Air curtain skimming device for steel-making converter

A converter steelmaking and air curtain technology, applied in the direction of manufacturing converters, etc., can solve the problems of increased steelmaking production cost, inability to control slag, inconvenient implementation, etc. and low maintenance costs

Inactive Publication Date: 2007-05-16
XINGTAI IRON & STEEL
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Problems solved by technology

The problem with this method is: due to the uncertainty of the timing of adding the slag retaining ball (cone) and the drift of the slag retaining ball (cone), the slag retaining rate can generally only reach about 80%, and the converter cannot be controlled during the tapping process. The slag involved in the eddy current
In addition, the consumption of refractory materials used in the slag blocking ball (cone) is relatively l

Method used

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  • Air curtain skimming device for steel-making converter

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Embodiment Construction

[0014] Referring to Fig. 1, Fig. 2, the composition of device of the present invention comprises furnace body 1 and is arranged on the tap hole 2 of body of furnace side wall, is arranged on the annular gas chamber 4 of tap hole sleeve brick 3 places, annular gas slot 5 and with An air intake pipe 6 connected to the annular air chamber, the annular air chamber communicates with the annular air gap, and the air intake pipe is connected to the outside of the tapping hole and communicated with the gas source. The functions of the annular air chamber: first, it can stabilize the pressure of the blown gas; second, it is a suitable way for the air inlet pipe to communicate with the annular air slot. The optimal value of the distance L between the end of the annular air slot and the inner end of the tapping hole is R / tgB, where R is the radius of the tapping hole, and B is the angle between the annular air slot and the inner wall of the tapping hole. The L value determined according ...

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Abstract

The invention discloses a gas curtain slag device of rotary furnace in the metallurgical smelting technical domain, which consists of rotary furnace bulk and tap hole on the furnace, wherein the ring-shaped air chamber is set in the cuff brick of steel outlet hole; the ring-shaped air gap interconnects the inlet pipe of ring-shaped air chamber; the ring-shaped air chamber interconnects ring-shaped air gap with inlet pipe connecting gas source; the separation angle B of ring-shaped air gap and inner wall of outlet steel is 20-40 deg. The invention breaks the vortex from steel outlet, which outputs clean steel.

Description

technical field [0001] The invention relates to a steelmaking device, in particular to an air curtain slag blocking device used in converter steelmaking and tapping, which belongs to the iron and steel metallurgy [0002] technology field. Background technique [0003] With the continuous development of various technologies in the iron and steel metallurgical industry, converter-refining furnace and full continuous casting process for producing high-quality steel are more and more widely used, and the market demand for high-quality steel is increasing. In the production of high-quality steel, less or no slag is an important factor for obtaining high-quality products. How to control inclusions and make molten steel cleaner has been the direction that people in the industry have been trying to explore for a long time. The increase of molten steel inclusions caused by the slag of converter tapping has always been a problem that plagues smelting technology. At present, variou...

Claims

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Application Information

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IPC IPC(8): C21C5/46
Inventor 郝江敏
Owner XINGTAI IRON & STEEL
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