| Customization: | Available |
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| Certification: | CE, ISO |
| Place Style: | Vertical |
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Refining process description of VD furnace
1. Dehydrogenation
When the vacuum degree is ≤ 133Pa, the hydrogen content in the molten steel [H] is ≤ 1.5 ppm. Due to the fact that the hydrogen content in the molten steel during vacuum treatment is related to factors such as operating process, steel grade, state of various raw materials added to the furnace, and argon stirring state, in order to ensure that the hydrogen content in the molten steel is ≤ 1.5 ppm and improve the dehydrogenation rate, the working vacuum degree of the vacuum system is determined to be below 67Pa, fully ensuring the requirements of the dehydrogenation process.
2. Denitrification
The relationship between the saturation concentration of hydrogen and nitrogen in molten steel and the partial pressure of hydrogen and nitrogen above the melt.However, the nitrogen content in molten steel is closely related to the content of alloy elements in the steel, making it difficult to remove nitrogen. Therefore, try to reduce the nitrogen content in the steel before VD treatment and extend the VD treatment time.
3. Desulfurization
The content of sulfur in steel is also related to oxygen and often maintains a constant proportion, so the deoxidation process of vacuum treatment is also a desulfurization process. In order to obtain steel grades with extremely low sulfur content, some elements with strong affinity for sulfur were used as desulfurizers for desulfurization.
4. Argon stirring
Argon gas is blown into the ladle through the argon blowing port of the breathable brick at the bottom of the ladle to stir the molten steel, causing it to circulate within the ladle. Its function is to create more favorable conditions for the physical and chemical reactions of the molten steel inside the ladle.In order to ensure the effective and smooth operation of the entire refining argon stirring process, each vacuum tank in this design adopts an independent argon flow rate adjustment system, and the argon flow rate is controlled by a dedicated mass flow control module, thereby achieving precise automatic adjustment of argon gas volume.
| Vacuum tank | Vacuum pump system |
| Vacuum tank cover and its lifting mobile car | Vacuum pipeline system connecting the tank to the vacuum pump |
| Vacuum feeding device | Control and monitoring equipment |
Xi'an Hani Tech Co.,Ltd.
Hani Tech is a Hot Rolling Mill manufacturing company working mainly in the area of bar and wire rod mills, high-speed wire rod mills, high-speed rebar rolling mills, TMT rolling mills, flying shear, cold strip rolling mills, reheating furnaces, induction furnaces, intermediate frequency furnace, electric arc furnace, Ladle refining furnace, blast furnace, continuous casting machine.
And we also provide all the parts for roughing rolling mill, and intermediate rolling mill process, including pinch roll, flying shear, cold shear, crop shear, gripping shear, and wire rod mill laying head, all of these crucial parts work extremely precisely and reliably.
It is a technology-intensive product that combines modern rolling mill techniques with machine electron, hydraulic, pneumatic, and instrument. Only a few countries in the world can offer complex, high precision ,and difficult technology.
We can supply designing, manutacturing, installation, and commissioning for your requirements about rolling mill plant with "turn-key" service. And from the initial conception of the plant, Hani is the one-stop supplier able to design, manufacture, install and commission your hot rolling mill plant from A to Z.
In order to further develop the international market, we have successively set up three overseas offices: Dubai Office of the United Arab Emirates, Yangon Office of Myanmar, and Tehran Office of lran.
- We can provide a foundation layout and arrangement diagram
- Trustworthy after-sales service, we will send engineers to your factory to install and debug the machines
- Competitive price & excellent quality
- Our machines are easy operation and maintenance
- Lower investment
- Steady performance
- Products are customized for different needs
- Production capability can be adjusted according to customers' request
- Low energy consumption
As a professional Electric Arc Furnace, Induction Furnace, VD Furnace and Submerged Arc Furnace manufacturer in China, we can supply designing, manufacturing, installation, and commissioning of the equipment with "turn-key" service. We can also design, manufacture and revamp other non-standard equipment according to the requirements of users.
Please send us more information about your project, we would like to give you our proposal immediately after getting your details.
Sincerely welcome you to come and visit our plant.
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