A month later, Qin Zhao walked in the brand new silver kiln in Yinshan, Batou.

The silver kiln used the ash blowing method to refine silver has been built and mass-produced silver has begun.

The first workshop of the silver kiln was a gravel workshop that made the ping-pong sound. The first step was to smash the silver ore dug out of the mine into powder. The powder was ground by a large steel grinding and grinding very finely, looking like flour.

The second workshop was built on a stream, and the powder was roughly processed by the wave washing method, and the extremely light limestone dust and silica powder were washed away with stream water. According to Qin Zhao's estimate, this step of screening can eliminate powder with a silver content of less than 5%. After all, the powder itself has been ground very fine, and the silver content is less than 5%, and its refining value is not very high.

The third workshop was more professional, and began to prepare for the mutual melting of lead and silver. The craftsmen in this workshop used rice paste to paste the silver-containing powder into a ball, and then wrapped it with charcoal powder outside the silver powder, and wrapped it with a thick layer.

The large furnace in the workshop began to calcinate the porcelain stove built by the porcelain craftsman at high temperature, increase the temperature in the furnace to more than 1,200 degrees, and then put lead blocks into the furnace. After the lead blocks are completely melted, the silver powder wrapped in charcoal powder is put into this extremely high-temperature furnace.

Then use steel bars to keep stirring the furnace.

This is the most critical first step in the ash blowing method.

Qin Zhao specially invited porcelain craftsmen to burn such high temperatures to make the stove.

When the silver powder and the lead blocks melt and mix together, the silver elements in the silver powder are all sucked out by the molten lead water. At high temperatures, even if the silver elements scattered in the powder are only 5% or 10% pure, they will liquefy and become very active, and fuse them with lead.

The temperature in this workshop was extremely high. Qin Zhao only stood in the workshop for ten minutes and then sweated after being hot. You should know that it was already the 11th month of the lunar calendar, and everyone had to wear cotton jackets outside the workshop.

Every time the craftsmen burn, they will break the stove and use a spoon to scoop out the dregs above the melt. These dregs are the dregs of rocks that do not contain silver, mostly calcium carbonate and silica.

After all the residue is scooped out, the remaining red hot lead-silver alloy in the stove is.

Pour this alloy into a specially made graphite crucible furnace, burn the crucible at a high temperature again, burn it to 1,600 degrees, and then blow the crucible with a blower. The lead metal in the furnace will oxidize rapidly at this temperature, and countless lead flowers will gush out. These lead flowers are solid, but lighter than liquid silver, and float above the silver like dregs.

Not only lead will oxidize, but other elements in the silver lead alloy will oxidize at this temperature and turn into floating residue.

Snap up and throw away the residue one by one.

The metal under the crucible furnace is silver with excellent quality.

Qin Ning, Zhao Liangce and Qin Zheng followed Qin Zhao to visit various workshops, and were stunned.

How could Brother Zhao know that such a magical method of silver refining is so complicated and has many procedures! Such silver refining technology greatly increases the output of Batou Yinshan!

In fact, there were only a few generals stunned? Even the hard laborers in the mines who actually operated the stove were stunned. They used the sand tao method to save money for their entire lives, and for the first time they heard that they could suck out the silver powder in every stone like this and refined so much white silver!

Qin Ning calculated with his finger: "Governor, there was no such silver-burning kiln before. The workers in the mine were busy and could dig 3,000 kilograms of ore a day. These ores could produce more than 20 kilograms of silver after being washed by sand. However, a large amount of low-content ore was abandoned, which was awesome."

"Now, use the ashes blowing method of Guardian to burn silver, and three thousand kilograms of ore can burn fifty kilograms of silver."

Qin Ning stuttered as he spoke, and he became a little stuttered.

"The Guardian... The Guardian's method of refining silver has increased the output of Yinshan... It will be more than doubled."

Qin Zheng took a breath and said, "The Guardian is really the starry sky! I have never heard of this ashes blowing method to refine silver."

"I haven't heard of it!"

"I haven't heard of it, and I didn't expect the effect to be so great!"

Qin Zhao smiled and thought to himself that you guys must have never heard of it. The silver burning process used by Qin Zhao is an improved version of the ash blowing method, which is the technology improved by the Spanish in Chile in the 18th century. From the technical level, Qin Zhao's ash blowing method was the best in the world in this era.

The simple version of the ash blowing method was found in the Ming Dynasty in the late Ming Dynasty. It was considered the most advanced silver mining method and was only used in a few silver mines in the north. This technology has not yet been introduced to the south. Qin Zhao's ash blowing method in Batou Yinshan should be used for the first time in the Lingnan area.

Zhao Liangce said: "Governor, if all the ores are savaged like this and do not waste at all, then wouldn't this mine produce 200,000 taels of silver annually?"

Qin Zhao nodded and said, "Only more and less!"

Qin Ning, Zhao Liangce and Qin Zheng both took a breath of cold air.

Qin Zhao was really Lu Ban alive. A silver mountain with an annual output of 90,000 taels of silver was turned around in Qin Zhao's hands, and immediately turned into a mine with an annual output of 200,000 taels of silver.

Whenever things come to Qin Zhao, they will burst out with incomparable light due to the introduction of technology.

Even the three generals were the same. They were originally farmers who dig food in the fields, but Qin Zhao pointed out and trained them a little, and now they have become commanders with hundreds of troops, and they have always won battles.

Qin Zhao's methods are really amazing.

Qin Zhao looked around the silver refining workshop and patted the dust on his hands.

"Okay, the Hui Chuanfa Workshop has been built, and then the Yinshan Mountain in Batou will be on track. From now on, the Yinshan Mountain will transport silver to Jinghaiweibao in Xiangshan County every three days and send someone to escort it. There will be no silver on the Yinshan Mountain to avoid being jealous of the covetous."

Everyone took the order with a loud bang.

Qin Zhao nodded and walked out of the hot workshop.

...

A thousand soldiers walked on the road at the south ferry crossing of Guangzhou City with their baggage drivers with their heads held high.

Guangzhou City was crowded with people, and they rushed to the road to watch Qin Zhao's soldiers.

After all, Guangzhou City is not far from Longmen County, and the people all know that the Batou bandits are harmful to the people in Longmen. However, this time the Qiming Group destroyed this group of all evil bandits at one time, and did not offend the people along the way. It is self-evident what kind of army the Qiming Group is.

The people of Guangzhou stood on both sides of the road with well water, rice wine and fruits, and welcomed the soldiers of the service regiment.

Whenever an officer riding a horse rode over, the people would scream deafeningly.

Qin Zhao rode on the horse, and wherever he walked, there were sounds of roaring mountains and tsunamis.

"Good Master Guard!"

"The Master of War is a Bodhisattva who saves the suffering and the suffering!"

"The Guardian saved the people of Longmen County."

Qin Zhao smiled without saying a word all the way, and occasionally bowed to the people around him, which often caused even more sensational cheers.

When they walked far away from the ferry, there were fewer citizens in Guangzhou. Qin Zhao saw Qin Youli and a hundred young and strong men standing on the right side of the road waiting for Qin Zhao.

All the one hundred people stood straight, although they were of different heights, fat and thin, but they were all very energetic.

Qin Zhao rode over and asked, "Old accountant, are these hundred people your new soldiers?"

Qin Youli grinned and said, "Yes! Master Guard! According to Master Guard's instructions, I recruited a thousand new recruits this time, which is the most energetic one hundred of them."

Qin Zhao nodded and said, "You did a good job."
Chapter completed!