CN-121977364-A - Automatic smelting control system and method for high-carbon ferromanganese electric furnace

CN121977364ACN 121977364 ACN121977364 ACN 121977364ACN-121977364-A

Abstract

The invention discloses an automatic smelting control system and method of a high-carbon ferromanganese electric furnace, wherein the system comprises a data acquisition module, a central processing module and an electrode voltage discharge management unit, wherein the data acquisition module is used for continuously acquiring three-phase electric parameters, a transformer gear signal and an electrode mechanical position, the central processing module comprises an electrode lifting control unit which is used for calculating and outputting three-phase electrode lifting control instructions with the aim of leveling the three-phase electric parameters, the transformer gear control unit is used for calculating and outputting a transformer gear adjustment instruction when one-phase primary current cannot be controlled within an allowable range through the electrode lifting control unit or when one-phase primary current is detected to exceed, so that the corresponding primary current is regulated, and the electrode voltage discharge management unit is used for dynamically calculating and executing a differential voltage discharge strategy according to the real-time mechanical position of each phase electrode, so that an electrode working end is maintained in a preset working interval. The invention can realize the dynamic balance of the three-phase electrical parameters and the electrode positions, thereby improving the smelting efficiency, reducing the energy consumption and reducing the electrode accidents.

Inventors

LIANG CHUNYANG
RAO LONGBIAO
ZHU MEIDONG
XIA ZHIXIONG
ZHOU XIANGFEI
ZHOU LI
CHEN LIANG

Assignees

五矿（湖南）铁合金有限责任公司
成都瑞嘉和科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260129

Claims (10)

1. An automatic smelting control system of a high-carbon ferromanganese electric furnace is characterized by comprising: the data acquisition module is used for continuously acquiring three-phase electric parameters, a transformer gear signal and an electrode mechanical position; the central processing module is electrically connected with the data acquisition module and comprises an electrode lifting control unit, a transformer gear control unit and an electrode voltage discharge management unit; the electrode lifting control unit is used for calculating and outputting a three-phase electrode lifting control instruction by taking the three-phase leveling electrical parameter as a target; The transformer gear control unit is used for calculating and outputting a transformer gear adjustment instruction when the electrode lifting control unit cannot control the primary current of a certain phase within an allowable range or detects that the primary current of a certain phase is out of limit so as to return the corresponding primary current to the allowable range; The electrode pressure discharge management unit is used for dynamically calculating and executing a differential pressure discharge strategy according to the real-time mechanical position of each phase of electrode, so that the working end of the electrode is maintained in a preset working interval.
2. The automatic smelting control system of the high-carbon ferromanganese electric furnace according to claim 1, wherein when the differentiated voltage discharge strategy is dynamically calculated and executed according to the real-time mechanical position of each phase electrode, the voltage discharge frequency of the corresponding electrode is adjusted according to the real-time mechanical position of each phase electrode, and the voltage discharge frequency of the corresponding electrode is gradually reduced from a preset lower limit to a preset upper limit based on the mechanical position of the electrode.
3. The automated smelting control system of a high carbon ferromanganese electric furnace according to claim 1, wherein the central processing module further comprises: And the protection logic unit is used for forcibly executing a preset lifting time after the electrode is pressed and released, prohibiting the lifting operation to the corresponding electrode in the preset lifting time, and executing the descending-before-lifting anti-collapse logic when the electrode is required to be lifted.
4. The automated smelting control system of a high carbon ferromanganese electric furnace according to claim 1, wherein the central processing module further comprises: And the tapping process control unit is used for controlling the electric limiting speed and the depth above the tapping hole and executing synchronous inserting control on the other two-phase electrodes during tapping.
5. The automated smelting control system of a high-carbon ferromanganese electric furnace according to claim 4, wherein the electrode above the furnace outlet has a plugging speed and a plugging depth of 65% -75% of the plugging speed and the plugging depth of the other two-phase electrode.
6. The automatic smelting control method of the high-carbon ferromanganese electric furnace is characterized by comprising the following steps of: Continuously acquiring three-phase electric parameters, a transformer gear signal and an electrode mechanical position; Electric parameter balance control, namely lifting and controlling the three-phase electrode by taking the leveling three-phase electric parameter as a target; If the primary current of a certain phase cannot be controlled within an allowable range through electric parameter balance control or the primary current of a certain phase is detected to be out of limit, starting a transformer to shift so as to return the corresponding primary current to the allowable range; and (3) intelligent maintenance of the electrode position, namely dynamically calculating and executing a differential voltage discharge strategy according to the real-time mechanical position of each phase of electrode, so that the working end of the electrode is maintained in a preset working interval.
7. The method according to claim 6, wherein when the differential voltage discharge strategy is dynamically calculated and executed according to the real-time mechanical position of each phase electrode, the voltage discharge frequency of the corresponding electrode is adjusted according to the real-time mechanical position of each phase electrode, and the voltage discharge frequency of the corresponding electrode is gradually reduced from a preset lower limit to a preset upper limit based on the mechanical position of the electrode.
8. The method of automatic smelting control system for high-carbon ferromanganese electric furnace according to claim 6, further comprising: and executing safety protection logic, namely executing a preset lifting protection time after the electrode is pressed and released, prohibiting lifting operation to the corresponding electrode in the preset lifting protection time, and executing descending-then-lifting anti-collapse logic when the electrode is required to be lifted.
9. The method of automatic smelting control system for high-carbon ferromanganese electric furnace according to claim 6, further comprising: And (3) discharging process control, namely, during discharging, performing synchronous downward insertion control on the other two-phase electrodes by controlling the electric limiting speed and the depth above the discharging hole.
10. The method for automatically smelting and controlling the system for the high-carbon ferromanganese electric furnace according to claim 9, wherein the inserting speed and the inserting depth of the electrode above the furnace outlet are 65% -75% of the inserting speed and the inserting depth of the other two-phase electrode.

Description

Automatic smelting control system and method for high-carbon ferromanganese electric furnace Technical Field The invention relates to the technical field of ferroalloy smelting, in particular to an automatic smelting control system and method for a high-carbon ferromanganese electric furnace. Background The core of the ore-smelting furnace is to convert electric energy into heat energy through a three-phase electrode, melt furnace burden and complete reduction reaction. Traditional smelting control mainly relies on manual experience, and the stable furnace condition is maintained through manual operation of electrode lifting, transformer gear and electrode pressure release. This control has the following significant drawbacks: The response lag and the precision are poor, and the manual judgment and operation can not accurately respond to the electric and thermal conditions of instantaneous change in the furnace in real time, so that three-phase power unbalance, large current fluctuation, high energy consumption and frequent electrode accidents are caused. The electrode lifting, the transformer gear shifting, the electrode pressure releasing and the tapping operation are usually isolated, and a system integrated for collaborative decision is lacked, so that the global optimal control is difficult to realize. The specific process risk is insufficient, the high-carbon ferromanganese smelting has the characteristic of serious material collapse, and the traditional method lacks an effective material collapse prevention strategy during key operations such as tapping, electrode lifting and the like, so that the production safety and the smooth operation are affected. The electrode management is rough, namely the electrode pressure discharge interval is fixed, so that the electrode position is easily in a limit position for a long time, and the arc stability and the distribution of a reaction zone in the furnace are affected. Therefore, an automatic smelting control scheme which can realize fine, intelligent and synergistic control and is optimized particularly for the process characteristics of high-carbon ferromanganese is urgently needed. Disclosure of Invention Aiming at the defects in the prior art, the invention provides an automatic smelting control system and method for a high-carbon ferromanganese electric furnace, which realize the dynamic balance of three-phase electric parameters and electrode positions through multivariate cooperative control and maintain the stability of total power factor, thereby improving smelting efficiency, reducing energy consumption, reducing electrode accidents and ensuring safe and smooth production. In a first aspect, an automatic smelting control system for a high-carbon ferromanganese electric furnace is provided, comprising: the data acquisition module is used for continuously acquiring three-phase electric parameters, a transformer gear signal and an electrode mechanical position; the central processing module is electrically connected with the data acquisition module and comprises an electrode lifting control unit, a transformer gear control unit and an electrode voltage discharge management unit; the electrode lifting control unit is used for calculating and outputting a three-phase electrode lifting control instruction by taking the three-phase leveling electrical parameter as a target; The transformer gear control unit is used for calculating and outputting a transformer gear adjustment instruction when the electrode lifting control unit cannot control the primary current of a certain phase within an allowable range or detects that the primary current of a certain phase is out of limit so as to return the corresponding primary current to the allowable range; The electrode pressure discharge management unit is used for dynamically calculating and executing a differential pressure discharge strategy according to the real-time mechanical position of each phase of electrode, so that the working end of the electrode is maintained in a preset working interval. Further, when the differential pressure discharge strategy is dynamically calculated and executed according to the real-time mechanical position of each phase electrode, the pressure discharge frequency of the corresponding electrode is adjusted according to the real-time mechanical position of each phase electrode, and the pressure discharge frequency of the corresponding electrode is gradually reduced from the preset lower limit to the preset upper limit based on the mechanical position of the electrode. Further, the central processing module further includes: And the protection logic unit is used for forcibly executing a preset lifting time after the electrode is pressed and released, prohibiting the lifting operation to the corresponding electrode in the preset lifting time, and executing the descending-before-lifting anti-collapse logic when the electrode is required to be lifted. Further, the central processing