After rushing all the way, Liu Chen and the others finally arrived at the salt mine.
After more than a month of construction, the salt mine looked like a small factory, and the Chang Shan Army was guarding it to prevent any accidents.
"Your Highness!"
The salt officials and other officials bowed respectfully.
"Prepare fine sand, coarse sand, charcoal, limestone, trona, a piece of cloth, string, and boiled water." Don't forget the most important salt."
"Yes."
The salt official and the others immediately went down to deal with it. Soon, all the tools were ready.
Qiushou, Tian Feng, Zhao Yun, and the others watched curiously.
The salt officials and other officials were even more focused.
Liu Chen looked at the big bag full of coarse salt. This was the coarse salt that was first extracted from the underground salt mine and then crystallized through boiling.
This was how the ancients made salt.
The grains were large, bitter, and full of impurities. Some invisible toxic substances were not filtered clean, and eating too much was harmful to the body.
Liu Chen pointed at the coarse salt and said,"
"First pour the coarse salt into a wooden barrel and dissolve it with water. Let it stand for more than four hours.
"After the sand and other impurities have completely settled, use a thin tube to drain the upper layer of clear liquid into another clean wooden barrel.”
Everyone nodded their heads and were very focused. The small official immediately followed Liu Chen's instructions.
Liu Chen continued," There's another way. It's faster. It's carbon absorption."”
Liu Chen found a new wooden barrel, chiseled through the bottom, covered the hole with a cloth, and tied it with a string.
Then, he poured in fine sand, about one-fifth of the height, and then filled it with charcoal to serve as activated carbon. Finally, he filled it with coarse sand.
This simple filter was completed.
"This is a carbon absorption method. It uses the principle of charcoal absorbing impurities to filter out the impurities in the salt water. Fall down…"
After the minor official poured the dissolved salt water into the pot, he filtered it through coarse sand, charcoal, and fine sand. Many impurities in the salt water were filtered out.
Everyone was pleasantly surprised!
"Your Highness is really a god, to think of such a filtering method!”
"Is this the salt-making method?"
"I see that the salt water is much clearer. After boiling this salt water, there must be no impurities!”
Liu Chen was speechless. This group of people flattered him too quickly. He said indifferently,"This is only the rough filtering. There are still processes after that.”
Everyone was speechless and embarrassed!
Liu Chen pointed at the limestone and said," Burn it with charcoal fire. It will turn into quicklime. When the time comes, you can add water to make lime milk."”
The minor official immediately did as he was told. Liu Chen naturally did not have to do these trivial matters personally.
Soon, a saturated lime milk solution appeared.
"Pour the lime milk into the roughly filtered salt water and stir it. The lime milk will react with the lithium ions in the salt water to form a deposit of lithium.”
Liu Chen spoke out the professional terms of the later generations.
Everyone looked at each other and Qiushou asked awkwardly,""My lord, this is the lithium ion? Magnetite? What is it?"
"This is chemistry knowledge. You can go to the library to read related books.”Liu Chen explained simply.
Everyone nodded.
Qiushou and Tian Feng looked at each other awkwardly.
In front of Liu Chen, they were like fools!
"This step can remove the calcium ions in the water and also remove the bitterness. Repeat the first step and take the upper layer of clear liquid. Or we can use carbon absorption to do it quickly."
Under Liu Chen's instructions, the small official poured the salt water into the filter again, and all the lithium ions were filtered out.
" Then, we add trona. This will react with the calcium ions in the salt water to form a calcium carbonite deposit.”
"This step can remove the calcium ions in the water and also remove the astringent taste. Then, he repeated the first step and took the upper clear liquid. Or we can use carbon absorption to do it quickly."
Liu Chen continued.
Qiushou and Tian Feng opened their mouths but chose to close them in the end!
What the hell was this calcium ion and calcium carbonate-they also didn't understand! However, it was probably a chemistry related problem!
"Looks like I'll have to go to the library to read some chemistry books when I get back.”
Qiushou and Tian Feng looked at each other. They were Liu Chen's advisors. If they didn't even know this bit of knowledge, wouldn't they be a joke?
On the other hand, Zhao Yun did not feel any pressure at all. He was a general, so it was not a problem for him to not understand this aspect!
However, Liu Chen's calm and collected demeanor still attracted the admiration and respect of the surrounding people!
Only His Highness could think of such a troublesome method!
After the salt water was no longer turbid, Liu Chen continued,"" Next, we'll distill the crystals."
The officials immediately did as he was told!
Everyone's faces were filled with anticipation. After working hard for so long, it was time to see the final result!
When the salt water was crystallized into table salt, everyone was completely shocked!
Their salt was no longer thick and coarse salt, but snow-white refined salt!
" Well, let's give it a try…"
The salt official said excitedly, but then he couldn't wait. He stretched out his finger and tasted it. Then, he said excitedly,
"Your Highness, there's no more bitterness!”
Qiushou, Tian Feng, and Zhao Yun also rushed over impatiently. They were not afraid of the poison and directly grabbed a handful.
Liu Chen couldn't help but laugh when he saw the group of people losing their composure. He shook his head helplessly.
"It's snow-white and clear like snowflakes. This is high-grade salt!”Qiushou said excitedly.
Tian Feng took a bite and said,"Other than the unique salty taste of salt, there is no bitter taste, and there are no impurities.”
"My lord is truly a god!"
Zhao Yun was also excited.
Now that Chang Mountain had salt, sweet potatoes, potatoes, and other grains, they could be said to be completely self-sufficient.
The surrounding people reacted and bowed respectfully to Liu Chen as if they were worshipping a god!
"Your Highness is really a god!"
"It's difficult for us to catch up with him!”
"My lord's wisdom is like the bright moon in the sky. The wisdom of ordinary people like us is like a firefly. It's simply the difference between heaven and earth!”
"My Chang Mountain finally doesn't have to buy salt at a high price. The commoners don't have to eat less salt to save!”
Liu Chen smiled and said,""The more salt you eat, the better. It must be in moderation!”
"We understand!"
Everyone prostrated themselves in front of Liu Chen, completely convinced. They didn't even ask why.
"Alright, follow this king's method. If there's anything you don't understand, I can use this to guide you.”Liu Chen waved his hand and said.
The salt officials immediately followed.
This book comes from：m.funovel.com。