Method of continuously smelting a solid material rich in iron metal in an electric arc furnace专利检索-三相电流电路专利检索查询-专利查询网

Method of continuously smelting a solid material rich in iron metal in an electric arc furnace

阅读：963发布：2023-07-21

专利汇可以提供Method of continuously smelting a solid material rich in iron metal in an electric arc furnace专利检索，专利查询，专利分析的服务。并且Iron metal is continuously smelted in an electric arc furnace having three electrodes energized with three-phase current. Solid material rich in iron metal is continuously fed into a zone of the furnace hearth proximate two electrodes generating long and strongly radiating arcs and molten metal is continuously discharged in a zone of the hearth proximate the third electrode generating a short arc of limited radiation. This method is useful for continuously processing scrap-iron or pre-reduced solid material in the continuous production of steel.，下面是Method of continuously smelting a solid material rich in iron metal in an electric arc furnace专利的具体信息内容。

权利要求

1. A METHOD OF CONTINUOSULY PROCESS A SOLID MATERIAL RICH IN IRON METAL IN AN ELECTRIC ARC FURNACE HAVING THREE ELECTRODES ENERGIZED WITH THREE-PHASE CURRENT, COMPRISING THE STEPS OF

1. FORMING AN INCIPIENT BATH OF THE MOLTEN METAL IN THE FURNACE,

2. CONTROLLING AT LEAST ONE OF THE CHARACTERISTICS OF THE ELECTRIC CURRENT ENERGIZYING THE ELECTRODES TO PRODUCE A. A FIRST VOLTAGE DROP OF RELATIVELY HIGH VALUE BETWEEN TWO OF THE ELECTRODES AND THE BATH, THIS FIRST VOLTAGE DROP ESTABLISHING LING AND STRONGLY RADIATING ARCS ACROSS THE ELECTRODES AND THE BATH, AND B. A SECOND VOLTAGE DROP OF SUBSTANTIALLY LOWER VALUE THAN THE VALUE OF THE FIRST VOLTAGE DROP BETWEEN THE THIRD ELECTRODE AND THE BATH, THIS SECOND VOLTAGE DROP ESTABLISHING A SHORT ARC OF LIMITED RADIATION ACROSS THE THIRD ELECTRODE AND THE BATH.

2. The method of claim 1, wherein the electric current intensity is the characteristic controlled to produce said voltage drops, the total voltage drop per phase, current supply circuit and arc included, being the same for all three phases of the energizing current.

2. controlling at least one of the characteristics of the electric current energizing the electrodes to produce a. a first voltage drop of relatively high value between two of the electrodes and the bath, this first voltage drop establishing long and strongly radiating arcs across the electrodes and the bath, and b. a second voltage drop of substantially lower value than the value of the first voltage drop between the third electrode and the bath, this second voltage drop establishing a short arc of limited radiation across the third electrode and the bath,

3. feeding the solid material substantially continuously into a zone of the furnace proximate the two electrodes establishing the long and strongly radiation arcs to melt the iron metal, and

3. The method of claim 1, wherein the electric current intensity is the characteristic controlled to produce said voltage drops, the total voltage drop for at least one of the phases, current supply circuit and arc included, being different from that for the two other phases, current supply circuit and arc included.

3. FEEDING THE SOLID MATERIAL SUBSTANTIALLY CONTINUOUSLY INTO A ZONE OF THE FURNACE PROXIMATE THE TWO ELECTRODES ESTABLISHING THE LING AND STRONGLY RADIATION ARCS TO MELT THE IRON METAL, AND

4. CONTINUOSULY DISCHARGING THE MOLTEN IN A ZONE OF THE FURNACE PROXIMATE THE THIRD ELECTRODE ESTABLISHING THE SHORT ARC OF LIMITED RADIATION.

4. The method of claim 1, wherein an excess of the solid material is maintained permanently in contact with the molten metal in the furnace zone proximate the two electrodes establishing the long and strongly radiating arcs.

4. continuously discharging the molten metal in a zone of the furnace proximate the third electrode establishing the short arc of limited radiation.

5. The method of claim 1, wherein the capacity of the energizing current for the third electrode is increased to increase the power factor in the corresponding phase.

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Method of continuously smelting a solid material rich in iron metal in an electric arc furnace

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