As early as thousands of years ago, human ancestors first came into contact with the metal iron.

However, there is only one stupid method of how to extract high-purity iron from iron ore.

That is the method of boiling water refining.

As we all know, the density of iron is considered to be higher among metals.

Materials with high density will also have a larger mass, and to put it simply, it will be heavier.

Water has buoyancy. In ancient times, when the term density was not yet known, we already knew how to use the principle of water buoyancy to screen some substances.

Materials with higher density than water will sink.

If the density is lower than water, it will float upwards.

Using this principle, at the beginning, human ancestors used floating water to extract iron particles.

Throw the ground iron minerals into the water, skim the floating ones with a colander, and after drying the sinking bottom, it will naturally become iron metal, which is used for forging.

But soon, people discovered that this method was not as useful as imagined.

The forged iron still has many impurities and has a short lifespan, which is a little easier to use than a stone tool.

Forging iron tools is a troublesome, and if it is only a little easier to use than stone tools, why do you have to spend so much effort?

So the human ancestors thought about it.

What's going on?

After thinking about it all, I finally saw through the essence and found the reason.

Because there are always some minerals, they may be denser than water, but they are smaller than iron.

What should I do if I sink into the bottom together?

Wouldn't that become thick iron mixed with various impurities?

So the human ancestors changed another method.

I still use the buoyancy of water, but this time I use boiling water.

When water heats to the boiling point, it will keep rolling, and people know this common sense.

The rolling force can drive some lighter fine particles to roll together.

Using this, substances that are heavier than water density and lighter than iron density can be further eliminated.

This is why there is the first relatively complete method of extracting iron particles in history, boiling water refining method.

Even compared with the current high-tech methods of refining iron metals such as vertical furnace refining, magnetic refining, etc., the ancient and bulky method of refining boiling water has long been eliminated.

However, the birth of this method has made great contributions to the advancement of human civilization.

Tang Zheng now plans to use this method to extract iron with higher purity and then send it to the synthesis platform.

Seeing the boiling water rolling, Tang Zheng poured all the iron ore particles ground from the wooden board into the rolling boiling water.

Visible to the naked eye, the originally clear water instantly turned into earth-gray, with a lot of impurities rolling on it.

Due to insufficient technology at this stage, the colander cannot be made. After Tang Zheng and others rolled the boiling water for a while, they wet the cold water with both hands, and quickly raised the bonfire with both sides of the bucket.

Then slowly pour out the sewage in the bucket, and some impurities floating on it are discharged as they go.

The water is very turbid, a bit like it was scooped out from a stinky ditch.

At the end, there was still some water and precipitate of iron particles left in the bucket, so Tang Zheng stopped in time.

I turned back to the wooden house and took out the linen fabric I exchanged yesterday.

Tear a small piece and lay it flat on the wooden board.

Taking the edge of the bag, I poured all the remaining water and sediment in the bucket onto the cloth.

Water penetrates through the fine pores of the fabric, and some iron crystals with gray-black and dull luster are left and piled up on the cloth.

Tang Zheng stretched out his finger and chased a handful of iron particles and rubbed it on his fingertips.

Good iron does not fade unless it has rust.

The fingertips are still rosy.

It seems that this primitive ecological different world, minerals that have been silent for tens of thousands or even hundreds of thousands of years, are the best raw materials, and have never been mined or polluted, and have very high purity.

The result was taken and published on the forum, and the iron smelting post was completed.

Instantly shut up a group of doubtful voices, and at the same time, they harvested a large wave of 666

The forum level exploded again like a rocket, soaring to level 17.

【Ding! Congratulations on completing ‘metallurgy’!】

[Because you are the world's first 'metallurgical' player, you will get a random prop reward: Forest ruins coordinates (excellent level) *1!]

【Bronze Age Progress: (3/8)!】

Looking at the first reward that followed, Tang Zheng was stunned and was very happy.

It seems that the version update predicted by that prophet is true!

I actually randomly received a coordinate reward for a forest ruin! However, the version has not been updated yet and the ruins have not been implemented yet.

If he remembers correctly, the prophet once said that there are a lot of rich treasures in the ruins.

As long as you obtain the treasure, the difficulty of survival will almost change qualitatively!

Although Tang Zheng is no longer short of the most basic survival resources, there are still many obstacles to developing.

He has been developing civilization frantically in recent days, and his attribute values ​​have stagnated.

I'm afraid I've been surpassed by some people with attribute talents.

No matter how fast civilization develops, it cannot beat others, and in the end it can only be used to make wedding dresses for others.

[Are the ruin coordinates now enabled? After turning on, you can highlight the coordinate points on the map!]

"no."

The ruins have not been installed yet, and after that, they are just ordinary trees growing in a mess.

After calculating with your fingers, the first survival limit cycle is probably coming soon. At this time, players who have no food or water resources may have almost been "eliminated".

The version update should be within the next two days.

Tang Zheng wanted to make the stone man puppet before the version was updated to prevent it from coping with the emergencies.

All the iron particles purified today were thrown into the synthesis platform.

Choose to fuse into iron blocks.

The iron particles that have been refined and fused are deformation.

However, iron elements are of good grade resources and the synthesis time is relatively slow.

Even if Tang Zheng's synthesis efficiency is improved, it now takes about 48 minutes to combine a good-grade material.

Until the night was dark, all the iron particles extracted today were synthesized into iron blocks, a total of six.

[Ding! Congratulations on synthesizing the ‘good grade’ resources, synthesis efficiency-1min!]

[Ding! Congratulations on synthesizing the ‘good grade’ resources, synthesis efficiency-1min!]

...

The 48-minute high-quality resource synthesis time instantly reduced by nearly six minutes.

Now it takes only 42 minutes and 37 seconds to synthesize a good-grade resource.

Compared to the first hour of each resource, it is much faster.

Then, it was the stone man synthesis process that Tang Zheng was thinking about.

Throw 50 parts of stone, 20 parts of clay and 5 parts of iron into the synthesis table.

The 5*5 synthetic table grid was almost instantly covered, forming a square furnace shape.

"Fortunately, the synthetic platform I just upgraded yesterday, otherwise the space of 4*4 size would not be enough at all."

As soon as Tang Zheng finished speaking, a prompt popped up in the system.

【Discovering that you are synthesizing excellent items may take up a long time for the synthesis station. Have you confirmed the synthesis?】

With a cautious attitude, Tang Zheng carefully checked it.

There is nothing to synthesize for the time being.

He pressed the confirmation button on the light curtain.

【The furnace (excellent level) is under production…】

【Initial production cycle: 24h】

【Synthetic Cold Condensation:-17min23s】

【Practical production time: 23h42min37s】
To be continued...