Chapter 477 Design

Chapter 477 Design

"The electric arc furnace has a total of four technical systems - 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 key to the development of electric arc furnace steelmaking technology key."

Xiao Jun knows that the ultra-high power electric arc furnace has the characteristics of high unit power level and high maximum power utilization rate and time utilization rate of the electric arc furnace transformer. The production efficiency of the steelmaking process can be greatly improved, the smelting cost can be reduced, and the smelting time can be shortened through the ultra-high power electric arc furnace.

Second, using oxygen technology, using a large amount of oxygen in the electric arc furnace smelting process can speed up the decarburization speed, and can also make full use of the heat released by the oxidation reaction to achieve the effect of saving energy and reducing consumption. The enhanced oxygen technology mainly includes oxygen burner, oxygen blowing flux and molten pool decarburization, oxygen lance and secondary combustion and other technologies. Among them, oxygen burners, oxygen lances and secondary combustion are the main ways of using oxygen, and combined use can also improve the stirring effect of the molten pool, promote metallurgical reactions, reduce power consumption and increase productivity.

Third, the foam slag technology is to spray carbon powder or silicon carbide powder into the molten pool while blowing oxygen to 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 2.53 times the arc length , The arc is completely shielded, thereby reducing arc radiation, improving the thermal efficiency of the electric arc furnace, and extending the life of the electric arc furnace. Therefore, foam slag technology is suitable for large-capacity ultra-high-power electric arc furnaces, and the effect is more prominent in DC electric arc furnaces with longer arcs.

fourth...

"In fact, the electric arc furnace can produce better quality steel, that is, the electric arc furnace can increase the higher temperature to melt the iron ore, and then use the super oxidation technology to fully burn the iron ore in a small size, foam The same is true for slag technology, which makes carbon oxidation more complete and removes more impurities in iron ore..."

"If I want to develop a more advanced electric arc furnace, then first of all, I must be better than others in terms of power supply and charging of the electric arc furnace. In this way, the research and development can provide better high temperature data. Also, sufficient oxygen The transformation must also be improved..."

"In addition to the above, the power consumption, efficiency and cost of the electric arc furnace must also be considered."

The electric arc furnace designed by Xiao Jun is roughly composed like this - 1: The power supply is composed of transformers; 2: Thyristors: 3: DC reactors and other auxiliary equipment. The core lies in the thyristor.

This thyristor design has 4 cathodes (dual graphite top electrode DC technology) and 8 water-cooled bottom anodes with a current of 100kA per anode for a total current of 800kA. Compared to a single cathode design, the four graphite electrode technology provides very high power and smaller electrode diameters with less disturbance to the grid.

"Design another quad-core vacuum degassing system!"

"The transformer is very critical. One should be designed with a rated power of 600MVA and a second-stage voltage of more than 3200V."

"Well, the oxygen burner and carbon spray gun must 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 it is successfully developed, then his electric arc furnace will reach a zone temperature above 8000°C. It must be known that most of the current electric arc furnace zones in the world have a temperature above 3000°C and 4000°C. The top is only 5000°C.

And if the temperature of his electric arc furnace can reach 8000°C, 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!

The design of this electric arc furnace is a 900-ton DC electric arc furnace. The electric furnace is used to produce high-quality carbon steel, low alloy steel, alloy steel, ultra-low carbon steel and advanced deoxidized killed steel, with an annual output of 6.5 million tons!

At present, the most advanced electric arc furnace is Italy, a 420-ton DC electric arc furnace with an annual output of 2.6 million tons.

At that time, Xiao Jun's 900-ton class will have a high temperature of over 8,000 degrees and an annual output of 650 tons. And most importantly, with a high temperature of 8000 degrees and various more advanced technologies, the steel produced must be even better!

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

The new generation of Apple mobile phones from Apple in the United States is on the market.

This time the mobile phone is positioned at the low end.

That is, a mobile phone around 2000 soft sister coins.

Because Apple mobile phones are not bad in the first place, and now they are low-end phones.

The United States also has a protective policy of tariffs on imported mobile phones. As a result, Apple mobile phones sold well in the United States.

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

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

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

Generally speaking, the transformation of Apple's mobile phones this time, from high-end phones to low-end phones, has indeed improved. At least the local mobile phone market in the United States has retained more than 80%.

Of course, in the international market, it is still unable to compete with many mobile phones such as Galaxy mobile phones and Huawei Xiaomi.

In addition to mobile phones, the US auto industry has also recovered.

Like General Motors and Tesla Motors.

At present, Tesla's new generation of new energy vehicles is on the market, and the sales in the United States are very hot.

In the international market, Galaxy BYD new energy vehicles still occupy more than 80% of the new energy vehicle market. However, because Tesla Motors is considered relatively good, it has won a small part of the market share.

Of course, there is no courage to enter the Huaxia market!

Of course, the United States has vigorously supported the local automobile industry and mobile phone industry, allowing these two industries to improve in their own homeland. But they also came at a huge price.

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

Numerous farmers went bankrupt, and the agricultural industry was in a downturn. In addition, there are several large pharmaceutical companies that have been implicated.

Leading to the pharmaceutical industry is also very bad.

Anyway, now the two sides are hurting each other.

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

Anyway, Xiao Jun is not in a hurry, nor is he afraid.

If the U.S. imperialism continues like this, it will only stagnate their economy.

Because the economy is now globalized, if you keep blocking your own local market, it will only make your development fall further behind.

Also, the larger the population, the higher the consumption if the economy is high. You are rejecting Huaxia's market consumption!