RU2012149020A

RU2012149020A - METHOD FOR MAINTAINING THE INITIAL PERIOD OF ELECTRIC Smelting in a constant current arc furnace

Info

Publication number: RU2012149020A
Application number: RU2012149020/02A
Authority: RU
Inventors: Владимир Сергеевич Малиновский
Original assignee: Владимир Сергеевич Малиновский
Priority date: 2012-11-19
Filing date: 2012-11-19
Publication date: 2014-05-27
Also published as: RU2523381C2

Abstract

Способ ведения начального периода электроплавки в дуговой печи постоянного тока, включающий в себя загрузку печи шихтой, включение источника электропитания печи, опускание графитированного электрода до возникновения электрического контакта между электродом и шихтой, поджиг дуги, пропускание тока через замкнутую электрическую цепь, включающую графитированный электрод, междуговой промежуток, шихту, по крайней мере, один подовый электрод с токоподводами, источник электропитания, а также управление током, напряжением дуги и источника электропитания, контроль и стабилизацию максимально возможного напряжения на выводах источника питания и на дуге путем изменения ее длины после достижения на ней максимального напряжения, и завершение способа после окончания проплавления колодца в шихте, отличающийся тем, что на протяжении всего начального периода устанавливают величину плотности тока в графитированном электроде не более 20А/смвплоть до окончания проплавления колодца в шихте, которое определяют после прекращения стабилизации максимально возможного напряжения на дуге при перемещении рабочего торца электрода в глубь колодца.A method of maintaining the initial period of electric melting in a direct current arc furnace, which includes loading the furnace with a charge, turning on the furnace power supply, lowering the graphite electrode until electrical contact between the electrode and the charge occurs, igniting the arc, passing current through a closed electric circuit including a graphite electrode, between gap, charge, at least one hearth electrode with current leads, power supply, and also control current, arc voltage and power source power supply, monitoring and stabilization of the maximum possible voltage at the terminals of the power source and on the arc by changing its length after reaching the maximum voltage on it, and completion of the method after the penetration of the well in the charge, characterized in that throughout the initial period the current density is set to graphitized electrode no more than 20A / cm up to the end of penetration of the well in the charge, which is determined after the stabilization ceases to the maximum possible voltage on the arc When moving the working end of the electrode into the interior of the well.

Claims

A method of maintaining the initial period of electric melting in a direct current arc furnace, which includes loading the furnace with a charge, turning on the furnace power supply, lowering the graphite electrode until electrical contact between the electrode and the charge occurs, igniting the arc, passing current through a closed electric circuit including a graphite electrode, between gap, charge, at least one hearth electrode with current leads, power supply, and also control current, arc voltage and power source power supply, monitoring and stabilization of the maximum possible voltage at the terminals of the power source and on the arc by changing its length after reaching the maximum voltage on it, and completion of the method after the penetration of the well in the charge, characterized in that throughout the initial period the current density is set to Graphite electrodes are not more than 20A / cm ² until the closure of penetration in the charge well, which is determined after termination of stabilizing the maximum possible voltage across the arc when moving the working end of the electrode into the interior of the well.