"There are four major technical systems for electric arc furnaces - ultra-high power power supply technology, enhanced oxygen technology, foam slag technology, scrap steel preheating technology, etc. High efficiency, high quality, low energy consumption and low emissions are the keys to the development of electric arc furnace steelmaking technology. ”

Xiao Jun knows that ultra-high power electric arc furnaces have the characteristics of high unit power level and high maximum power utilization and time utilization of electric arc furnace transformers. Ultra-high power EAFs can greatly improve the productivity of the steelmaking process, reduce smelting costs and shorten smelting time.

Second, oxygen technology, a large amount of oxygen can be used in the electric arc furnace smelting process to speed up the decarburization speed, and the heat released by the oxidation reaction can also be fully used to achieve the effect of energy saving and consumption reduction. The enhanced oxygen technology mainly includes aerobic burner, oxygen blowing flux and melt pool decarburization, oxygen lance and secondary combustion technology. Among them, oxygen burners, oxygen guns and secondary combustion are the main ways to use oxygen, which can also improve the mixing effect of the melt pool, promote metallurgical reactions, reduce power consumption and increase productivity.

Thirdly, the foam slag technology is to spray toner or silicon carbide powder into the molten pool while blowing oxygen, intensify the carbon-oxygen reaction, and form a large amount of CO gas foam in the slag layer, so that the thickness of the slag layer reaches 2.5~3 times of the arc length, and the arc is completely shielded, thereby reducing arc radiation, improving the thermal efficiency of the electric arc furnace, and prolonging the life of the electric arc furnace. Therefore, foam slag technology is suitable for large-capacity ultra-high power electric arc furnaces, and the use effect is more prominent in DC electric arc furnaces with long arcs.

Fourth......

"In fact, the electric arc furnace can produce more high-quality steel, that is, the electric arc furnace can raise a higher temperature to melt the steel ore, and then use super oxidation technology to make the steel ore get a huge fine full combustion, and the same is true for foam slag technology, so that the carbon oxidation is more sufficient, and more impurities in the steel ore are removed......

"If I want to develop a more advanced electric arc furnace, then first of all, in the power supply and charging of the electric arc furnace, it must be better than others. In this way, the development provides better high temperature numbers. In addition, the adequacy of oxygen must also be improved......"

"In addition to the above, it is also necessary to consider the power consumption, efficiency and cost of the electric arc furnace. ”

The electric arc furnace designed by Xiao Jun is roughly composed of this - 1: the power supply is composed of a transformer, 2: a thyristor, and 3: a DC reactor and other auxiliary equipment. At its core, the thyristor.

This thyristor is designed with 4 cathodes (double graphite top electrode DC technology) and 8 water-cooled bottom anodes, each with a current of 100kA for a total current of 800kA. Compared to a single cathode design, the four-electrode technology provides very high power and a small electrode diameter with less interference to the grid.

"Design another quad-core vacuum degassing system!"

"The transformer is critical and should be designed with a power rating of 600MVA and a voltage of more than 3200V in the second section. ”

"Well, the oxygen burner and the carbon spray gun have to be precisely designed...... Otherwise, it will affect whether the oxygen in the electric arc furnace can fully penetrate every corner......"

In the past few days, Xiao Jun's brain has been spinning at high speed, designing, and calculating the design of each part.

If the research and development is successful, then his electric arc furnace will reach a zone temperature of more than 8000 °C, you must know that most of the world's electric arc furnace area temperature is above 3000 °C ~ 4000 °C. The top is nothing more than 5000°C.

And if his electric arc furnace temperature can reach 8000°C, then it will reach a whole new level for smelting steel ore. At that time, the steel produced will definitely be of higher quality.

Not only that, but its production capacity is also very amazing!

This EAF is designed as a 900-ton DC EAF, which is used to produce high-quality carbon steel, low-alloy steel, alloy steel, ultra-low carbon steel and high-grade deoxidized and calmed steel, with an annual output of 6.5 million tons!

The most advanced electric arc furnace at present is Italy, with a 420-ton DC electric arc furnace and an annual production capacity of 2.6 million tons.

At that time, Xiao Jun's 900-ton level, the high temperature reached more than 8,000 degrees, and the annual output was 650 tons. And the most important thing is that with a high temperature of 8000 degrees and more advanced technologies, the steel produced must be more excellent!

Just when Xiao Jun was researching and designing an electric arc furnace.

The new generation of Apple phones from the US imperialist company has been launched.

This time, the phone is positioned in the low-end range.

That is, a mobile phone of about 2000 soft sister coins.

Since the Apple mobile phone is not bad, plus it is now a low-end machine.

The U.S. imperialists also have a positive policy to protect imported mobile phone tariffs. As a result, Apple's mobile phones are selling well in the United States.

At least it is much stronger than those domestic mobile phones in Huaxia.

Originally, the original high-end mobile phone market of Meidi was occupied by Galaxy mobile phones, and low-end mobile phones were seized by Huawei, Xiaomi, OPPO and many other mobile phones. However, with the increase in tariffs on imported mobile phones by the United States, the prices of these mobile phones have been raised, so sales have declined.

Now with the launch of Apple's low-end mobile phones, the decline is even more severe.

Overall, this time Apple's mobile phone transformation, from high-end to low-end machines, has indeed improved, at least its own mobile phone market in the United States has maintained more than 80%.

Of course, in the international market, there are still many mobile phones such as Galaxy mobile phones and Huawei Xiaomi.

In addition to mobile phones, the automotive industry of US imperialism has also recovered.

For example, General Motors and Tesla Motors.

At present, Tesla's new generation of new energy vehicles has been launched, and they are selling very hot in the United States.

In the international market, it is still the Galaxy BYD new energy vehicles that occupy more than 80% of the new energy vehicle market. However, because Tesla cars are also relatively good, they have won a small part of the market share.

Of course, for the Chinese market, there is no courage to enter at all!

Of course, the United States imperialism vigorously supports the local automotive industry and the mobile phone industry, so that these two industries can improve in their own homeland. But they also come at a huge cost.

Now, the US imperialists have stockpiled trillions of tons of soybeans.

Countless farmers have gone bankrupt and the agricultural industry is in a slump. In addition to this, there are several large pharmaceutical companies that have been implicated.

As a result, the market of the pharmaceutical industry is also very bad.

Anyway, now the two sides are hurting each other.

I don't know how long the US imperialists can last!

Anyway, Xiao Jun is not in a hurry, and he is not afraid.

If the US imperialists continue like this, they will only bring their economy to a standstill.

Because, now that the economy is globalized, you will only make your development more backward if you block your local market.

Also, the larger the population, the higher the consumption will definitely be if the economy is high. You are rejecting the market consumption of Huaxia!