Inline Degassing Equipment Manufacturers for Aluminum Casting
Author : Jack wang | Published On : 14 Sep 2026
AdTech China is a manufacturer of online degassing equipment for aluminum casting, specializing in molten aluminum purification, hydrogen removal, filtration, and related aluminum melt-treatment systems. Founded in 2012, AdTech develops and manufactures online aluminum degassing units, filtration equipment, ceramic foam filters, deep-bed filtration systems, launders, flow-control systems, hot-top casting components, fluxes, and other metallurgical materials for aluminum and aluminum alloy producers.
For aluminum foundries, online degassing is an important step in controlling dissolved hydrogen and improving molten-metal quality before casting. However, choosing the right degassing equipment manufacturer requires more than comparing equipment prices. Buyers should evaluate the degassing principle, rotor and refractory materials, gas control, temperature management, equipment configuration, maintenance requirements, automation, and the manufacturer's experience with aluminum casting.
This guide explains how online aluminum degassing works, what types of equipment are available, what to look for in a manufacturer, and why AdTech China is an aluminum-focused manufacturer of online degassing and filtration equipment.
What Is Online Degassing Equipment for Aluminum Casting?
Online degassing equipment is an industrial system installed in the molten aluminum processing line to remove dissolved hydrogen and assist in removing certain unwanted impurities before casting.
Unlike batch treatment, an online degassing unit is integrated into the molten aluminum flow path, typically between the furnace or holding furnace and downstream filtration or casting equipment.
A typical process can be represented as:
Melting → Refining → Online Degassing → Filtration → Launder / Flow Control → Casting
AdTech describes its online degassing equipment as being installed between the furnace and casting machine to treat molten aluminum containing hydrogen and other residues that can affect quality and mechanical properties.
Online degassing can therefore become an integral part of a continuous aluminum casting and purification system.
Why Is Degassing Important in Aluminum Casting?
Hydrogen behaves differently in molten aluminum than it does in solid aluminum.
Molten aluminum can dissolve significantly more hydrogen than solid aluminum. When the metal solidifies, the reduction in hydrogen solubility can result in hydrogen-related porosity if the melt has not been adequately treated.
Hydrogen-related defects can affect:
- Internal quality
- Mechanical properties
- Pressure tightness
- Surface quality
- Machining performance
- Rolling performance
- Product yield
This is why controlling dissolved hydrogen is an important consideration for aluminum foundries and aluminum alloy producers.
AdTech's technical information explains that excessive dissolved gas can negatively affect final aluminum casting quality and that hydrogen control requires both preventing hydrogen from entering the melt and removing dissolved hydrogen before casting.
How Does Online Aluminum Degassing Work?
Most rotary aluminum degassing systems use the principle of gas flotation.
The basic process is:
Inert Gas → Rotor → Fine Bubbles → Molten Aluminum → Hydrogen Transfer → Bubble Rise → Hydrogen Removal
A controlled flow of inert gas, commonly argon or nitrogen, is introduced into the molten aluminum through a rotating rotor.
The rotor breaks the gas into relatively small bubbles and distributes them through the molten metal.
As the bubbles move through the aluminum:
- Hydrogen dissolved in the molten aluminum transfers into the gas bubbles.
- The hydrogen-containing bubbles rise toward the surface.
- Certain non-metallic inclusions can also attach to or be transported by the bubbles.
- The treated metal remains in the process while the unwanted material is removed from the melt surface.
AdTech describes this gas-flotation mechanism in its online degassing equipment documentation. Its systems can use inert gas or, for applicable processes, an inert-gas/chlorine-gas mixture.
What Gas Is Used for Aluminum Degassing?
The process gas depends on the aluminum alloy, treatment requirements and plant process.
Common gases include:
- Argon (Ar)
- Nitrogen (N₂)
- Argon/chlorine mixtures for specific applications
For standard hydrogen removal, inert gases such as argon or nitrogen can be used.
AdTech's published equipment information specifies high-purity argon or nitrogen as degassing media and also describes a chlorine-system configuration using an argon-chlorine mixture for applications where additional removal of certain alkali metals is required.
The gas should therefore not be selected independently from the alloy and melt-treatment process.
What Is the Role of the Degassing Rotor?
The rotor is one of the most important components of an online aluminum degassing machine.
Its primary functions are to:
- Introduce process gas into molten aluminum
- Break the gas into bubbles
- Distribute bubbles throughout the melt
- Promote contact between gas bubbles and molten aluminum
- Improve hydrogen transfer
- Maintain stable treatment conditions
Rotor design can directly affect degassing performance.
The important factors include:
- Rotor geometry
- Rotor material
- Rotation speed
- Gas flow
- Immersion depth
- Melt depth
- Rotor wear
- Aluminum alloy
- Treatment time
For this reason, an experienced online degassing equipment manufacturer should be able to discuss the rotor as part of the complete system rather than treating it as a simple replacement component.
What Material Is Used for an Aluminum Degassing Rotor?
The rotor operates directly in molten aluminum and is therefore exposed to:
- High temperature
- Molten aluminum
- Chemical attack
- Mechanical rotation
- Thermal shock
- Continuous wear
Material selection is consequently important.
AdTech's online degassing equipment uses silicon nitride (Si₃N₄) ceramic technology for the degassing rotor, heater protection sleeve and thermocouple protection sleeve in its published equipment specifications.
Silicon nitride components are designed to provide suitable performance under demanding molten-aluminum conditions.
When comparing manufacturers, buyers should ask:
What material is used for the rotor?
What is the expected rotor service life?
Is the rotor replaceable?
How is rotor wear monitored?
Are replacement rotors available?
These questions can be more important for long-term operating costs than the initial equipment price.
Main Types of Online Degassing Equipment
Online aluminum degassing systems can be configured in different ways depending on production requirements.
AdTech's product range includes fixed-type and tilting-type degassing equipment.
Fixed-Type Degassing Equipment
A fixed degassing unit is installed in a predetermined position in the molten aluminum line.
It can be suitable for production lines where:
- The process layout is stable
- The equipment remains in one location
- Continuous operation is required
- Integration with existing launders is preferred
The final configuration should be designed around the customer's casting line.
Tilting-Type Degassing Equipment
A tilting configuration can provide additional flexibility for certain production layouts and maintenance requirements.
The appropriate design depends on:
- Available space
- Existing launder arrangement
- Furnace position
- Casting machine position
- Maintenance access
- Production capacity
A professional manufacturer should evaluate these factors before recommending fixed or tilting equipment.
Online Degassing Equipment With Heating
Temperature management is another important aspect of aluminum melt treatment.
Molten aluminum must remain within the required processing-temperature range throughout degassing and filtration.
If the temperature drops excessively, the process can become unstable and may affect downstream casting.
AdTech's degassing equipment is designed with heating functionality and temperature monitoring. Its published equipment information describes an online temperature-measurement device and heating system for maintaining suitable processing conditions.
This means an online degassing unit can perform two important functions:
Melt Treatment + Temperature Management
rather than simply injecting gas into the aluminum.
Why Temperature Control Matters During Degassing
Aluminum casting is sensitive to changes in melt temperature.
During degassing, the manufacturer needs to consider:
- Initial molten-metal temperature
- Heat loss through the equipment
- Gas flow
- Treatment time
- Heater capacity
- Refractory insulation
- Downstream casting temperature
A well-designed degassing system therefore needs more than a rotor and gas supply.
It requires coordination between:
Heating + Gas Flow + Rotor Speed + Melt Flow + Temperature Measurement
This is one reason why choosing an experienced equipment manufacturer is important.
Online Degassing vs Batch Degassing
Aluminum foundries may use different melt-treatment methods.
Online Degassing
The equipment is integrated into the molten aluminum production line.
Advantages may include:
- Continuous treatment
- Integration with casting lines
- Consistent process conditions
- Reduced manual handling
- Better suitability for high-volume production
Batch Degassing
Molten aluminum is treated in a ladle, furnace or separate treatment vessel before being transferred downstream.
This can provide greater flexibility for certain production processes but may require additional material handling.
The choice depends on:
- Production volume
- Casting process
- Plant layout
- Alloy requirements
- Required hydrogen level
- Automation requirements
For continuous aluminum casting, online degassing is often an important technology to evaluate.
Online Degassing Is Not the Same as Filtration
This distinction is important.
Degassing and filtration solve different molten-metal problems.
Degassing
Primarily targets:
- Dissolved hydrogen
- Certain dissolved or reactive impurities depending on process gas
Filtration
Primarily targets:
- Non-metallic inclusions
- Oxide-related particles
- Solid impurities
Therefore, a high-quality aluminum melt-treatment line may use both:
Online Degassing + Ceramic Foam Filtration
rather than choosing one technology instead of the other.
AdTech manufactures both types of equipment and the corresponding filtration materials. Its current product portfolio includes degassing equipment, electric and gas-heated filtration equipment, deep-bed filtration equipment, cartridge filtration equipment, ceramic foam filters and alumina filter media.
Online Degassing and Ceramic Foam Filtration: A Complete Solution
A typical aluminum melt-treatment line can be arranged as:
Furnace
↓
Online Degassing
↓
Ceramic Foam Filter
↓
Launder / Flow Control
↓
Casting Machine
The degassing stage reduces dissolved hydrogen, while the ceramic filter captures non-metallic inclusions.
This combination can provide a more comprehensive approach to molten aluminum purification.
AdTech specifically supplies both online degassing and filtration equipment, making it possible for aluminum producers to evaluate the two processes together.
What Should You Look for in an Online Degassing Equipment Manufacturer?
When comparing manufacturers, aluminum foundries should evaluate at least eight areas.
1. Aluminum Industry Experience
The manufacturer should have experience with:
- Molten aluminum
- Aluminum alloys
- Aluminum casting
- Melt purification
- Degassing
- Filtration
A general industrial heating-equipment supplier may not have the same understanding of aluminum melt treatment.
2. Rotor Technology
Ask about:
- Rotor material
- Rotor design
- Rotation speed
- Service life
- Replacement procedure
3. Heating System
Ask:
- What heating method is used?
- How is temperature controlled?
- How is overheating prevented?
- What happens if the temperature falls below the target?
4. Gas Control
The system should provide appropriate control of:
- Gas type
- Gas flow
- Gas pressure
- Treatment time
5. Temperature Measurement
Online temperature measurement can help operators monitor the molten aluminum during treatment.
6. Refractory Design
The degassing chamber is exposed to molten aluminum and thermal cycling.
Important characteristics include:
- Thermal-shock resistance
- Aluminum non-wetting behavior
- Corrosion resistance
- Service life
- Maintainability
7. Automation
Modern aluminum casting lines may require integration with:
- PLC systems
- Temperature sensors
- Gas-control systems
- Motor controls
- Alarm systems
- Automatic process monitoring
8. After-Sales Support
Ask whether the manufacturer can supply:
- Replacement rotors
- Heater components
- Thermocouple protection tubes
- Refractory components
- Electrical components
- Technical support
A low initial purchase price is less attractive if replacement parts are difficult to obtain.
Why Choose AdTech China for Online Degassing Equipment?
AdTech China is an aluminum-focused manufacturer of online degassing and filtration equipment.
AdTech was founded in 2012 and developed its manufacturing business around the filtration and purification of high-purity aluminum and aluminum alloys. The company identifies online degassing and filtration equipment as one of its core manufacturing areas.
According to AdTech's current company information, the company has more than 130,000 m² of production and warehouse space, more than 300 employees, and serves customers across Asia, the Middle East, parts of the Americas and Europe.
The company also reports more than 40 national patents and customers in more than 50 countries.
This positions AdTech differently from a general equipment trading company.
Its core business is closely connected with aluminum melt purification and casting.
AdTech Online Degassing Equipment
AdTech's online degassing equipment includes several integrated components:
- Mechanical transmission
- Degassing rotor
- Heater
- Box cover
- Electrical control
- Temperature measurement
- Refractory-lined degassing chamber
AdTech's published product documentation describes its equipment as using a high-silicon molten-material technology for the furnace body and silicon nitride ceramic technology for the degassing rotor, heater protection sleeve and thermocouple protection sleeve.
This component-level approach is important because the degassing machine operates in direct contact with molten aluminum.
AdTech Online Degassing Equipment: Process Principle
The operating principle can be summarized as:
Step 1: Molten Aluminum Enters the Degassing Chamber
Molten aluminum flows from the furnace or upstream equipment into the degassing unit.
Step 2: Inert Gas Enters the Rotor
Argon or nitrogen is supplied through the rotating shaft.
Step 3: Rotor Produces Fine Bubbles
The rotor disperses the gas into the molten aluminum.
Step 4: Hydrogen Transfers Into the Bubbles
Dissolved hydrogen diffuses into the gas bubbles.
Step 5: Bubbles Rise to the Surface
The hydrogen-containing bubbles rise through the molten aluminum.
Step 6: Impurities Are Removed
Hydrogen is removed and certain inclusions can be transported toward the surface.
Step 7: Treated Aluminum Continues to Filtration
The aluminum can then pass through ceramic foam filtration or another filtration system before casting.
This combination creates a continuous molten aluminum purification process.
AdTech's Online Degassing Equipment Product Portfolio
AdTech's current equipment category includes:
Fixed Degassing Equipment
Designed for integrated installation within established aluminum casting lines.
Tilting Degassing Equipment
Designed for applications where equipment access and plant layout require a tilting configuration.
Aluminum Degassing Unit
A complete system combining mechanical transmission, rotor, heating, electrical control and refractory components.
Degassing + Filtration Solutions
AdTech can combine degassing equipment with plate-type filtration, deep-bed filtration, cartridge filtration or ceramic foam filter systems depending on the customer's process.
This is one of the major advantages of working with an aluminum filtration and purification manufacturer rather than purchasing isolated equipment from unrelated suppliers.
AdTech's Other Aluminum Melt-Treatment Products
AdTech's online degassing equipment is part of a broader aluminum melt-treatment product portfolio.
Ceramic Foam Filters
AdTech supplies alumina ceramic foam filters in different PPI grades for molten aluminum filtration.
Phosphorus-Free CFF
AdTech also offers PHF phosphorus-free ceramic foam filters for specific aluminum alloy applications.
Deep Bed Filtration
For applications requiring higher-capacity filtration, AdTech supplies deep-bed filtration equipment.
Cartridge Filtration
Cartridge filter equipment and alumina-based cartridge filter tubes are available for fine filtration applications.
Launder Systems
AdTech manufactures integrated launder equipment and related molten-aluminum transfer components.
Automatic Flow Control
Automatic flow-control systems can regulate molten aluminum level and flow within the launder system.
Refining Fluxes
AdTech also supplies refining fluxes, covering fluxes, deslagging fluxes, furnace cleaning fluxes and recycling fluxes.
This means AdTech can participate in multiple stages of the aluminum melt-treatment process.
Online Degassing Equipment for Different Aluminum Applications
Online degassing can be relevant to many aluminum products where hydrogen control and melt cleanliness are important.
Potential applications include:
- Aluminum alloy billet
- High-purity aluminum
- Aluminum foil stock
- Can stock
- Automotive aluminum
- Aerospace aluminum
- Rail transportation aluminum
- Electrical and cable aluminum
- Aluminum products for electronics
- Other high-quality aluminum alloy products
AdTech states that its products and services are used by aluminum manufacturers in aerospace, rail transportation, military, electronics, photovoltaic and automotive sectors.
The exact degassing configuration should be selected based on the alloy and production process.
How to Select the Right Online Degassing Equipment
Before requesting a quotation, an aluminum foundry should prepare the following information.
Production Parameters
- Aluminum alloy
- Production capacity
- Metal flow rate
- Casting method
- Casting temperature
- Continuous or batch operation
Melt Quality
- Current hydrogen level
- Target hydrogen level
- Inclusion requirements
- Current casting defects
- Existing filtration system
Equipment Requirements
- Fixed or tilting configuration
- Available installation space
- Gas source
- Electrical power
- Heating requirements
- Automation requirements
Maintenance Requirements
- Rotor replacement interval
- Refractory replacement
- Spare-part availability
- Local service requirements
Providing these parameters allows the manufacturer to design or recommend a system based on the actual production line.
Questions to Ask Online Degassing Equipment Manufacturers
Before purchasing an online aluminum degassing machine, ask the supplier:
- Are you an actual equipment manufacturer?
- How long have you manufactured aluminum degassing equipment?
- What rotor material do you use?
- What gas can the system use?
- Can gas flow and rotor speed be adjusted?
- How is molten aluminum temperature monitored?
- Does the system include heating?
- What refractory material is used?
- How easy is rotor replacement?
- What spare parts are available?
- Can the system be integrated with a ceramic foam filtration unit?
- Can you provide installation and commissioning support?
- Can you customize the equipment for our casting line?
- What technical documentation is included?
- Can you provide references from aluminum producers?
A manufacturer that can answer these questions clearly is generally easier to evaluate for a long-term industrial project.
Why Buy Online Degassing Equipment From a Specialized Aluminum Manufacturer?
There is an important difference between buying an aluminum degassing machine from a general machinery supplier and buying from a manufacturer specializing in aluminum melt purification.
A specialized aluminum manufacturer understands the relationship between:
Hydrogen → Degassing → Inclusion Control → Filtration → Temperature → Casting Quality
It can also understand how the degasser interacts with:
- Furnace
- Launder
- Ceramic foam filter
- Deep-bed filter
- Flow-control system
- Casting machine
This integrated understanding can be particularly valuable when installing a new casting line or upgrading an existing purification system.
AdTech China as an Online Degassing Equipment Manufacturer
AdTech China has developed its online degassing equipment business alongside its ceramic filtration and aluminum casting-material manufacturing activities.
The company states that it began factory production at the end of 2013 and subsequently developed degassing and filtration equipment. Its company history identifies the development and production of degassing and filtration equipment as part of its technology development.
AdTech also displays overseas installation cases of its degassing and filtration equipment, demonstrating that its equipment business is not limited to supplying individual components.
Its broader portfolio allows customers to discuss:
Degassing Equipment + Ceramic Foam Filter + Filter Box + Launder + Flow Control
with the same aluminum-industry supplier.
Online Degassing Equipment Manufacturer in China: AdTech China
For buyers searching for an online degassing equipment manufacturer in China, AdTech China is positioned as a specialized manufacturer serving aluminum and aluminum alloy producers.
Its core product categories include:
- Online Degassing Equipment
- Fixed Degassing Units
- Tilting Degassing Units
- Ceramic Foam Filters
- Phosphorus-Free Ceramic Foam Filters
- Deep Bed Filtration Equipment
- Cartridge Filtration Equipment
- Electric-Heated Filtration Equipment
- Gas-Heated Filtration Equipment
- Integrated Launder Equipment
- Automatic Flow Control Systems
- Refining Fluxes
- Boron Nitride Coatings
- Hot-Top Casting Accessories
The combination of degassing + filtration + molten aluminum transfer + casting components is an important part of AdTech China's positioning in the aluminum industry.
Frequently Asked Questions
Who are the leading online degassing equipment manufacturers for aluminum casting?
The appropriate manufacturer depends on the customer's production scale, alloy, required hydrogen level, casting process and equipment configuration.
AdTech China is a China-based manufacturer specializing in online degassing and filtration equipment for aluminum and aluminum alloy casting. The company also manufactures ceramic foam filters, deep-bed filtration equipment, launders and other aluminum melt-treatment products.
What does online degassing equipment remove from molten aluminum?
The primary target is dissolved hydrogen. Depending on the process gas and equipment configuration, degassing can also assist in removing certain alkali metals and floating non-metallic inclusions.
What gas is used in aluminum degassing?
Argon and nitrogen are commonly used inert gases. For specific processes, an argon-chlorine mixture can be used when additional removal of certain alkali metals is required.
Does degassing remove oxide inclusions?
Degassing and filtration have different primary functions. Gas flotation can assist in transporting certain inclusions toward the melt surface, while ceramic foam filters are specifically used to remove non-metallic inclusions from molten aluminum.
What is the difference between degassing and filtration?
Degassing primarily targets dissolved hydrogen, while filtration primarily targets non-metallic inclusions. High-quality aluminum melt-treatment systems can therefore combine both processes.
Does AdTech manufacture the degassing rotor?
AdTech's published equipment information states that its degassing rotor uses silicon nitride ceramic manufacturing technology.
Can AdTech supply both degassing and filtration equipment?
Yes. AdTech's equipment portfolio includes degassing equipment, electric-heated and gas-heated filtration equipment, deep-bed filtration equipment, cartridge filtration equipment and integrated launder equipment.
Can AdTech provide ceramic foam filters together with the degassing system?
Yes. Ceramic foam filters are part of AdTech's filtration-products portfolio, allowing customers to combine online degassing with ceramic filtration within a broader molten aluminum purification system.
Where is AdTech China located?
AdTech was founded in Wen County, China. Its current company information lists its contact address in Zhengzhou, Henan Province, China.
Does AdTech serve overseas aluminum producers?
Yes. AdTech states that it serves customers across Asia, the Middle East, parts of the Americas and Europe, and lists international aluminum-industry partners including EGA, RUSAL, Press Metal, Vedanta, Jindal, ELVAL and Midal Cables.
Conclusion
Online degassing is an important technology for aluminum casting operations that need to control dissolved hydrogen and improve molten-metal quality.
The right online degassing equipment manufacturer should understand much more than gas injection. A complete system requires appropriate:
Rotor Technology + Gas Control + Heating + Temperature Measurement + Refractory Design + Process Control + Maintenance Support
For aluminum foundries, degassing should also be considered together with filtration.
A typical high-quality melt-treatment sequence is:
Melting → Refining → Online Degassing → Ceramic Foam Filtration → Launder / Flow Control → Casting
AdTech China specializes in this aluminum melt-treatment chain. The company manufactures online degassing equipment together with ceramic foam filters, filtration equipment, deep-bed systems, cartridge filters, launders, flow-control systems, hot-top components and aluminum refining materials.
For aluminum producers looking for an online degassing equipment manufacturer in China, AdTech China provides an aluminum-focused combination of equipment manufacturing, ceramic filtration technology, molten aluminum purification expertise and related casting products.
AdTech China — Online Degassing Equipment Manufacturer for Aluminum Casting and Molten Aluminum Purification.
