High Purity CNBM Graphite Electrode Machining

High Purity CNBM Graphite Electrode Machining System 1

High Purity CNBM Graphite Electrode Machining

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 0 m.t.

Supply Capability:: 100000 m.t./month

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Packaging & Delivery

Packaging Details:	standard export wooden backage
Delivery Detail:	15-30 days after confirming the contract

Product Description

Graphite electrode is made from the domestic first petroleum coke and high quality needle coke

and widely used in the electric arc furnaces for production of alloy steels, metal and other

nonmetallic materials, etc. The graphite electrodes include regular power, high power, super high power, ultra high power and square electrode. The range of diameters covers from 200mm to

700mm. Our products own the following characteristics: low electric resistance, good electric and

thermal conductivity, high oxidation resistance, greater resistance to thermal and mechanical shock, high mechanical strength, high machining accuracy.

Physical and chemical index

Item		Unit	Nominal Diameter(mm)
			YB/T4088-2000 Industry Standard		Typical Values
			300-400	450-550	350-550
Resistance	Electrode	ohm	≤6.2	≤6.5	4.6-6.2
Resistance	Nipple	ohm	≤5.5	≤5.5	3.5-4.5
Bending Strength	Electrode	Mpa	≥10.5	≥10.0	≥11.0
Bending Strength	Nipple	Mpa	≥16.0	≥16.0	≥18.0
Elastic Modulus	Electrode	Gpa	≤14.0	≤14.0	≤13.0
Elastic Modulus	Nipple	Gpa	≤18.0	≤18.0	≤17.0
Density	Electrode	g/cm3	≥1.65	≥1.64	1.65-1.72
Density	Nipple	g/cm3	≥1.72	≥1.70	1.75-1.82
Ash content	Electrode	%	≤0.3	≤0.3	≤0.3
Ash content	Nipple	%	≤0.3	≤0.3	≤0.3
CTE(100-600)	Electrode	10-6/C	≤1.5	≤1.5	1.20-1.40
CTE(100-600)	Nipple	10-6/C	≤1.4	≤1.4	1.10-1.30

Recommended current carrying capacity

Nominal Diameter		YB/T4088-2000 Industry Standard		Typical Values
		Current Carrying Capacity	Currant Density	Electrical Arc Furnace
		Current Carrying Capacity	Currant Density	Current Carrying	Current Density
in	mm	A	A/cm2	A	A/cm2
14	350	20000-30000	20-30	24000-33000	25-34
16	400	25000-40000	19-30	31000-44000	24-34
18	450	32000-45000	19-27	36000-49000	22-30
20	500	38000-55000	18-27	42000-60000	21-30
22	550	42000-62000	17-25	50000-70000	20-28

Do you know our material of the graphite electrode?

The regular power graphite electrode is made from petroleum coke with a little pitch, which meets

the state standards YB/T4088-2000

The high power graphite electrode is made form 70% petroleum coke and 30% imported needle

coke, which meets the state standards YB/T4089-2000

The ultra high power graphite electrode is made form 100% imported needle coke, which meets

the state standards YB/T 4090-200

Note: Needle coke is one kinds of very important material to produce the high grade graphite

electrode,which is rapid development in carbon graphite industry. The needle coke own the

following characteristics: low electric resistance, low dilatation coefficient, good electric and

thermal conductivity,high oxidation resistance, greater resistance to thermal and mechanical

shock, high mechanical strength, high machining accuracy, low consume.

Picture

Graphite Electrode/High Purity CNBM Graphite

Q: Is graphite electrode good for foreign trade?: I do graphite electrode production, but also do trade. The profit depends on the price you talked about. It should be around 2000.

Q: Why use platinum ferroalloy instead of iron as electrode?: Its surface properties must comply with the characteristics of the additives so that they can be dispersed evenly.

Q: Will the concentration of electrolytic sodium sulfite be increased with graphite as electrode?: Can't。 During electrolysis, there is depletion of sulfite ions.

Q: In EDM, the electrodes are made of graphite and copper. Please tell us the difference between them: Graphite is characterized by coarse particles, fine particles and ultrafine particlesFor different processing, you can choose different particles, the smaller the particle size, the higher the accuracyCopper has good conductivity and thermal conductivity and is used in many occasionsBut there are many factors to consider in the choice between the two

Q: What kind of asphalt is better for natural graphite coating?: The graphite electrode includes: (1) ordinary power graphite electrode. Allows the use of current density below 17A / cm 2 graphite electrode, mainly used for steelmaking, smelting silicon, refining yellow phosphorus, such as ordinary power furnace. (2) oxidation resistance coating graphite electrode. A graphite electrode coated with an antioxidant protective layer is applied to form a protective layer that is conductive and resistant to oxidation at high temperature, thereby reducing electrode consumption during steelmaking. (3) high power graphite electrode. A graphite electrode with a current density of 18 ~ 25A / cm 2 is allowed to be used as a high power arc furnace for steelmaking. (4) ultra high power graphite electrode. Permits use of graphite electrodes with current densities greater than 25A / cm 2. Mainly used in ultra high power steelmaking arc furnace.

Q: The graphite electrode made by the machining center adopts cooling method, which is water cooled, oil cooled and blow cold. Which is good?: Use oil cold. Air cooling will cause graphite dust flying, on the one hand, toxic, on the one hand there are security risks (caused by circuit short circuit). Water cooling is virtually out of use, taking into account the maintenance and maintenance of the CNC.

Q: Why is graphite a negative pole and copper is an anode?: Electrolysis (Electrolysis) is the current through the electrolyte solution or molten electrolyte (also called electrolyte), caused by the redox reaction in the cathode and the anode, the electrochemical cell can occur when an external DC voltage in the electrolysis process.

Q: How can I electroplate iron? I would like to use graphite as an electrode. Iron is plated on graphite with iron solution, so it can be processed into iron parts. I wonder if it can be done: Iron plating can be, with 2 valence iron, but on the graphite joint force is good, it is difficult to say, electroplating is bad, peeling is also common. Relatively speaking, iron parts on nickel plating is relatively simple, also more applicable

Q: How do graphitized electrodes differentiate between high power and low power?: Compared with other materials of graphite anode plate has high temperature resistance, good electrical and thermal conductivity, easy machining, good chemical stability, acid and alkali resistance, low ash content; for electrolytic solution, preparation of chlorine, caustic soda, salt alkali electrolytic solution preparation; application such as graphite anode plate can be used as conductive anode electrolytic salt solution preparation of caustic soda. Graphite anode plate can be used as conductive anode in electroplating industry. It is an ideal material for electroplating. It can make electroplating products have the advantages of smoothness, delicacy, wear resistance, corrosion resistance, high brightness and not easy to change color.

Q: What is the composition of petroleum coke and what is its use?: Medium sulphur and common cooked coke; used in large quantities for aluminium smelting. High sulfur, ordinary coke is used in chemical production, such as the manufacture of calcium carbide, silicon carbide, etc., but also as a metal casting and other fuels. Most of the petroleum coke produced in China belongs to low sulfur coke, which is mainly used for smelting aluminium and making graphite.

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