Many of us must know steel. It’s used by us with your everyday life. But have you noticed the way to produce it? Along with what will it decide to use produce it? Simply the steel is made within a big factory which is cooked in a giant stove called furnace. And also the cooking itself takes countless ingredients inside.
The Blast Furnace and Electric Arc Furnace methods will be the two major techniques for producing iron and steel products. Scrap melting could be the major process utilizing Electric Arc Furnaces. Recently, industry competition is becoming increasingly intense, elevating the requirement of a much more efficient melting process. Capacities from the transformers are becoming larger and electric furnaces are increasing larger worldwide. In this manufacturing environment, graphite materials which have durability for larger-power operation are required much more for your use as Graphite Electrode (GE).
GE are made from carbon. Carbon is really a nonmetal element by having an atomic quantity of 6 as well as the atomic symbol “C”. Carbon is the base of organic chemistry, closely linked to organic matter and life activity. Manufacturing excellent graphite electrodes requires quality materials which are strictly selected.
Graphite features a higher heat transfer rating, resistance to higher temperatures, and it has more strength against thermal shock than many other materials. Moreover, it excels in machinability to meet the requirements for a broader array of dimensions. Thus, graphite will be the optimum material for scrap-melting electrodes.
GE can be consumed at high temperatures because of the reaction with oxygen to become CO, CO2. The oxidation of electrodes starts at 500oC and accelerates its speed at 800oC (inside furnace). Usage of graphite electrodes by sublimation occurs at 3400o. The velocity of sublimation is proportional on the increase of current density.
Meanwhile, using quality GE leads to contributions to saving energy and environmental conservation. Electric arc furnaces, using the main aim of recycling steel scraps, boost reuse of steel products.
Production organization of graphite electrodes may be divided as 10 stages the next:
Raw material transporting
Kneading
Extruding
Baking
Pitch Impregnation
Re-Baking
Graphitization
Machining
Inspection
Shipment
The conventional sizes for graphite electrodes come from diameter 10″ (inch) to 30″(inch) and from period of 60″(inch) to 110″(inch). The weights are including 123 Kgs (10″ x 60″) to 2060 Kgs (30″ x 110″).
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