The stacking of the blast furnace is not as simple as increasing the height of the 500-pound iron furnace, in the final analysis, it is the change of the refractory materials and mechanical structure of the iron furnace.

500 catties and 5,000 catties are the same as steelmaking, and the total amount of heat energy gathered in the 500 catties is far less than that of 5,000 catties, so the closer the 5,000 catties iron furnace is to the bottom of the furnace, the higher the furnace temperature, and the stronger the corrosion of the molten iron on the furnace wall.

In addition, the larger the capacity of molten iron, the greater the pressure of the furnace wall, the need to accumulate more experience, and also need scientific and reasonable structural design, which cannot be achieved overnight.

The Gonggong faction assisted in the construction of the iron furnace, but they did not know the composition of refractory bricks and refractory mud in the furnace, so even if they knew the structure, they could not build it.

Traditional refractory mud is mainly made of lime, yellow mud and sand, and clay and clay are added. In terms of fire resistance, it is actually very high, but the corrosion resistance of high-temperature molten iron is poor, and the structural strength is not high.

When there is a lot of molten iron, the strength of the external structure of the iron furnace will increase, and the strength of the internal refractory will be inversely proportional, which will lead to the burning of the iron furnace or even the explosion.

Bailiyan added bauxite, a small amount of cement, conglomerate powder, clay, terracotta and kaolin to the refractory bricks.

Its main function is bauxite and conglomerate, which is made into high-alumina refractory mud for boring furnace. Even in modern times, bauxite is still the main ingredient in refractory coatings, and with this formula, even a 500-ton blast furnace can be started in the future.

The Ligong faction always likes to ask for each other uncontrollably, not to mention that in the past few years, Zuomen does not know how many advanced technologies and ideas he has learned.

As an important means to curb the construction of large iron furnaces by the princes of various countries in the future, the formula of refractory mud is obviously not given. It is not allowed that one day the Ligong faction can't resist the temptation and build a thousand-pound iron furnace for the princes everywhere, but the unlucky one is Yongxing City.

After two days of deadlocking negotiations, Duan Songzhi proposed that he could exchange the new technology researched by the Ligong faction four years ago, and guaranteed that Bailiyan had never seen it.

In fact, Bai Liyan didn't believe that the Ligong faction could come up with any technology that he hadn't seen before, unless he drove the plane.

When the drawings were placed in front of Bailiyan, he was also shocked, it was a kind of hemispherical steam engine, the size was not large, the radius was only about two meters, the drawings were made by using the mechanical drawing method taught by Bailiyan, and the structure was very mature.

I can't help but suspect that after the Gonggong faction fled to Changsun Kingdom, the original steam engine was found on the heavenly ship seized from Changsun Kingdom, and the secret let people understand the structure and copy it, and even do not rule out that in recent years, the same scale stakeout was reduced, and the model was handmade for research.

Judging from the information provided by Duan Songzhi, this hemispherical steam engine burns not coal, but wine, and it should be high-purity alcohol, burning alcohol to heat the water in the boiler, and producing steam to push the piston covered by cowhide, so this kind of steam engine is more like a four-like internal combustion engine.

Due to the limitations of technical concepts, processing technology, engineering and theory, it cannot really be made into an internal combustion engine that only needs fuel, and it is only a modification made on the coal steam engine.

However, the heat of alcohol is not as good as coal, and the energy it can provide is less than that of coal, so that this hemispherical steam engine has a fatal defect, the alcohol will volatilize, and it is easy to explode in the air, so this kind of steam engine has a huge copper cover on the outside, and two ignition nozzles are preset.

When alcohol burns and volatilizes, the flamevent is lit to reduce the alcohol in the air, but the result is a loss of a lot of energy and a lack of power.

It took a lot of effort for the Ligong faction to use Boyuan Jun Jifeng's liquor to barely drive the imitation model, and the Ligong faction had even thought that they could use a steam engine to provide power to drive mechanical transmission.

Obviously, this strange steam engine design was very mature and moved to the ship, but the use of alcohol as a steam-powered fuel, not for the power of the hull, has been bothering Bailiyan for a long time, until two years later, when Yuke infiltrated the heavenly ship and was able to figure it out.

There is also a simple copper pump body at the location of the steam engine, which is used to prevent the water from entering the warship and then to drain the water.

Alcohol can ignite quickly because it has a low ignition point and is easy to burn, while coal cannot.

A large amount of coal needs to be ignited half an hour in advance, or even an hour to preheat, for the wooden warship that is about to sink and must save itself, the coal cannot be ignited after being immersed in water, but the alcohol-based steam power only needs to be loaded into an iron airtight container, and it can be started quickly, which is very convenient.

In addition, the heat of coal is high, the temperature is very easy to penetrate and affect the wooden hull, the fire floats on the alcohol when the alcohol is burned, the combustion temperature is low, the temperature heat transfer is slow, only need to load water in the thermal insulation layer, it can effectively prevent the heat from spreading to the hull.

As for why it was not used for hull power, replacing the sails with steam paddle steamers and continuing to use the sails, there are no more than three possibilities.

First, the accumulation of technical theories is far from enough, especially the immaturity of mathematics, physics and metal machining, and the material science is also limited. The use of steam engines in ships requires multiple disciplines such as engineering mechanics, materials science and dynamics, and the hull structure of wooden ships also limits the installation of machines and parts, which is not achieved overnight.

Second, there were already steam-powered ships, and the one that drifted into the North Sea did not happen to be powered by a steam paddle wheel.

The third is the idea and the technical field, and the idea ultimately affects the technical field. If we didn't think of the use of the steam engine to power ships, there would be no technology, not even trains, because no one has a surreal idea, and the technology industry is born out of the expansion of ideas.

Bai Liyan himself is a very good typical case, on the theoretical basis, he does not have any advantage, at best, mathematics and medicine are stronger, and he has mastered basic physics and chemistry knowledge, but this is not the most important, the most important thing is the concept, he has a more advanced concept and a broad vision of cognition.

For example, black gunpowder and nitrocellulose appeared for hundreds of years, and grenades have been ignited from external sources to complete the detonation process.

It was not until the mid-to-late nineteenth century of World War I that the impact detonator appeared, but the current lead-drawn fire pipe wooden-handled grenade appeared before the First World War, much later than the detonator grenade, and the grenade was truly put into practical use.

Its structure seems extremely simple today, and even everyone can do it, but it took more than 400 years to solve this problem, and in the final analysis, it is the conceptual and technical bottlenecks that limit the technical field.

Finally, there is no substitute for the predictability of technological trends.

Technological progress alternates between theory and experimental argumentation, and if the future cognition is predictable, it means that the periodicity of theory and research can be greatly shortened.

Baili Yan is like a hunter walking in the forest, holding a fully open map, while the opponent is holding a torch and walking in the fog to keep groping forward.

When we have a clear understanding of the existing development trends and technological shortcuts, it is undoubtedly feasible to avoid the technological development cycle through shortcuts.

However, the development of science and technology trees and technical reserves is uneven, but if cognition is predictable, mathematics can be accumulated through the foundation of the early stage, so that deductive reasoning can derive more advanced content later, and physics and chemistry can also be widely disseminated, as Bailiyan did.

However, the industrial and human base cannot, and all the predicted contents do not require the accumulation of manpower and basic industry, so it is not terrible to have hot weapons, nor is it terrible to have steam engines, but what is terrible is ideological backwardness and complacency.

For this killer feature that Duan Songzhi came up with, Bai Liyan didn't want to admit that he hadn't seen it, but the mature and ready-made technical model was better than the strength he had commanded a group of craftsmen with no concept to explore for several years.

In exchange, Bailiyan agreed to exchange the formula for the creation of a one-to-one function for production, and added a clause that the finished product and technology could not be sold without the consent of the Xianguo.

As it turned out, the other vassal states did not have the production technology or the conditions for the use of steam engines, and the initial investment in the supporting industrial system was expensive.

However, Bailiyan also played a trick, Duan Songzhi did not continue to ask for the price, so Bailiyan did not mention the increase in money above the 200,000 inches of silver.

200,000 inches of silver is not 200,000 pieces of gold and silver, let alone 200,000 pieces of copper coins, 200,000 inches of silver is not a small amount at the moment, Duan Songzhi knows that Xianguo has made a windfall, but he doesn't know the depth of Xianguo's bottom, and opening his mouth 200,000 is already a lion's big mouth, and he doesn't dare to ask for more.

With the current production equipment and technology, it is not easy to create a one-to-one prototype, only with the original manual fitter, a file and a chisel to take it slowly, a single body of five or six diameter more than a foot, a depth of three inches of round holes, no boring machine, pure manual fitter file chisel, by no means overnight.

The advance of technology will inevitably lead to an increase in the difficulty of production and a sharp increase in funds, and this money should be paid by the workers themselves.

Duan Songzhi only thought that he had created a model with a reduced lofting and could draw a scoop according to the gourd, but in fact, it was too easy to think about things.

The final agreement was presented to King Xian, and when he learned that he had to post it upside down, King Xian was definitely not happy, but if he was not happy, King Jin was about to arrive, and he continued to drag it, and then it was not a matter of 200,000 inches of silver, but the entire Yongxing City was connected to the pot, and the loss was not only 200,000 inches of silver, but also the direct loss of manpower, material resources and investment was more than two or three million.

So I had to bite the bullet, and the treasury took out 30,000 inches of silver in the name of Yongxing City's money, Xianwang's inner mansion paid 50,000, Qianfang paid 50,000, Yongxing Houfu paid 40,000, Yongxing City's accounts hacked 30,000, and collected 200,000 cash, and immediately paid 100,000 yuan in advance, which shows the sincerity of Xianguo.

However, what one of the people who moved Duan Song did not count, now the left door agrees, and the right door also agrees, and in the end, if you want to convince the other elders, you must have absolute persuasiveness.

The cash money and technical cooperation commitments paid by Xianguo are undoubtedly the most convincing force for Duan Songzhi to establish his position as the acting head and flaunt his achievements.

In the middle of February, the king of Jin and the king of Song slowly arrived at the southeast border of Jin and Xian, most of them were uncomfortable with the bumps of the boat, and the king of Jin repaired for half a month after going ashore on the border of Jin and Xian, until the beginning of March, he abandoned the boat and went ashore by land, and entered Jiangdong County by land, went to Yin Yangcheng, and met with Yin Yangjun Fang Bo in Yin Yangcheng.

At the same time, 300,000 Jin troops stationed in Beihai County drew 200,000 people to the south, stationed in 60 miles north of Chenling, although it was not as dangerous as the soldiers in 637 Shengyuan, King Xian was still frightened, urging Zhao Xun to transfer 50,000 elites from the front line to quickly return to defend Chenling, and Bailiyan secretly allocated 5,000 grenades for city defense.