The graphite electrodes consumption is one of the most important costs in financial melt shop management. This cost should be optimized and reduced.
The electrodes consumption is composed of:
MISANO Engineering applies and anti-oxidation treatment to the electrodes. With the usage of an autoclave, we perform an impregnation of the graphite electrodes with a solution made of aluminium particles, developed in cooperation with the laboratories of SHINTO Japan (POWER-3T).
The parameters that determine the infiltration rate in the material are:
Electrodes are loaded into the treatment tank before the vacuum is created through the action of a mechanical pump;
The anti-oxidation liquid flows from the storage tank to the treatment tank according to the required program parameters;
The liquid is sucked in the storage tank and the electrodes are extracted and then dried inside a gas furnace;
The new system uses a liquid with a higher concentration of anti-oxidation components (POWER-3H) and allows to modify the temperature of the anti-oxidation liquid, that is another parameter that improves the infiltration rate.
Increasing the temperature of the liquid improves the original physical properties such as viscosity, to increase the penetration into the electrodes.
"Warm liquid" and "high concentration" are the main features of the new generation treatment:
After the electrodes drying phase, the anti-oxidation particles are strongly bonded to the graphite domains. This condition concurs to fight the natural effect of oxidation and delays its occurrence.
MISANO performs the ULTRA-3H treatment on electrodes with all the diameters, for EAF and LF applications, for the qualities HP, SHP and UHP.
Moreover, thanks to the customization of the treatment recipes, we guarantee a uniform absorption constant among all electrode qualities.
The treatment ULTRA – 3H doesn’t change the electro-physical properties of the electrodes and doesn’t leave any residues on the current contact pads.
At the end of the treatment, we register an increase of the density around 1% and a decreasing of the resistivity around 0,3-0,6%.
The aluminium particles are volatile and don’t impact the chemical composition of the steel.
The thermal expansion, the flexural strength, the compressive and tensile strength of the electrodes remain unchanged.
The anti-oxidation treatment ULTRA–3H is available in the facilities of Italy, United Arab Emirates and China.