The information submitted by Lin Fan is very complete. If the steel rolling mill is really as stated in the information and the reform is successful, it can really increase the steel production of the steel rolling mill a lot.
But what if it fails?
Reform is not something that can be changed just by talking about it. There are too many things involved.
There is great internal resistance in the steel rolling mill. Such a large steel rolling mill is not his responsibility. Deputy Director Li is a typical bureaucrat. Will his faction agree?
Deputy Factory Director Li has been eyeing his position as factory director for a long time, and there are people behind him.
In such a large steel rolling mill, tens of thousands of workers are not monolithic, and the struggle is fierce.
The fact that Lin Fan came to him as soon as possible when he thought of reform meant that Lin Fan was not Deputy Factory Director Li's person, and that he was accompanied by the workshop director whom he trusted.
In other words, Lin Fan only wanted to improve the steel rolling mill.
He likes such workers very much.
If it succeeds, the steel rolling mill will definitely be able to show its face on it.
There are so many steel mills across the country, but their rolling mill is not ranked at the top. There are many steel mills that are bigger than them.
To be honest, Director Yang has a lot of thoughts about this in his heart.
The temptation inside is too great, and maybe he will take the next step.
Once you become the director of the factory, it is impossible to say that you don’t want to go further.
That’s what I thought in my heart, but I was more worried.
The rewards and risks are equal. As much benefit as it can bring to him, the risks he will bear will be greater.
If he succeeds, then he has this qualification.
He failed, and it was difficult for him to withstand the attack that followed.
The whole situation is unclear now. The big boss has told him to be very careful. There is a turbulent situation outside.
But Factory Director Yang retired from the army after all, and he also has the idea of serving the country wholeheartedly.
Once it really succeeds, the first person to benefit will be their Red Star Steel Rolling Mill, and then it will be promoted nationwide through the steel rolling mill.
Then the country's steel production can also double, which is a great thing for the country.
After weighing the pros and cons in his mind, Director Yang had some concerns, but he still had to ask clearly.
If the experiment is about to start, don't be anxious, you still have to report it to your superiors.
"Master Xiaolin, right?"
Director Yang put down the information and asked softly.
"Yes, director, I am Lin Fan." Lin Fan replied.
Director Yang nodded and said, "Is this side-blown oxygen converter you mentioned really so powerful?"
"Of course, I have studied the side-blown converter of our plant. As long as we modify it according to what I said, the steel output of our plant will increase by at least one level."
Lin Fan replied affirmatively.
Of course it will increase, because this has been tested, and it just has the big plug-in of time travel.
Around 1973, Baosteel was the first to carry out experimental reform of the oxygen side-blown converter, and then promoted it to the whole country.
Director Yang: "Then tell me."
Lin Fan sorted out his words and said: "The side-blown converter supplies air from one side of the furnace. Therefore, the trunnions on one side of the furnace are hollow and connected to the air duct. The air blown by the fan enters the hollow lugs through the air duct.
shaft, then passes through the support ring and enters the bellows, and finally blows into the molten pool through the wind eye."
"The side-blown converter mainly relies on the wind eye to supply air, so the wind eye area is related to the wind speed and the pressure acting on the furnace liquid surface. Generally, the relationship between the wind limit area and the nominal tonnage is 30 to 50 cm2/ton. The wind eye
The tilt angle is 7°~8°.
In order to improve the thermal efficiency of the side-blown converter and reduce splash, three rows of air eyes or two rows of air eyes are used on larger converters.
In order to facilitate operation, the furnace cap of the side-blown converter adopts an offset type. The furnace lining is made of tar dolomite bricks. Due to the harsh working conditions of the eye bricks, tar magnesia bricks, brine magnesia bricks or fired magnesia bricks can be used for construction.
"
"This is how a side-blown converter works."
Director Yang nodded after listening. Lin Fan had indeed done enough homework. He had mentioned all of this at the national converter steelmaking conference.
"Compared with the previous steelmaking methods, the air side-blown converter can indeed produce much more steel, but because air is injected into the furnace, there are some problems."
"First of all, because air is injected, the life of the eye bricks is very low, the thermal efficiency is low, and the nitrogen content in the steel is also high."
"The second is that the raw material consumption of steel is high, because the air is not stable enough during the blowing process, there is a lot of splashing, and the iron oxide in the slag is high, so the blowing loss is high."
"Third, the furnace age is generally not very high. The eye bricks of the air side-blown converter are seriously damaged and cannot be hot repaired. Therefore, the maximum furnace age is only about 200 furnaces."
"Fourth, the heat is not enough, the oxygen content in the air is not enough, and the amount of exhaust gas is large, so the thermal efficiency will be greatly reduced."
"But switching to oxygen can make up for these shortcomings, thereby reducing the consumption of raw materials, increasing the age of the furnace, and increasing steel production."
After listening to this, Director Yang's expression became serious. What Lin Fan mentioned was indeed a problem that would occur during the steelmaking process.
"So you know that?" Director Yang asked.
Lin Fan: "I also felt it during the steel rolling process. Generally, the steel coming out of the furnace cannot be directly made into parts. It needs further forging."
"After consulting a lot of information, I learned about relevant knowledge points, so I came up with this idea."
Factory Director Yang: "Yes, there should be more young people like Master Xiaolin who like to study, the better."
Then his voice changed and he said: "The oxygen side-blown converter does have so many advantages as you said, but how to realize it?"
Lin Fan said calmly: "I also had this idea at the time. Since air injection has so many disadvantages, why not replace it with oxygen?"
"The most critical piece of equipment is the oxygen gun."
"Oxygen gun?"
"That's right, it's an oxygen lance. Because the technology of the oxygen lance is not up to standard, there is no way to change the injected gas from air into pure oxygen, and the equipment cannot provide it."
"After checking the information, I found that the oxygen lance of the air side-blown converter can be replaced by the oxygen lance used in the oxygen bottom-blown converter?"
"The factory director also knows that my country continues to have a large amount of copper, and oxygen copper smelting was successful not long ago, and copper output has also increased a lot, and the key point is the birth of the oxygen top-blown converter."
"The oxygen lance is composed of two concentric casings. The inner tube is made of copper tube, and the outer tube is made of ordinary carbon steel tube. The central pipe of the oxygen lance supplies oxygen, and the special gap between the inner and outer tubes allows oil to escape.
Under working conditions, oil and oxygen are injected into the furnace at the same time. The oil heats up, vaporizes and cracks at the muzzle and absorbs heat. Coupled with the expansion and heat absorption when oxygen is ejected, the temperature of the oxygen lance head is always maintained at a few degrees.
Baidu can supply oxygen normally.
During the furnace service period, the end surface layer of the lance head is gradually burned due to high temperature, and the furnace lining becomes thinner and shortens simultaneously until the furnace is shut down."
Lin Fan's words made Director Yang excited. If he said that, it is really possible for the oxygen side-blown converter to be successfully reformed, so the credit for this would be huge.
He quickly took the information back into his hands and said, "Okay, okay, okay."
After saying three good words in a row, Director Yang continued: "What you said makes perfect sense. I will submit these materials. Once the superiors agree, the test will be carried out immediately. Once the test is successful, you will be the first to win."
When the workshop director saw Director Yang being so excited, he realized that Lin Fan actually had a way to increase steel production.
That being said, he also deserves some credit.
Director Yang praised Lin Fan emphatically, then made a promise, took out a watch ticket and a cash register ticket from the drawer of his desk and handed them to Lin Fan.
This is considered an extra reward for him as the factory director.
