Steel ladle circumferential weld type ventilating water feeding opening seat block and argon blowing metallurgy method thereof

A technology for nozzle block and ladle, which is applied to metal processing equipment, casting molten material containers, manufacturing tools, etc., can solve the problems of large amount of molten steel pouring, purifying molten steel without removing inclusions, and large amount of pouring water. To achieve the effect of reducing the amount of molten steel pouring, promoting floating and removal, and inhibiting the problem of nodules

Pending Publication Date: 2019-05-07
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The cleanliness and castability of molten steel are the focus and difficulty of steelmaking process control. In continuous casting production, after the slag in the ladle flows into the tundish, it will cause the burning loss of easily oxidized alloy elements such as aluminum and titanium in the molten steel. , and produce alumina inclusions, affecting the cleanliness of molten steel, and easily causing steel surface quality problems
Generally, the ladle slag detection technology is used to reduce the amount of ladle slag, that is, the nozzle is closed and the pouring is stopped when the ladle slag is detected at the later stage of ladle pouring. However, the following problems are found in the actual production process: (1) The remaining amount of molten steel pouring in the ladle (2) Although it can reduce the amount of slag in the ladle to a certain extent, it does not have the metallurgical function of removing inclusions in molten steel and purifying molten steel
This patent has the following deficiencies: there is no air-permeable...

Method used

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  • Steel ladle circumferential weld type ventilating water feeding opening seat block and argon blowing metallurgy method thereof
  • Steel ladle circumferential weld type ventilating water feeding opening seat block and argon blowing metallurgy method thereof
  • Steel ladle circumferential weld type ventilating water feeding opening seat block and argon blowing metallurgy method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A ladle ring seam type breathable upper nozzle seat brick, such as Figure 1-Figure 3 As shown, it includes the ladle upper nozzle block body 1, the ring seam 2, the air chamber box 3, and the air intake pipe 4. The middle part of the ladle upper nozzle block body 1 is provided with a flow steel hole 5, a connecting hole 6, and an upper nozzle. Mounting hole 7, the upper surface of the upper nozzle block body 1 of the ladle is provided with a number of annular rings 2 from the upper surface of the upper nozzle block body to the inside of the nozzle block body, and the upper mouth of the ring seam is perpendicular to the upper surface of the nozzle block body. On the surface, the lower opening of the annular seam communicates with the annular air chamber box 3 provided at the bottom of the annular seam, and the side of the air chamber box is connected with an air inlet pipe 4, one end of the air inlet pipe communicates with the air chamber box, and the other end connects ...

Embodiment 2

[0060] As described in Example 1, the difference between the ladle annular seam type breathable upper nozzle seat brick is that:

[0061] The number of the annular seams 2 is 2, the annular seam width a is 1.7 mm, and the annular seam height h is 120 mm.

[0062] The air chamber box 3 is in the shape of a ring as a whole, the longitudinal section of the air chamber box is rectangular, the width x of the rectangle is 30mm, and the height y is 20mm.

[0063] Described flow steel hole 5 is circular truncated, and the upper port diameter d1 of circular truncated is 190mm, and the lower port diameter d2 is 140mm, and the height c of circular truncated is 55mm, and described connection hole is cylindrical channel, and the diameter of cylindrical channel and circular truncated The diameter of the lower port is the same, and the cylinder height b is 253mm.

[0064] The upper part of the upper nozzle installation hole 7 is circular truncated, the upper port diameter of the circular pl...

Embodiment 3

[0072] As described in Example 1, the difference between the ladle annular seam type breathable upper nozzle seat brick is that:

[0073] like Figure 7 As shown, the number of the annular seam 2 is 3 rings, the annular seam width a is 1.3mm, and the annular seam height h is 220m.

[0074] The air chamber box 3 is in the shape of a ring as a whole, the longitudinal section of the air chamber box is rectangular, the width x of the rectangle is 50 mm, and the height y is 40 mm.

[0075] Described flow steel hole 5 is circular frustum shape, and the upper port diameter d1 of circular frustum is 210mm, and lower port diameter d2 is 160mm, and the height c of circular frustum is 80mm, and described connection hole 6 is cylindrical channel, and the diameter of cylindrical channel and The diameter of the lower port of the round platform is the same, and the height b of the cylinder is 268mm.

[0076] The upper part of the upper nozzle installation hole 7 is circular truncated, the ...

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Abstract

The invention relates to a steel ladle circumferential weld type ventilating water feeding opening seat block. The steel ladle circumferential weld type ventilating water feeding opening seat block comprises a steel ladle water feeding opening seat block body, circumferential welds, an air chamber box and an air inlet pipe, and a liquid steel hole, a connecting hole and a water feeding opening mounting hole which penetrate up and down are formed in the middle of the steel ladle water feeding opening seat block body. In the casting steel ladle pouring process, argon is blown in all the way, theargon flow is automatically adjusted according to changing of the net weight of steel ladle inner molten steel, the argon penetrates through the circumferential welds to form tiny argon bubbles, mostargon bubbles move upwards to form an annular air curtain screen on the periphery of a steel ladle water feeding opening, air purge is carried out on molten steel about to enter the steel ladle waterfeeding opening, stable and continuous annular air flow is formed in the water feeding opening, accretion of water feeding opening is restrained, and in the steel ladle pouring later period, steel ladle roughing slag caused by flow vortex and current drainage sunken pit is effectively restrained.

Description

technical field [0001] The invention relates to a ladle circular seam type air-permeable upper nozzle block and an argon-blowing metallurgical method, belonging to the technical field of steelmaking process in iron and steel metallurgy. Background technique [0002] The cleanliness and castability of molten steel are the focus and difficulty of steelmaking process control. In continuous casting production, after the slag in the ladle flows into the tundish, it will cause the burning loss of easily oxidized alloy elements such as aluminum and titanium in the molten steel. , and produce alumina inclusions, affecting the cleanliness of molten steel, and easily causing steel surface quality problems. Generally, the ladle slag detection technology is used to reduce the amount of ladle slag, that is, the nozzle is closed and the pouring is stopped when the ladle slag is detected at the later stage of ladle pouring. However, the following problems are found in the actual production...

Claims

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Application Information

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IPC IPC(8): B22D41/58B22D11/117B22D11/18
CPCY02P10/20
Inventor 武光君
Owner SHANDONG IRON & STEEL CO LTD
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