Graphite Rotor/Degassing Device/Aluminum Degassing System

Specifications

graphite rotor
1.density:1.68-1.85g/cm3
2.grain size:325um max
3.anti-oxidation treatment
4.High thermal conductivity

  STA Graphite Rotor

1.Product description    

 

1)working principle:

Transmission system drives the graphite rotor rotation,High-speed rotating graphite rotor to break up the blown inert gas (argon or nitrogen) into bubbles, meanwhile Make the hydrogen and impurity in melt to spread. Bubbles absorb hydrogen and adhere to impurity then brought up to the surface.

 

2)property:

• high mechanical strength,
• high temperature resistance,
• corrosion resistance,
• anti-oxidation,
• durable service life

3)speed and dimension:

Graphite rotor speed can be adjusted by frequency converter to achieve stepless control up to 700 r/min .

graphite rotor dimension Φ70mm~250 mm,

graphite impeller dimension Φ85mm~350 mm

 

4)shape design:

streamline shape can reduce the rotationg resistance and friction force, So as to make the degassing rate over 50%, shortening smelting time and reduce the production cost.

 

 2. Operation instruction:    

 

1)preheating before use:

preheat 5min~10min above the smelting liquid; pass gas through rotor before immersing in liquid; stop gas supply after the rotor pulled out liquid to prevent the rotor nozzle blocked

2) Isolate air:

 pass nitrogen or argon into purifying box, ensure positive pressure inside, Isolation outside air to prevent rotor oxidation

3)immersion depth:

 keep strengthen jacket 80 mm above the aluminum liquid level, level 60 mm below the liquid

4)Transmission system smoothly:

 Graphite rotor and transmission system was conducted by connecting rod, Avoid using deformation or loose    connection rod

5)pure argon or nitrogen :Avoid impured argon or nitrogen gas into aluminum melt.

 

3.Technical data:     

 

Items		Unit	Specifications
Biggest Grain Size		mm	0.8
Bulk Density		g/cm3	1.65-1.78
Resistivity		μΩ·m	6.0-11.0
Bending Strength		MPa	10.0-18.0
Youngs Modulus		GPa	8.0-14.0
Thermal Expansion Coefficient (100-600)		×10-6/	1.50-3.55
Rods	Diameter	mm	75-400
	Length	mm	1000-2200
Blocks Plates	Length	mm	1000-1900
	Width	mm	200-850
	Height	mm	50-600