Aluminum Degassing Graphite Rotor

Density: 1.75g/cm³

Apparent manage: anti-oxidation

Application: Aluminum used

Material: 100% high pure molded graphite

 

 

 

Aluminum Degassing Graphite Rotor And Shaft

50 days at 700°C, 30 days at 1000 °C.

 

 

1. Without contamination of impurities

2. High resistance to high temperature, lower down oxidation speed.

3. Cutomized-machining is available in our factory. We could design and machine the graphite crucibles according to your applicaiton.

 

 

1. Excellent self-lubrication

2. Remarkable chemical corrosion resistance

3. High thermal conductivity and good thermal stability

4. Adequate mechanical strength and shock resistance

 

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
CTE(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
Products can be machined to the size as per orders

 

 

Item	Unit	Guarantee Value	Typical value	Â	Typical value
Max grain size	mm	0.8	0.8	0.8	0.8
Bulk density	g/cm³	≥1.70	1.73	≥1.73	1.76
Specific resistance	μΩ.m	≤8.5	7.5	≤8.0	7
Bending strength	Mpa	≥10.0	11	≥12.0	12.5
Compressive strength	Mpa	≥24.0	27	≥31.0	34
Thermal Condcutivity	W/(m.k)	≥120	150	≥130	160
C.T.E.(100-600)℃	10-6/℃	≤2.5	2.2	≤2.5	2.1
Ash content	%	≤0.3	0.09	≤0.3	0.09

 

Â	Â	High pure graphite
Item	Unit	Baked twice	Baked three times	Baked four times
		Impregnated once	Impregnated twice	Impregnated three time
Grain size	Mm	≤325 mesh	≤325 mesh	≤325 mesh
Bulk density	g/cm³	≥1.68	≥1.78	≥1.85
Specific resistance	μΩ.m	≤14	≤14	≤13
Bending strength	Mpa	≥25	≥40	≥45
Compressive strength	Mpa	≥50	≥60	≥65
Ash content	%	≤0.15	≤0.1	≤0.05

 

Item	Unit	Isostaic graphite
Grain size	μm	5-22
Bulk density	g/cm³	1.8-1.85
Specific resistance	μΩ.m	≤15
Bending strength	Mpa	≥40
Compressive strength	Mpa	≥85
Shore hardness	Â	≥65
C.T.E.(100-600)℃	10-6/℃	4.0-5.2
Modulus of elasticity	Gpa	10-12.5
Ash	%	≤0.03%

 

 

1. Preheating before using: before immersed in liquid aluminum, the graphite rotor need to be preheated 5 min ~ 10 min around 100 mm above the liquid surface, to avoid effect of quenching on material; pass into the gas before rotor immersed into liquid; stop supplying gas only after putting the rotor out of liquid level, in order to prevent pore jams of the rotor nozzle.

2. Air isolation: pass nitrogen or argon into purification box, ensure the pressure in box is positive pressure, and isolate outside air, to prevent the oxidation of the graphite rotor.

3. Rotor immersion depth: reasonable depth of graphite rotor immersed in aluminum melt, making the strengthening cover exposed 80 mm or so above aluminum liquid, immersed in liquid 60 mm or so below the liquid, this can effectively increase the loss of oxidation and the time of erosion wear.

4. Stable transmission system: graphite rotor and driving system is connected by connecting rod (tube). The deformation of linking rod under the long time high temperature, or the loose of transmission equipment related sites, will affect the running stability of the rotor, and easy to make the graphite rotor broken or damaged.

5. Purity of argon or nitrogen: if the impurity of argon or nitrogen caused by the air leakage of pipeline and joint parts, can make the upper rotor severely oxidized, and even make the lower several rotor jet hole oxidized, this will greatly shorten the service life of the rotor.

 

 

 

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