Hurrying all the way, Liu Chen and the others finally came to the salt mine.

After more than a month of construction, the salt mine has faintly formed the style of a small factory, and the surrounding area is guarded by the Changshan Legion to avoid accidents.

"Your Highness!"

Salt officials and other officials saluted respectfully.

Liu Chen said straight to the point: "Prepare fine sand, coarse sand, charcoal, limestone, natural alkali, a piece of cloth, string, and boiled water." The most important salt is not forgotten. "

"Yes."

Yan Guan and the others immediately went down to deal with it, and soon all the tools were ready.

Frustrated, Tian Feng, Zhao Yun and the others watched with a curious face.

Officials such as the salt official were even more preoccupied.

Liu Chen looked at a large bag full of coarse salt, which was the coarse salt that was first pumped up from the underground brine of the salt mine, and then crystallized by decoction.

This is the salt production method of the ancients.

The particles are large, bitter, full of impurities, and some invisible toxic substances are not filtered clean, eating too much harm.

Liu Chen pointed to the coarse salt and said

"First pour the coarse salt into the wooden barrel and let it sit for more than two hours.

"After the impurities such as sediment have completely settled, the upper clear liquid is drained into another clean wooden barrel with a thin tube."

Everyone nodded one after another, very focused, and the little official immediately did as Liu Chen ordered.

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

Liu Chen found a new wooden barrel, chiseled the bottom, and then covered the hole with a cloth and tied it with a string.

Then fine sand is poured in, about one-fifth of the height, and then charcoal is loaded into it to act as activated carbon, and finally filled with coarse sand.

This simple filter is complete.

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

After the officials poured the melted brine, after filtering it through coarse sand, charcoal and fine sand, many impurities in the brine were filtered.

Everyone was pleasantly surprised!

"Your Highness is really a god man, he can think of such a filtering method!"

"Is this the salt method?"

"I see that the salt water is much clearer, and this salt water must be free of impurities after decoction!"

Liu Chen was speechless in his heart, this group of people was too fast, he said lightly: "This is just rough filtration, and there is a process behind." "

Everyone was dumbfounded and embarrassed!

Liu Chen pointed to the limestone and said: "If you heat and burn it with charcoal, this thing will turn into quicklime, and then you can make lime milk by adding water." "

The little official immediately did so, and these trivial things naturally did not need Liu Chen to do it himself.

Then soon after, a saturated solution of lime milk appeared.

"Lime milk is poured into coarsely filtered brine for stirring, and lime milk reacts with magnesium ions in the brine to form magnesium hydroxide precipitation."

Liu Chen said all the professional terms of later generations.

Everyone looked at each other, still a little embarrassed and asked, "Master, this magnesium ion?" Magnesium hydroxide? What is it? "

"This is chemistry, and you can go to the library and read books." Liu Chen explained simply.

Everyone nodded one after another.

Frustrated and Tian Feng looked at each other, extremely embarrassed.

In front of Liu Chen, they were like fools!

"This step removes magnesium ions from the water and also removes bitterness. Repeat the first step to take the upper layer of the clear liquid. Or quickly with carbon adsorption. "

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

"Natural bases are then added, which react with calcium ions in the brine to form calcium carbonate precipitates."

"This step removes calcium ions from the water and also removes astringency. Then repeat the first step to take the supernatant. Or quickly with carbon adsorption. "

Liu Chen continued.

Frustrated and Tian Feng opened their mouths, and finally chose to close it!

What the hell is this calcium ion, calcium carbonate, they also don't understand! But it is estimated that it should also be a chemistry-related problem!

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

Frustrated and Tian Feng looked at each other, they were Liu Chen's advisers, they didn't know this knowledge, wasn't it a joke?

Zhao Yun is not under pressure, he is a martial general, and there is no problem if he does not understand this aspect!

However, Liu Chen's light breeze and calm erudite demeanor still aroused the worship and admiration of everyone around him!

Such a troublesome method, only His Highness can come up with it!

After waiting until the brine stopped producing turbidity, Liu Chen continued: "Next, distill the crystals. "

The official immediately went and did so!

Everyone had an expectant look on their faces, after working hard for so long, it depended on the final result!

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

Their serious table salt is no longer coarse, magazine coarse salt, but snow-white refined salt!

"This, try it quickly..."

The salt official said a little excitedly, but then he couldn't wait, he directly stretched out his finger to stick a little taste, and then said with an excited face:

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

Frustrated and Tian Feng, as well as Zhao Yun, also couldn't wait to rush over. They were not afraid of whether there was poison or not, and directly grabbed a handful.

Looking at the gaffe of this group of people, Liu Chen smiled dumbly and shook his head helplessly.

"The snow is white and clear, like snowflakes, this is the best salt!" Frustrated, he said excitedly.

Tian Feng tasted it, and was not afraid of saltiness, and said: "In addition to the unique salty taste of salt, there is no bitter taste, and there are no impurities. "

"Lord Gong True God and Man too!"

Zhao Yun's face was also full of excitement.

Now that they have salt, sweet potatoes and potatoes, they are completely self-sufficient.

Everyone around reacted, and one by one saluted Liu Chen respectfully, just like worshipping immortal gods, incomparably worshipping!

"Your Highness is really a god and a man!"

"It's hard for me to wait for the horse to be beaten, it's hard to look back!"

"The wisdom of the Lord is like the moon in the sky. I wait for the wisdom of ordinary people, but it is like a firefly, it is simply a world of difference! "

"I Changshan finally don't have to buy salt at a high price, and the people don't have to eat less salt in order to save!"

Listening to the excitement of this group of people, Liu Chen smiled and said: "Salt is not the more you eat, the better, you must be in moderation!" "

"I'll see!"

Everyone threw themselves at Liu Chen's five bodies, completely convinced, and didn't even ask why.

"Okay, according to King Ben's method, you guys will operate. If you don't understand anything, I can use it to guide you. Liu Chen said with a wave of his hand.

The salt officials and other officials immediately complied.

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