Graphite Electrode
In an electrochemical cell can be identified two electrodes the anode is being oxidized and the anode is reduced, when it comes to the anode polarized elements is the positive electrode and the cathode the negative electrode .. Graphite is a variety of coal, which forms three covalent bonds to 120 degrees, black and shiny metal used in the formation of electrodes because it is a semiconductor which increases their conductivity as temperature increases identified at room temperature conductivity low and the high temperature which melts what is’ immersed in the iron ore and scrap melt achieved without the destruction of the graphite electrode can be enriched with potassium to enhance its conductivity Usually graphite electrode are used in electric furnaces for pig iron processing and / or Scrap The process begins with the arrival of previously classified scrap the Aceria, here is inspected and then is cut or broken into more small pieces which are transported to the melting pot casting, after determining the amount to be fused proceeds to place two or three depending on the case and then using a high voltage transformer arcing occurs between the two electrodes which melts the scrap, at this time qualified personnel necessary to enter a probe to verify the composition of the laundry and if necessary proceed to the respective additives, it is necessary to emphasize that the use of blister is common to facilitate the separation of impurities by the readings of the probe passed the stage of refining.
Depending on the application, the casting becomes specific forming processes such as making billet or miscellaneous items produced by Rolling. Graphite electrodes are very fragile so its replacement is carried out very specific procedures assisted in some cases breaking them in the process involves great losses rather than their cost, by the time it takes to change seriously affecting the continuity of process. The transport of material takes place in the oven with the aid of special vehicles usually powered by electricity, the operators of these (picks) should be especially careful not to hurt the furnace when carbon (graphite) are very fragile as said replacement may delay the production significantly, it is usual to find scum removers vehicles also equipped with hydraulically commanded spoons. Currently there are several manufacturers of these items usually do via carbides in some cases using to increase their durability.
~Duane
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