Method for remedying square billet uniflow casting halt

Abstract

The invention relates to a method for remedying square billet uniflow casting halt. The method comprises the following steps of 1 closing an accidental flow sliding plate, stopping casting and outputting a tail billet to avoid steel throwing of the tail billet; 2 stopping argon supply for an accidental flow, enabling the upper casting portion of the accidental flow to be in an idle state and preventing moving steel flows from scouring the sliding plate; 3 dismounting a submersed nozzle of the accidental flow so as to facilitate plugging and ingot guiding; 4 enabling the accidental flow to penetrate a bottom-installed ingot guiding rod, performing plugging again and then installing the baked submersed nozzle again to prevent steel from being casted at the cold nozzle; and 5 performing normal continuous casting of other non-accidental flows in a continuous casting mode and starting to perform casting of the accidental flow in a re-starting mode after plugging. Compared with the prior art, the method for remedying the square billet uniflow casting halt has the advantages of being capable of achieving continuous casting, greatly improving the production efficiency, effectively shortening the production delay time, improving the product quality and the yield and being considerable in production effectiveness.

Description

technical field [0001] The invention relates to the technical field of continuous casting technology, in particular to a remedy method for billet single-strand broken casting. Background technique [0002] With the development of the iron and steel industry, the continuous casting ratio of more and more enterprises has been improved, and many iron and steel enterprises have realized full continuous casting production. As we know, if the deoxidation is not sufficient, molten steel with high oxygen content is likely to cause Bubbles are generated in the continuous casting slab, and product defects such as scarring and folding are easy to occur during the high-line rolling process. If the deoxidation of the aluminum alloy is too low, it will easily cause flocculation during the continuous casting pouring process, resulting in broken pouring; sometimes the operator wants to facilitate deoxidation , add a part of aluminum to the bottom of the large tank in advance, if the aluminu...

AI Technical Summary

Problems solved by technology

[0002] With the development of the iron and steel industry, the continuous casting ratio of more and more enterprises has been improved, and many iron and steel enterprises have realized full continuous casting production. As we know, if the deoxidation is not sufficient, molten steel with high oxygen content is likely to cause Bubbles are generated in the continuous casting slab, and product defects such as scarring and folding are easy to occur during the high-line rolling process. If the deoxidation of the aluminum alloy is too low, it will easily cause flocculation during the continuous casting pouring process, resulting in broken pouring; sometimes the operator wants to facilitate deoxidation , add a part of aluminum to the bottom of the large tank in advance, if the aluminum happens to fall near the nozzle of the large ladle, there may be Al formed during the tapping process. 2 o 3 Gather together and attach to the bottom of the tank. When argon is blown at the bottom during the LF furnace treatment, the bottom of the tank happens to be a dead corner, and the Al attached to the bottom of the tank 2 o 3 There is no chance to float up, and the molten steel in the large tank forms a swirl at the bottom when it flows out through the nozzle, and its suction will pull the Al formed near the nozzle at the bottom of the tank. 2 o 3 The aggregates are brought into the immersion nozzle, which will eventually cause the flocculation to stop pouring. In addition, temperature control, argon blowing control, wire feeding, protective pouring, and protective slag will also have a certain impact on molten steel pouring. The flow stops pouring, and other flows continue to pour. After the current pouring is completed, the pouring must be stopped and the next pouring must be reorganized, so that continuous pouring operations cannot be performed, which affects production efficiency