Electromagnetic eddy flow downspout

Abstract

The invention provides an electromagnetic cyclone nozzle, comprising a nozzle refractory ceramics tube, which is characterized in that: arranging at least one cyclone electromagnetic field outside the immersion nozzle or ladle nozzle, as adding a electromagnetic cyclone device around the nozzle whose inner and outer parts have water-cool sheathes and mounted on a movable mechanical device. The structure of electromagnetic cyclone device is in the integrated 360 degree annular structure, 180 degree semi-annular structure or split 360 degree annular structure, while the immersion nozzle can be selected from single straight cylinder nozzle, side-hole horizontal nozzle, side-hole inclined nozzle or box-type nozzle. The invention can apply round blank, bloom blank and sheet blank.

Description

Technical field [0001] The invention belongs to the technical field of steel smelting and continuous casting. That is to invent a new type of immersion nozzle and a new type of ladle long nozzle-"electromagnetic swirl nozzle" device. Background technique [0002] In the production process of steel, the refined molten steel is treated by the tundish, and is controlled by the sliding nozzle to enter the immersion nozzle, and flows into the crystal through the lower outlet of the nozzle (single or double) immersed in the crystallizer The device is continuously solidified into a billet. The outflow of the nozzle affects the flow state of the molten steel in the mold. The flow field, temperature field and liquid level fluctuations of the molten steel in the mold directly affect the drawing speed and the quality of the cast slab. [0003] Due to the following reasons, currently, scientists in the field of steel technology generally believe that the drift of molten steel in the immersio...

AI Technical Summary

Problems solved by technology

[0006] (3) There are often problems such as misalignment of the sliding nozzle in operation

Although the three-lobed nozzle has been applied, the technology is complicated, the requirements are high, the consumption of refractory materials is large, and the effect of improving the drift is not great;

First, due to the low scouring life of molten steel for refractory spiral blades, molten steel inclusions are prone to sticking and clogging on the spiral blades, frequent replacement of nozzles not only increases the cost, but also seriously affects production

The second is that in this method, the swirling velocity of molten steel is proportional to the descending velocity, and effective swirling flow cannot be obtained at low-speed flow (such as low-speed casting).

That is to say, in the stage of starting pouring, ladle changing stage and the end stage of casting, molten steel cannot get the necessary swirling flow, and its uniform temperature field, removal of inclusions and other functions will deteriorate sharply

In addition, this swirling method is not adjustable, and it is difficult to adapt to different process requirements, so the application is limited

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