Author: graphelectrode.com

The graphite electrode is an important high-temperature conductive material for electric steelmaking, and the electric energy is input to the electric furnace through the graphite electrode. How is Graphite Electrode Made? RS Graphite Electrode Supplier will talk about the question.

The preparation process of graphite electrodes has been continuously developed with the improvement of steelmaking requirements. In general, graphite electrode manufacturers use petroleum coke and needle coke as aggregate, and coal asphalt as binder. A high temperature resistant graphite conductive material produced by a series of processes such as kneading, molding, baking, dipping, graphitization, and mechanical processing.

Graphite Electrode Production Process

1.Calcination

The carbonaceous raw material is heat-treated at a high temperature to discharge the moisture and volatile matter contained therein, and the production process for improving the original cooking performance is called calcination. Generally, the carbonaceous raw material is calcined by using gas and its own volatile matter as a heat source, and the maximum temperature is 1250-1350 °C.

Through calcination, the microstructure and physicochemical properties of the carbonaceous raw materials have undergone profound changes. Mainly reflected in the increase of coke density, mechanical strength and electrical conductivity, improve the chemical stability and oxidation resistance of coke, laid the foundation for the subsequent process.

2.Kneading

At a certain temperature, the quantitative carbonaceous pellets and powders of various sizes are stirred and uniformly mixed with the quantitative binder, and the process of kneading the plastic paste is called kneading.

3.Molding

The molding of the carbon material refers to a kneaded carbon paste which is plastically deformed under an external force applied by the molding apparatus. The process of forming a green body (or raw product) having a certain shape, size, density, and strength.

4.The Operation of Extrusion

Discharge the volatiles and reduce to a suitable temperature (90-120 ° C) to increase the adhesion, so that the blockiness of the paste is evenly favorable for molding. After molding, the green body needs to be inspected: bulk density, appearance tapping, profiling, and the like.

5.Baking

Calcination is a process in which a green product of a carbon product is placed under a protection of a filler and charged into a specially designed heating furnace for high-temperature heat treatment to carbonize the coal pitch in the green body. The bitumen coke formed after the coal pitch is carbonized, and the carbonaceous aggregate and the powder particles are consolidated together. The charcoal after calcination has high mechanical strength, low electrical resistivity, good thermal stability and chemical stability.

RS Graphite Electrode Supplier

Because of graphite electrodes have a wide range of applications in electric steelmaking. Although the graphite electrodes production process is complicated, the production cycle is relatively long. However, RS graphite electrode suppliers strictly review each production process and lay a solid foundation for the production of high quality graphite electrodes.

The RS graphite electrode supplier has undergone a rigorous graphite electrode production process. It has a high quality and is a graphite electrode product that can meet the high quality steelmaking needs. Feel free to contact us for more information on graphite electrodes. Want to learn more info about graphite electrode price, please mailto us now. We will get back to you as soon as possible.

We all know that ultra-high power graphite electrodes can refine molten steel, further remove impurities and improve purity. RS UHP Graphite Electrode for Sale in Russia. Provides reliable protection for high quality steel making. RS graphite electrodes have been sold to Russian country for many times and have received favorable comments from customers.

Graphite Electrode for Salse in RussiaThe use of high-power and ultra-high-power electric furnace steelmaking can shorten the melting time of the furnace, increase production efficiency, reduce electricity consumption and reduce the consumption of graphite electrodes. The industrial development of the Russian state, many steel mills need to use higher quality graphite electrodes to produce higher quality steel. Therefore, as a neighboring country, China provides high quality uhp graphite electrode for sale to Russia, which has a good geographical advantage.

When graphite electrode manufacturers produce graphite electrodes, especially in the production of uhp graphite electrodes, high-grade needle coke must be used, and the graphitization heat treatment should be carried out in the internal string graphitization furnace. The graphitization temperature is as high as 2800 ~ 3000 °C. Therefore, the uhp graphite electrode has a lower resistivity, allows a larger current density, has a smaller coefficient of linear expansion, and has excellent thermal shock resistance.

In the application field of graphite electrodes, the ore furnace is mainly used for the production of ferroalloys, pure silicon, yellow phosphorus, matte and calcium carbide. It is characterized in that the lower portion of the conductive electrode is buried in the charge. Therefore, in addition to the heat generated by the arc between the electric plate and the charge, when the electric current passes through the charge, heat is generated due to the electrical resistance of the charge. About 1.6kg of graphite electrode is consumed per ton of silicon, and about 40kg of graphite electrode is consumed per ton of yellow phosphorus.

Further, in the use of the graphite electrode, it is necessary to use graphite electrodes of different diameters depending on the size of the electric furnace. In order to continuously use the electrodes, the electrodes are connected by graphite electrode nipples. The graphite electrode for steelmaking accounts for about 70-80% of the total amount of graphite electrode.

In RS Graphite Electrode Manufacturer, graphite electrode has low resistivity, low ash, uniform structure, good thermal shock resistance, high mechanical strength, and heat. The advantages of low expansion coefficient, precision of graphite electrodes and garphite electrode nipples, etc. are excellent materials for electric steelmaking and ore furnace smelting. If you want to learn more about the uhp graphite electrode for sale, please contact us and we will get back to you in the shortest time.

To purchase HP graphite electrodes for steelmaking, find HP graphite electrode manufacturers. With ten years of steel processing with HP graphite electrode processing technology, quality assurance, the industry has sold tens of thousands of HP graphite electrodes for steelmaking. RS Manufacturer owns mature technology, advanced HP steel graphite electrode equipment, and perfect after-sales service have maintained a good reputation. Free Quote by Email: info@graphelectrode.com .

In electric furnace steelmaking, scrap steel is used as the main raw material, and three-phase alternating current is used as the power source. The electric current is heated and melted by the high temperature of the arc generated between the graphite electrode and the metal material, and is used to produce special steel and high alloy steel. The main method. At present, with the increasingly strict environmental protection, electric steelmaking has also shown a strong competitive situation in the field of general steel.

The HP graphite electrode for steelmaking, as the conductive electrode of the electric furnace steelmaking, plays an important role in the stable operation of the electric furnace steelmaking during the steelmaking process. The graphite electrode in the center of the DC arc furnace is added to the electric furnace as a cathode, and the bottom electrode is an anode. It is composed of two horizontal metals. The metal plate is provided with a gas-conducting cooling fin. Many stylus pins are attached to the metal plate, and magnesia is built between the stylus. filling. The current is introduced into the stylus through the horizontal metal plate at the bottom of the furnace and then passed into the molten pool. In this method, the consumption of the steelmaking electrode is relatively low, only half of the three-phase alternating current arc furnace, and the production cost is low, but the advantages and disadvantages coexist, and the combination of the graphite-magnesia brick is also easy to increase the carbon content.

Therefore, in the steel making process, the electrode oxygen consumption is minimized, the electrode sublimation consumption is reduced, the dissolution and spalling are reduced, the electrode is properly used, the breakage is reduced, and the electrode maintenance is enhanced, and the electrode consumption can be effectively reduced. . At the same time, the application of new processes and new technologies can also reduce their consumption indirectly.

In addition to HP graphite electrode products for steelmaking, Rongsheng also provides anti-oxidation high-power graphite electrodes, metallurgical furnace graphite electrodes, ultra-high power graphite electrodes (UHP), ordinary graphite electrodes (RP), high-power graphite electrodes (HP), UHP/HP400/ 450/550/600 ultra-high power graphite electrode, steelmaking electric furnace graphite electrode, electric arc furnace graphite electrode, EDM graphite electrode for electric discharge machining, etc. If you are looking for the hp graphite electrodes, please contact us. We will give you back as soon as possible!

Carbon graphite electrode is a general term for common graphite electrodes. Can be divided into natural graphite electrodes, artificial graphite electrodes and so on. Graphite electrodes are mainly used for electrodes for various electric arc furnaces; artificial graphite electrodes are also used for various electrolysis electrodes such as alkali metals and alkaline earth metals. In general, carbon graphite electrode is widely used in metallurgical, chemical and other industries.

Carbon Graphite Electrode Classification

Carbon graphite electrode can be mainly classified into the following six types depending on the production method, and they will be described one by one below.

(1) Natural graphite electrode.

The natural graphite electrode is an electrode produced from natural flake graphite. The natural graphite electrode can be prepared by adding coal pitch to natural graphite and kneading, forming, baking and machining. Its resistivity is relatively high, generally 15~20μΩ·m. The biggest disadvantage of this kind of carbon graphite electrode is their low mechanical strength, which is easy to break during actual use. Therefore, only a very small number of small-sized natural graphite electrodes are now available for some special applications.

(2) Artificial graphite electrode.

The petroleum coke or asphalt coke is used as a solid aggregate and coal tar pitch as a binder. After mixing, forming, roasting, graphitizing and machining, an artificial graphite electrode (abbreviated as graphite electrode) can be prepared. The artificial graphite electrode is a high temperature resistant graphite conductive material. According to different raw materials and production processes, the carbon graphite electrode with different physical and chemical properties can be prepared and divided into ordinary power graphite electrodes, high power graphite electrodes and ultra high power graphite electrodes.

(3) Anti-oxidation coated graphite electrode.

The anti-oxidation coated graphite electrode adopts “alternating spray-sintering method” or “solution impregnation method” to form an anti-oxidation coating on the surface of the processed graphite electrode to reduce the oxidation consumption of the graphite electrode. The price of this like carbon graphite electrode has been increased, and there are some problems in its use. Therefore, there is currently no widespread promotion of the use of anti-oxidation coated graphite electrodes in China.

(4) Water-cooled composite graphite electrode.

The water-cooled composite graphite electrode is a conductive electrode that is used after the graphite electrode is bonded to a special steel pipe. Since the operation of connecting the electrodes is troublesome and affects the production efficiency of the electric furnace, it has not been widely used at present.

(5) Hollow graphite electrode.

The hollow graphite electrode is directly pressed into a hollow tube when the electrode is formed or drilled at the center of the electrode during processing, and the other production processes are the same as those of the artificial graphite electrode. The production of hollow graphite electrodes can save carbonaceous raw materials and reduce the weight of the hoisted graphite electrodes. By using the hollow zone passage of the graphite electrode, it is also possible to add the alloy material and other materials required for steel making or to pass the required gas. However, the molding process for producing hollow graphite electrodes is complicated, the raw material saving is limited, and the preparation yield is low, so the hollow kind of carbon graphite electrode is not widely used.

(6) Regenerated graphite electrode.

The regenerated graphite electrode is prepared by using recycled artificial graphite scrap and powder as raw materials, and adding coal tar pitch by kneading, molding, roasting and machining. Relative to the coke-based graphite electrode, such a carbon graphite electrode’s resistivity is too large and its performance index is poor. At present, only a small number of small-sized regenerated graphite electrode products are used in the field of refractory production.

Carbon Graphite Electrode Manufacturer

In summary, most of the above graphite electrodes cannot be widely applied to actual production. Therefore, what we usually call, the carbon graphite electrode used in the smelting field can be considered as an artificial graphite electrode, that is, graphite electrode. RS graphite electrode supplier, to provide customers with high quality graphite electrode, if you need hp graphite electrodes, please contact us. We will respond to you in the shortest time.

The uhp graphite electrode (also called ultra-high power graphite lectrode) currently produced in China are 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, and 700mm in diameters; the lengths are 1600mm, 1800mm, 2000mm, 2400mm, and 2700mm. RS Supplier, provide all kinds of graphite electrodes for customers. If you are looking for uhp graphite electrodes price, production processing, and the quality index, Email to US, we will give you back as soon as possible.

China’s graphite electrode quality standard (YB/T 4090 – 2000) has defined six physical and chemical indicators for the quality evaluation of uhp graphite electrode. Among them, Electrical Resistivity, Bending Strength, Elastic Modulus, Bulk Density and CTE(coefficient of thermal expansion) are used as indicators for quality assessment, and ash is used as a reference index.

UHP Graphite Electrode Physical and Chemical Index (Quality Standard)
Item	Unit	Diameter of electrode 300mm-600mm
		Standard		Actual measurement
		Electrode	Nipple	Electrode	Nipple
Electrical Resistivity, ≤	μOhm • m	7.0-7.5	6.5	6.5-7.0	5.0
Bending Strength, ≥	MPa	9.8-10.5	14	12-15	15-18
Elastic Modulus, ≤	GPa	12	16	12	14
Ash Content, ≤	%	0.3	0.3	0.3	0.3
Bulk Density, ≥	g / cm3	1.6	1.7	1.68-1.73	1.75
CTE(100-600℃), ≤	× 10-6 / ℃	2.4	2.2	2.2	2.0

RS Graphite Electrode Supplier, is a manufacturer of ultra-high power graphite electrodes. Our uhp graphite electrode products are produced in strict accordance with national quality standards. If you need a special quality index for graphite electrodes, please contact us with your quality requirements, we can customize graphite electrode products for you.

The Arc Furnace Electrodes refers to a conductor material in which an EAF furnace discharges electric energy in the form of an electric arc to heat and melt the charge. It mainly uses petroleum coke and needle coke as raw materials, coal tar pitch as binder, and is made by calcination, compounding, kneading, pressing, roasting, graphitization and machining. According to the quality index, it can be divided into rp graphite electrode, hp graphite electrode and uhp graphite electrode.

The steelmaking EAF furnace uses graphite electrode as a conductive material, and transfers the heat energy to the charge through the arc discharge to melt the charge. Commonly, an Arc Furnace Electrodes have three electrodes, each of which is composed of 3 to 4 electrodes connected by a graphite electrode nipple(tapered joint) . The electrodes are clamped by a gripper at the end of the cantilever. The cantilever is lifted together with the soft busbar that connects to the power supply.

The heat during smelting is caused by the arc discharge between the electrode and the metal charge. The arc formed by its tip converts electrical energy into heat for smelting. Because the Arc Furnace Electrodes are mostly in the furnace, they are subjected to the radiant heat of the high temperature furnace gas, the surface of the molten pool, the furnace wall and the arc tip of the electrode tip; the furnace gas washes the surface of the graphite electrode and heats the electrode by convection heating. This heat transfer is enhanced with the increase of furnace gas and material temperature and the increase of furnace gas volume.

It is because of such a harsh working environment that graphite electrode materials have some excellent or irreplaceable properties under high temperature conditions compared to other conductive materials. The Arc Furnace Electrodes can be used at a relatively high temperature, and the sublimation temperature is 3650 ° C. It is a high-temperature conductive material capable of withstanding high temperature. In actual use, no other material can be substituted; the strength of graphite increases with temperature at high temperature; graphite Compared with other metals, the coefficient of thermal expansion is the lowest.

The electric furnace is equipped with a large-capacity transformer, and the electric furnace steelmaking is moving toward a large scale. The refinement of the electric arc furnace function (melting furnace and refining furnace) has increased the demand for high quality Arc Furnace Electrodes. The diameter of the DC arc furnace with graphite electrode is calculated based on the capacity of the furnace and the allowable current density of the electrode. For an ultra-high-power electric furnace of the same input power, a DC furnace using one graphite electrode has a larger electrode diameter. For example, an AC arc furnace with a capacity of 150 t uses an electrode with a diameter of 600 mm, and a DC arc furnace of the same capacity is used. For electrodes with a diameter of 700 to 750 mm, the quality requirements of the DC arc furnace for graphite electrodes are higher than those for AC arc furnaces.

If you want to know more about the Arc Furnace Electrodes, please contact us, RS Graphite Electrode Manufacturer, we will reply you in the shortest time. Providing you with higher quality arc furnace electrodes uhp graphite electrodes is our goal!

Rongsheng graphite electrode manufacturer, large-scale production equipment and testing equipment, providing ultra-large-scale graphite materials and processing capabilities. Our graphite products mainly include graphite electrode, graphite square, graphite crucible and graphite block. Graphite electrode products are widely used in various industries. At the same time, we can process various types of graphite electrode products according to customer needs. To get the Graphite Electrodes Price, please contact us!

Rongsheng’s graphite electrodes can be used in electric arc steel furnaces, submerged arc furnaces and electric resistance furnaces according to their specifications and quality indicators.

As is known, graphite electrodes are mainly used in electric furnace steelmaking, and can also be used in industrial silicon, quartz glass, corundum and other industries. Electric furnace steelmaking uses a graphite electrode to introduce a current into the furnace, and a strong current generates an arc discharge through the gas at the lower end of the electrode, while releasing a large amount of heat for smelting.

Main Graphite Electrodes and Specifications:
1, ordinary power electrode φ150-500MM
2, high power electrode φ350-500MM
3, high body dense electrode φ250-500MM
4, ultra high power electrode φ500MM

The production and processing of RS graphite electrodes has passed the Quality Certification Center, and our graphite electrode products have passed the IS09001: 2000 quality system certification. Rongsheng graphite electrode products use cracked petroleum coke, needle coke and coal-based asphalt as the main raw materials, and metallurgical coke is the main auxiliary material.

The quality inspection means is complete, the production process is rigorous, the technical operation is standardized, and the management foundation is solid. Graphite Electrodes Price per Ton, Rongsheng graphite electrode manufacturer, enjoys high reputation at home and abroad, and its products are exported to Southeast Asia, South America, Europe and other countries and regions. Welcome contact us!