1.HP,NP,UHP electrode with a diameter from 100 to 800mm;2.Low consume, high useful material contents;
3.Overall design & supply for EAF, ladle, tundish and other lining;4.Punctual delivery, high end quality, and attentive service aftersale;
5.CE, ISO certified;
Graphite Electrode
Graphite electrodes are composed of a mixture of finely divided, calcined petroleum coke mixed with about 30% coaltar pitch as a binder, plus proprietary additives unique to each manufacturer.This mixture is extruded at approximately220F, the softening temperature of pitch, to form a cylindrical rod known as a "green electrode". The green electrode isnow given a controlled bake in a reducing atmosphere at temperatures as high 1800°F and again impregnated with pitchto increase its strength and density and lower the electrical resistivity.The electrodes are now ready to be graphitized, i.econverting the amorphous carbon into crystaline graphite. This is accomplished by passing an electric current throughthem and heating them to as much as 5000°F.The graphitizing consumes as much as 3000-5000kWHton of electrode.The final product is strong, dense, and has a low electrical resistivity. Lastly the electrode is machined to its final shape.Into each end of the electrode is a recess in which threads are machined.These are used to accept a threaded nipplemanufactured in the same way so that the electrode column can be lengthened as it is consumed.
Electrodes are commonly available in sizes from 15 - 30 inches in diameter varying lengths to 10 feet. They come inthree grades: regular and premium and the newer DC grade. Historically, electrode consumption has been as high as12-14 pounds per tons of steel, but through continuous improvement in electrode manufacturing and steelmaking
operations, this has been reduced to the neighborhood 3.5 to 4.5 pounds per ton. Most electrode consumption is throughoxidation and tip sublimation, with some small pieces lost around the connecting joint. A considerable portion is also lostto mechanical breakage caused by scrap scrap cave-ins in the furnace or crushing the electrode into the charge.
Refractory Brick
Refractory like Magnesia cabon bricks for electric arc furnace, ladle furnace, high quality fused magnesia and highpurity flake graphite as raw material,organic is added as binding,and a certain quantity antioxidant agent is also added.
