Many of us must know steel. We employ it inside your everyday life. But have you ever wondered how you can~the way to~tips on how to~the best way to~ways to produce it? Along with what can it decide to use produce it? This is the steel is produced inside a big factory and it is cooked within a giant stove called furnace. Along with the cooking itself takes so many ingredients inside.
The Blast Furnace and Electric Arc Furnace methods would be the two major approaches for producing iron and steel products. Scrap melting will be the major process utilizing Electric Arc Furnaces. Recently, industry competition is becoming increasingly intense, elevating the requirement of a lot more efficient melting process. Capacities with the transformers are becoming larger and electric furnaces are growing larger worldwide. Within this manufacturing environment, graphite materials which have durability for larger-power operation are required far more for that use as Graphite Electrode (GE).
GE are manufactured from carbon. Carbon is a nonmetal element with the atomic amount of 6 along with 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 has a higher heat transfer rating, potential to deal with higher temperatures, and possesses more strength against thermal shock than many other materials. Moreover, it excels in machinability in order to meet certain requirements for the broader array of dimensions. Thus, graphite is 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 (within the furnace). Consumption of graphite electrodes by sublimation occurs at 3400o. The velocity of sublimation is proportional for the increase of current density.
Meanwhile, using quality GE brings about contributions to saving energy and environmental conservation. Electric arc furnaces, with all the main purpose of recycling steel scraps, market 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 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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