Oxygen top blown rotary converter air curtain slag retaining steel outlet

A technology of oxygen top blowing and tapping, which is applied in the manufacture of converters and other directions, can solve the problems of consuming slag blocking materials and complicated equipment, and achieve the effects of avoiding consumption, convenient operation and improving tapping rate.
CN1948512AInactive Publication Date: 2007-04-18UNIV OF JINAN
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
UNIV OF JINAN
Publication Date
2007-04-18
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a steel-tapping hole with curtain skimming of Linz-Donawitz, which is formed by channels of liquid steel and high pressure draught. The channel of liquid steel is divided into three parts: upper part, middle part and lower part. The upper part is entry channel of round cross-section, the middle part is air cavity channel of ellipse cross-section, and the lower part is outlet channel of round cross-section. The channel of high pressure draught is connected with the air cavity channel of steel-tapping hole. The brachydiagonal direction of ellipse structure of the air cavity channel points to the runner direction of high pressure draught. Diameters of outlet channel become smaller gradually. The favorable result of this invention is as follows: An air cavity of high pressure draught is formed in the steel-tapping hole for skimming, which guarantees liquid steel to drain away extremely and advances the tapping rate of furnaces. Long-range control can be realized with convenient operation and sensitive action.
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Description

(1) Technical field

[0001] The invention relates to a steelmaking taphole device for a converter, in particular to an air curtain slag blocking taphole for an oxygen top-blown converter. (2) Background technology

[0002] The taphole of converter steelmaking is an important key part of converter steelmaking. In order to ensure the separation of molten steel and steel slag, people adopt the technology of slag blocking ball and slag blocking cone. The patent No. 00129339.7 proposes a A sliding tapping part is added to the lower part of the mouth, and the size of the tapping hole is controlled by a hydraulic device to control the flow state of the molten steel, reduce and eliminate the formation of eddy currents, and achieve slag blocking and tapping. However, there are some unsatisfactory places in the above-mentioned technologies. For example, the slag-stopping ball and slag-stopping cone technology needs to consume slag-stopping materials, and the slag-stopping effect is not...

Claims

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