Causes and preventive treatment of electrode hard breakage (II)

Electrode hard break refers to the sintered electrode in the conductive clip below the part of the fracture:

Electrode paste quality problems: electrode paste ash content is high, poor conductivity; volatile matter content is too low, poor adhesion, poor strength after melting and burning; electrode paste softening point is low or volatile matter content is high, the liquid paste column is too high (the liquid paste column should be in 1.0 ~ 2.0m), resulting in electrode paste delamination, the higher the ash content of the electrode paste, the higher the resistance of sintered resistance, the worse the electrical conductivity of the cross-section of the current is far more than the maximum current electrode to bear Maximum current, when the furnace overload greater than the current operation, the electrode will be over-burning bright and hard break: electrode paste volatile fraction content is too low (below 9%) electrode paste in the roasting process binder is too little, poor adhesion between the aggregate, poor strength, prone to hard break accidents; softening point is too low, the electrode paste in the sintering process will be paste columns are too high, resulting in layering of aggregates and binder, and produce a hard break: volatile fraction content is too high Volatile content is too high, the roasting of the electrode porosity, poor strength, also prone to electrode hard break accident.

China’s Sichuan Province, a calcium carbide plant 12500kVA open calcium carbide furnace, because of its three-phase electrode system does not seal the large set, conical ring copper tile completely exposed in the material surface above the electrode around the radiation temperature is high, the three-phase electrode sintering speed is very fast, and often over-burning of the electrode, the copper tile and the electrode contact is not good, and often hit the arc, up to the most time three furnaces in a year had to hit the bad copper tile more than 180 pieces. Later, the volatile content of the electrode paste to 16.5%, resulting in electrode paste aggregate and knotting agent layering, electrode pressure to the aggregate when the electrode is overcooked hard break, pressure to the binder on the flow of paste soft breaks, repeated vicious circle, out of a number of electrode accidents. Later, the shutdown of the equipment for the transformation of the three-phase electrodes are installed on all the water-cooled sealing sleeve, electrode paste volatile content from 16.5% down to 11.5%, after the transformation of the three furnaces three-phase electrodes have been transferred to normal production, there has been no electrode overcooking or copper watt playing the arc and burned out of the copper watt: there has been no electrode paste delamination, the emergence of hard breaks, flowing paste, soft breaks accident. The production is on the normal track, the output is greatly improved, and all kinds of consumption are greatly reduced.

In summary, the quality index of electrode directly affects the process demand of ferroalloy products, Tanlin electrode paste takes into account all the factors that may occur, in the production of products, timely modulation of the most compatible formula to make out more suitable for customer’s products. Choose Tanlin Electrode Paste, let us provide you with the best products and services.

China Tanlin Electrode Paste www.tanlincarbon.com summarizes all kinds of electrodes in the use of electrode paste in the process of the various problems that may arise, only to provide customers with the best quality service. The company is equipped with the most excellent technical team, the most advanced equipment, by first communicating with the customer’s technical parameters and then formulate a reasonable technical formula to produce the most suitable electrode paste products for the customer so as to win the market.