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Andy Group - Henan Andy High Temperature Products Co.,Ltd www.andygroup.cn
General Discription Of online degassing equipment for aluminum product
This online degassing system utilizes an ultra-long-life furnace (made of a new high-silicon melting material), high-quality silicon nitride (Si3N4) or silicon carbide (SiC) degassing rotors, high-quality Si3N4 or SiC heater protection tubes, and high-quality Si3N4 or SiC thermocouple protection tubes. This advanced production technology is used to produce high-value-added, high-performance aluminum products.
This online degassing system, installed between the furnace and the casting machine, removes hydrogen and other residues from the molten aluminum and its alloys that affect their quality and mechanical properties. It performs dual functions: treatment and heating. It is primarily used for melt purification in the production of high-precision aluminum products such as computer hard drives, color and black-and-white photoconductor drums, micron aluminum foil stock, PS substrates for printing, canning stock, aircraft landing gear (intergranular high-strength aluminum), and jet turbine engine fan blades.
Online degassing equipment Type
Type 15
Max Degassing flow
15 MT/H
Degassing Box Standard
1 room 1 rotor （1B1R）
Degassing box structure
1 draining outlet & 1 deslagging outlet
Lifting System
Hoisting type
Type 35
Max Degassing flow
35 MT/H
Degassing Box Standard
2 rooms 2 rotors（2B2R）
Degassing box structure
2 draining outlets & 1 deslagging outlet
Lifting System
Rotor mechanical lifting
Type 65
Max Degassing flow
65 MT/H
Degassing Box Standard
3 rooms 3 rotors（3B3R）
Degassing box structure
3 draining outlets 1 deslagging outlet
Lifting System
cover hydraulic lifting
Online Degassing Equipment for aluminum product Performance
It is mainly used for hydrogen (H) and slags removal from molten aluminum.It takes the gas flotation principle. The rotor takes inert gas or a mixture of chlorine and inert gas into molten aluminum and smashes the gas into dispersed tiny bubbles, the bubbles rise to the molten aluminum surface and finish the below-stated procedures at the same time:
H is being absorbed in bubbles and is being removed.
The chloride is removed (formed by chemical action with an alkali metal and chlorine gas).
Remove slags.
The efficiency of degassing equipment
Average Degassing efficiency is 60%. If use Ar and Mg content ≤1%, the efficiency can reach 0.09cc/100g.
The lining structure of the degassing equipment
The lining is made of high silicon molten material, average working life is 2-3 years. It is featured nonstick aluminum, with no contamination. There is a float stopper inside to prevent oxides from being drawn into molten aluminum and the bubbles or slags from running out.
The design standards for rotor in degassing equipment
It is made of SiN. Working life is 2-5 years. It performs well in corrosion resistance, heat shock resistance, oxidative resistance, abrasive resistance, and mechanical strength. Shaft diameter 60mm, head diameter 200mm, which shall reduce resistance in stirring. Speed design 450-550 R/M will crush bubbles and disperse them evenly into aluminum. It is cost-effective during long-time usage.
Intrusive heater protection thimble
It is made from SiN, Average service life is 1-2years, featured high heating efficiency, oxidation, and slagging prevention, and no contaminations.
The gas protection design for degassing equipment
Ar mix of N2 and chlorine is available, protection method is also designed.
Sealing structure design for degassing equipment
The sealing structure includes cover, lining, inlet, and outlet to prevent slag and improve degassing efficiency.
Degassing Box Operating Principle Diagram:
The degassing box lining , Before-and-after comparison results
（Before Use）
（After 1 Year of Use）
The degassing box lining is integrally molded from a high-silicon fused-metal material, offering excellent non-stick properties and a long service life.
Application guide of Online degassing equipment for aluminum product
Switch off the heating unit after degassing box heating is completed. Guide inert gas into the rotor and release molten aluminum into the box when the heater temperature is closed to molten aluminum temperature.
Check the sealing between inlet/outlet and launder.
Check the cone located in heat protection draining in the bottom.
Check the molten aluminum temperature (min 720°C). Make the height of molten aluminum be away from the launder bottom at 3cm for observing the molten aluminum going into the box.
The operator shall wear protective clothes to close the cover. The slag on the surface can be skimmed through the deslagging outlet when the molten aluminum flows into the box.
Start production when the temperature is up to 780°C. Close deslagging outlet for heating preservation.
Molten aluminum can be retained in the box with setting temperature during the heat preservation phase but with no molten aluminum handling.
Guide inert gases into the rotor to prevent air outlet blocking by molten aluminum.
Switch on the heater as soon as molten aluminum flow into the box is completed and set heat preservation parameters.
Starting the heating system, control the temperature of the molten aluminum, monitor the gas flow rate, and the speed of the rotor is changed from the heat preservation stage to the processing stage. At the same time, the inert gas flow into the rotor increases, and the gas flow rate is changed from the preservation stage to the processing stage.
The operator sets the molten aluminum heating temperature and maintains a stable degassing working condition.
Online degassing equipment for aluminum product lifespan
Lining≥ 2 years;
The whole unit except wearing parts ≥5 years.
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