Chapter 35

For the people of gaoshu tribe, iron is a treasure, just like horses. Irrespective of iron pots, spades, shovel or small knives, even if these irons are made of pig iron of very poor quality, for those who are not smelted by metal, these iron weapons that are much harder than stone and bone are gods gifts.

Horses and irons were the main goods that the Indians traded with the vassichus. The colonists from Europe didn't even have to pay. They just needed to buy some unwanted iron garbage in Europe and pull it to North America to exchange precious and gorgeous fur with the local Indians.

As the aborigines living in the easternmost part of North America, the gaoshu tribe has been in contact with the vasichus since more than 100 years ago, so there are still some ironware in the tribe.

However, like shovel and hoe iron, there are not two or three tribes in the tribe, so most of the people work with rock shovels and stone hoes, and some of them start to live in mud. Others who did not dig were sent by the stone bear to pull coal and limestone, kaolin and iron ore.

Almost all the members of the tribe went out, and the strong men, needless to say, the women with the same physique did the same work as the men. Older people, with their children, act as transport brigades, and they use the few cars in the village to pull those things.

The people of gaoshu tribe live in wooden houses, so there are skilled carpenters in the tribe. Especially after contacting with the vasichus, these carpenters exchanged fur for a complete set of woodworking tools from vasichus, which greatly improved their craftsmanship.

Several carpenters in the tribe got together and began to figure out how to make what the guardian called "bellows" according to the plan mentioned by stone bear before.

"Why dig such a big hole?" Kabulu stood beside the stone bear and asked curiously. Her eyes were always wandering between the living mud people and the digging people. The leader of the tribe, Li Lei, sat aside and looked at the scene with the same interest.

For them, what happened before their eyes was something they had never seen before, and curiosity was inevitable.

Li Lei also raised his ears. He also wanted to hear why the guardian wanted the people to do these things.

Strange to say, Li Lei, who seemed to be dying some time ago, has now slowed down. His face is no longer so pale, but more red, the most important thing is that he is not like some time ago as can only lie, now he can even sit up.

This kind of change makes the stone bear wonder.

However, for the improvement of leader Li Lei, Shi Xiong still agrees. After all, Li Lei is very supportive of himself now, especially after he killed a big red deer and a bison alone, Li Lei leader's support for himself is more obvious.

Just like today's mobilization, if Li Lei doesn't speak, the people won't listen to his guardian.

"It's very necessary to dig this pit. After the pit is dug, kaolin is pasted around it, and it can be used for coking after natural drying!"

"Coking? What is coking? " Li Lei asks curiously.

"Coking is the process of converting coal into coke. The wood we use now doesn't burn hot enough to melt the iron ore. And the temperature needed for steel-making is higher than melting iron ore, so let alone charcoal, even coal with higher temperature produced by combustion can not be used for steel-making well, only coke is the best way to make steel. "

After a pause, Shi Xiong continued to explain: "well, this coking is for the future. Now we can use coal for steelmaking. "

For words such as "burning temperature" and "heat", leader Li Lei and kabulu are just like listening to the book of heaven. However, looking at the guardian's confident appearance, they are not aware of it.

As a matter of fact, the stone bear now drives ducks to the shelves. Although he knows something about steelmaking, where has he ever smelted steel? Now he can only make steel according to the methods mentioned in the data obtained in previous lives.

For example, in coking, the stone bear has only heard about it and seen it in the video, but if you ask him to coking, he is also a rolling pin blowing fire.

And how to make firebricks, and he never did that.

But the problem is that it's all like this now, so we have to stick to it.

After all, the most important steel-making materials are available, and the main materials for making refractory bricks are also available, so stick to it.

The big deal is that good steel can't be smelted. Can't we still smelt weak steel? I can't do it. It's possible to make raw iron or cooked iron!

Kabulu pointed to the big pit that had just been dug out and asked, "big bear, why do you want to build a house with stones next to that big pit? Do you want to live here? Do you dislike your house? "

The stone bear was embarrassed by this question. After thinking about it, he said, "the house built with stones is not for people, and I don't plan to live there. This room is for me to burn firebrick. Well, when making steel, the temperature inside the furnace is extremely high. If you don't use special refractory bricks, the furnace will be cracked or even burst. Therefore, you must use refractory bricks that can withstand high temperature to build the furnace wall, so as to ensure the safety in the process of making steel. "

The reason why Shi Xiong did this is that when he studied ancient steelmaking in his previous life, he also referred to modern steelmaking technology. He remembers that he once saw a report on using coking waste heat to burn bricks in an article.

A large amount of waste heat will be generated in the process of coking. This waste heat is the waste gas with a temperature as high as 600 to 900 degrees. Theoretically speaking, the high-temperature waste gas generated during coking can be used to do many things, such as power generation and refining some chemical products. However, using coking waste heat to burn bricks is only one of the most rudimentary applications.

Firing brick needs coal or charcoal burning to produce high temperature and high heat to sinter the brick, and finally burn the finished brick. The temperature of waste gas from coking is even higher than that from charcoal combustion, which is more than enough for brick burning.

Shi Xiong once saw the report of using coking waste heat to burn bricks. According to the information, the qualified rate of bricks made from coking waste heat is as high as 99%. Most importantly, this technology has been very common in previous generations.

That's why Shi Xiong decided to make a refractory brick by coking!