The sun is mighty, the green mountains are faint, and although the sun is very hot, there is occasional wind on the top of the mountain.

Because the two hills are not far apart, and the ancients had strong eyesight, everyone can see from afar with their eyesight, and they can completely clear every move on the other side.

……

This side of Little Salt Mountain!

After Li Yun smashed down the cliff, he first chose a big stone the size of a grinding plate, and then picked up the sledgehammer and slammed it twice, and the big stone was smashed by him in a blink of an eye.

Rumble!

Li Yun threw the sledgehammer to the ground,

He turned his head to look at it twice, and suddenly beckoned to Cheng Chu, and said with a smile: "Everyone come here, I will teach you how to refine refined salt now......"

Cheng Chumo hurriedly stepped forward, his eyebrows and eyes were full of excitement, and a group of Cheng Mansion family members and a hundred and ten homeless people behind him also hurried over with all kinds of tools.

"It's all optimistic......"

Li Yun coughed, bent down and picked up a few stones from the ground that were smashed by him, and said in a deep voice: "If you want to refine salt in the stone salt mine, the first step is to smash the big stone, the more you smash it, the better, the easier it is to save trouble, if you can smash it into powder, then I count your ability ......."

Everyone was stunned for a moment, looking at each other stupidly.

Li Yun smiled and said, "Of course, no one in the world can have such a skill, if you want to turn stones into powder, we need to use tools......"

Cheng Chumo hurriedly interjected, and hurriedly said: "Master, don't worry, those few things have been brought, all of them are cast according to the drawings you gave, and they are secretly refined by the craftsmen of my Cheng family." ”

"Good!"

Li Yun nodded and asked, "What about things?" ”

Cheng Chumo walked a few steps quickly, and walked to a boulder not far away, and Xiaobawang reached out and forcefully lifted a piece of coarse cloth, revealing several utensils hidden underneath.

Under the vast sunlight, a faint light folded out slightly, and everyone stared at the artifacts carefully, and found that these things were all large iron casts.

As far as the eye can see, there are two huge iron casting grinding discs.

These two iron mills are all black, I am afraid that they will weigh thousands of catties, and I don't know what method the Cheng family has used to get such a huge iron mill to the mountain.

Next to the iron mill, there is a row of ten large iron pots, this is not the kind of small pan that Li Yun purchased, but a large army pot used in the army.

One pot can cook 50 people.

In addition to the iron mill and the iron pot, there was also an iron pipe-like utensil, with a huge iron bucket attached to the upper end and a huge iron bucket at the lower end, separated by an extremely fine gauze that was one every three inches.

"Very good, with these things, refining salt is not a difficult task......"

Li Yun stepped forward to observe, nodded with satisfaction, and suddenly pointed to the iron pot and said to everyone: "You guys do it together, first support the grinding plate, then set up the iron pot, and assign a team of people to fetch water." ”

A group of family members and homeless people hurriedly stepped forward and shouted a trumpet to support the two iron mills.

At this time, Li Yun returned to the bottom of the collapsed cliff and continued to pick up the stone salt mine that he smashed into small stones.

Picking up five or six times back and forth, all of them were filled into the holes of the big iron mill, and then Li Yun snorted softly and suddenly struggled to turn the iron mill.

Crunchy!

The iron grinding made a tooth-aching screeching sound.

……

"What is he doing?"

"Grinding stones with iron?"

On the hill not far away, Li Shimin and the others were full of confusion, and the emperor pondered for a moment, and guessed in his voice: "Could it be that it is to be ground into stone powder?" ”

As it turned out, the emperor guessed correctly.

But seeing that Li Yun struggled to turn the grinding plate, he quickly grinded all the small stones, and there was constantly powder under the grinding plate, and a green glaze color flashed under the sun.

Cheng Chumo stepped forward quickly, holding a utensil in his hand to collect the powder.

At this time, the displaced people who fetched water had already returned, put down the bucket and waited silently on the side, Li Yun and Cheng Chumo carried the stone salt powder together, and then poured it into the big iron bucket above the iron pipe.

"Pour water, soak ......"

Li Yun snorted lightly, stretched out his hand to wipe the sweat on his forehead, and said with a smile: "Next, we have to wait for a cup of tea, it happens that the weather is a little hot, let's find a shade to avoid, and I will tell you the principle by the way, so that everyone will not know why it is......"

As they spoke, the homeless people had already poured water into the iron buckets, and everyone could only hear the sound of sizzling bubbles, as if the water was subtly blending with the stone powder.

Li Yun explained in a deep voice: "The ore of stone salt, the content is quite mixed, let's make it into powder in the first step, and the second step is to melt it in water, and after a cup of tea, the salt is all in the water, and the impurities have been left, which is called preliminary filtration ......."

Cheng Chumo's eyes lit up, and he suddenly became smarter, and shouted excitedly: "Master, I understand what you said, hahaha, salt melts in water, and when the water dries, it becomes salt, ahaha, it turns out that making salt is so simple?" ”

Li Yun didn't look at him angrily, and said with a wry smile: "If it's so easy, wouldn't the Taiyuan Wang clan think of it?" ”

Cheng was stunned.

Li Yun slowly walked to the side of the iron pipe, tilted his head to observe the situation of the big iron bucket, and after looking at it for a long time, he suddenly turned on the switch of the iron bucket, only to see the water flowing down the pipe, through layers of gauze constantly filtering.

By the time the salt water flowed to the iron bucket below, there was no stone powder left in it, and everyone curiously stepped forward to observe and found that the salt water had a hint of brown glaze color.

Li Yun pointed to the salt water and said: "This is only preliminary filtration, and what is removed is the impurities of stone powder, but the water still contains impurities, which is what you call stone salt poison." ”

Poison!

Everyone subconsciously took a step back.

Cheng Chumo swallowed nervously and whispered, "Master, how to get rid of this poison?" ”

Li Yun glanced at him and said, "What about the charcoal you prepared?" ”

"...... here"

Cheng Chumo hurriedly walked to another place, uncovered a piece of coarse cloth again, and said loudly: "I made ten trucks of charcoal, and I smuggled it up the mountain last night." ”

"Get a few pieces and bring them!" Li Yun shouted.

Cheng Chumo hurriedly agreed, bent down and chose a few pieces of charcoal and ran over.

"Smash all the charcoal and wrap it in gauze......"

"Okay master!"

Cheng Chumo found a sledgehammer and slammed it.

Soon the charcoal was smashed into pieces, and then carefully wrapped in gauze.

Li Yun threw all the charcoal into the iron bucket, and everyone heard a sizzling sound again, and there were fine bubbles in the water, and everyone was amazed.

"Now, stir a cup of tea, with your greatest strength, and the faster you stir, the better."

"Okay master!"

Cheng Chumo turned into a well-behaved little and agreed, picked up a stick and stirred it against the iron bucket.

The brown color in the salt water gradually became light, and when the water liquid was free of impurities, Li Yun stepped forward and dipped his finger in it.

Taste it in your mouth, it's good, only salty, no bitterness.

This is charcoal that completely absorbs the metal toxins in the salt mine, and there is no longer any risk that impurities will remain in it.

"Raise the pot, burn the fire, boil the salt water, and wait for the crystallization ......"

At this point, Li Yun himself was a little excited, after all, he had only checked the method of making salt on the Internet in later generations, and he did not know whether he could refine refined salt.

Now that he saw that the salt water was clear, he was already very sure.

On the hill in the distance, Li Shimin also subconsciously clenched his fists, and the emperor also felt nervous about success or failure.

Someone suddenly came over and said in a low voice: "If this method can really become salt, the secret recipe must be strictly controlled, Your Majesty should make a decision as soon as possible, and you can't let a child ......"

Li Shimin glanced at him and found that it was the eldest grandson Wuji who spoke.