted by Nada, a craftsman of heaven, under the guidance of Ning Fei, and the quality exceeds Ning Saw's expectations.

After several times of repeated filtration, the brine in the wooden barrel became clearer at a speed visible to the naked eye, which amazed everyone.

"I've wanted to ask for a long time, what kind of fabric are you using that is so fine?"

"Yes, yes, it's just right for a sail. It must be special for a ride."

The three departments of Donghu have boats, so they can see the benefits of canvas at a glance.

Ning Fei did not hide his secrets, and took the opportunity to buy a wave of products from his own weaving workshop, which attracted everyone's yearning,

"Oh, it would be great if his mother could go to sea. I will go to your place to have a look and buy a few rolls of canvas to have fun at sea."

Bu Li patted his forehead.

"You bastard Xihu bastards, sooner or later I will fight with them!"

Thinking of the blocked estuary, everyone felt a little depressed.

Fortunately, at this time, Mr. Ning Xiao had a new move.He took out shell ash and soda noodles, mixed it with a little water, and poured it directly into a clay pot. At the same time, Feng Kai also poured the salt water in the wooden barrel, and kept stirring with a wooden stick. The two cooperated very tacitly. White impurities appeared in the fast barrel.

"This... what kind of spell is this?"

Tuhan opened his eyes wide and murmured.

"It's the art of transforming things!"

Clay replied very proudly.

"Two different things mixed together become something else, the teacher in the school said!"

Everyone in Donghu didn't know it, and they became more and more fascinated by the Jiuling City that the children said.

No wonder Ye Suli risked his life to visit the Central Plains, it is really a magical place!

"The last step is to boil the salt."

Seeing everyone's brows twitching slightly, knowing that they had recalled their psychological shadows again, Ning Fei explained with a smile.

"It doesn't need to be boiled for a long time, because the concentration of salt water is close to saturation, and it will be almost the same after a while."

"If you are worried about Fei Chai, you can wait until the winter is cold to let the salt separate out naturally, the same effect."

In winter, it will take a long time.

The three chiefs looked at each other.

I can't afford to wait, but fortunately, Mr. Ning Xiao said that it doesn't cost money...

Then there's no harm in trying.

Sure enough, salt crystals soon reappeared in the pot.

The salt this time is even more crystal clear than the previous salt, presenting a light pink fine powder, so beautiful that people can't take their eyes off it.

"Ah... Dad, is this salt?"

Rao Helan is well-informed, so he has no idea at the moment.

This kind of salt was different from any he had seen before!If he hadn't witnessed the whole process of drying the salt with his own eyes, he would never have guessed that this beautiful crystal was made from the inauspicious pool of blood!

"Dad..."

Helan swallowed, his eyes drifting.

"That's not a pool of blood, it's a pool of treasures!"

"If this salt is sold to the Central Plains... I am afraid that the emperor will do business with us!"