Many of us need to know steel. We use it within your everyday life. But ever wondered how you can~the way to~tips on how to~the best way to~ways to produce it? And just what does it choose to use produce it? Fundamentally the steel is made within a big factory and it’s also cooked in the giant stove called furnace. And also the cooking itself takes so many ingredients in it.
The Blast Furnace and Electric Arc Furnace methods will be the two major methods for producing iron and steel products. Scrap melting could be the major process utilizing Electric Arc Furnaces. Recently, industry competition has grown to be increasingly intense, elevating the requirement for a much more efficient melting process. Capacities from the transformers are getting larger and electric furnaces are increasing larger worldwide. With this manufacturing environment, graphite materials which may have durability for larger-power operation are expected considerably more for your use as Graphite Electrode (GE).
GE are produced from carbon. Carbon is often a nonmetal element by having an atomic amount of 6 and the atomic symbol “C”. Carbon may be the base of organic chemistry, closely related to organic matter and life activity. Manufacturing excellent graphite electrodes requires quality materials which might be strictly selected.
Graphite carries a higher heat transfer rating, capacity higher temperatures, and has more strength against thermal shock than many other materials. Moreover, it excels in machinability to satisfy certain requirements for the broader array of dimensions. Thus, graphite may be the optimum material for scrap-melting electrodes.
GE are typically 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 (within the furnace). Utilization of graphite electrodes by sublimation occurs at 3400o. The velocity of sublimation is proportional towards the increase of current density.
Meanwhile, utilization of quality GE ends in contributions to saving energy and environmental conservation. Electric arc furnaces, with the main objective of recycling steel scraps, boost reuse of steel products.
Production organization of graphite electrodes might be divided as 10 stages as follows:
Raw material transporting
Kneading
Extruding
Baking
Pitch Impregnation
Re-Baking
Graphitization
Machining
Inspection
Shipment
The common sizes for graphite electrodes are from diameter 10″ (inch) to 30″(inch) and from length of 60″(inch) to 110″(inch). The weights are starting from 123 Kgs (10″ x 60″) to 2060 Kgs (30″ x 110″).
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