Wang Defa hugged his arms and watched the craftsmen of the Great Song Dynasty extract nitrate from the nitrate. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

They set up a pottery urn on the bamboo shelf, drilled a small hole the thickness of chopsticks at the bottom, and then poured the nitrate clay into it to press it firmly, and also named it: press the urn.

The upper part of the urn is poured with water, and when yellow-brown water oozes out of the small holes, this is the "brine" containing nitrate.

When the filtered water is colorless, the brine is poured into a large cauldron, and they call it "boiling water".

Finally, they poured the boiled water into a wooden basin, cooled it and crystallized into nitrate, also called "pot nitrate", and the salt boiled out in advance was poured into a cloth pocket and buried with sand, called "perched salt", which could not be eaten after a few days.

The procedure is simple, but the actual process is much longer.

It takes them at least half a day to press the urn, three to five days to filter the water, and four or five hours to boil the water, and the final result is only five or six catties of nitrate and seven or eight catties of salt.

But fortunately, there is no cost in this nitrate, but it is still not as good as the nitrate field method, because the nitrate is troublesome to find, and the content of ** is not high.

And the two of them worked for more than five days, and the harvest was too little.

Of course, the ** purity they extract is not high, and it will not be temperature controlled.

Their so-called perched salt is that the precipitated salt still contains a small amount of **, and they want to differentiate it......

Wang Defa personally devised a method to extract potassium salts from plant ash by tower graded leaching filtration, using gravity to quickly dissolve the potassium salts in the water flow when moving slowly in the potassium-rich plant ash, and as the water flow advances in the plant ash, new potassium salts are constantly dissolved and the solution concentration gradually increases.

Then collect the initial high-concentration solution for evaporation and concentration, and then discharge the low-concentration solution into the next filter for continued extraction, until the potassium concentration of the discharged solution is low enough, so that the potassium salt in the plant ash can be effectively extracted.

This equipment can also be used for the extraction of nitrate.

This equipment is actually a combination of some iron pots, wooden barrels and bamboo tubes, and the most advanced equipment is the thermometer.

In this way, Wang Defa is confident that he will build a handicraft workshop-style primitive chemical plant, which can produce one ton of potassium carbonate and 500 kilograms of ** per day in the initial stage.

Immediately afterwards, he went to prepare his sulfuric acid plant, and after having sulfuric acid, even if there was only a few tens of kilograms of output a day, he dared to say that he had opened the door to the chemical era...... Of course, this road is still very long, and he needs the cooperation of various industries, especially Song Ziqiang's machining.

Rising to the level of sulfuric acid, he didn't dare to deal with it with wood and bamboo, requiring a certain amount of cast iron equipment, ceramic jars to solve a certain storage, but the processing process can not be without pig iron equipment.

When he went to find Song Ziqiang, Song Ziqiang was busy casting pig iron pots, and he was very busy with work.

His workload today is ten medium-sized, ten with a diameter of one meter and two diameters.

Wang Defa saw that several craftsmen of the Great Song Dynasty were using fine sand, lime, and gravel to make iron pot molds. This iron pot mold varies according to the size of the cast iron pot, and one iron pot mold can be used for up to four or five days.

Therefore, this process must always be done by the craftsmen of the Great Song Dynasty.

Song Ziqiang saw that Wang Defa had come to his foundry, so he stopped polishing the iron pot.

Song Ziqiang said: "Why do you want an iron pot again? Didn't send enough for the first two days? ”

Wang Defa said: "It's enough, I'll take a look, when can you process the low-pressure reactor here......"

Song Ziqiang was stunned and said, "Didn't you say that you would wait for the next batch to start refining sulfuric acid?" I haven't started die-casting yet! ”

"Is die casting hard?"

"Fa Zai, it's not difficult, but those Great Song Dynasty craftsmen will only use human die-casting, so the molded parts are too small, we can't always need hammers and axes......

Wang Defa said: "Wait, I'll build a few more windmills......

Song Ziqiang said with a smile: "Everyone has never used the windmill power, and you have only watched the video......"

"What are you afraid of? It's better than useless......"

At this time, Wang Defa saw a Great Song Dynasty craftsman holding a long-handled tongs pot and spoon to pour water into the mold, and the big shed was suddenly filled with the smell of pig iron.

Now the small cupola oven outside the big shed, blowing the bellows pulled by a donkey in a circle, makes a whirring sound, and is melting the good iron they carry.

Now they are stuck in a paradox that without the prime mover, they can't process the prime mover.

Song Ziqiang wiped his black face and said, "Fa Zai, don't worry, we are still lucky, at least the level of these blacksmiths is not worse than mine, or I will be exhausted if I don't just satisfy your equipment......"

This is the truth, Wang Defa saw that three Great Song Dynasty craftsmen were constantly brushing a mixture of water and plant ash on the iron pot mold, and the purpose of this was to prevent the molten iron and the iron pot mold from sticking together.

The production process of the iron pot seems simple, but in fact, the process inside is still very complicated, such as what is the mixing ratio of water and plant ash, how much molten iron is poured into the mold, and when is the best time to start the mold.

All of this depends on the accumulation of daily work experience of the craftsmen of the Great Song Dynasty.

Song Ziqiang said: "I don't know what the world has become like over there, after driving out this batch of work, let's go back and take a look......

Wang Defa knew that he had begun to encourage others to go back again, and sang with a smile: "If the heart is there, the dream is there!" …… Half of my life has been spent with hard work, and tonight I am in the wind and rain again......"

Song Ziqiang immediately said: "Shut up! Don't fool me...... Go back and live a good life, I feel like I'm going to be stupid if I stay any longer......"

Wang Defa said solemnly: "You let Zhang Guoan and his wife do some of this...... Will it work? ”

“…… Well, not more than April, that's the bottom line......"

The six space-time smugglers had indeed decided that they had to go back in April, otherwise, they would have to worry about the layout of the mountain back village in that world.

The massive deforestation and burning of the land is now over, and with the help of black fire/medicine and whale oil, they have burned nearly thirty square kilometers of flat land in this southern region of Liuqiu!

To the east they burned to the slopes of the mountains, to the north was the Eight Rivers, and to the south was a stream less than thirty meters wide, which meant only the entire channel, and the water was less than five meters wide.

This is a very seasonal stream, judging from the waterline of previous years, if it is really in the rainy season, the water potential is still quite large, and it is even more fierce than the Hongshui Creek in Lin'an County.

They can't deal with the Badao River yet, but they still have to be sure of how to deal with this stream.

None of us had ever done a water conservancy project, but we were sure of building a dam twenty or thirty meters long.

In addition to taking charge of the work in an all-round way, Wu Dapeng also reported that he bravely took on the role of supervisor.

But among the miscellaneous soldiers, there are many who have done this, and he doesn't have to worry about it at all.

The leaders said that as long as Wu Shibo paid his wages in full, he didn't have to take care of these tasks.

Wu Dapeng was happy and said: "Rest assured, there will never be a shortage of money, and the promise after three years will never change." ”

This pleased the miscellaneous soldiers, who themselves found a suitable position upstream of the stream and began to build a flood-type dam.

This is the most commonly used method of water conservancy in the Great Song Dynasty.

During the Great Song Dynasty, the level of water conservancy development was relatively high.

Just mention the same, during the Northern Song Dynasty, when Liu Yi served as the governor of Ganzhou, according to the topography of Ganzhou, he designed the Fushou drainage culvert, connected more than 30 ponds in the city, and designed a hydraulic iron gate to prevent the river from backflowing.

It can even be used until now.

In late May 2010, Jiangnan, South China and other places suffered heavy to heavy rain, and some areas of Ganzhou, Jiangxi Province suffered a flood disaster once in 300 years, while the old town of Ganzhou City, which is at the confluence of the Zhangjiang, Gongjiang and Ganjiang rivers, was safe and sound, and was once again protected from urban waterlogging.

This is due to the urban drainage system represented by Fushougou in the Song Dynasty, while cities such as Guangzhou and Nanchang, not far from Ganzhou, have been flooded.

The reason why Ganzhou is safe and sound in the face of heavy rain is because the world's earliest existing urban underground drainage system, the 12.6-kilometer-long Fushougou still carries the sewage function of nearly 100,000 residents in the old city of Ganzhou.

Some experts are impressed: in the old city of Ganzhou, even if the flow of rain and sewage is increased by three or four times, there will be no waterlogging. They think that the foresight of the ancients is really amazing, which makes people speechless.

Wu Dapeng didn't bother with the dam project, but there was still work.

They also need a lot of lime, which is not only necessary for construction, but also for chemical and sanitation, especially for sanitation, and now it is all pointed to to disinfect the environment.

As for the firing of lime, it is relatively simple, they dig a hole five or six meters deep directly on the hillside, and then let the stonemasons build the stone wall and the stone roof, and directly start burning it with charcoal.

The raw material of lime is the coastal reef and the oyster shells they eat.

When quarrying the coastal reef, Wu Dapeng acted as the blasting commander of the two knives, asked them to drill the holes of the stonemasons, then loaded them with black fire/medicine, then compacted and blocked them with wooden stakes, installed a long fuse, and then ignited the ......

"Boom !!"

As a result, for the first time, there was too much loading, and the gravel flew out for a mile, almost killing people!

It took a lot of effort to clean up the rubble at the site.

All the stonemasons' faces turned white with fright, they had never seen such a stone opened......

The second time, there were fewer of them, and there were too many large ones...... It took a bit of effort to clink into small pieces.

After several times, due to the good defense, there was no injury or death, and finally the stonemasons mastered the dosage of black fire/medicine.

In fact, Wu Dapeng himself did not have the number of them, but only acted as a security officer.

At this point, the shore of the Hachido River often rumbles.

Most of the black fire/medicine they produce is used for this.

Wu Dapeng decided to start trying to smelt cement, no matter how bad the quality of cement is, its water resistance is better than lime.

The six people have also not been engaged in this, let alone the craftsmen of the Great Song Dynasty, so everyone follows the information they brought and the construction of the book is carried out.

In their plan, when the salt pond was built, and when the first phase was completed, they would return to their original world.

Salt is not only edible or traded, it is also an important chemical raw material.

When the half-sized sons returned with the hunting party, they brought back not only a large amount of prey, but also different stones, one of which was argillaceous limestone.

When these half-sized men go out to hunt, they are also asked to pick up a variety of different stones and act as a geological exploration team.

Argillaceous limestone refers to a transitional type of sedimentary rock between claystone and carbonate rock.

It is softer than limestone and harder than claystone, and can be used to smelt "Roman cement".

This thing doesn't need to be filled with ingredients, and the temperature requirements are not high, just smelt directly, which is just right now.

The so-called Portland cement, don't even think about it, just the requirements for high temperatures, they can't meet it, let alone the ratio of various ingredients.

Roman cement is not strong enough, however, it is more resistant to water, especially seawater.