Many of us need to know steel. It’s used by us in your everyday activity. But ever wondered how you can produce it? And what will it decide to try produce it? Simply the steel is produced inside a big factory and it’s also cooked inside a giant stove called furnace. And also the cooking itself takes a lot of ingredients inside it.
The Blast Furnace and Electric Arc Furnace methods would be the two major methods for producing iron and steel products. Scrap melting may be the major process utilizing Electric Arc Furnaces. Recently, industry competition has grown to be increasingly intense, elevating the necessity for a more efficient melting process. Capacities in the transformers are receiving larger and electric furnaces are increasing larger worldwide. On this manufacturing environment, graphite materials which may have durability for larger-power operation are required a lot more for your use as Graphite Electrode (GE).
GE are manufactured from carbon. Carbon is often a nonmetal element with an atomic variety of 6 as well as the atomic symbol “C”. Carbon will be 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, effectiveness against higher temperatures, and has more strength against thermal shock than other materials. Moreover, it excels in machinability to satisfy what’s needed for a broader selection of dimensions. Thus, graphite is the optimum material for scrap-melting electrodes.
GE are often 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 (in the furnace). Use of graphite electrodes by sublimation occurs at 3400o. The speed of sublimation is proportional on the increase of current density.
Meanwhile, utilization of quality GE results in contributions to saving energy and environmental conservation. Electric arc furnaces, with all the main aim of recycling steel scraps, 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 standard sizes for graphite electrodes are from diameter 10″ (inch) to 30″(inch) and from period of 60″(inch) to 110″(inch). The weights are which range from 123 Kgs (10″ x 60″) to 2060 Kgs (30″ x 110″).
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