Chapter 62

The coal and wood have been put in the big pit, and the top is sealed with mud according to the instructions of the stone bear, leaving only a fire eye about 40 cm in diameter in the middle.

The wood in the pit will be ignited by this pilot eye, and then coking will begin.

The fire soon burst into flames. Because of the chimney effect of the pilot eye, the flames soared to a height of more than two meters. The smoke also came out one by one, and the onlookers were stunned by the scene.

In fact, although the fire is very strong now, the coal in it has not even ignited. When the flame falls completely and the flame in the pilot eye presents a kind of red orange, the coal inside has already started to burn. At this time, it is time to close the pilot eye with mud.

At that time, the burning coal will produce a high temperature of about 1000 degrees, and when the ignition eye is closed, the coal will change from the burning state to a dry distillation state due to the lack of oxygen, which is the whole process of coking.

There is a flue in the brick house next to the big pit, which is used for firing firebricks, leading to the middle of the stone house. The waste heat generated by coking is as high as nine hundred degrees, which leads to the stone house. By the way, the dried firebricks are completely burned.

This process will last a whole day!

In fact, today's first coking, even the stone bear himself is not sure. It's just like the first steel-making. Although Shi Xiong has seen the process and steps of coking, it's the first time for her to go to the sedan chair.

But fortunately, the coking process is relatively smooth in general. After putting out the fire, watering and cooling down, although we still don't know how the coke inside is refined, the refractory bricks in the stone house are well burnt.

Although a large amount of water has been poured on the mud in the pit to cool down, the internal temperature is still very high. For safety reasons, Shi Xiong decided to open the mud seal after a night's drying, and then go down to select coke.

In the evening, after a dinner of stewed beef with white water and salt, the stone bear sleeps with endless thoughts about the delicious food in his previous life.

Not to mention, since the war came to this era, although there is almost nothing here, that is, the six basic principles of transportation, communication, law and order, heating, and entertainment are basically walking, roaring, shaking, and so on. But Shi Xiong still feels that he has lived a very full life.

Even if there is no delicious food, there are still pipes. Even without a wife, I still have hands

Every day is full of arrangements, as if there are endless things to do.

Although this kind of day is a little boring for stone bear, it gives him an unprecedented sense of fullness to think that he is slowly painting in the vast land of North America, which is similar to white paper. Even the missing of parents and relatives in previous lives has become a lot lighter.

In the early morning of the next day, the stone bear got up and exercised for a long time as usual.

Body is the capital of revolution, which Shi Xiong deeply agrees with.

In my previous dreams, I wanted to train my tendons, but I didn't succeed. In this life, since the sun god has given himself such a wonderful body, we must protect it and say nothing to abuse it.

Even after drinking three bowls of corn dregs pumpkin porridge, Shi Xiong walked out of the house and came to the big pit where he was coking yesterday. Around here, there are hundreds of people, and people are coming in a steady stream.

Everyone wants to know what the guardian has been busy working for so many days, digging holes and burning fires, and what he has ordered.

Breaking through the dry mud, standing at the edge of the pit, I can't feel the heat inside, so the stone bear took the lead to jump out of the pit.

The pit is not deep, and it is not very big. At this time, it is covered with black coke, burning coal and semi coal and semi coke.

After all, this kind of pit is not a special earth kiln for coking, so the coal is not fully burned in it, which results in almost half of the coal is not made into coke.

Stone bear and several clansmen picked and picked in the pit, and soon picked out a lot of refined coke.

With the demonstration of the stone bear, the people also know what coke looks like. In fact, coke and coal are relatively easy to distinguish, so in the middle of the morning, all the coke in the pit is basically selected.

The stone bear estimated that it was nearly 3000 Jin, which was almost the same as his previous estimate.

If it is a special earth kiln, and then smash some coal, then I dare not say that it can reach the ratio of 1.35:1, but 1.5:1 is still no problem. That is to say, if you put in 10000 Jin of coal, you can at least produce 6000 Jin of coke.

However, for the first time coking, we did not use earth kilns. It's very good to be able to use 10000 Jin of coal to produce 3000 Jin of coke. After all, the remaining unburned coal and half burned coal can still be used for coking, or for heating and cooking. The rest can not be wasted.

There seems to be a lot of coke in 3000 kg, which is equivalent to one ton and a half of coke. If the coke ratio of blast furnace is about 0.33:1, that is, 330 kg of coke is needed to smelt a ton of pig iron, the 3000 kg of coke can smelt about five tons of pig iron.

In the future iron smelting industry, it will take about 1.5 to 1.6 tons of iron ore to smelt a ton of pig iron. If calculated, the 3000 Jin coke can smelt about 8 tons of iron ore.

If the average density of hematite is 4, eight tons of iron ore is really not a big thing, and the local blast furnace is not big enough to hold one furnace

Therefore, we have to seize the time to build a special coking kiln to produce more coke, so that we can make a large number of steel.

But this coking made the stone bear and the people who participated in coking gain a lot of experience, which is the most precious thing.

With the foundation of this coking, the Chinese people must have learned a lot. These experiences will play a huge role in the future coking process, which is difficult to measure with food.

The next step is to seize the time to make steel with the refined coke.

After all, the season does not wait for us. If we want winter wheat to be sown in a hurry, we have to build a number of Qu Yuan plows and columbines, which all need a certain amount of steel.

After all, it's easy to catch bison, and it's also easy to say the wooden parts of Quyuan plow and Aquilegia. Only the nose ring of cattle, Quyuan plow head and Aquilegia ploughshare need to be made of steel.

More than 3000 Jin of coke can make a lot of steel.

So the stone bear soon organized people to build the earth blast furnace.

This kind of local blast furnace has no technical content. When China was smelting iron and steel in those years, this kind of local blast furnace could be seen everywhere in China. At that time, there were no firebricks for the Chinese people to build earth blast furnaces. They were all built directly with mud mixed with bricks.

Now stone bear still has firebricks in his hand, so even if he hasn't built a local blast furnace, he is sure.

PS: bow to thank the "king of the sea of Victoria" 500 reward.