We all need to know steel. It’s used by us within your everyday routine. But have you ever wondered how you can~the way to~tips on how to~the best way to~ways to produce it? As well as what will it take to produce it? This is the steel is produced inside a big factory which is cooked in a giant stove called furnace. And the cooking itself takes so many ingredients within it.
The Blast Furnace and Electric Arc Furnace methods are the two major approaches for producing iron and steel products. Scrap melting will be the major process utilizing Electric Arc Furnaces. Recently, industry competition has become increasingly intense, elevating the necessity for an infinitely more efficient melting process. Capacities of the transformers are receiving larger and electric furnaces are growing larger worldwide. In this manufacturing environment, graphite materials who have durability for larger-power operation are expected considerably more for the use as Graphite Electrode (GE).
GE are made of carbon. Carbon is a nonmetal element with the atomic quantity of 6 as well as the atomic symbol “C”. Carbon is 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 features a higher heat transfer rating, resistance to higher temperatures, and has more strength against thermal shock than many other materials. Moreover, it excels in machinability to satisfy the needs to get a broader range of dimensions. Thus, graphite may be the optimum material for scrap-melting electrodes.
GE are typically consumed at high temperatures due to reaction with oxygen being CO, CO2. The oxidation of electrodes starts at 500oC and accelerates its speed at 800oC (inside the furnace). Consumption of graphite electrodes by sublimation occurs at 3400o. The speed of sublimation is proportional on the increase of current density.
Meanwhile, use of quality GE results in 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 might be divided as 10 stages the subsequent:
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 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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