When the boiling molten steel sprayed out through a special channel and flowed into various molds, the scene was cheering.

A large number of molds that have been prepared have been prepared are almost equivalent to 80,000 catties, but almost all of them are filled, and the blast furnace of 5 cubic meters, plus the outside, is only forty or fifty cubic meters, that is, a big round guy with a radius of about three or four meters, but it has such a miraculous effect.

When the temperature dissipates and the effect is detected, it gives them a head start, the quality of the steel is very poor, and even, the yield is only about 50%.

Such a ratio was already very high in the blacksmith workshop in the past, and even traditionally, but for the blacksmith workshop, this is not allowed.

In the Daimyo Blacksmith Workshop, the yield rate has reached more than 99%, and the quality control is quite good.

But all this, in this blast furnace, is not possible, almost 30%, directly is scrap iron, unless it is re-furnace, loaded into the steelmaking furnace for re-refining, can be used, about 20%, pig iron.

The remaining 50% is steel, but the quality of steel also varies greatly, and about 10% of it is superhard steel with a hardness of 5.8 or more.

It sounds good, but these steels are gathered together, some are of high quality, some are of low quality, and the associated ones make the final product have certain problems and cannot be used directly.

In fact, as long as the blacksmith is about the same, when he sees these steels, he already knows that this attempt is definitely a failure, and these steels must be processed and distinguished before they can be used.

In the Daimyo Blacksmith's Workshop, a whole set of rules have been formed, and rework and selection, even if you can get superhard steel, is not suitable, which will waste a lot of labor.

However, those who didn't care too much were the researchers led by Niu Dali.

In the laboratory, some attempts have been made, but it is only some analogy and small-scale attempts, of course it will not be so easy to really scale up to industrial production, they have taken all the links into account, plus experience, and quickly obtained, why is this happening.

The heat is not uniform, and in terms of material ratio, some catalysts cannot play a role.

This is the role of research and experimentation, why before, the yield of refined iron was so low, is because, even the blacksmiths, they did not understand what the mechanism of refined iron looked like.

Now, with Professor Zhao Xin, steel is a special alloy method for iron with a carbon content of less than 2.11%.

Sometimes, there are also some alloys and quenching changes, these simple things, for Niu Dali to open a new window.

Talent, experience in iron smelting, and advanced experience from the 21st century, these combined to form Niu Dali such a freak, he is not only familiar with smelting, more than 20 years, so that his understanding of iron, to a certain extent, coupled with scientific knowledge, he quickly from the experimental materials, the reason.

Sometimes, finding the reason is half the success, these smelting blast furnaces, to a certain extent, have been quite mature, plus catalysts, blowing convection systems, these together, it creates the magic of the blast furnace, there are no major problems, just some small problems.

Next, the furnace was not opened again, and in 2 days, Niu Dali led a large number of personnel to carry out at least 100 various experiments, and once again smelted.

This time, Zhao Xin did not participate, he knew very well that from the blacksmith platform to the blacksmith blast furnace, it seems that it is just an enlargement and a contraction, but the technical difficulty is not small at all, his knowledge from later generations, as well as the card system, can reduce this process, but without a lot of experiments, it will definitely not work.

The second time also failed, but the yield rate increased to 70%, and the quality was stable, even if you don't choose, there will be about 60%, and you can use it directly.

Such efficiency, coupled with the yield rate, in fact, has reached a certain level, even if it is a waste product, it can be put into the blast furnace to continue smelting, and it will not be wasted, but Niu Dali is not satisfied and continues to research.

Niu Dali, who is extremely talented, is extremely talented in iron smelting, and he has integrated the knowledge of later generations, plus every time, Zhao Xin will come over to test it and hand him a relatively complete test report.

Data, I'm afraid it's the most important thing, the law, it's summarized from these data, even in later generations, it's impossible to improve every experimental material, complete testing, but the card system can easily do all this.

With the help of many cheats, similar experiments were carried out at least 150 times, and the first time it may be opened once in two or three days, in which a lot of adjustments were made, and in just 12 days, 6 experiments, the yield rate reached 85%, and the quality was quite consistent.

Later, it was necessary to use subtle and extensive experiments to find out the patterns, and it was much faster, and sometimes, the furnace would be opened more than 10 times a day in a row, with only very minor adjustments.

At the same time, during these times, the second, third, and fourth blast furnaces were also completed in sequence, about the same size, from 5 cubic meters to about 7 cubic meters, getting bigger and bigger, and the smelting was getting better and better.

Finally, through one month, hundreds of attempts, just among these attempts, the waste of materials and coke, as high as 20,000 yuan, not to mention these monthly craftsmen are more than 500 yuan, labor costs and material costs, the total amount of more than 40,000 yuan, but the final result is gratifying.

A complete set of formula has been made, which is suitable for steelmaking blast furnaces within 15 cubic meters, with a yield rate of about 95% and a quality of 5.7, surpassing the quality of large-scale production in blacksmith workshops.

Although Niu Dali is still working hard to improve the yield rate, Zhao Xin has recognized this formula, 15 cubic meters, which is very suitable and just at a considerable level, and the yield rate of 92.5 also ensures the quality.

Zhao Xin clapped the board, a one-time construction of 20 15 cubic blast furnaces, according to a 3-hour smelting process, 24 hours a day, can complete 4 furnaces, 15 cubic meters, basically tapping in about 110 tons, so that the output of 20 a day is 8800 tons.

This is a terrible number, relying on 30,000 or 40,000 people, thousands of blacksmith tables, to ensure an annual output of 1.8 million tons, 20 blast furnaces, it has successfully surpassed, about double.

In terms of manpower, it is far less than the blacksmith platform, a 15 cubic blacksmith blast furnace, will use about 400 people, of which, the vast majority of them are laborers, responsible for loading, responsible for sand molds, and finally clean up the finished product, and really control the heat of iron smelting, only three or four masters, which greatly reduces the difficulty of expansion.

Even so, the 20 blast furnaces are only 8,000 people, a three-quarters less in terms of numbers, but the output has doubled, representing an 8-fold increase in per capita steel production.

Reducing labor intensity and increasing production will naturally reduce costs, but even Niu Dali did not expect that the cost would be reduced so much.

When this cost accounting was sent to Niu Dali, it had been expected a long time ago, but the final figure still made Niu Dali startled, 4 Wen per catty.

In itself, the cost of steel in the Daimyo blacksmith's workshop is already very low, about 15 yuan, but through the blast furnace, the intensive use of energy, coupled with reasonable additives and cooperation, the cost of steel has been greatly reduced, but it has been reduced to a quarter at once, which is also terrible.

Just relying on these, with the orders obtained so far, at least 1 billion catties of iron, a catty reduction of 11 wen, is a profit of tens of millions.

In terms of profitability, Zhao Xin doesn't care, he cares more about the output, what fortresses, what cold weapons, these are nothing at all under the huge demand of civilian use.

A Beijing-Hangzhou Grand Canal, it completely changed the pattern of the Northern Song Dynasty, so that the commercial development of the Northern Song Dynasty is very prosperous, Zhao Xin in the future, is ready to open industrial production in the Dinghai Navy, mass production of things, must be in a convenient environment, sold to all parts of the Northern Song Dynasty, the canal can not be everywhere.

At the same time, Zhao Xin also wanted to increase the military heritage of the Northern Song Dynasty, a Beijing-Hangzhou Grand Canal, so that the north could directly obtain the strong support of the entire Northern Song Dynasty, which was also the fundamental reason why the Liao State could not attack the Northern Song Dynasty, but the weak environment in the northwest put a heavy burden on the Northern Song Dynasty.

Transportation, convenient transportation, not only can flourish commercial exchanges, but also can strengthen the war potential of the Northern Song Dynasty, and the nomadic individual strength is different, the Northern Song Dynasty should rely on manufacturing, when the logistics level is stronger under the premise, can the strong national strength, applied to the war.

Then building roads is a must, of course Zhao Xin could not build a highway in the Northern Song Dynasty, the cement mark is impossible to reach, and the steel is almost there, but the second, or even third-class roads, and even the most ordinary cement roads, can make the Northern Song Dynasty traffic reborn, not to mention the railway, when the steam engine is completed, it is the best choice.

In the middle, the consumption of steel is an astronomical figure, the worst railway, the weight per meter, at least more than 15 kilograms, the consumption of a kilometer of railway, more than 30 tons, ordinary grade cement road, the steel consumption per kilometer is almost sixty or seventy tons, this needs to look at the width and thickness.

Although it doesn't sound like much, if the Northern Song Dynasty built trunk railways and highways, it would be at least 100,000 kilometers, which may require millions of tons.

This 15 cubic meter steelmaking furnace, in the eyes of Niu Dali, there may be many differences, and the yield rate has not reached the extreme, but from the industrial production and cost, it is almost the same, the possible improvement in the future is small, but the investment will rise significantly, and it is not worth continuing.

However, now, Niu Dali has not yet found a new research direction, and it is no problem to continue research, and maybe Niu Dali can give some surprises.