The second process is to send the clinker to the blast furnace for melting.

In this process, there is a very important point, called slag formation.

In the past, the technology was backward, in order to obtain pure iron, people only need to take the iron to beat it repeatedly, and make it into steel, but now the technology is advanced, it certainly does not need to be so complicated, add some co-solvents to the molten iron, dolomite, limestone, etc., under the reaction of high temperature, those harmful chemicals, and complicated metal components will be sintered into slag, stirred repeatedly in the molten iron, and the slag will float on the surface of the molten iron.

Scoop out the slag with a spoon to get pure molten iron.

After cooling, iron lumps are formed.

But is it pure iron at this time?

No, there is no 100% pure substance in the world, 100% is just an illusionary concept, the highest purity of gold can reach %, and the purity of iron is only % at most%, and 0.02% is the most tenacious and universal substance in the world, carbon.

So, there is a very important concept, you can say pure gold, but there is absolutely no such thing as pure iron, all steel, all steel, are called one kind, iron-carbon alloy.

So what is the purest iron called?

Theoretically, 0.02% iron could only exist in a laboratory.

Ordinary iron can be controlled to a minimum carbon content of 0.2%, which is the purest iron in smelting, called wrought iron.

However, this purest iron is of little use, because its carbon content is too low, and the amount of carbon determines the hardness of iron, and the hardness is too low, just like gold and silver, soft and cotton, and you can bite a tooth mark with your teeth, which can be drawn into wire, like the commonly used iron wire, which is made of wrought iron, but it is too soft to be made into a sword.

So how do you strengthen the hardness of iron?

Add carbon.

By controlling the amount of carbon, the quality, strength, hardness, toughness of the metal can be changed, but not too much and not less.

The optimal carbon content is 0.25%-1.7%, which is the most standard, which is "steel" in the traditional sense.

In this range, 0.2%, to 0.25%, called low carbon steel, it has low carbon content, so it is also called soft steel, like rebar used on the construction site, steel bar, is the standard low carbon steel, can be easily bent, and has good hardness, there is also an aspect of the application is in castings, easy to forge, the requirements for forging dies are not high, after all kinds of blanks are processed, and then carburizing, you can become harder.

There are also plates for automobiles, like the front hood of a car, which are used for die-casting, and many of them are mild steel.

Then the second range, 0.25% to 0.6% carbon content, is called medium carbon steel.

Medium carbon steel is not soft or hard, has a certain toughness, and is widely used in buildings, such as I-beam, channel steel, etc., all kinds of plates, profiles, are medium carbon steel.

Simply put, the higher the carbon content, the harder the steel.

Otherwise, it is soft.

0.6% to 1.7%, it is called high-carbon steel, like what seamless steel pipes, steel plates, anyway, almost all of them are high-carbon steel, and there are some tool steels, drills, tapping, reamers, etc., all of which are high-carbon steel, making full use of his sturdiness.

In addition to carbon, nickel, chromium, tungsten, etc., can also be added to become nickel alloy steel, chromium alloy steel, vanadium titanium alloy steel, used in different places.

It has also derived a variety of models, such as what, 314 stainless steel, 316 stainless steel, these are the content of various elements is more or less different, to prescribe.

And higher than 1.7%, it can not be called steel, it is called iron, from 2% to 4%, it is pig iron, pig iron has the highest hardness, but the toughness is very poor, brittle, due to the low cost, it is widely used in basic industries.

Pig iron is obtained by refining iron ore and slagging.

Ore, sintering, refining, molten iron, pig iron, high carbon steel, medium carbon steel, mild steel, wrought iron.

That's the production process.

After obtaining different degrees of iron and steel billets, they are used to make plates, profiles, and pipes, and then they need to enter the next link, rolling and casting.

Use hot rolling method and cold rolling method to press the embryo into plates, steel plates, steel pipes, or use molds to cast forming materials, pipes, I-beams, channel steels, rebars, steel pipes, etc.

And then in the steel industry, there is a long process and a short process.

The long-process means that from mining, to sintering, iron-making, steel-making, to die-casting into plates, profiles, etc., one-stop iron and steel enterprises, such as China's Baosteel, Wuhan Iron and Steel, Anshan Iron and Steel, Shougang, etc., are all long-process enterprises.

It includes a wide range of coking plants, sintering plants, steel mills, rolling mills and other enterprises, and its subsidiaries form a corporate group of its own.

The short process is a scrap refining enterprise.

Hamma Steel is also such a long-term process enterprise and is one of the three major steel groups in Kazakhstan.

The group mainly produces crude steel and pellets, that is, clinker and steel billets, which can only be said to be average in terms of technology.

The technology of the fifties and sixties of Sulian.

There is still a big gap between China's four major steel mills.

In terms of steel rolling, it can only produce thin plates and coils, with a little structural steel and die steel.

In the whole world, it belongs to the downstream of the industry and has a particularly large supply enterprise.

Berezovsky is the chief engineer of the No. 4 Rolling Mill of Hamma Steel, and the rolling mill is a finished product, so what a high position can he be the chief engineer? In terms of his status, I am afraid that his status is higher than that of their factory director and secretary.

It was also the chief development adviser of the Hama Steel delegation this time.

If he had approved CA141, he would have undoubtedly succeeded more than half this time.

It is also Fan Yang and others, the most important bribery targets this time.

At about 8 o'clock the next morning, Battle called Fan Yang.

This time it was also a coincidence that Battelle and Berezovsky were old friends, and when the Hammasteel delegation came over a few days ago, Berezovsky came to meet Battelle alone and sent information about his group.

The original intention was to ask Byttle to help find some sales, China's infrastructure construction in the 90s set off a frenzy, and Hama Steel produced a large number of rebar, medium and heavy plates, with a thick pile of materials originally wanted to expand export channels.

But unexpectedly, it was crooked.

Battle received 10,000 yuan, which is also a huge amount of money for him, he has always been very uneasy in his heart, and he does not dare to use it, he has always kept it close to him, and every time he is alone, he can't help but take it out and take a look.

Money has the power to corrupt.

He also began to waver.

As soon as Fan Yang brought up this matter, he agreed.

He called and asked, "How do you need me to help you?" Can I help you ask him out alone?"

"That's the best, but it's better, you ask him to a café, don't tell him beforehand, we pretend to meet, and then you can help introduce him, and I'll talk about the rest." ”

"Okay, then I'll tell you about it. ”

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