Early the next morning, Ren Baqian went out to meet Tong Zhenye, accompanied by the Ordnance Department Qing Feng Throat, and the Ordnance Department Shaoqing Sha Hongbo, and the group went straight to the outside of the East City with the guards.

Ren Baqian rode a horned ox, the most common mount in the Dayao Plain, mixed in the crowd, twisting and twisting from time to time, as if there were nails underneath, this thing was really uncomfortable to ride, much worse than the Wangshan bird.

But it takes a lot of courage to ride a lookout bird in the crowd, not to mention the immediate sense of BMW crowd mixed into an Alto, that faint but straight into your nose stench is enough to push most people far away.

The direction of the east gate of Lancheng is still the first time to go, out of the east city and then go forward two pillars of incense, then turn to the north and walk for half an hour to see a small hill, you can see the black smoke coming out there, and then get closer to see a circle of rocks in front of a one-person high wall, there is a gate in front of it, it is deserted, this is the Jingtian furnace.

The iron ore of Liucui Mountain is generally smelted in the town outside the mountain first, and then transported here like the iron ore of Da Mo Mountain.

The guards opened the door when they saw the group from afar, and when they entered, they could see a large open space, sparsely piled with iron ore and copper ore that had been initially smelted, as well as large piles of dried firewood.

And the ore that Ren Baqian saw in the Ministry of Industry yesterday was also transported over and piled aside, and someone was crushing it.

A few big men with a cross-faced face first put the limestone mine on an iron plate, and then slapped it down, and it directly became a pile of small pieces, and after a while, a pile of gravel appeared on the iron plate, and then someone transported it to the iron plate on the other side, and there was a huge stone mill on it, which was similar to the light mill in front of the road roller, and the two people pushed the huge stone mill forward left and right to press directly on the gravel and it became a pile of smaller years, and then pushed it back.

After a few times, there was an extra piece of stone powder and a small amount of debris on the iron plate, and someone received it and sifted out the powder with a sieve.

When everyone turned their heads to see their gravel turned into powder, the people from the Ministry of Engineering hurriedly came out to greet them and led everyone inside.

It is said that it is an earthen kiln, rather a cylinder made of clay, with a diameter of two meters and a height of three meters, and the iron ore is placed in it and then placed a large amount of firewood to melt, which is very slow, and it is necessary to add a relatively rare firewood called wood-burning to push the temperature to the point where it is enough to melt the iron.

The molten iron will then flow down a trough below.

The iron obtained in this way is very soft, and there are many impurities in it, and it takes a lot of time for the craftsman to hammer out the impurities after heating.

It can be said that such a method of molten iron and wrought iron is quite inefficient, not to mention time-consuming, and the consumption of firewood is also extremely large.

As Ren Baqian walked, he listened to the officials of the Ministry of Industry of Jingtian Furnace introduce the process here, and nodded to show that he understood.

However, when Ren Baqian walked inside, he also saw a large box with a height of one person next to several iron melting furnaces, and someone kept pushing the wind into the melting iron furnace.

It's the bellows that Ren Yaqian and the wind throat said last time.

"With this bellows, the temperature in the furnace has increased a lot, and the ironmaking speed has been much faster. I would like to thank Ren Fucheng. Wind Throat nodded and said to Ren Baqian.

The official of the Ministry of Industry looked at Ren Baqian when he heard this, and from the words of the wind throat, he could tell that this blower was proposed by him?

"When will the other bellows be ready?" said the Ministry of Works official.

"It's going to be fine in two days. The Ministry of Works official hurriedly replied.

"Is the cement raw material prepared according to the proportion?" Ren Baqian asked Tong Zhenye, Tong Zhenye looked at the wind throat, the wind throat looked at Sha Hongbo, and Sha Hongbo looked at the official.

"My lord, are you the stones you sent yesterday? The official hurriedly said.

Ren Baqian swept the eyes of several people, looking at them one by one, and thought to himself that he might as well ask this official at the beginning.

"What do you call it?"

"Lord Fucheng, the lower official is the Jingtian furnace supervisor, just call me Tiemu, if you don't understand anything, you can ask the lower official. Temu said with his fists clenched. The husband chosen by the empress, the only one in the entire court who is not from the Gu clan, can be recognized by anyone.

Not to mention being an official in Lancheng.

"Bring in the cement raw material. Ren Baqian nodded: "Let's see what the effect of burning it is." ”

Next, someone brought the cement corn starch, and Ren Baqian looked at it, and it was all sifted out of powder.

Then find an empty stove and add firewood to it, and then fill the hollow core pillar made of clay with fine holes and put it into the empty furnace, and after a while, heavy smoke rises from above the earthen furnace and spreads around, and everyone retreats to look away.

In order to make the temperature meet the requirements of Ren 8000, there was also a person who covered his nose in the thick smoke and pulled the bellows, coughing twice from time to time, and then someone replaced him.

"How long will this burn?" asked Tong Zhenye.

"It shouldn't take too long for the temperature to reach it. Ren Baqian was not sure, the only information he got was what kind of changes the cement had at a certain temperature, but he didn't say how long it would take to burn.

"Let's try burning bricks again. Ren Baqian looked at the empty earthen stoves around him and said.

Originally, I was going to build a brick-burning stove after the cement was burned, but now looking at this kind of earthen stove, Ren Baqian thinks that he can try it, and he is idle anyway.

They have also taken back the clay for a while, although it has not been dried, but it has been weathered long enough, and it should be enough to burn the bricks.

Then, according to his instructions, the craftsman of Jingtian Furnace began to pour clay powder into the trough, add water and stir it into a puree, then kneaded out brick embryos, placed them in a circle around the wall in the earthen furnace, and then added wood to the middle and began to calcinate.

"I'm afraid this will burn for about ten days, and don't break the fire in the middle. Ren Baqian said to Tiemu, and Tiemu hurriedly wrote it down.

Until now, he doesn't know what these bigwigs are going to do to burn mud, anyway, they will do what they arrange, and now Jingtian Furnace has nothing to do, and he has to be idle for at least half a month in a month.

The cement was fired quickly, and the fire was turned off before dark to cool down quickly, and then the clay jar was taken out and the cement inside was poured on the ground. Originally, it had been sintered into lumps inside, but when it fell to the ground, it shattered into small pieces.

Everyone looked at Ren Baqian with their eyes, this is what he said about cement that is similar to a stone?

Ren Baqian squatted next to the pile of clinker and grabbed a handful of it with his hand, and there were some more crystals like glass on his hand, which were sintered at high temperature just now. ，

"Huh, this is a gem?" Windthroat was surprised at first, and then his face showed that he had discovered a great secret.

When I sent it in, it was obviously soil, but when I came out, how could there be a gem in it? Although it was very small and broken, and the value was not high, it was also a gem, and it was much more valuable than this soil.

Although things are not burned into stone as Ren Baqian said, if they can be burned out of the soil, this is also a big improvement.

But everyone immediately began to think about it.

Where did you dig the soil? Tomorrow we will send someone to dig up the soil.

"It's glass, or glass-like crystals. "Ren Baqian's eyes are squinted, and his face is uneducated, which is really terrifying.

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