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Device and application method for improving blowing rate of steel ladle bottom blowing air bricks

A technology of breathable bricks and ladles, applied in safety devices, casting melt containers, manufacturing tools, etc., can solve the problems of affecting the removal effect of inclusions, small flow, affecting the life of breathable bricks, etc.

Active Publication Date: 2020-10-16
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) When the ladle pouring is completed and the off-line treatment is completed, the permeable bricks are manually cleaned by burning oxygen. The time and effect of each treatment depend entirely on the experience of the operator. After the treatment, the permeable bricks still have different degrees of blockage and air leakage Phenomenon, the flow rate of the bottom blowing argon of the breathable brick is small in the early stage or the bottom blowing cannot be opened, which affects the removal effect of inclusions; the breathable brick is damaged by excessive oxygen burning, which seriously affects the life of the breathable brick

Method used

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  • Device and application method for improving blowing rate of steel ladle bottom blowing air bricks
  • Device and application method for improving blowing rate of steel ladle bottom blowing air bricks
  • Device and application method for improving blowing rate of steel ladle bottom blowing air bricks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A device for improving the blow-through rate of air-blowing bricks at the bottom of the ladle, such as Figure 1-3 As shown, it includes gas circuit control cabinet 1, electrical control cabinet 2, lighthouse 3, on-site large-screen display 5 and high-performance check valve 10, and the electrical control cabinet 2 is equipped with programmable logic controller PLC 6, touch screen 4 and switch The button 7 and the light tower 3 are set on the top of the electrical control cabinet 2, the on-site large-screen display 5 is set at the visible position of the ladle vent brick online processing station, and the gas circuit control cabinet 1 is equipped with a gas circuit control unit 8 and a gas source inlet. and gas outlet;

[0063] Described programmable logic controller PLC 6 comprises CPU, digital processing module, analog quantity processing module and communication module;

[0064] The programmable logic controller PLC 6 is connected to the gas circuit control unit 8, ...

Embodiment 2

[0105] As described in Example 1, a device and application method for improving the blow-through rate of the air-blowing brick at the bottom of the ladle, the difference is:

[0106] The present invention is used for a 100t electric furnace ladle, and two dispersed bottom-blowing air bricks are arranged in the ladle. The application method of the device for improving the blowing rate of the bottom-blowing air brick of the ladle comprises the following steps:

[0107] 1) Leakage check before initial use: Connect the gas source outlet of the gas circuit control cabinet 1 with the quick joint 24 on the air inlet pipeline of the breathable brick to be tested, operate the touch screen 4, open the "test calibration interface", and press "point to detect leaks". "Soft button, activate point leak detection function: the device outputs a small flow, and from the detection screen, you can see that the branch back pressure slowly rises above 5bar, and you can also see that the flow value ...

Embodiment 3

[0122] As described in Example 1, a device and application method for improving the blow-through rate of the air-blowing brick at the bottom of the ladle, the difference is:

[0123] The present invention is used for a 120t converter ladle argon blowing nozzle seat brick, a diffused ventilating nozzle seat brick, and the application method of the device for improving the blowing rate of the ladle bottom blowing ventilating brick comprises the following steps:

[0124] 1) Leakage check before initial use: Connect the gas source outlet of the gas circuit control cabinet 1 with the quick joint 24 on the air inlet pipeline of the breathable brick to be tested, operate the touch screen 4, open the "test calibration interface", and press "point to detect leaks". "Soft button, activate point leak detection function: the device outputs a small flow, and from the detection screen, you can see that the branch back pressure slowly rises above 5bar, and you can also see that the flow value...

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Abstract

The invention relates to a device and an application method for improving the blowing rate of steel ladle bottom blowing air bricks. The device comprises a gas circuit control cabinet, an electrical control cabinet, a lighthouse, an on-site big screen displayer and a high-performance check valve. A PLC (programmable logic controller), a touch screen and switch buttons are arranged inside the electrical control cabinet. The lighthouse is arranged at the top of the electrical control cabinet. The on-site big screen displayer is arranged at a visible position of a steel ladle air brick online treatment station. A gas circuit control unit, a gas source inlet and a gas source outlet are arranged inside the gas circuit control cabinet. The device has the functions of online automatically testingair permeability of the air bricks and conducting automatic purging, by applying the device, the problem that after argon blowing of the air bricks is finished, a pipeline forms negative pressure after a gas source is disconnected, and molten steel is sucked into an air channel is solved, 100% of recanalization rate of the air bricks is achieved, and the service life of the air bricks is prolonged.

Description

technical field [0001] The invention relates to a device and an application method for improving the blow-through rate of a ladle bottom-blowing air brick, and belongs to the technical field of steelmaking technology in iron and steel metallurgy. Background technique [0002] Ladle bottom argon blowing is a simple and efficient out-of-furnace refining technology, which can uniform the composition and temperature of molten steel, promote the physical and chemical reactions of molten steel refining and the floating of inclusions, and is widely used at home and abroad. The ventilation brick is the most critical functional element of the ladle bottom blowing. The blowing rate and air permeability of the ventilation brick are the technical keys to ensure the bottom blowing argon metallurgical effect and smooth implementation. [0003] In recent years, the technology of blowing argon throughout the ladle has been popularized and applied, but the existing technology has the followi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/58B22D46/00C21C7/072
CPCB22D41/58B22D46/00C21C7/072
Inventor 武光君朱建武文健王金龙
Owner LAIWU STEEL YINSHAN SECTION CO LTD