Iron ore is just speculation, but it gives Nuan Nuan infinite hope. In any case, she had to try to see if she could refine it.

Here's the big problem.

She used to be curious to watch the documentary of the foreign brother's survival in the wild and smelting iron, but she didn't pay attention to it!

No, you have to recall. The current tribe is like a bamboo raft in the stormy sea, in danger of breaking at any time, and with the blessing of iron tools, she believes that the future of the tribe will be more secure.

Mo looked at Nuan Nuan and stared at the little stone in a daze, a little funny, "What's wrong?"

Nuan Nuan came back to her senses, and she said solemnly: "I seem to have found iron ore, maybe, I can make you a dagger." ”

Mo didn't understand the meaning of the dagger, and he smiled and nodded. As long as it is made of warmth, it must be very useful.

He began to look forward to it.

"Is that what you use with this kind of stone?"

"Yes. There are a lot of these little stones around here, let's pick up more, and I'm going to try to see if we can make iron in the next few days. ”

After walking around for a while, the two picked up a lot of iron ore and went down the mountain, and the two of them had no spare hands to pick the grapes, and Nuan Nuan regretted giving up.

Back in the cave, Nuan Nuan was not in a hurry to make iron, where is it so simple, Nuan Nuan still has a lot of things that she hasn't thought through, she needs time to think clearly, how to do it, and make some preparations.

For two days in a row, in addition to carefully taking care of these seriously injured clansmen, Nuan Nuan has been busy planning the big project of ironmaking.

In this ancient world where there is nothing, the difficulty factor of iron smelting is quite large, especially for her as a girl.

As we all know, the most important thing in ironmaking is the need for high-temperature furnaces. However, the current conditions are too poor, so I can only choose to build with dirt for the time being.

She crouched on the ground, wrote and drew on tree branches, and made one miniature version of the furnace model after another out of the clay, but she denied them all, and she had no clue.

Nuan Nuan was a little discouraged, and she threw the branch in her hand out of her hand as if she was angry.

After a while, Nuan Nuan silently ran to pick up the branches, she took a deep breath, and silently thought in her heart: The sky will descend on the people, and they must first suffer their minds, strain their muscles and bones, starve their bodies and skins, empty their bodies, and act chaotically, so they are tempted to endure and benefit what they can't...... The heavens will descend on the Si people......

The impetuous and depressed mood was finally relieved, and Nuan Nuan resettled into modeling.

It doesn't work here, it may collapse, well, this should be fine, hey, if it is changed like this, will the smoke be smoother? Also, the furnace needs a blow, and she can't make a blower? Hey? If this is the case, she can use the natural wind, she is too witty! Nuan Nuan looked at the natural ventilation pit furnace that she had studied with great concentration, and finally had a bottom in her heart.

The problem of the furnace is solved, Nuan Nuan is in a good mood, and even if she can't smelt iron, she can use it if she finds other ores in the future.

The next step is to build a real furnace.

The tribesmen, as always, fully supported Nuan Nuan's actions, Nuan Nuan's heart was very warm, and she was even more determined to get the real iron.

Except for the patrolling and hunting and the injured clansmen, the remaining people helped to burn a large amount of charcoal according to the needs of Nuan Nuan, and by the way, the clansmen are now very accustomed to using charcoal, so the charcoal firing is also very fast.

Mo took people to hunt and did not come back, and now the deputy captain Ah Yang presided, Nuan Nuan asked them to help clear a clearing outside the cave without weeds and stones, and by the way set up a simple wooden shed to prevent rain.

The clearing was cleared out in a short time, and Nuan Nuan took advantage of them to build a small wooden shed, took her small hoe, squatted down, and began to dig a pit.

According to the plan, Nuan Nuan first dug a pit about 80 cm long, 80 wide, 80 cm high. Steep on three sides and gentle on one side.

It's time for mud!

Ah Meng and Shi led people to dig a large amount of yellow clay and put it in a basket and brought it over, which was the task of Nuan Nuan's explanation, and Tuwa also brought a lot of river water.

Nuan Nuan began to mud, Ah Yang looked at it, happy, he would, happy to run over to help. Stone also came to help, and with the addition of men, it was much easier with mud.

The stone is specially related to the mud, stepping on the mud, and the sun and Nuan Nuan are specially responsible for kneading the soil into a boxy earth brick, and Nuan Nuan will put the soft earth bricks on the four circles of the pit, leaving a square air inlet on the gentle side.

Then put another layer of adobe bricks, before putting the third layer of adobe bricks, Nuan Nuan used bamboo pieces to set up a bracket on the second layer on the gentle side, and sealed it all without leaving a hole from the third layer. until the adobe wall is flush with the ground level.

The masonry of the wall was suspended, and Nuan Nuan began to burn the fire, in order to burn the earthen wall and solidify it, so that it could continue to accumulate later.

While the fire was still burning, Nuan Nuan began to pinch the slender and slender grating strips with the soil, and the soil had to be a little dry, otherwise it would be bent and deformed before it was placed.

It is also necessary to make a soil cover with a boxy area larger than the area of the horizontal burner.

The fire is extinguished, and the warmth is until the main furnace is cool, and the seven grill strips are stuck one layer above the air inlet. The purpose of the grille is to prevent the fuel from blocking the air inlet.

This is how much the furnace body is about.

The next thing you need to get is the air outlet, which is the flue.

Nuan Nuan thought for a while, in the opposite side of the air inlet extended outward to build a cylindrical shape and a semicircle, starting from the second layer of the ground level, Nuan Nuan supported the adobe bricks with bamboo pieces, leaving an air outlet to the opposite side, the adobe bricks were accumulated into a cylinder and strong upward, and there were about fifty centimeters in the flue, Nuan Nuan began to ignite again.

This time, in addition to the dead leaves, some charcoal was poured on the grille inside the main body of the furnace and burned on the clay cover, and after a while, the flames grew bigger and bigger, and came out of the flue.

When the fire is almost extinguished, Nuan Nuan continues to raise the chimney until it reaches two meters.

Nuan Nuan finally made a naturally ventilated high-temperature furnace, and she couldn't wait to put these small pieces of iron ore into it. Then some charcoal was added.

Nuan Nuan squatted beside the furnace, her eyes shining, she believed that she was lucky and that she would succeed.

She dismissed a large group of people, and now there was nothing to do except add charcoal and watch the fire, now there was only waiting.

Nuan Nuan didn't know how long it would take to make iron, and she had to keep experimenting.

At sunset, Mo also returned, in addition to many prey, there were also a large number of grapes, Nuan Nuan was so happy, she couldn't help but climb Mo Gao's neck and gave a fragrant kiss.

The mood was good, and all fatigue disappeared suddenly.

"Nuan Nuan, show me what you did today?" Mo scratched her pretty nose;

"It's called an automatic ventilation furnace, and it should be able to burn iron, and iron can do a lot of things. You'll find out later, and I promise you'll love it. Nuan Nuan said with a smile.

Mo was amazed around the furnace, his Nuan Nuan was really not an ordinary person, and it seemed that there was no difficulty in defeating her.

Nuan Nuan removed the soil cover every hour to observe, but unfortunately the fire hit people, and he couldn't see the situation inside at all, and he was afraid that he couldn't refine it, so Nuan Nuan had to keep adding charcoal.

When Nuan Nuan was in middle school, she learned that charcoal and oxygen combustion produce carbon dioxide, but charcoal is not pure charcoal, so it leads to the accumulation of a lot of ash falling from the top of the grating at the air inlet under the ground level, and Nuan Nuan needs to be cleaned out regularly.