But at present, Xinfeng's smelting scale is almost at its limit.

Mainly because Xinfeng has no iron ore and no coal.

I can only buy it from the Iron Officer of Lantian County.

The iron officials in Lantian County have very limited monthly iron production scale.

Now, all the known rich iron ore of the Han family are in Shu County, Nanyang and Qilu.

Therefore, there is almost no future for developing a super-large iron smelting industry in Xinfeng.

However, it is feasible to develop high-end steelmaking technology.

After all, Shaofu has hundreds of thousands of kilograms of used iron tools to be disposed of every year.

These used iron tools are basically weapons or slaves who retired from the Han army, and various tools used by prisoners.

Shaofu generally chooses to return them to the furnace and then make them into new weapons and tools.

If the technical problems of blast furnace steelmaking can be solved, then you can get these discarded iron tools from Shaofu and turn them into crude steel or even steel with superior performance!

And this will be a huge income!

Thinking of this, Zhang Yue made up his mind.

Steel, even crude steel, is a luxury in today's Han Dynasty!

A sword mixed with steel is often priced at tens of thousands.

If a sword made of stainless steel is just a matter of time.

More importantly, this is a huge leap from iron to steel.

If all the abandoned iron tools in Shaofu are made into crude steel, they will be about one or two thousand tons of crude steel, which can completely replace the elite weapons and equipment of the Han army with all-steel weapons.

It can instantly open up an era of technical differences between the Han army and the Hun army.

Zhang Yue knew that later steelmaking techniques were divided into open furnaces and converters, but he did not study industry and only had a slight understanding of this.

But he still knows the basic common sense.

"Mr. Cheng..." Zhang Yue said to Cheng Yuan: "I have an idea. Can you ask the masters of the Shaofu to help you with the experiment?"

"Shi Jung-in, please give me instructions..." Cheng Yuan is certainly not allowed. It doesn't matter if there is an extra stove here, right?

Zhang Yue looked at the five vertical furnaces in front of him, thought for a while, and said, "The appearance of this furnace is still like a vertical furnace..."

"It's the furnace wall. I want to use dolomite and clay to make the furnace wall..."

"Then, I want the craftsmen to try to see if they can put some lime powder into the smelting process as medicine..."

Among the popular science books in later generations, alkaline bottom air blowing steelmaking method is a landmark technology.

Its emergence has solved the problems of desulfurization and dephosphorization of steel.

Of course, today, the technology of the vertical furnace has its own bottleneck, and it may not be able to achieve the level of steelmaking furnaces during the Industrial Revolution.

However, if you only use scrap iron to make steel, adding this improvement may lead to good quality crude steel.

If it really doesn't work, you can get fine iron with fewer impurities!

Anyway, you won’t suffer any loss if you try it!
Chapter completed!