Dosage of carbon materials is one of the largest purpose as -arc furnace of conductive electrode is used, since -arc furnace furnace type different design parameters, the need of different electrode quality parameters, general steel blast furnace with graphite electrode, smelting high purity silicon using carbon electrodes, which used calcium carbide and ferroalloy -arc furnace of electrode is self baking anode more, since the prebaked anode electrode paste as raw material, in -arc furnace process of roasting electrode.
Graphite electrode mainly petroleum coke, needle coke as raw material, coal asphalt binder, calcination, ingredients, kneading, molding, baking and graphitization, machining, which is released in electric arc furnace in the form of arc conductor of electricity to heat melting furnace charge, according to its quality index, can be divided into ordinary power, high power and ultra high power graphite electrode, high power and ultra high power graphite electrode after multiple impregnation and roasting, decrease porosity, lower resistivity, graphite electrode at present because of the limitation of molding machine its diameter less than 1000 mm, the domestic common Φ 500 mm, generally used for blast furnace steelmaking,
And the price is high, graphite electrode according to the number of times of roasting and impregnation, the price is also different.
Carbon electrodes are electrically calcined anthracite coal, petroleum coke, graphite, coal tar, etc as main raw materials, ingredients, shaping, roasting, mechanical processing of carbon conductive material, it is the 21st century in our country gradually promote the use of a new type of energy conservation and environmental protection material, as a conductive pole -arc furnace has been widely used in industrial silicon, silicon metal smelting process.
In the same capacity of submerged arc furnace, compared with graphite electrode, the diameter of carbon electrode can be made larger (currently the largest domestic production 1400mm of carbon electrode, graphite electrode is generally less than 1000mm), make the furnace arc belt wider, arc stability, ensure hot melt efficiency, increase product output, reduce product power consumption.
According to the quality and size, carbon electrode per ton price is also different.
Self baking electrode in the anthracite coal, the pole, graphite, petroleum coke and pitch as the main raw material, the preparation into the ingredients, kneading, molding electrode paste products, put the electrode paste into has been installed in the electrode on the -arc furnace tube, in the process of ore heat furnace production depending on the current by the joule heat and heat conduction and radiation heat within the furnace and coking burning itself form an electrode.
The self - baking electrode can be used continuously.
Self-baking electrode process is relatively simple, production cycle is short, but the control of raw materials and ingredients formula and technical indicators, such as demanding, self baking electrode according to the electrode tube can do 2000 mm diameter, greatly increased broadband arc belt, stable arc, ensure the hot melt efficiency, expand the volume of molten pool, increase the product yield, as an important raw material of self baking electrode electrode paste has been widely used in calcium carbide, iron alloy, such as yellow phosphorus production use of all kinds of ore heat furnace.
