Positioning method and apparatus for slag stop at time of slag-stopping pouring of revolving furnace and special-purpose slag stop therefor

Abstract

The invention relates to a method for positioning a skimming plug in skimming and tapping of a converter and a special skimming plug. The method comprises the following steps: (1) the mounting of the skimming plug, in which the skimming plug is arranged on a skimming plug positioning device outside the converter, which can rotate along the rotation of the converter and decline along the decliningof molten steel; (2) the presetting of the skimming plug positioning device, in which before the skimming and tapping of the converter, the skimming plug positioning device is positioned in a corresponding position near the converter; with the position, a rotary centerline of a rotation device of the skimming plug positioning device is superposed with a rotary centerline of the converter; and a motion track of the skimming plug in the skimming process is crossed with a tapping mouth; and (3) the entrance to a skimming state by the skimming plug, in which in skimming and tapping, the skimming plug positioning device is controlled in order that the skimming plug arranged on the skimming plug positioning device rotates along the rotation of the converter and declines along the declining of the molten steel till the skimming plug is blocked on the tapping mouth. The method also comprises the corresponding skimming plug positioning device and the special skimming plug. The method can improve the skimming rate; and the skimming plug can be repeatedly utilized.

Description

technical field [0001] The invention relates to a method and equipment for slag-stopping steel tapping of a converter, in particular to a slag-stopper positioning method and equipment for the slag-stopper slag-blocking steel tapping method. Background technique [0002] At present, iron and steel enterprises at home and abroad all use the converter slag blocking tapping technology to control the amount of slag, and the slag blocking slag blocking tapping method developed on the slag blocking ball slag blocking tapping method is commonly used. [0003] The initial slag blocking ball tapping method is to use a spherical object with a specific gravity between the specific gravity of molten steel and slag, and put it above the tapping hole at the end of tapping, and the slag blocking ball will sink under its own gravity. On the interface between molten steel and slag, when the molten steel flows out, the slag blocking ball sinks on the tapping hole, blocking the slag with lighte...

AI Technical Summary

Problems solved by technology

Although this method overcomes some shortcomings of the original slag ball tapping method to a certain extent, there are still the following problems: when the converter condition changes greatly, such as the feedstock in the later stage of converter steelmaking is not liquefied and agglomerated , or when the viscosity of the slag is high, the slag stopper will not sink under the slag like a boat, so the slag stopper will fail, and one slag stopper will be consumed every time it is used

[0005] The root cause of the defects of the above slag blocking ball and slag blocking tapping method and slag blocking slag blocking tapping method is: when the slag blocking slag tapping is performed, the converter generally needs to rotate, and once the slag blocking device is put into the furnace, it can only It rotates completely passively with the rotation of the converter and falls with the drop of molten steel. Its position in the furnace cannot be controlled artificially. In this way, it is inevitable that the slag blocking will fail, and it will be poured into the slag yard together with the slag, which is difficult to reuse and causes waste of resources.

Images