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Ring groove coherent jet nozzle structure

A technology of nozzle and ring groove, which is applied in the field of ring groove cluster jet nozzle structure, can solve the problems that restrict the development and limitation of RH refining process, and achieve the effect of improving penetration depth and stirring intensity, improving efficiency and improving blowing gun position

Active Publication Date: 2016-01-20
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing RH vacuum refining top gun structure limits this process requirement and restricts the development of a more efficient RH refining process. Therefore, it is necessary to study a simultaneous refining process such as oxygen blowing, powder spraying, and combustion heating. Spray gun nozzle structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Such as Figure 1 to Figure 3 As shown, the present invention provides a ring-groove bundled jet nozzle structure, including a coaxially arranged multi-layer sleeve, a nozzle core tube 1, and a nozzle outer tube 2, and the multi-layer sleeves are respectively water-cooled outer tubes from the outside to the inside. 4. Water riser 5, water cooling inner pipe 6, gas inner pipe 7. The water-cooled outer tube 4 and the water-cooled inner tube 6 are welded and sealed with the nozzle outer tube 2, and the gas inner tube 7 is inserted into the nozzle core tube 1 and sealed by an elastic sealing ring. In the structure of the present invention, the cooling water inlet channel is between the water-cooling inner tube 6 and the water riser 5, the cooling water outlet channel is between the water-cooling outer tube 4 and the water-riser 5, and the water-cooling inner tube 6 and the gas inner tube 7 are Oxygen channel, gas channel are gas channels in the inner pipe 7, and powder can...

Embodiment 2

[0058] Such as Figure 5 to Figure 7 As shown, the difference between this example and Embodiment 1 is that the positioning ridge 9 as a positioning structure is arranged on the inner surface of the nozzle outer tube 2, as Figure 6 and Figure 7 As shown, there are 3 or more grooves evenly distributed along the circumference on the inner wall of the equal-diameter circular hole section; the grooves of the outer tube 2 of the nozzle and the cylindrical outer contour of the core tube 1 of the nozzle form a porous annular groove-shaped gas channel 8, The outer contour surface corresponding to the nozzle core tube 1 and the central hole 2a of the nozzle outer tube 2 is a cylindrical surface, the diameter of the cylinder of the nozzle core tube 1 is equal to the diameter of the cylinder hole of the nozzle outer tube 2, and the nozzle core tube 1 is inserted into the nozzle In the annular groove gap formed behind the central hole 2a of the outer tube 2, the total void area at the ...

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Abstract

The invention provides a ring groove coherent jet nozzle structure. The ring groove coherent jet nozzle structure comprises a nozzle core tube and a nozzle outer tube, wherein a centre hole and throttling holes distributed around the center hole are formed in the nozzle outer tube; the nozzle core tube is inserted into the center hole; the nozzle core tube and the nozzle outer tube are positioned by a positioning structure; the external contour of the nozzle core tube and the inner contour surface of the nozzle outer tube center hole form a porous ring groove type gas channel and a conical annular gas channel. Through the ring groove coherent jet nozzle structure, the surrounding and accompanying flow is added at the outer layer of supersonic jet flow, so that the central supersonic jet flow is low in expansion and attenuation; the supersonic jet flow is relatively long; when the ring groove coherent jet nozzle structure is applied to an RH vacuum refining furnace top lance, the penetration depth and the stirring strength of oxygen jet flow to a melting tank can be improved; meanwhile, the jet flow speed is slowly attenuated, so that the blowing gun position of an oxygen gun can be improved; the impact depth of the jet flow on the molten steel is not influenced; the service life of an oxygen gun nozzle is prolonged.

Description

technical field [0001] The invention relates to an injection device for generating a supersonic long oxygen flow in the metallurgical industry, in particular to a ring-groove bundle jet nozzle structure. Background technique [0002] RH vacuum refining device is a kind of iron and steel metallurgy technology developed in the 1950s. In addition to vacuum degassing function, it also has the function of oxygen blowing decarburization, which makes the large-scale smelting of ultra-low carbon steel possible. The device for realizing the function of oxygen blowing and decarburization is initially installed in the lower part of the vacuum tank, then in the middle of the vacuum tank, and finally in the top of the vacuum tank to become a water-cooled top blowing oxygen lance. 现有技术中,无论是RH-KTB顶枪、RH-MFB顶枪、RH-MESID顶枪、RH-PB顶枪还是中国专利200420027046.4、200610076151.0、200820174977.5、200820174973.7、200820174973.7、201110000083.0、201210346652.1、201310431081.6所涉及 The top gun or nozzle of the top gun a...

Claims

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Application Information

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IPC IPC(8): C21C7/10C21C7/068C21C7/064
Inventor 刘向东彭晓华王翔艾磊钟渝行开新高瞻
Owner CISDI ENG CO LTD
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