Description

Graphite electrode is made of petroleum coke and needle coke as raw materials, coal tar pitch as a binder, and is made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. It is released in the form of electric arc in an electric arc furnace Electric energy is a conductor that heats and melts the charge.

According to its quality index, it can be divided into ordinary power graphite electrode, high power graphite electrode and ultra high power graphite electrode.

The main uses of graphite electrodes include:

(1) For electric arc steelmaking furnace

Electric furnace steelmaking is a big user of graphite electrodes. The output of electric furnace steel in my country accounts for about 18% of the output of crude steel, and graphite electrodes for steelmaking account for 70% to 80% of the total consumption of graphite electrodes. Electric furnace steelmaking uses graphite electrodes to introduce current into the furnace, and uses the high temperature heat source generated by the arc between the electric part and the charge for smelting.

(2) Used for submerged electric furnace

The submerged electric furnace is mainly used for the production of industrial silicon and yellow phosphorus. Its characteristic is that the lower part of the conductive electrode is buried in the charge to form an arc in the charge layer, and the heat energy from the resistance of the charge itself is used to heat the charge, which requires current High-density submerged electric furnaces need graphite electrodes. For example, about 100 kg of graphite electrodes are consumed for every 1 ton of silicon produced, and about 40 kg of graphite electrodes are consumed for every production of 1 ton of yellow phosphorus.

(3) for resistance furnace

Graphitization furnaces for producing graphite products, melting furnaces for melting glass, and electric furnaces for producing silicon carbide are all resistance furnaces. The materials in the furnace are both heating resistors and objects to be heated. Generally, conductive graphite electrodes are embedded at the end of the resistance furnace. In the furnace head wall of the part, the graphite electrode used here is discontinuously consumed.

(4) Used to prepare special-shaped graphite products

The blanks of graphite electrodes are also used for processing into various crucibles, molds, boats and heating elements and other special-shaped graphite products. For example, in the quartz glass industry, 10t of graphite electrode blanks are required to produce 1t of fused tubes; 100kg of graphite electrode blanks are required to produce 1t of quartz bricks.

Graphite electrode

Precautions for the use of graphite electrodes

Graphite electrode is an emerging electrode product in the current electrical industry. Compared with traditional electrodes, it has many advantages such as more stability, lighter weight, stronger conductivity, energy saving and environmental protection. In the daily use process of graphite electrodes, Need to pay attention to the following aspects in order to better protect the function of the electrode.

1. Keep dry

Graphite materials need to maintain a good degree of dryness during use. Therefore, when using this type of electrode, you must first check whether the surface is dry. If there is moisture, it cannot be used, but a special dehumidification process is required to make the graphite It can be used again after it is dry.

2. How to clean up

General graphite electrode products don’t seem to pay too much attention to cleaning, while graphite electrodes are different. It must be cleaned to avoid water and oil. Generally, compressed air is used for cleaning in the use environment, so that it can achieve Very good cleaning effect without polluting the electrode.

3. Hanging and placing

In the use of graphite electrodes, it is often necessary to hoist and assemble it, and when hoisting, pay attention to lifting the middle part of the electrode, and then turn its head down, and place it with a soft cushion. In this way, the entire electrode can be protected from vibration and damage, and the next installation can be carried out.

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