The two potters did exactly what Zhao Xin ordered, to be honest, ceramics are similar to this smelting, ceramics are made of clay, clay and lime are used here, anyway, they are all similar to clay, the temperature of calcination is about the same, ceramics are a little higher, this is a little lower, this is still relatively easy for these two guys who are dissatisfied with half a bottle. Pen % fun % Pavilion www.biquge.info

Zhao Xin is actually quite worry-free, to be honest, what he wants is temperature control, without a high-temperature thermometer, accurate temperature control, what is needed is experience.

The reason why I am looking for a master is because of this, fired ceramics and cement have certain similarities, and the temperature is about the same, not as simple as burning bricks.

If there are really a few stubborn and well-skilled masters, when the time comes to discuss it with Zhao Xin, Zhao Xin will also have a headache, he is not a professional, but through the formula of ancient chemistry, he barely suppressed the brick-making master, or promised that once he failed, he would follow their experience.

Cement is different from bricks, with higher technical content, even if it is red bricks, as early as thousands of years BC in the ancient Babylonian era, it can be manufactured, throughout the history of Europe, but cement is different, especially Portland cement with modern significance, from the emergence of modern cement, it took seventy or eighty years of transformation and research, which led to Portland cement, which is very difficult.

In itself, according to the formula, it may not be able to succeed, let alone obstruct, at the time of firing, there are another 4 cement kilns, and a large amount of material powder began to be made, in order to continue the experiment, as long as it can be completed within a week, that is, before the recruitment ceremony of the team training, the cement production is completed, it is considered a success.

The processed powder, which is mixed in a certain proportion, is fed into a cement kiln, which has the characteristics of a huge ceramic kiln, which is enclosed and heated with charcoal and coal.

These coals, are bought from the vicinity, the whole north of China, there are many coal mines, the history of China's use of coal is very long, in the Neolithic Age, there are ornaments made of coal, in the Han Dynasty iron smelting ruins, there are also coal cake steelmaking discovery, to the Song Dynasty, in fact, coal has become a general fuel, can not be said to be used by every family, but in the place close to the coal field, the use rate is quite high.

Ceramics are also large users of coal, and compared with charcoal, which is difficult to make and expensive, the coal that can be used can be used when it is directly mined, which is much cheaper.

In the era of no chemical foundation, the chemistry of the high school starting point is already the limit of ancient chemistry, only high temperature, highlight, combustion, violent reaction, and the generation of precipitation or color change, so as to prove the emergence of chemical reactions.

For example, molecular chemistry and ionic chemistry only convert and react in liquids, and this kind of chemistry, without molecular and ion microscopes, has no way to control its process, not to mention, most of the ionic reactions are reversible, and the knowledge contained in this is not fully mastered even in later generations, let alone this era.

Putting aside the idea that suddenly appeared, the temperature began to rise, the cement kiln began to be successfully closed, and the potters were also experienced, and they helped Zhao Xin a lot here, at least temperature management and closure, which Zhao Xin could not do.

Without them, if you want to try, you can only calcinate it on a large fire, fill it with different fuels, and then get the finished product in dozens, if not hundreds, of experiments.

With the help of professionals, from the cement kiln to the encapsulation and combustion method, Zhao Xin only needs to tell them that the temperature is a little lower than that of ordinary ceramics, and these vague ones may have a temperature difference of 50-100 degrees, which is relatively easy for professional potters.

In fact, these two potters also started as apprentices since childhood, and the apprentices did the most and practiced the most, which was heat control and rough embryo manufacturing.

The latter is manual work, after the rough embryo of ceramics is manufactured, it will be controlled by the real master craftsman, and the glaze treatment is carried out, but the former is the most time-consuming, but also the most difficult, staying near the kiln, maintaining a certain temperature, in order to ensure the successful production of porcelain or pottery, which takes a relatively long time, and the masters only need to come and monitor it occasionally.

The temperature is enough, the whole calcination process takes a little time, Zhao Xin asked the two potters to continue to monitor the temperature, and Xue Yu and Sun Ji also polished enough dry materials for 10 firings in the time just now.

In this era, there are no modern machinery such as steel mills, but in the hands of non-human beings like Sun Ji and Xue Yu, the efficiency is not ordinarily high.

However, the two of them were discouraged, Zhao Xin specially prepared crystal goggles for them to prevent lime from entering the eyes, embodied crystal chips, and then used leather with better flexibility to fix it in the position of the eyes, and the rest was average, patted to remove most of the dust, and then took a bath.

Whether it is cement or lime, it is dust, dust is extremely harmful, Zhao Xin has no way to solve it for the time being, at most in the future, get activated carbon, and make masks, without perfecting the premise of mastering modern knowledge, what environmental protection, that is a joke.

On the recipe, the time is clearly marked, it is 4 hours, that is, 2 hours, under the blazing fire, only two potters where to monitor, this matter, they are also more familiar, the ceramic kiln needs more time, sometimes, almost 4 times more than cement, plus the heating and cooling time, one or two days are normal.

After a morning, Zhao Xin calculated that the time was almost up, and Sun Ji and others rushed to the cement kiln, sure enough, as early as an hour ago, they had turned off the flame, and now it is slowly cooling, the temperature required by the cement, compared with soda ash, etc., is much lower, and the specially made kiln is also helpful for the reduction of temperature, which is much more convenient than when making soda ash before, about a while, and when the temperature is reduced to below 200 degrees, you can use special tools to take out the material.

This is also the difference between cement and ceramics, what is cement, it is a cheap adhesive, not as expensive as ceramics, take a big shovel with a handle, you can get the clinker out, put it in a ventilated and cool place, and quickly cool down.

Zhao Xin's current needs are only to light up the cards on the card system, not to make a large number of cement, although there is a perfect formula on ancient chemistry, coupled with Zhao Xin's forward-looking guidance, but the obvious difference between industrialization and handicraft workshops is that the success rate and efficiency.

In ancient China, the production of beautiful ceramics, even some ceramics, even modern can not be copied, the reason is very simple, in ancient times, there is a kind of kiln change and kiln treasure existence, this kiln change, to put it bluntly, quality control is not good, in thousands of failed works, occasionally born a ingenious, magical porcelain, this kind of porcelain, even if it is the maker, in a lifetime, can not be reproduced, later generations can only rely on a simple description, even can not see the premise of the real thing, how can it be remade.

Under the modern process, quality control and mass production, basically offset this kiln change, every time there is a waste product, the number is very small, most of it is caused by negligence, not like in ancient times, under the fuzzy control, local changes, will waste tens of millions of ceramics, but also produce ingenious national treasures, but this proportion is too low.

It's just that with two and a half bottles as a potter, coupled with the unfamiliar cooperation and the less scientific cave, it is too much to think about the stable production of cement with a high proportion.

It is based on reality that Zhao Xin has been on the scale and lighting cards from the very beginning.

A total of 30 kilograms of clinker were taken out, it seemed to be very good, Zhao Xin waited until the temperature cooled down, and asked Sun Ji to help grind it again, with the previous experience, this time the amount was much less, and in a few minutes, it was completed.

After the cement grinding was completed, Zhao Xin's card system flashed red, and Zhao Xin was happy, and the card system had been lit up, and it was a new card cement.

Cement is no longer a simple mixture because of high-temperature forging, plus it is 1850 standard Portland cement, in the card system, it is positioned as second-class, and in the back, there is a degree of completion and content, not too high, 67% content, but most of the impurities are lime.

After calcination, most of the clay is reactive, and the lime paste itself is a fixed addition in the cement, and even in the reinforced concrete, it will be filled with a little lime, such impurities do not affect the grade of cement, but in the synthetic reinforced concrete, as well as the cement mixture, it is necessary to pay attention to some proportions, which will change compared with the tradition.

After grinding and sorting, about 30 catties of cement, leaving about 27 catties, looking at this gray and not slippery, not good at all cement powder, Sun Ji They are also very curious, will this be another kind of food, it seems that after starting from steamed buns and buns, Zhao Xin has been recognized by everyone in cooking, and naturally thought that this thing is a special seasoning that can be added to food.

If Zhao Xin knew what Sun Ji and others thought, I am afraid that he would laugh and say that his stomach hurts, eating cement, this idea is good, but he doesn't know how it tastes, it will definitely be unforgettable.

At this moment, Zhao Xin didn't have a chance to care about their thoughts, cement, Portland cement, even if it was only not very qualified, and the mixing ratio was not high, it was also a modern creation, with this, what castles, fortresses, fixed fortifications, can be quickly manufactured, with the help of the card system and abundant manpower, Miaojiazhuang will change the original different brilliance in a short period of time, and it will become an attacker's nightmare.