Hurrying slowly all the way, Liu Chen and the others finally arrived at the salt mine.

After more than a month of construction, the salt mine has vaguely formed the shape of a small factory. It is surrounded by Changshan Army Corps to guard against accidents.

"Your Highness!"

Yanguan and other officials saluted respectfully.

Liu Chen said straight to the point:"Prepare fine sand, coarse sand, charcoal, limestone, trona, a piece of cloth, string, and boiled water. Don’t forget the most important thing, salt"

"yes."

Yanguan and others immediately went down to deal with it, and quickly prepared all the tools.

Jushou, Tian Feng, Zhao Yun and others were watching with curiosity.

Yanguan and other officials were even more attentive.

Liu Chen looked at the big bag full of Coarse salt is made by pumping up the underground brine from the salt mine and then boiling it to crystallize it.

This is how the ancients made salt. It has large particles, bitter taste, and is full of impurities and some invisible toxic substances. It is not filtered thoroughly, and eating too much is harmful to the body.

Liu Chen pointed to the coarse salt and said:

"First pour the coarse salt into the wooden barrel and dissolve it with water, then let it sit for more than two hours.

"After the sediment and other impurities have completely settled, use a thin tube to drain the upper clear liquid into another clean wooden barrel."

Everyone nodded repeatedly, very focused, and the clerk immediately followed Liu Chen's instructions.

Liu Chen continued:"There is another way, which is faster, the carbon adsorption method."

Liu Chen found another wooden barrel, drilled the bottom, then covered the hole with a cloth and tied it with a string. Then he poured the fine sand into it, about one-fifth of the height, and then put the charcoal in it. Acts as activated carbon and finally fills it with coarse sand.

This simple filter is complete

"This is a carbon adsorption method, which uses the principle of charcoal to adsorb impurities to filter the dissolved brine impurities. fall down……"

After the clerk poured down the dissolved brine, it was filtered through coarse sand, charcoal and fine sand. Many impurities in the brine were filtered out.

Everyone was a little surprised!

"Your Highness is truly a god, he could even think of such a filtering method!"

"Is this how to make salt?"

"I see that the brine is much clearer. After boiling, there must be no impurities in the brine!"

Liu Chen was speechless. These people were too quick to flatter him. He said lightly:"This is just a rough filtration, there are still processes behind it.

Everyone was dumbfounded and looked embarrassed! Liu Chen pointed at the limestone and said," Heat and burn it with charcoal fire, and it will turn into quicklime. Then add water to make lime milk.""

The clerk immediately followed the instructions. Liu Chen naturally did not need to do these trivial matters himself.

Then soon, the saturated lime milk solution appeared.

"Pour the milk of lime into the coarsely filtered brine and stir. The milk of lime reacts with the magnesium ions in the brine to form magnesium hydroxide and precipitate."

Liu Chen spoke out all the professional terms of later generations.

Everyone looked at each other, and Jushou asked with some embarrassment:"Master, this magnesium ion? magnesium hydroxide? What is this?"

"This is chemistry knowledge. You can go to the library to read related books."Liu Chen explained simply.

Everyone nodded.

Ju Shou and Tian Feng looked at each other, extremely embarrassed.

In front of Liu Chen, they were just like fools!

"This step removes magnesium ions from the water and also removes the bitter taste. Repeat the first step and take the supernatant from the upper layer. Or use carbon adsorption to do it quickly."

Under Liu Chen's instruction, the clerk poured the salt water into the filter again, and all the magnesium ions were filtered out.

"Trona is then added, which reacts with the calcium ions in the brine to form a calcium carbonate precipitate"

"This step can remove calcium ions from the water and also remove the astringency. Then repeat the first step and take the supernatant. Or use carbon adsorption to do it quickly."

Liu Chen continued.

Jushu and Tian Feng opened their mouths, but finally chose to close their mouths!

They also couldn't understand what the hell about calcium ions and calcium carbonate! But it is probably a chemistry-related issue!

"It seems that after returning home, I will go to the library to read some chemistry books."

Ju Shou and Tian Feng looked at each other. They are Liu Chen's advisers. They don't know this bit of knowledge. Isn't it a joke?

Zhao Yun has no pressure. He is a military general. There is no problem if he doesn't know this!

But Liu Chen His calm and leisurely erudite demeanor still aroused the admiration and admiration of everyone around him!

Only His Highness can come up with such a troublesome solution!

After the salt water stopped producing turbidity, Liu Chen continued:"Next Distillation and crystallization."

The officials and junior staff immediately went to do it!

Everyone looked full of anticipation. After working hard for so long, it was time to see the final result!

After the decoction crystallized the brine into table salt, everyone was completely shocked!

They were seriously The table salt is no longer the thick coarse salt that is everywhere in magazines, but the snow-white refined salt!

"Here, try it quickly……"

Yan Guan said excitedly, but then he couldn't wait any longer. He stretched out his finger to taste a little, and then said with excitement:

"Your Highness, there is no bitter taste anymore!"

Ju Shou, Tian Feng, and Zhao Yun also rushed over impatiently. They were not worried about whether it was poisonous or not, so they just grabbed a handful.

Seeing the group of people losing their composure, Liu Chen laughed dumbly and shook his head helplessly.

"The snow is white and clear, like snowflakes. This is the best salt! Jushou said excitedly.

Tian Feng took a bite and was not afraid of the salty taste. He said,"In addition to the unique salty taste of table salt, there is no bitter taste and no impurities.""

"My lord is truly a god!"

Zhao Yun was also full of excitement.

Now that they have salt in Changshan, and they have sweet potatoes, potatoes and other food, they can be said to be completely self-sufficient.

Everyone around them reacted and bowed respectfully to Liu Chen one by one, as if they were worshiping an immortal. General, incomparable admiration!

"Your Highness is truly a god!"

"It's hard for me to catch up to you, and I can't even hope to catch up to you!"

"The master's wisdom is like the bright moon in the sky. The wisdom of ordinary people like us is like a firefly, there is a world of difference!"

"I, Changshan, finally don’t have to buy salt at a high price, and people don’t have to eat less salt just to save money!"

Listening to the excitement of this group of people, Liu Chen smiled and said:"The more salt you eat, the better, it must be the right amount!"

"I'll understand later!"

Everyone looked down at Liu Chen, completely convinced, and didn't even ask why.

"Okay, follow this king's method and you can proceed. If you don't understand anything, I can use this to guide you. Liu Chen waved his hand and said.

Yan Guan and other officials immediately followed the instructions.

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