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: How to solve the problem of graphite electrode being crushed during electrolysis: This graphite electrode is so true because it causes gas to expand and disintegrateTantalum electrodes can be solved and not expensive

Q: What is the reason that the current cannot be increased when the graphite electrode is used for anode electrolysis?Add calcium chloride and sodium bicarbonate into electrolytic water: Because in the process of electrolysis of water in cathode electron generated hydroxyl, the alkaline solution increased. But with the hydroxyl reaction of sodium carbonate and sodium bicarbonate, carbonate and calcium ions exist at the same time, must produce the precipitation of calcium carbonate, the ion in the solution is reduced, thereby conductive resistance increases. Thus weakened over time current cannot be raised

Q: The use of graphite as an electrode in alumina electrolysis: The technical knowledge of electrolytic aluminum, cleaning and maintenance of alumina equipment, you can search for Baidu on the green, looking for.

Q: Specification for graphite electrodes commonly used in steel works: General specification for graphite electrode diameter Phi 300 Phi 500mm, Phi Phi 550 - the current usage of 800mm graphite electrodes is also great, the graphite electrode length was between 1600 and 2700mm.

Q: The original battery is not necessary to form the electrode potential? Why can we use graphite as electrode only? No potential difference.: Indeed, the original battery electrode potential using two different electrodes, produce potential difference, so that the electron flow generated current. Graphite is used as an electrode because of its excellent electrical conductivity and stability

Q: The difference between graphite electrode and graphite rod: The two materials are different.Graphite electrode is mainly in the petroleum coke and needle coke, coal tar pitch as binder, calcination, mixing, kneading, pressing, baking and graphitization, and made the processing machine, is a conductor in an electric arc furnace to form arc release electricity for heating and melting of the charge, according to the quality index level, can is divided into ordinary power, high power and ultra high power.

Q: MITSUBISHI machine graphite electrode processing, how does not accumulate carbon?: The three is difficult cold start, is sparking difficult, not easy car, and finally the combustion chamber carbon Yan will cause a heavy cylinder knock, low speed and acceleration noise, causing damage to the piston and crankshaft, causing the engine temperature which can seriously affect the automobile safety. Emission standards exceeded, not only through the annual inspection, but also directly aggravate the pollution of the environment

Q: Graphite electrode press device: (1) ordinary power graphite electrode, using graphite electrode with current density lower than 17A / cm 2, is mainly used in steel-making, smelting silicon, refining yellow phosphorus and other common power electric stove(2) anti oxidation coating graphite electrode. The surface is coated with an anti oxidation protective layer of graphite electrode to form a protective layer which has both conductive and high-temperature oxidation resistance, thus reducing the electrode consumption during steelmaking

Q: Jiqiu conductive graphite electrode, how to compare with copper is relatively large resistance value?: Look at what kind of graphite electrode you need. Now, the resistivity of ordinary power graphite electrode in our factory is 7.5-8.5. It is not clear that the graphite electrode is dipped in 6--7.3. copper

Q: 800KVA and 12500 EAF transformer data graphite electrode furnace.: The graphite electrode must be roasted by a cathode or anode baking furnace, and a large amount of harmful gas and dust will be produced during the roasting process.

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