The whole family of villains criticized her wildly, but the princess treated her with medical treatm

"Didn't you know that salt mines are highly toxic and can kill people?"

Yan Yang was a little surprised. He knew that his fiancée had many ideas, but the salt mine six hundred miles northwest of Yundu was uninhabited for a hundred miles. Not only were there highly toxic mineral salts, but there were also poisonous snakes, poisonous insects, and tigers.

"Yes, little aunt, the mineral salt from Maomao Mountain can really kill people."

The laughing and joking Qin Xiaohou suddenly turned pale with fright, and put on an expression that said this must never happen, "In the past two years, due to the lack of salt in the army, a small group of more than a dozen soldiers secretly went to the mountains to grind the salt mines. It turned into dark brown salt particles and died soon after eating them."

Mu Tingxue smiled and said, "The name of this mountain is quite cute."

Uncle Yan Yang and Qin Zhaoyi became more and more anxious when they saw her being so dismissive and indifferent.

"Cousin, it's too risky."

"Yes, we already have mustard! In Yunhuang, we can only eat the salt from the Woye River and the salt brought from the sea."

Mu Tingxue asked: "Do you think mustard is delicious?"

The two nodded without hesitation.

Even the Prince Regent and Prince Qinchuan, who are used to eating delicacies from the mountains and seas, have to admit that mustard mustard is delicious and refreshing.

The corners of Mu Tingxue's lips deepened: "Then, is mustard poisonous?"

"Natural and non-toxic."

Isn't this clear?The soldiers had just finished eating steamed buns with pickled mustard. They were all as happy as gods, more energetic, and their weak bodies had recovered somewhat.

Mu Tingxue said slowly: "Did you know that the salt used to pickle these pickles is extracted from salt mines?"

Most of the table salt in China is mineral salt, not sea salt.

Large areas of salt mines and well salt are enough to feed tens of billions of people around the world for 1 years.

The Prince Regent was shocked.

Mr. Qin Xiaohou took a deep breath.

Near the camp, the soldiers who had just eaten mustard today also turned their heads. They couldn't believe that such delicious and salty mustard was actually made from poisonous salt?

Outrageous!

Mu Tingxue looked at the stunned Qiu Ba and asked, "Did you feel uncomfortable after eating mustard? Are there any signs of poisoning?"

Everyone shook their heads.

It feels very comfortable, and I feel full of strength after eating it.

Mr. Qin Xiaohou said in surprise: "I thought it was pickled with snow salt."

Snow salt is a refined salt specially supplied to nobles, and is more expensive than gold.

Mu Tingxue said confidently: "So, as long as you master the method of refining and purifying, even toxic salt mines can turn waste into treasure."

The reason why Maomaoshan's mineral salt is considered highly toxic is because it contains a lot of impurities such as magnesium ions, calcium ions, potassium ions, sulfate ions, magnesium sulfate, and magnesium chloride. It not only tastes bitter, but is also extremely harmful to the human body. .

However, as long as it is purified and filtered correctly, impurities can be removed by using the ash leaching method or soil leaching method, or even soy milk, and white and fine refined salt can be obtained.

Yan Yang no longer defeated her, and fully supported her: "I am worried too much. I will recruit [-] elite soldiers immediately, sign a confidential military order, and break camp early tomorrow morning."

Mu Tingxue thought to herself, didn't they agree on five thousand, but why the number of people doubled.

For those who didn’t know, they thought we were going to conquer the city.

"There is no need for a confidentiality agreement. This salt mine purification method will be promoted to several other salt mines sooner or later." In her opinion, this is not such advanced physics and chemistry knowledge, and there is no need to lock up information.

The more widely it is promoted, the higher the salt production will be and the lower the price will be.

The more common people can eat salt, the more they will no longer get sick from salt.

"It must be kept secret!"

Yan Yang's eyes were solemn, "My cousin doesn't know that Tatar and Lupan are both inland and lack salt. You can sell the refined salt obtained by purifying the mineral salt to Lupan and Tatar, the two western foreign vassal countries. Not only can you increase The income from the treasury can also make them loyal and become Yunhuang's barrier to restrict Xiling Kingdom in the west."

Mu Tingxue responded: "Okay."

*. *. *

Mu Tingxue and Yan Yang led an army of ten thousand people and meandered away from Baidi City in the morning light.

During the six hundred-mile march, all the food and supplies accompanying the army were carried on handcarts.

In the afternoon of the third day, we arrived in the no-man’s land of the salt mine.

"Looking at the mountain, it really looks like a lying cat. The cat is very sneaky."

Mu Tingxue got off the carriage and entered Maomao Mountain.

Although it is deserted, there is a winding river, and the green water reflects the warm sunshine in April.On the rock walls of the mountain, you can see large pieces of reddish-brown and almost black crystals, which are salt mineral crystals rich in impurities.

Not only is there rock salt, but walking down the river, you can also see small salt mines by the river.

"There is a cat cave to the north."

Yan Yang said, "The cave is very deep. Six to 70 meters down, there is a huge salt mine."

Mu Tingxue originally planned to get salt by the river, but after hearing what he said, she suddenly became interested: "Come on, let's go to Maomao Cave."

A quarter of an hour later, we arrived at our destination.

Because the Maomao Cave is too deep and I don’t have the equipment to go down, I won’t go down for the time being. However, at the entrance of the cave, you can also see that the cave wall is covered with salt crystals all the way down.

Mu Tingxue used a bronze ax to knock off several large pieces.

As required, the soldiers arranged a large and wide area near Maomao Cave.Bronze axes, axes, chisels, carrying tools include bamboo baskets, bamboo dustpans, bamboo tubes, large ceramic pots, wooden sticks, tapered piers with large mouths and pointed bottoms, hand-operated stone mills, and clean linen cloth.

These equipments were all requested by the eldest princess.

Yan Yang had never seen such strange salt-making equipment.

The soldiers were the same, their eyes widened and they looked carefully, wanting to witness the birth of mustard mineral salt with their own eyes.

Mu Tingxue knew that these [-] elite soldiers had all signed confidentiality agreements.Not surprisingly, they were the salt workers who would mine Maomao Mountain in the future, and they were under unified military management.

In order to make it easier for everyone to see the process more clearly, she deliberately slowed down her speed when demonstrating.

The first step is to put the huge salt crystals into a stone mill, break them into small pieces, and then grind them into granules.

In the second step, use a bamboo basket and bamboo dustpan to perform vibration filtration, which can filter out slightly larger pieces of salt, leaving behind brown salt mineral powder.

The third step is to dissolve the brown salt mineral powder in the wooden barrel and stir thoroughly until the salt is saturated.

The fourth step is to pour the saturated solution in the wooden barrel into a tapered pier with a large mouth and a pointed bottom covered with linen. Because the fiber mesh of linen is larger, it can replace the filter paper in the coarse salt extraction experiment.When the filtration is complete, the linen cloth is covered with fine black impurities, and the salt solution in the conical pier has changed from dark brown to light brown.

Repeat this step three times until the salt solution becomes clear.

"Bring the ashes here."

"Yes, Your Highness!"

Mu Tingxue said: "The impurities have been filtered. Today I will teach you the first method of drenching ash. Ash refers to plant ash, which can help detoxify mineral salts."

The main component of plant ash is potassium carbonate, which can precipitate calcium ions and magnesium ions, which is a high-school chemistry content.

Everyone became excited when they heard the word "detoxification"!

Yan Yang stared at his wife, with an almost fanatical light suppressed in his narrow eyes.

Even though her beautiful dress had been stained with brown salt mineral solution; even though her white cheeks were stained with a lot of mineral powder, and she no longer had the restraint of a royal princess, his heart was pounding. .

"The fifth step is to dissolve the plant ash, filter it and precipitate it."

Mu Tingxue still demonstrated in person. The process of dissolution and filtration was similar to before, until a relatively clear plant ash solution was extracted.