The orcs are busy mining these days, and she is not idle. While taking care of other affairs in the tribe on weekdays, she also studied the matter of iron smelting for a long time.

Iron ore used for iron smelting is generally iron oxide, including red Fe2O3, metallic magnetite Fe3O4, brown limonite 2O and siderite FeCO3.

The selection of iron ore in ironmaking should not only consider whether the utilization rate of the material is high, but also look at the degree of pollution to the environment in the ironmaking process, whether the raw materials are easy to obtain, and whether the raw materials react violently in the refining process.

What was found directly in the tribe this time should be a magnetite of good quality. The three most commonly used iron ores in the modern ironmaking industry, magnetite are impressively listed. So there is no need to worry about iron ore.

The shaft protection method was used when digging, but fortunately, the iron ore found this time was very stable and there was no danger. But Di Mu still did not hesitate to equip every orc who went to the mine to dig iron ore with professional equipment.

The mining operation this time is relatively secret, after all, there are many people in the tribe now, so the workers in charge of mining are all directly finalized by Granny Hua and them sitting together.

There is no need to worry that these orcs will be unwilling, and in return, the tribe will reward them with rich rewards.

The orcs involved in the ironmaking operation showed great cooperation.

Di Mu gave them time to think about it, she knew that mining was still dangerous. But these orcs all refused the time given by Di Mu to think about it, and agreed on the spot, and swore to the beast god that they would keep it secret before the tribe made it public.

Originally, when the tribe was still living a hard life, the tribe did everything together, but it didn't make sense, but now that life is good, I forget my responsibility as a member of the tribe.

In the eyes of the orcs, doing things for the tribe is a matter of course, and the tribe should come first.

After the raw materials were solved, Di Mu began to study again

She read a lot of ancient books, and the early people used the method of "forging".

This method is not only inefficient, but also the iron smelted is relatively brittle, and the use effect is not ideal. In the end, it was "wrought iron", but at this time, "wrought iron" was not the "wrought iron" in our modern population, it was essentially pig iron with improved performance.

Cao Cao used this method to build five hundred iron swords, which took three years.

However, early humans could not find a better way for the time being, so they could only continue to use this method of forging.

Later, people gradually studied the "block refining method", and the obtained "block refining penetration steel" was wrought iron.

The rationale is to change the carbon content of iron to improve the properties of iron products.

The iron obtained by repeatedly forging and extruding impurities in the iron using the block refining method is called "block iron forging", and by using the block refining method to increase the carbon content in the iron and make it hard, "block iron penetrating steel" can be obtained.

Later, the ironmaking method had a completely new change.

Cast iron smelting technology appeared.

Roughly speaking, iron ore is turned into liquid molten iron at extremely high temperatures, and the molten iron is collected and cooled to become "cast iron".

Di Mu felt that relatively speaking, of course, the cast iron technology was more in line with the current needs of the tribe.

She didn't pay much attention to modern equipment when building machines, after all, there are still many technologies that they would never be able to achieve in their current era.

No matter how omnipotent Di Mu is, it doesn't mean that she can single-handedly achieve the results that human civilization has only had for thousands of years in an unfamiliar field.