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Electrical steel plasma stable suspension device and preparation method thereof

A suspension device, electrical steel technology, applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve problems such as surface damage of annealed steel strips, achieve high grades, reduce damage or nodules, and excellent surface quality.

Active Publication Date: 2015-09-02
MAGANG (GROUP) HOLDING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Since the annealing of high-silicon electrical steel needs to go through high humidity and high temperature environment, the surface of the steel is oxidized, and then reduced under high hydrogen atmosphere and high temperature conditions, the steel surface is very soft, and it is very easy to adhere to carbon under high temperature and self-weight conditions. The surface of the back-up roll made of material (graphite) or ceramics severely damages the surface of the annealed steel strip

Method used

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  • Electrical steel plasma stable suspension device and preparation method thereof
  • Electrical steel plasma stable suspension device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see figure 1 , an electrical steel plasma stabilized suspension device, has:

[0038] Airflow slowing device, which is connected on the furnace floor 6 in the furnace, the upper end surface of the airflow slowing device is provided with a gas outlet, and the upper end surface is used as a supporting surface for electrical steel;

[0039] The plasma cabinet 1 has a cavity 11 inside, and the plasma cabinet 1 is provided with an opening communicating with the cavity 11, and the opening communicates with the airflow slowing device;

[0040] Electrode rod 2, which extends into the cavity 11 of the plasma cabinet 1;

[0041] The power supply device includes a power supply 5, the power supply 5 connects the electrode rod 2 and the plasma cabinet 1 through a circuit, the plasma cabinet 1 is made of conductive material, and the electrode rod 2 and the plasma cabinet 1 form a discharge electrode;

[0042] Air intake device, which feeds gas into the cavity 11 of the plasma cabin...

Embodiment 2

[0054] see figure 2 , an electrical steel plasma stabilized suspension device,

[0055]1. The high-temperature plasma suspension device is divided into two parts, with the bottom of the annealing furnace as the dividing line: 1) the plasma generating device located outside the furnace; 2) the airflow slowing device that supports the steel strip in the furnace, located inside the furnace, The middle part of the lower part of the steel strip.

[0056] 2. The gas enters from the gas inlet, where the gas can be hydrogen, nitrogen, argon, etc. The plasma is connected to an external power source 5 by means of the electrodes, and the power source 5 powers the arc discharge of a pair of electrodes forming the plasma and the electrode rod 2 inside. The arc discharge makes the temperature of the gas rise rapidly and the volume expands hugely, forming a high-speed airflow into the airflow slowing device of the second part. Most of the plasma forming body is electrically insulating, a...

Embodiment 3

[0060] A method for manufacturing the above-mentioned electrical steel plasma stabilized suspension device, comprising the following steps:

[0061] 1) Punch a hole in furnace bottom plate 6;

[0062] 2) The airflow slowing device is installed on the furnace inner side of the furnace bottom plate 6, and the airflow slowing device corresponds to the position of the hole on the furnace bottom plate 6;

[0063] 3) connecting the opening of the plasma with the hole of the furnace floor 6;

[0064] 4) The electrode rod 2 extends into the cavity 11 through the plasma;

[0065] 5) Connect the power supply 5 to the plasma cabinet and the electrode rod 2 through wires.

[0066] The purpose of this device is to form a large gas flow to form a sufficient supporting force for the steel strip, and the range of gas temperature increase is not the primary consideration. Therefore, the diameter of the electrode rod 2 is large, the area of ​​the electrode rod 2 to the upper cavity 11 and th...

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Abstract

The invention discloses an electrical steel plasma stable suspension device and a preparation method thereof. An electrical heating chamber is arranged. A gaseous medium is heated under strong current in the electrical heating chamber, and the gas temperature is increased to form plasma airflow; the volume of current plasma gas expands a plurality of times than the volume at room temperature; the gas with expanded volume is sprayed out on a running steel strip through a plasma cabinet and a gas retarding device to form a steel strip support, so that the surface damage of an annealing steel strip is avoided or decreased.

Description

technical field [0001] The invention belongs to the technical field of electrical steel processing equipment, and in particular relates to a plasma stable suspension device for electrical steel and a manufacturing method thereof. Background technique [0002] The large-scale continuous production of cold-rolled high-grade electrical steel is realized by increasing the Si and Al content of the steel, reducing the impurity elements of the steel, reasonable hot rolling and providing continuous annealing (high temperature). The higher the grade of high-grade electrical steel, the lower the iron loss. Iron loss reduction, cold rolling annealing temperature increase is an essential means. [0003] The annealing of cold-rolled non-oriented electrical steel is realized in a continuous annealing furnace. The function of the continuous annealing furnace can realize the removal of excess carbon from the steel and the high annealing temperature to achieve the required recrystallizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C21D9/63
Inventor 裴陈新裴英豪王立涛施立发
Owner MAGANG (GROUP) HOLDING CO LTD
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