Automatic slag adding machine and slag adding method

Abstract

The invention relates to an automatic slag adding machine and a slag adding method. The automatic slag adding machine comprises a trolley mechanism, wherein a material conveying system is arranged on the trolley mechanism in a horizontally swinging manner; a material storage system is arranged at a position of the material conveying system, which is close to the tail of the material conveying system; and the head of the material conveying system is provided with a material blanking tube. The automatic slag adding machine is characterized in that the material blanking tube is connected with an oscillating arm system and can do linear motion along a crystallizer. The automatic slag adding machine has the advantages that the conventional arc motion slag adding mode is replaced by a linear motion slag adding mode, so that the linear motion slag adding mode is consistent with the section of the crystallizer, and the section of the crystallizer can be added with slag completely; the area of the crystallizer can be fully covered; a phenomenon that molten steel and air are oxidized secondarily can be avoided, molten steel oxide impurities are reduced, the quality of ingot is improved, the labor intensity of workers is reduced, operation accidents are reduced, the production cost is saved, and the automation level of continuous casting production operation is increased; due to a protection slag thickness detection function, the number of added slag can be controlled; and the waste of the protection slag is avoided. The automatic slag adding machine is rational in structural design, meets an actual production requirement, is low in loss, convenient to run and easy to operate and does not waste any slag.

Description

technical field [0001] The invention relates to the field of processing molten metal by using protective powder in the steelmaking process of the metallurgical industry, belongs to IPC classification B21D 11 / 111, and in particular relates to an automatic slag adding machine and a slag adding method. Background technique [0002] In the continuous casting production, the crystallizer is the key part of the continuous casting machine. The liquid steel is cooled for the first time through the mold to form the primary slab shell. Adding mold slag to the surface of the liquid steel, on the one hand, can fully lubricate the billet and the crystallizer and control the heat transfer, on the other hand, the mold slag can completely cover the liquid steel, which can isolate the molten steel from contact with the air, maintain the composition of the steel, and prevent The secondary oxidation of molten steel in contact with air plays a key role in reducing the oxide inclusions inside the ...

AI Technical Summary

Problems solved by technology

The slag adding machine with the patent application number of 200820187959 moves at the same time when the whole body and the conveying pipe are working. When replacing the protective slag or filler, the operator and the machine need to move at the same time, adding as they go, difficult to operate, and prone to accidents

[0005] 2. There is no function of heating mold slag, directly add cold slag

The slag feeder with patent application No. 201110032085.8 directly transfers the slag material to the crystallizer, and the slag material contains moisture, which affects the quality of the billet

[0006] 3. It is impossible to approach the nozzle, and it is necessary to manually add slag

The slag adding machine with the patent application number of 200820187959 has a dead angle at the nozzle when it moves, and when the swing arm moves to the minimum range, it is far away from the nozzle and cannot cover the nozzle

[0007] In addition, in the automatic slag adding machine imported from abroad, the slag lowering pipe moves in an arc, which cannot match the shape of the crystallizer, resulting in waste of slag or insufficient slag addition. The branch pipe is too long, occupies a very large area, and is difficult to control

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