Many of us have to know steel. We employ it inside your everyday life. But ever thought about the way to produce it? Along with what will it decide to try produce it? Simply the steel is produced in the big factory and it is cooked inside a giant stove called furnace. Along with the cooking itself takes countless ingredients within it.
The Blast Furnace and Electric Arc Furnace methods would be the two major processes for producing iron and steel products. Scrap melting is the major process utilizing Electric Arc Furnaces. Recently, industry competition is now increasingly intense, elevating the requirement of an infinitely more efficient melting process. Capacities of the transformers increasingly becoming larger and electric furnaces are growing larger worldwide. Within this manufacturing environment, graphite materials which have durability for larger-power operation are needed much more for your use as Graphite Electrode (GE).
GE are produced from carbon. Carbon is often a nonmetal element with the atomic variety of 6 as well as the atomic symbol “C”. Carbon may be the base of organic chemistry, closely associated with organic matter and life activity. Manufacturing excellent graphite electrodes requires quality materials which are strictly selected.
Graphite carries a higher heat transfer rating, capacity higher temperatures, and contains more strength against thermal shock than other materials. Moreover, it excels in machinability to satisfy the requirements for the broader array of dimensions. Thus, graphite could be the optimum material for scrap-melting electrodes.
GE are typically consumed at high temperatures due to reaction with oxygen to become 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 rate of sublimation is proportional on the increase of current density.
Meanwhile, usage of quality GE leads to contributions to saving energy and environmental conservation. Electric arc furnaces, together with the main objective of recycling steel scraps, help promote reuse of steel products.
Production organization of graphite electrodes can 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 including 123 Kgs (10″ x 60″) to 2060 Kgs (30″ x 110″).
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