High Purity CNBM Graphite Electrode Machining

High Purity CNBM Graphite Electrode Machining System 1

High Purity CNBM Graphite Electrode Machining

Ref Price:

Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 0 m.t.

Supply Capability:: 100000 m.t./month

Inquire Now

Add to My Favorites

OKorder Service Pledge

Quality Product, Order Online Tracking, Timely Delivery

OKorder Financial Service

Credit Rating, Credit Services, Credit Purchasing

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: Why is graphite conductive electrode oxidized?: Graphite electrode uses petroleum coke (carbon), pitch coke (carbon) as granule material

Q: Why should supercapacitors use graphite as electrode material?: Because graphite material processing speed is fast, the cost is low.

Q: Thermal expansion coefficient of graphite: In the graphite electrode, the national standard, the volume density in more than 1.60 of both high power graphite electrode, of course because of the national standard index is low now, the volume density of normal power graphite electrode factory can reach 1.65, such as Chengde and long carbon factory.

Q: Use of graphite in steelmaking: At present in the world (MgO-C brick raw material for graphite and magnesium) as refractory material, has been widely used in steelmaking, has become a traditional use of graphite.

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 reason why graphite is used as electrode: The graphite has good conductivity and thermal conductivityThe conductivity of graphite is one hundred times higher than that of ordinary non-metallic minerals. Heat conductivity exceeds steel, iron, lead and other metal materials. The coefficient of thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, the graphite becomes hot.

Q: Synthesis techniques of carbon nanotubes: Carbon nanotube discharge using graphite electrode is one of the earliest studies in various synthetic techniques. The researchers did a lot of work in optimizing arc discharge for carbon nanotubes. In recent years, in addition to people by adjusting the current and voltage, pressure and velocity change, change the electrode composition, improved electrode feeding mode optimization of arc discharge process, but also through changes the arc medium, simplified arc device. In the process of preparing carbon nanotubes, arc method is mature by changing the arc discharge conditions, catalyst, electrode size, feed mode, the distance between the poles and the raw materials. The carbon nanotubes formed by arc method are straight and wall (multi wall or even single wall). But the production rate is low, the arc discharge process is difficult to control, and the preparation cost is too high. The industrial scale production needs to be explored.

Q: Which department in the steel plant needs graphite in large quantities?: For steel and iron alloys, graphite electrodes are used, when powerful currents pass through electrodes into the melting zone of the electric furnace to produce an arcThe electric energy is converted into heat energy, and the temperature is increased to about 2000 degrees, so as to achieve the purpose of smelting or reaction. In addition, the electrolytic goldWhen the magnesium, aluminium and sodium are used, the anode of the electrolytic cell is also made of graphite electrode. The resistance furnace for carborundum is also made of graphite electrode as the burnerConductive material.

Q: How can the graphite powder be processed into high quality carburizing agent? Thank you: Basically, it can no longer be a "good" carburizing agent

Q: Electrolysis of CuCl2 solutions with graphite electrodes: After energization, electrolysis occurs, not ionizationIonization does not require energization, and can occur in aqueous or molten state.

Send your message to us

*Email

*TEL

*Quantity

*Unit