Don't mess with that dragon

Chapter 139 Improvements
"How about it?"

As the charcoal in the soil blast furnace burned cleanly, the entire blast furnace was mostly empty, but with the wood ash covering it, it was impossible to see the bottom.

At this time, the charcoal had just been burnt clean, and the surroundings of the earth blast furnace were still very hot, so even if the dragon nest orcs were a little impatient, they had to stand aside and wait for the earth blast furnace to cool down.

Fortunately, the cold winter also has the benefits of a cold winter. The earth blast furnace, which was very hot not long ago, quickly dropped the temperature.

After touching the furnace wall of the clay blast furnace, and seeing that it was not hot to the touch, Quick reached in from the vent below and pulled the tiles aside, so a strange hole appeared on the base of the whole clay blast furnace. small hole.

Reaching in from the hole, he took out a piece of the lumpy object under the wood ash, and took a breath to blow off the wood ash attached to it, and the yellow copper on the surface was exposed.

However, looking at this "copper block", Austin was not very happy, but frowned.

"Take out all the copper ore in it."

Following Austin's order, Quick, the fox-faced man, reached into the furnace and took out a few pieces of ore from the bottom.

Failed!
Looking at the half-copper and half-iron ores in front of him that were only about half melted, Austin clearly understood that his first copper smelting had failed.

Taking one of the semi-finished products, Austin pinched his paws hard, and it was immediately broken apart like soil, revealing the stone inside the thin layer of copper.

The copper in the copper ore is only half-melted, and it has not been separated from the impurities in the ore, and finally forms such a semi-finished product.

"The temperature is not high enough."

It should be that the temperature inside the earth blast furnace only melted the metal copper in the ore into a semi-fluid appearance, but did not melt the copper into a liquid, so that it was not completely separated from impurities such as stones in the ore.

"No, could it be that there is too much copper ore?"

Looking at the scrapped copper ore in his hand, Austin was a little puzzled. The appearance of this blast furnace and the way of refining copper ore were basically copied from the method of the bare-handed iron smelter that Austin had seen in his previous life. A talented person can smelt iron with this method, and the melting point of copper is obviously higher than that of iron, but why can't this clay blast furnace smelt copper?

"Or, is the environment in the other world different?"

Many thoughts came to mind.

The heavy snow in the sky was still falling, and the pergola built by the dragon nest orcs to shield the blast furnace from rain and snow was not big, so Austin's body was exposed outside.

The heavy snow fell really hard, and in a short while Austin's back was covered with snow, and he shook his shoulders, and the snow on the top fell rustlingly.

Looking at the snowflakes falling all around, Austin suddenly had an idea.

Snow,
By the way, it's snow!
In that video, the great man made iron in the forest on a hot day, but now Austin is in a cold winter!
Austin's eyes lit up suddenly, and he had already guessed the reason why the first furnace of copper smelting was scrapped.

It's the temperature!
The purpose of establishing vents at the bottom of the earth blast furnace is to allow air to flow in continuously, and a large amount of oxygen is brought in with the air to promote the combustion of charcoal in the blast furnace, thereby greatly increasing the temperature in the earth blast furnace.

However, Austin overlooked one thing, that is, when the air enters the blast furnace, it will also take away the heat generated by the burning charcoal.

Under normal temperature conditions, the heat taken away by the wind is far less than the heat generated by the rapid oxidation and combustion of charcoal, so blasting air into it will cause the temperature in the blast furnace to rise significantly.

However, it is not normal temperature now, but a cold winter in the world of ice and snow. The temperature reaches minus [-] or even [-]. Such icy air is blown into the blast furnace, even if the large amount of oxygen brought by the wind causes the charcoal to burn rapidly to produce a greater explosion. At the same time, the cold wind also took away the same amount of heat, which made the temperature inside the blast furnace lower. As a result, it was naturally impossible to smelt copper from the copper ore.

"This is troublesome"

The situation in front of him made Austin scratch his head, but he did not expect that the cold winter would have such a great impact on copper smelting.

However, since the problem is found, it can be solved.

Before blowing the air, it is best to preheat the air, but this is easy to say, but it is a bit troublesome to do.

Originally, the original blower was connected to the air vent. In order to warm up, Austin had to go back to the Dragon's Nest tribe and got a pottery tube from the goblin's equipment manufacturing workshop. The handicrafts that people are proud of after firing porcelain, but after making it, they find it useless, so they are left there unused, and there are also all kinds of messy "arts" that are piled up in one corner. It's hard for Austin to work so hard to find it out.

Use this pottery pipe to connect the vent and the inlet of the blower to form a passage between the two. At the same time, outside the pottery pipe, Austin ordered the orcs to pile up charcoal and wood fuel to heat the pottery pipe. In this way, when blasting air along the pottery tube before entering the vent of the soil blast furnace, it will naturally be heated to a certain extent by the pottery tube to increase the temperature.

Although as the airflow continues to pour in, this method can't heat the blown airflow to such a high temperature, but at least it will be much stronger than the airflow at minus twenty or thirty degrees.

After some redesigning, it was already dark when the soil blast furnace was refilled with charcoal.

Although some want to see the effect of the modification earlier, the temperature will drop again after dark, coupled with the violent wind outside, it is really not a good time for copper smelting, Austin can still afford to wait this time, so he went The orcs were ordered to eat and rest separately.

There was nothing to say all night, and the copper smelting work continued the next day.

Ignite the fire, heat the pottery pipes, and blast the air one by one. The orcs waited quietly. The heat from the blast furnace made the surrounding air not so cold.

With the hard work of the orcs, after two hours, the charcoal in the blast furnace was almost burned out, leaving only a small part.

Austin and the orcs waited around, and the charcoal in the blast furnace was completely burned to ashes in a short time, and half an hour later, the temperature of the hot blast furnace also dropped.

Then, an orc volunteered to open the base of the blast furnace and took out the contents.

"Success!"

Blowing hard, a bumpy, irregular dark yellow copper block appeared in front of my eyes.

Looking at the piece of copper in the hands of the orc, after all the hard work and finally succeeding, Austin could not help but feel a sense of satisfaction.

However, soon, he thought of a problem.

Now that the copper is smelted, how to make weapons?
(End of this chapter)