Chapter 389 [Iron pan and fried steel]
As a result, when the furnace was first opened, the two small blast furnaces were burnt down.
After saving several bellows, Fang Chang stood in front of the ruins, carefully inspected and summarized.
Then he combined some ideas in the construction process to get a lot of details that need improvement.
Such as the support structure needs to be changed, the shape needs to be adjusted, and even the stacking method of fuel, ore and auxiliary materials needs to be adjusted, the furnace bottom heat insulation needs to be improved, the outer reinforcement hoop needs to be added, the flue preheating needs to be lengthened, and the air inlet angle needs to be corrected...
In short, after modification and modification, Fang Chang succeeded in refining the first batch of pig iron when it was time to reel the silk.
By this time, he had built eight furnaces in succession.
A variety of situations were encountered in the middle, such as blockage of molten iron, nodules and hanging materials in the furnace, no iron after **** removal, cracking and erosion of the furnace body, and explosion of molten iron when it encountered water. There were even two of them, if Fang Chang was a mortal, he had already lost his soul.
Fortunately, all the materials are collected from Yunzhong Mountain, and they are all made by Fang Chang himself. It doesn’t hurt to dismantle and build, and it doesn’t cost money and food. There is no sense of cost.
Red-hot molten iron flows out of the opened outlet and flows along the preset groove.
Then, the molten iron flows into the groove, gradually changing from bright red to dull, and finally showing the color of metal.
Fang Chang still didn't stop blowing the wind, he kept moving his hands, pulling two bellows, because this blast furnace needs to maintain the temperature, and it can't be stopped until the contents inside are emptied. The coke and iron ore stocks here, and even the tanks used to solidify iron ingots outside, do not support continuous smelting.
It was already night at this time, the sparks spouting from the mouth of the blast furnace, and the bright red molten iron flowing in the trench on the ground illuminated the surroundings.
After nothing flowed out of the furnace, Fang Chang still maintained ventilation for half an hour.
Then he stopped the bellows and walked over to check his results.
The iron ingot that came out at first was still not completely cooled, but he was not afraid of the high temperature, so he reached out and picked out the iron ingot in the first groove, picked it up and looked at it.
Then he tapped with his fingers, the sound was crisp and short.
"That's right, it's finally done." Fang Chang said with a smile.
However, only pig iron comes out of it. Pig iron is brittle and hard, suitable for making some clumsy things, and only suitable for casting. If you want to make fine objects, you still need to use other methods to make steel, or smelt wrought iron to make things and then carry out surface carburizing treatment.
Although pig iron is not durable as a tool other than a hammer, it can be used to cast pots.
Pig iron pots can only be made by pouring. Because they have no toughness, are brittle, and are easy to break, the only way to maintain strength is to increase the thickness. This kind of pot is also very heavy.
However, it also has its own advantages. Although it is not easy to rust only when the oil is used to boil the pot, due to the material problem, the temperature in the pot will not be too high. It is very suitable for stewing and ordinary stir frying, and it is not easy to stick to the pot. And sticky bottom. .
On the contrary, wrought iron pans are often made by forging because of their good ductility. They can be made very thin, conduct heat quickly, and heat up quickly. It is less prone to rust and is resistant to bumps.
This matter was put first by him.
The progress of silk reeling was stopped, and the iron-smelting and frying of steel were also stopped. Fang Chang even gave up sleeping and eating because of his high interest. Not a necessity.
But before officially starting, he first built a square table with stones more than ten feet away in front of the Unknown Hall, put the tripod he had been using for cooking on there, and made a sculpture.
If a mortal can see the changes before and after, he will feel that the style on Xianqi Cliff has improved a bit in an instant.
He first built a one-person-high furnace, smashed the iron ingots that had been smelted, and put them in layers together with coke, and then raised the fire and blasted the wind. When the pig iron inside is re-melted into molten iron, it will flow into the square molten iron pool through a small platform through the outlet next to the furnace.
Using a bronze spoon to quickly scoop up the molten iron in the pool, pour it into two iron pot molds of different sizes that he made in advance, cover the top, and Fang Chang put it aside for cooling.
Casting an iron pot is not difficult. Fang Chang cast a lot of bronze wares before, but now it is just a little upgrade based on previous experience. The iron pot in the mold should be formed without any problems. You only need to wait for it to cool completely, then you can open the mold, take out the iron pan and polish it brightly.
Next, he didn't stop.
Because there are not many pig iron ingots in the furnace, he has almost put half of the iron ingots smelted from a whole blast furnace ore into it, so there are not many molten iron in a bright red state in the molten iron pool.
Fang Chang didn't plan to cast anything else. Xianqiya is his own dojo, and he doesn't need any bronze bells and iron drums. He has more interesting uses for the molten iron.
Stir-frying steel is a relatively simple steelmaking method with properly controlled ingredients and high productivity. As long as it is done properly, the quality will not be low.
He has already prepared the relevant tools. Now that the iron pot has been cast, he waited for it to cool down before continuing to make steel.
Compared to melting pig iron for casting, the additional tools required for frying steel are very simple:
A willow trunk.
Originally, willow sticks were often used when frying steel in the mortal world, but Fang Chang was so strong that he simply pulled up a willow tree in the forest, removed its roots, branches and leaves, leaving only the trunk, and removed the bark, becoming a willow tree. A thick and clean willow trunk.
At the back, there is a bellows in one hand, and a willow tree trunk in the other, stirring constantly in the molten iron.
During the stir-frying process, as the contact area between the carbon component and the air becomes larger, combustion will occur to increase the furnace temperature, and the use of willow for stirring can also maintain the carbon content inside at an appropriate level.
Of course, Fang Chang still groped for a while before he found a suitable method by relying on the extraordinary qualities of a practitioner.
In general, frying steel is much more efficient than forging pig iron blocks to obtain "hundred steelmaking".
Its finished products are often wrought iron or low-carbon steel. Fang Chang was very lucky. It was fried in this furnace. After solidification, he looked at it and confirmed that it was steel.
The product is made into a long and thin strip, which is more suitable for smelting and forging, and can be made into various required devices.
However, Fang Chang first used some of the last molten steel to make a hammer.
Well, when the time comes, put a wooden handle on this steel hammer head and use it to hammer these steel bars.
(end of this chapter)