Graphite electrodes belong to non-metallic mineral products. Graphite electrodes are mainly made of petroleum coke and needle coke as raw materials, coal tar pitch as a binder, and are made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. The conductor that releases electric energy in the form of an electric arc to heat and melt the charge in an electric arc furnace can be divided into ordinary power, high power and ultra-high power according to its quality index. Graphite electrodes mainly include four types of ordinary power graphite electrodes, anti-oxidation coating graphite electrodes, high power graphite electrodes and ultra-high power graphite electrodes.

Graphite electrode price

The price of graphite electrodes has risen severely in 2018, please buy according to the market!

Classification of graphite electrodes:

1. Ordinary power graphite electrode

Graphite electrodes with a current density of less than 17A/cm2 are allowed, which are mainly used for ordinary power electric furnaces for steelmaking, silicon making, and yellow phosphorus making.

2. Anti-oxidation coating graphite electrode

Graphite electrode coated with an anti-oxidation protective layer (graphite electrode antioxidant). Form a protective layer that is both conductive and resistant to high temperature oxidation, reducing electrode consumption (19%-50%) during steelmaking of Juxing Carbon Graphite Electrodes, extending the service life of the electrodes (22%-60%), and reducing the electrical energy of the electrodes Consumption. The promotion and use of this technology can bring about such economic and social effects:

①The unit consumption of graphite electrode is less, and the production cost is reduced to a certain extent.

②The graphite electrode consumes less electricity, which saves electricity consumption per unit of steelmaking, saves production costs and saves energy.

③As the graphite electrode is replaced less frequently, the labor and risk factors of the operators are reduced, and the production efficiency is improved.

④Graphite electrodes are low-consumption and low-polluting products, and they have very important social significance today when energy conservation, emission reduction and environmental protection are promoted.

3. High-power graphite electrode

Graphite electrodes with a current density of 18-25A/cm2 are allowed, which are mainly used in high-power electric arc furnaces for steelmaking.

4. ultra-high power graphite electrode

Graphite electrodes with a current density greater than 25A/cm2 are allowed. Mainly used for ultra-high power steelmaking electric arc furnace.

How to distinguish the quality of graphite electrodes

1. Bulk density. 2. Look at the resistivity. 3. Weight 4. The most important thing is the coefficient of thermal expansion. The surface is not damaged or cracked, and the surface is smooth. and many more

What is the difference between graphite electrode and carbon rod?

The difference between graphite electrode and carbon rod is that the former is mainly made of graphite, and the latter is carbon material.

Graphite electrode is made of natural graphite mixed with petroleum coke and pitch coke after being pressed and molded, and then subjected to high-temperature graphitization treatment, the overall composition of the material is graphite;

The material of the carbon rod is also carbon, but it does not contain graphite. The sintering temperature after molding is only over 1,000 degrees, and the graphitization process is not performed.

What are the advantages of ultra-fine graphite electrodes

1. The increasing complexity of mold geometry and the diversification of product applications have led to higher and higher requirements for discharge accuracy of spark machines. The advantages of graphite electrodes are easier processing, high removal rate of electrical discharge machining, and low graphite loss. Therefore, some group-based spark machine customers have abandoned copper electrodes and switched to graphite electrodes. In addition, some special-shaped electrodes cannot be made of copper, but graphite is easier to form, and copper electrodes are heavy and not suitable for processing large electrodes. These factors have caused some group-based spark machine customers to use graphite electrodes.

2. Graphite electrodes are easier to process, and the processing speed is significantly faster than copper electrodes. For example, the use of milling technology to process graphite is 2 to 3 times faster than other metal processing and does not require additional manual processing, while copper electrodes require manual grinding. Similarly, if the graphite electrode of a high-speed graphite machining center is used

Manufacturing electrodes will be faster, more efficient, and will not cause dust problems. In these processes, choosing tools with appropriate hardness and graphite can reduce tool wear and copper damage. If you specifically compare the milling time of graphite electrodes and copper electrodes, graphite electrodes are 67% faster than copper electrodes. In general electrical discharge machining, the processing of graphite electrodes is 58% faster than copper electrodes. In this way, processing time is greatly reduced, and manufacturing costs are also reduced.

3. The design of the graphite electrode is different from the traditional copper electrode. Many mold factories usually have different reservations for roughing and finishing of copper electrodes, while graphite electrodes use almost the same reservations. This reduces the number of CAD/CAM and machine processing. For this reason alone, Enough to improve the accuracy of the mold cavity to a large extent.