Chapter 944 I am familiar with this.
In fact, even in Gao Zhendong's previous life, after the process was improved, the energy consumption of electrolytic aluminum accounted for more than 40% of the production costs. It is considered a major energy consumer, and it is even more exaggerated in this year.
Seeing Gao Zhendong nodded while listening, the chief engineer smiled and said, "We all know that Chief Engineer Gao is a master in metallurgy and has great experience in energy conservation and consumption reduction..."
This is not a compliment. Qianyang Steel Plant is in the city. They are promoting the effect of using the Gao blast furnace operating line. It is also an enterprise of the 17th Ministry of Machinery, Qianshan Aluminum Plant is still very clear about it. "So we thought, can we ask General Engineer Gao to communicate with the department, and ask the department to do some work in the energy conservation and consumption reduction of our aluminum factory. Of course, we know that this matter cannot be urgent, just thinking about whether we can start this matter."
Hey, if this was an aluminum factory decades later, I really dare not say anything about this, but the current aluminum factory... Gao Zhendong has something to say.
I am familiar with this!
He doesn't have to search for anything, just what he saw at his elders' home in his memory, which is enough for now. After all, those things are related to this aluminum factory. At that time, I had nothing to do at my elders' homes, so I just watched these things after studying. Gao Zhendong's memory is super good, and he can remember a lot of them casually.
Aluminum is good, just the same thing is enough to illustrate its importance: building airplanes!
Gao Zhendong may not know anything else, but it is all that is important enough.
"Well, indeed, I have seen your current production process just now. There is room for improvement in energy consumption." Gao Zhendong smiled and said, some improvements may not be possible now, but some are still fine.
Hmm? You know this too?
This is something that the comrades in the aluminum factory never expected. Their original idea was to make the ministry pay more attention to this matter and start it up through Gao Zhendong.
Steelmaking and electric aluminum are completely different things. It is normal for Chief Engineer Gao to not understand it. He has never heard of him making any achievements in this regard. "Oh, it would be great if President Gao could give some guidance now! Come on, listen."
The comrades from the Aluminum Factory Technology Department were also in the conference room to receive Chief Engineer Gao. If there was no technical person, it would be inappropriate.
"Not to mention electricity, the anode and cathode you are using now. I just heard the introduction that the anode consumption should be more than 500kg/ton of aluminum, right? And from the perspective of material characteristics, the mechanics, electrical conductivity and thermal conductivity of the cathode are not very good." As soon as Gao Zhendong went deep into the details, the entry point was different from what his comrades thought.
If it comes to electricity, he was originally an electrician and had done ESR processes, so it wouldn't be unusual to understand the difference, but electrolytic anode and cathode are another matter. "Yes, yes, sometimes the anode consumption is much higher than this number. As for the cathode, the groove age is indeed not ideal, and the aspects you mentioned just now are not good." It is not surprising that Gao Zhendong can see these, as these are written on paper.
However, they don’t understand how Chief Engineer Gao saw that the parameters were bad without comparison.
But they didn't expect that Gao Zhendong could not only see it, but also find a way.
"In terms of anode, the quality of our petroleum coke and asphalt coke is indeed relatively average. I suggest you communicate with Northeast Carbon Research Institute. They are using asphalt coke and petroleum coke to make graphite blocks, and have worked with me to improve the graphite production process. I don't know whether their process can be used for you, but at least for the inherently insufficient asphalt coke and petroleum coke, their final graphitized products are still of good quality. You can coordinate this matter through the department."
Gao Zhendong is not sure whether the graphite improved production process he provides to Northeast Carbon Research Institute is useful, but at least it is also one direction. The biggest problem is that a considerable part of the products of Northeast Carbon Research Institute are used in places that cost-effectively and can be used on electrolytic aluminum anodes with extremely high consumption. He is not sure.
But at least if Northeast Carbon Research Institute delegates some technology, it will be effective. Later, the normal consumption of the ordinary electrolytic aluminum process was about 400kg/ton of aluminum, and there was still a lot of room, so it was easier to take effect. "That's great. We have always suffered from the poor quality of the anode charcoal block and the consumption is very high. If we can improve it a little, we can also save costs greatly."
"As for your cathode, you can consider starting from several aspects. First, the materials, you use anthracite blocks, right?"
"Yes, Mr. Gao, you are an expert." The comrades in the technology department of the aluminum factory have a little bit of finding their own feelings. If they can say it clearly, it means that Mr. Gao has really studied this aspect.
"There are many coal in Qianshan, and the abrasion speed of anthracite coal blocks is lower. It is normal for you to choose this thing according to local conditions."
Admiration, he found the reason: "General Engineer Gao, are there any problems with this charcoal block?"
Gao Zhendong nodded and shook his head: "For your current conditions, there is no problem with this charcoal block. Production must be determined based on environmental conditions. It is not a good thing to blindly pursue higher, and actual work is often limited. However, if your conditions are good, I suggest using graphitized cathode charcoal blocks. In terms of mechanical properties, electrical conductivity, and thermal conductivity, this cathode charcoal block is better than anthracite. Although the abrasion speed is slightly higher, the overall performance is better."
Graphite-formed carbon blocks can be said to be a result of special tuning. Their mechanical properties and conductivity of electricity and heat are definitely better than those of anthracite blocks, otherwise Northeast Carbon Research Institute would not exist. After all, graphite is not only used in aerospace.
Gao Zhendong pulls silicon single crystal, and this thing is also used. "Ah, okay, I understand, thank you Mr. Gao." Gao Zhendong did not arbitrarily say that the current anthracite blocks cannot be used. This is very pragmatic in their opinion and fully considers the existing conditions. However, this new direction proposed by Gao Zhendong was very inspiring to them. Charcoal is charcoal, and I didn’t expect there were so many twists and turns.
"As for the groove age, you can consider studying the use of carbon-silicon nitride side wall lining and the bottom anti-seepage lining, which should improve the groove age, but the same thing is the case, according to the conditions, step by step."
Only then did Gao Zhendong finally talk about what they care about the most.
"As for electricity, my first suggestion is to reduce your electrolytic voltage. If you can reduce 1mV, it is calculated to be 1mV."
In contrast to the first feeling of ordinary people, the voltage of electrolytic aluminum is very low. Let's put it this way, in theory, you can touch the electric gate by hand, which is less than 4V. Every time you reduce 1mV, the current efficiency can be improved, and current efficiency is an important factor affecting power consumption.
"Reduce the voltage? Then isn't the current not enough?"
This is a contradiction. When the voltage is low, the current will be smaller.
"Reducing the alumina concentration in the electrolyte can reduce the resistance of the electrolyte, but don't drop it too low. If it is too low, the resistance will rise again, and it will increase the anode effect and reduce the current efficiency. You can test this, and I suggest it is between 3% and 4%. " Gao Zhendong smiled.
Comrades don’t know where Gao Zhendong came from. Maybe they have studied it.
In fact, the relationship between the alumina concentration and resistance in electrolytic aluminum is very interesting. It decreases all the way from 8% to about 4%, but when the concentration is lower than 4%, the resistance will rise in reverse.
The most new ⊥小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小小� "That's it, I understand. Let's try it one by one."
"In addition to low voltage, it is recommended to be low temperature."
"Low temperature? Will low temperature reduce the severity of the electrolytic reaction?"
Gao Zhendong shook his head: "No, the generation of products during electrolysis is theoretically only related to the amount of electron transfer. As for low temperatures to reduce power consumption, the reason is very simple. The higher the reaction temperature you want to maintain, the higher the heat scattered into the air by the electrolytic cell. I think everyone understands this principle very well?"
"Ah? That's so simple?"
"It seems like this is the reason."
"The way is simple, the way is simple." Gao Zhendong added: "I have estimated that every 10 degrees drop, the current efficiency can be increased by 1% to 2%. This is a very considerable number. Of course, it cannot be too low. In theory, as long as the temperature is higher than the melting point of aluminum by 200 degrees Celsius, it can be produced normally. However, we all know that theory must be linked to practice, and combined with temperature control, it requires a little overheating to complete the control process. So my suggestion is that you can try to control the electrolytic temperature between 925 degrees Celsius and 935 degrees Celsius, and strengthen the insulation measures of the electrolytic cell, which can further reduce the power consumption."
Although I don't know how Gao Zhendong came about without electrolyzing aluminum, the comrades no longer care about that. If it is really as General Manager Gao said, then a 3% current efficiency improvement is likely to be achieved, and it does not cost too much.
Don't underestimate this little improvement. The theoretical energy consumption of electrolytic aluminum is 6320 kWh/ton, which is actually far exceeding this number.
"Chief Gao, is there any?"
Gao Zhendong thought for a while and said with a smile: "Let me summarize a sentence for you, 'low temperature, low molecular ratio, low alumina concentration, low effect coefficient, and higher polar distance'. Of course, you should pay attention to the problem of excessive or insufficient for every 'high' here."
"Four lows and one high, if you understand, we will adjust the process in this direction to see how much electricity can be saved."
Gao Zhendong said: "But there is one thing that you must conduct research first, otherwise your low temperature will not be able to be done."
"Mr. Gao, what?"
"Electrolyte, electrolyte system, just like the ESR electroslag remelted slag system. If you don't do this well, you won't do it well."
"Mr. Gao, what?"
"Electrolyte, electrolyte system, just like the ESR electroslag remelted slag system. If you don't do this well, you won't do it well."
(This chapter ends)