Chapter 66 (2/2)

If there is no problem in the operation of the whole process, there is a problem in the process.

Stone bear alone sitting in the distance, looking at the distance of the earth blast furnace, slowly thinking.

First of all, the raw materials should not be a problem. Hematite, limestone and coke made by ourselves are the things that produce hot metal. The slag produced in the smelting process also proves that these three raw materials should be no problem.

Shi Xiong weighed a piece of slag in his hand, and finally denied the possibility of problems with raw materials.

The blast furnace itself should have no problem, even if it is a local blast furnace, it can be a heating place. If there is a problem with the local blast furnace, it should not be the molten iron that is not qualified, but should be the collapse or gas deflagration and other accidents.

Therefore, the local blast furnace should be no problem.

Then the problem should appear in the process after the formation of hot metal.

Stone Bear looked at the pond, and immediately realized what the problem was.

According to the normal principle, after the molten iron flows into the pond from the hearth, after sufficient stirring, the impurities in the molten iron can have sufficient oxidation reaction with the oxygen in the air, so as to successfully decarbonize.

The decarbonization rate of this method is still very high, otherwise, pig iron fragments will not be added as reducing agent to increase the carbon content.

But now the carbon content is obviously on the high side. It is obvious that the stirring of molten iron in the pond is not uniform enough, and the impurities contained in the molten iron do not have sufficient oxidation reaction with oxygen, which eventually leads to the high carbon content in the molten iron.

Thinking of this, the stone bear stood up, walked quickly to the fangtang, looked at the burn marks left by the molten iron in the fangtang, and finally nodded.

Obviously, the pond is still a little small, which leads to the excessive depth of molten iron in the pond. Even if the molten iron at the bottom of the pond is stirred with a stone stick, it will not be able to contact with the air. As a result, the upper layer is fully oxidized and decarburized, but the molten iron at the bottom is still not completely decarburized.

This is also the reason why although most of these ironware are unqualified, a small part of them are qualified steel.

You know, molten iron is not like ordinary clean water. You can stir it up casually. Molten iron is extremely dense, and it is very difficult to stir it.

One way is to find a way to increase the intensity of mixing, then improve the manual mixing method, add some tools?

Standing on the edge of fangtang, Shi Xiong thought silently. But then he shook his head, although improving the mixing method is also a solution, but this method is not easy to achieve, at least in today's conditions is not very good.

If not, build another square pond and put a furnace of iron water into two square ponds. In this way, the molten iron in the square pond can be half shallow and the molten iron at the bottom can be stirred up by stirring!

This method should be feasible!

Looking at the open space next to fangtang, the more Shi Xiong thought about it, the more he felt that this method should be able to solve the problem.

The reason why human society can continue to develop is that as the main body of human society, people can constantly sum up the experience of failure, and then apply the experience to the next attempt, and finally find the way to success!

PS: bow to thank the ”king of the sea of Victoria” 100 reward.