Many of us must know steel. It’s used by us in your everyday routine. But have you noticed how you can produce it? And what can it decide to use produce it? Basically the steel is produced within a big factory which is cooked in a giant stove called furnace. And also the cooking itself takes numerous ingredients inside it.
The Blast Furnace and Electric Arc Furnace methods will be the two major processes 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 need for a lot more efficient melting process. Capacities from the transformers are becoming larger and electric furnaces are increasing larger worldwide. Within this manufacturing environment, graphite materials that have durability for larger-power operation are required much more for your use as Graphite Electrode (GE).
GE are made of carbon. Carbon is really a nonmetal element with the atomic variety of 6 and the atomic symbol “C”. Carbon may 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 carries a higher heat transfer rating, effectiveness against higher temperatures, and possesses more strength against thermal shock than other materials. Moreover, it excels in machinability in order to meet the requirements for the broader variety of dimensions. Thus, graphite will be the optimum material for scrap-melting electrodes.
GE are often consumed at high temperatures as a result of reaction with oxygen for being CO, CO2. The oxidation of electrodes starts at 500oC and accelerates its speed at 800oC (inside furnace). Consumption of graphite electrodes by sublimation occurs at 3400o. The rate of sublimation is proportional on the increase of current density.
Meanwhile, using quality GE ends in contributions to saving energy and environmental conservation. Electric arc furnaces, together with the main function 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 standard sizes for graphite electrodes originate from diameter 10″ (inch) to 30″(inch) and from duration 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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