A method and an arrangement measures electrode paste in an electrode column of an electric arc furnace. The electrode column has a steel casing, is provided with a contact shoe ring, and is filled with electrode paste introduced from above and evolving from raw paste in the upper part of the steel casing to melted paste and to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a laser beam transmitted by a first laser device. The level of the molten paste is determined with a laser beam transmitted by a second laser device. The data received from the laser devices is used for calculation of the distances of the levels of the raw paste and molten paste from the contact shoe ring.

A method and an arrangement measures electrode paste in an electrode column of an electric arc furnace. The electrode column has a steel casing, is provided with a contact shoe ring, and is filled with electrode paste introduced from above and evolving from raw paste in the upper part of the steel casing to melted paste and to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a laser beam transmitted by a first laser device. The level of the molten paste is determined with a laser beam transmitted by a second laser device. The data received from the laser devices is used for calculation of the distances of the levels of the raw paste and molten paste from the contact shoe ring.

The present invention relates to a self-calcining electrode material for electric arc furnaces, containing one or more carbon components and a binder, wherein the binder is hard bitumen and having a needle penetration at 25 C. according to DIN EN 1426 of <50 [per 0.1 mm] and/or a softening point (ring and ball) according to DIN EN 1 427 of at least 65 C. and/or having a density at 25 C. according to DIN EN 52004 of 0.5 to 2 g/cm3, wherein the electrode material has a PAH content of <500 ppm. The hard bitumen is preferably derived by flash distillation from soft and medium-hard bitumen types and has a high sulfur content.

The present invention relates to a self-calcining electrode material for electric arc furnaces, containing one or more carbon components and a binder, wherein the binder is hard bitumen and having a needle penetration at 25 C. according to DIN EN 1426 of <50 [per 0.1 mm] and/or a softening point (ring and ball) according to DIN EN 1 427 of at least 65 C. and/or having a density at 25 C. according to DIN EN 52004 of 0.5 to 2 g/cm3, wherein the electrode material has a PAH content of <500 ppm. The hard bitumen is preferably derived by flash distillation from soft and medium-hard bitumen types and has a high sulfur content.

Provided are a method and an arrangement for measurement of electrode paste in an electrode column of an electric arc furnace. The electrode column comprises a steel casing surrounding the electrode paste and said electrode column is provided with a contact shoe ring to conduct electric current to the electrode. The electrode column is filled with electrode paste. The electrode paste evolves through different phases, from raw paste in the upper part of the steel casing to melted paste and further to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a first laser device and the level of the molten paste is determined with a second laser device. The data received from the laser devices is used for calculation of the distances of the levels of the raw paste and molten paste from the contact shoe ring.

Provided are a method and an arrangement for measurement of electrode paste in an electrode column of an electric arc furnace. The electrode column comprises a steel casing surrounding the electrode paste and said electrode column is provided with a contact shoe ring to conduct electric current to the electrode. The electrode column is filled with electrode paste. The electrode paste evolves through different phases, from raw paste in the upper part of the steel casing to melted paste and further to baked paste in the lower part of the electrode column. The level of the raw paste is determined with a first laser device and the level of the molten paste is determined with a second laser device. The data received from the laser devices is used for calculation of the distances of the levels of the raw paste and molten paste from the contact shoe ring.

A self-baking electrode includes a cylindrical shroud having a longitudinal central axis A. The shroud is made of an electrically-conductive material and disposed vertically on top of a vat of the furnace over one length of the self-baking electrode. The electrode includes a central column disposed within the shroud, substantially aligned on the longitudinal axis A. The central column is suspended from a device independent of the shroud such that the central column is adapted to slip in vertical translation within the shroud and a crude carbonaceous paste disposed around the central column in a top portion of the shroud. The paste is softened and baked under an effect of heat into a stiff carbonaceous paste sticking to the central column in a bottom portion of the shroud. The central column includes a series of electrically-conductive carbonaceous elongate elements. The carbonaceous elongate elements are flexible.

A self-baking electrode includes a cylindrical shroud having a longitudinal central axis A. The shroud is made of an electrically-conductive material and disposed vertically on top of a vat of the furnace over one length of the self-baking electrode. The electrode includes a central column disposed within the shroud, substantially aligned on the longitudinal axis A. The central column is suspended from a device independent of the shroud such that the central column is adapted to slip in vertical translation within the shroud and a crude carbonaceous paste disposed around the central column in a top portion of the shroud. The paste is softened and baked under an effect of heat into a stiff carbonaceous paste sticking to the central column in a bottom portion of the shroud. The central column includes a series of electrically-conductive carbonaceous elongate elements. The carbonaceous elongate elements are flexible.

A carbon precursor material characterized by a flashpoint above 290 C. and a softening point between 110 and 300 C. Mettler is provided that includes petroleum-derived pitch product derived from a petroleum-based raw material having a concentration of less than 40% by weight of asphaltenes as measured by SARA analysis. The use of such carbon precursor material in in the production of graphite electrodes for electric arc furnaces used in steel/ferro-alloy/silicon production or in carbon electrodes for aluminum production and/or manufacture of graphite particles for the manufacturing of battery electrodes. A process for producing a coating and/or binding and/or impregnation carbon precursor material is also provided.

A carbon precursor material characterized by a flashpoint above 290 C. and a softening point between 110 and 300 C. Mettler is provided that includes petroleum-derived pitch product derived from a petroleum-based raw material having a concentration of less than 40% by weight of asphaltenes as measured by SARA analysis. The use of such carbon precursor material in in the production of graphite electrodes for electric arc furnaces used in steel/ferro-alloy/silicon production or in carbon electrodes for aluminum production and/or manufacture of graphite particles for the manufacturing of battery electrodes. A process for producing a coating and/or binding and/or impregnation carbon precursor material is also provided.