All of us must know steel. We use it inside your everyday life. But ever thought about the way to produce it? And what should it decide to use produce it? Simply the steel is produced within a big factory which is cooked inside a giant stove called furnace. As well as the cooking itself takes numerous ingredients inside.
The Blast Furnace and Electric Arc Furnace methods would be the two major approaches for producing iron and steel products. Scrap melting may 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 in the transformers are receiving larger and electric furnaces are growing larger worldwide. In this manufacturing environment, graphite materials which have durability for larger-power operation are essential a lot more to the use as Graphite Electrode (GE).
GE are made of carbon. Carbon is often a nonmetal element with an atomic amount of 6 as well as the atomic symbol “C”. Carbon could be the base of organic chemistry, closely in connection with organic matter and life activity. Manufacturing excellent graphite electrodes requires quality materials that are strictly selected.
Graphite features a higher heat transfer rating, capacity higher temperatures, and it has more strength against thermal shock than other materials. Moreover, it excels in machinability in order to meet what’s needed for the broader array of dimensions. Thus, graphite could be the optimum material for scrap-melting electrodes.
GE are often consumed at high temperatures due to the reaction with oxygen being CO, CO2. The oxidation of electrodes starts at 500oC and accelerates its speed at 800oC (inside the furnace). Utilization of graphite electrodes by sublimation occurs at 3400o. The pace of sublimation is proportional towards the increase of current density.
Meanwhile, usage of quality GE brings about contributions to saving energy and environmental conservation. Electric arc furnaces, together with the main function of recycling steel scraps, boost reuse of steel products.
Production organization of graphite electrodes could be divided as 10 stages the following:
Raw material transporting
Kneading
Extruding
Baking
Pitch Impregnation
Re-Baking
Graphitization
Machining
Inspection
Shipment
The typical sizes for graphite electrodes are from diameter 10″ (inch) to 30″(inch) and from amount of 60″(inch) to 110″(inch). The weights are ranging from 123 Kgs (10″ x 60″) to 2060 Kgs (30″ x 110″).
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