At this moment, Blacksmith Kang, who had walked in, saw Durin pulling the bellows and pointed to the furnace, saying, "The first step in blacksmithing is to make a fire.
The temperature in the furnace is still not enough; what you need to do now is to make the fire inside the furnace burn even hotter, at least raising the temperature to 3000 degrees."
A blacksmith shop doesn't have high-tech equipment like factories; everything is purely manual, relying only on the bellows under the furnace, pulling and pushing to create a blowing effect.
"Do you see the thermometer next to the furnace?"
"Once that red line jumps to the 3000-degree mark, what you need to do next is to maintain a specific frequency to ensure the stable temperature inside the furnace," Blacksmith Kang said, pointing to the large thermometer next to the furnace, where the mercury fluctuated up and down with the furnace's temperature changes.
Although pushing and pulling the bellows was hard and tiring, over time, it could strengthen arm and waist muscles, which would be of great help to Durin's future blacksmithing.
Blazing flames burned fiercely under the furnace.
Wood and coal emitted a high temperature that was unbearable for ordinary people.
His upper clothes were already soaked, so Durin simply took off his shirt, wearing only his pants, drenched in sweat.
Durin pushed and pulled the bellows, maintaining the temperature inside the forging furnace, but he found it much harder than he had imagined; it looked like a bellows, but the actual feeling of using it was completely different.
The principle of an ordinary bellows increasing fire power is to promote air circulation; with more oxygen, it naturally burns more vigorously.
But Blacksmith Kang's bellows seemed different; it blew a kind of flammable gas into the forging furnace that Durin had never heard of, with a maximum combustion temperature that could reach 5364 degrees Celsius; the more gas blown in, the higher the temperature.
However, the initial smelting temperature could not be too high; Blacksmith Kang stated that the temperature must be controlled at around 3000 degrees, which means the flames inside the forging furnace should be orange.
But while it sounded simple, doing it presented a pile of problems; sometimes even one's own body found it difficult to achieve precise control, let alone operating the bellows to ensure the same amount of gas was blown out.
That was one thing, but the most crucial part was that the gas inside the bellows was generated in real-time, meaning that during Durin's pushing and pulling of the bellows, the gas content was also constantly changing; he needed to precisely judge how much force to use next based on the feel transmitted from the bellows in real-time.
The difficulty could be said to be very high, but if you were to say how difficult it truly was, it wasn't necessarily so; it was merely a matter of time, and the solution was two words—practice more, practice makes perfect.
Dazzling firelight shone on Durin's face, and exaggerated heat waves continuously emanated from the forging furnace.
Durin was sweating profusely, but the sweat that just flowed out would immediately be boiled by the high temperature, bubbling and turning into white water vapor that floated into the air.
The flames inside the forging furnace shifted from crimson to orange-red, changing color continuously, and finally slowly stabilized.
Durin's expression was calm, and his arms, pushing and pulling the bellows, maintained a certain frequency to ensure the temperature inside the furnace remained constant.
At first, he used too much force, and the flames inside the furnace quickly turned blue; then, due to adding too much gas at once in a short time, the flames became too strong, and quite a few blue flames splattered out of the furnace, nearly injuring Durin.
Fortunately, he dodged quickly, otherwise, he would have inevitably been scarred.
This incident also taught Durin a profound lesson; afterward, he became cautious, trying to ensure the temperature rose from low to high, practicing carefully for a long time until he found the knack and could slowly and precisely raise the flames to orange-red.
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