The infrastructure of the resource base has been completed, and Renault returns to the Rainforest Camp, which has been under construction for a month, and at least not as much as when he first arrived, leaving a large number of guards on guard every night.

The beasts of the underground world are very strange, the purple-skinned pig has no brains, and has attacked the camp several times at night, and has been killed by thousands, and is still not afraid of death. The camp guards preferred to attack the triangular beast, but this creature was obviously smarter than the purple pig, and after two failures, it never came again.

Fortunately, the hunting team harvested abundantly every day, and with pearl rice as a supplement, there were a lot of fruits in the rainforest, and life was not bad.

Now in the rainforest, the Underground Beast has never been seen again.

Ruan Ling and Bai Qiang had already sent it out, she received a new batch of airships, went to Zotye to buy grain again, and took away a batch of iron tools that had just been made. The camp was moved to the rainforest, and the previous fine iron plate could not be used for the time being, coupled with Renault's guarantee, Zhang Tan was relieved to use iron boldly.

"Sir, you are back. I have tried the orange coke you sent back, the effect is very good, the first large shaft furnace has been started, and now we are not short of iron, but the ground here is too soft, the blast furnace can not be built according to the design, only the third furnace can be built, a furnace out of about 1,000 catties of iron. Before Renault could take a sip of tea, Zhang Tan came to the door, and Balabala kept talking.

"What? You said that the first blast furnace has been put into operation? How is it possible?" Renault was stunned, orange coke is easy to use, but the temperature of that thing is too high, what kind of blast furnace did Zhang Tan build? Didn't you burn the blast furnace?

"yes. Zhang Tan looked puzzled, what is the reaction of Mr., isn't it the task in the plan given by Mr. now?

"But...... The temperature of orange coke is very high, what do you use to make the crucible?" Renault felt as if he had thought something wrong.

"It's a graphite crucible? How can it burn out, the temperature of orange coke is quite high, so I added some loess to it. Zhang Tan said as a matter of course.

it!

Yes, there is no way to solve it if the temperature is not enough, there is too much temperature, there is no need to be as complicated as he thinks, just add something to the orange coke and reduce its combustion value, poor Renault lost his hair in distress, and traded with the four brothers in exchange for high-temperature resistant materials.

Fortunately, this is not useless work, ordinary fine iron, the current blast furnace is enough, Renault will not be satisfied with the status quo, in the future to develop various alloys, in terms of weapon manufacturing, tungsten, manganese such as high melting point metals are necessary.

In addition to this, there are also metal species found here that are not found on Earth, and several of them have a higher melting point than tungsten.

A high melting point is not necessarily useful, like gold is a metal with a high melting point, few people use it to make weapons, in addition to being good-looking, it looks rich, the practicality is not good, and the steel is good, and it can only be used to plate the outer layer.

"Well, how much fine iron do we have now, and what is the quality?" asked Renault.

"There is only one No. 3 furnace, the output is not large, barely flat, and when the next few blast furnaces are built, we will not be able to use up more refined iron. As soon as he talked about this industry, Zhang Tan was excited to dance, this is a paradise for craftsmen, and there is an endless supply of high-grade iron ore.

"Have you started using the stone crusher and powder machine that you prepared earlier?" asked Renault.

Zhang Tan nodded again and again, his eyes were full of admiration, Mr. is too powerful, after the broken iron powder, the smelting effect makes him crazy.

Da Chu craftsmen, limited by knowledge and technology, can only simply smash large pieces of ore small, this is already a considerable project, simply can not be like the modern industry, first make ore powder, and then smelt.

The difference between melting large ores and molten iron powder in the form of powdered iron is very large, both in terms of efficiency and quality.

Smelting is a very complicated process, first mining ore, then beneficiation, throwing away the low content, and then using a stone crusher to make the large pieces smaller, and then entering the powder machine, beating into ore powder, but also after washing, and finally entering the blast furnace is the same size, clean ore powder.

Dachu smelting, but there are not so many processes, except for ore selection and smashing small, everything else is saved. As a result, a lot of fuel and time are wasted, and the iron produced is not only of poor quality, but also in small quantities.

It's not that the craftsman doesn't know about improvement, but the price to pay for improvement is too great, and when this price exceeds the value of the iron itself, it is better not to change it.

Renault has all kinds of simple equipment drawings, which have been handed over to Zhang Tan, and now they have been manufactured and put into use.

The crusher is a bit like a concrete mixer, throwing large pieces of ore into it, making it rotate constantly, and the large pieces of ore in it hit each other, or it won't be long before they become small pieces.

In fact, it can also be designed as an air hammer-like stone smasher, and the effect will be better, which is the next plan.

The power source is an underground river, which does not require manpower at all, as long as the quantity is large enough, the processing is very fast.

The principle of the powder machine is the same as that of the stone mill, but it is replaced with an iron mill, and a small piece of ore is thrown in, rotated and squeezed, and what comes out is an ore the size of a hand armor.

Don't look at the name of the powder machine, in fact, it can't reach the state of powder at all, but this is already like a miracle for the craftsmen of Da Chu.

After crushing the ore, washed by the underground river, for this Zhangtan mobilized nearly a thousand coolies, the underground river was rerouted, separated from a tributary, the ore is very dirty, the water after washing the ore, not to mention giving people to drink, even washing hands is dirty, must be separated from domestic water.

It's troublesome, but when the ore powder goes into the blast furnace, you know it's all worth it.

When Renault first arrived in Dachu, he came into contact with the craftsman camp in Dingjun City, and a furnace of ore needed to be smelted for a day, and after Renault improved, it could be smelted in half a day.

Now, with the new process and the high temperature of orange coke, it only takes more than an hour for a furnace, and if it is started day and night, this blast furnace can be smelted six times a day.

Don't think it's a miscalculation, every time you add material, it takes time, this is the No. 3 small furnace, replaced by a large blast furnace, it is normal to spend half a day, and you can smelt tens of thousands of tons at a time.

Such a high-grade thing, Renault does not consider, in his design, the No. 3 furnace is a thousand catties, and the daily output of five thousand catties is enough.

The No. 2 furnace is twice as large, two thousand catties per furnace, which is already one ton, and the same five furnaces a day.

The No. 1 furnace is powerful, a furnace is 4,000 catties, a full two tons, and a daily output of ten tons of refined iron.

Brothers, don't laugh, this output, in Da Chu, there is really no one. A furnace produces 10 tons per day, with an annual output of more than 3,600 tons, and what is smelted is not iron, but steel.

A No. 1 blast furnace alone, according to the design output, has already exceeded the national output of fine iron, and such a blast furnace, Renault is actually in the plan, ready to build at least 100.

When he first got the plan, Zhang Tan was dizzy for several days, Mr. must be crazy, not to mention that it is impossible to achieve, even if it is really done, so much refined iron will not be used up, and the people of Dachu will not eat in the future, and they will change to **iron?

Da Chu lacks refined iron, but in this era, the usefulness of refined iron is actually quite limited. Mainly in the military field, used to create armor weapons, in the civilian direction, mainly iron pot kitchen knives, and then nails, scissors and other small pieces, the demand for fine iron is really not much, at least in the eyes of Renault, it is not worth mentioning.

When refined iron is used in construction, the people of Dachu will understand that with this output, it is not a fart, and if it is a hundred times more, Renault will feel that it is less.

This is not counting the fact that he wants to build a ship in the future, as long as the technology can keep up, no matter how bad the iron ship is, it is stronger than a wooden ship, and there is no need to fight, as long as the tonnage is enough, it will be won if it hits it directly.

The Austrians come from the sea, and their wealth also comes from the sea, and Renaud chose the location of Shengong City here to prepare for the future, and it is impossible for him to give up the sea.

Take out an up-to-date plan from the box and hand it to Zhang Tan, this plan is thick enough, a finger thick.

This is written on paper, not the bamboo slips used by the people, Mr. is also used to writing very small words, at least hundreds of words on a page, so thick, it has to be tens of thousands of words.

"Take a good look, this is the preliminary plan of Shengong City, you can follow the above plan, you can come to me at any time if you have any questions. Renault said.

So thick, or is it just a preliminary plan?

What a big game of chess is this going to play, Zhang Tan took the plan, and got out of the RV in a daze, Mr.'s time is very precious, and it is impossible to leave it to him.

When he came, he saw Jing Lan, Lan Yunxi, and Feng Moyu waiting in line for Mr. to meet him, Mr. saw him first, what a big face, no matter how crazy Mr. was, Zhang Tan decided to accompany Mr. to go crazy.

As he walked, he had just finished reading the index, and Zhang Tan felt that his heart was a little unbearable, so he hurriedly closed the plan and walked quickly towards the craftsman camp.

No, take it slowly, sir's idea is too crazy.

Shengong City, the city of fine iron!

Sir plans to build a city out of fine iron!

That's right, that's what Renault intended, the first thing the city had to complete was the ground, a ten-centimeter-thick all-iron floor, with all the ground covered with ten-centimeter-thick fine iron plates, except for the underground water pipes and escape passages set aside in advance.

The reason is simple, there is a huge world underground, there are a large number of creatures there, and without this layer of fine iron floors, you can't sleep at night. Like the triangular beast, there are too many creatures that are good at digging holes, and there are so many underground worlds that even the most brainless purple-skinned pigs can run out of a hole in the ground.

Then there is the surrounding city wall, which is also made of fine iron, and only needs a double layer of five centimeters thick fine iron pouring plates at the beginning, and when the number of fine iron increases, more fine iron will be filled inside.

Such a city made entirely of fine iron could not have been built anywhere else except here, and there were not so many ores.

As for the rust prevention problem, Renault thinks it's not a problem at all, normal cities also need to be maintained, and there are no less than ten kinds of such materials in the forbidden land of death.

Renault, we must build this iron city into a base camp against the Austrians!

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