Many of us got to know steel. We use it within your everyday routine. But have you noticed the way to produce it? As well as what should it choose to use produce it? Simply the steel is made in the big factory which is cooked in the giant stove called furnace. As well as the cooking itself takes a lot of ingredients inside.
The Blast Furnace and Electric Arc Furnace methods will be the two major methods for producing iron and steel products. Scrap melting will be the major process utilizing Electric Arc Furnaces. Recently, industry competition has grown to be increasingly intense, elevating the requirement of a lot more efficient melting process. Capacities in the transformers are receiving larger and electric furnaces are increasing larger worldwide. Within this manufacturing environment, graphite materials which may have durability for larger-power operation are required considerably more for your use as Graphite Electrode (GE).
GE are produced from carbon. Carbon is really a nonmetal element with an atomic variety of 6 along with the atomic symbol “C”. Carbon could be the base of organic chemistry, closely in connection with organic matter and life activity. Manufacturing excellent graphite electrodes requires quality materials that are strictly selected.
Graphite has a higher heat transfer rating, effectiveness against higher temperatures, and it has more strength against thermal shock than other materials. Moreover, it excels in machinability to fulfill what’s needed for any broader range of dimensions. Thus, graphite may be the optimum material for scrap-melting electrodes.
GE can be consumed at high temperatures due to the reaction with oxygen for 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, utilization of quality GE ends in contributions to saving energy and environmental conservation. Electric arc furnaces, using the main objective of recycling steel scraps, boost reuse of steel products.
Production organization of graphite electrodes might be divided as 10 stages the next:
Raw material transporting
Kneading
Extruding
Baking
Pitch Impregnation
Re-Baking
Graphitization
Machining
Inspection
Shipment
The typical sizes for graphite electrodes are from diameter 10″ (inch) to 30″(inch) and from length 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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