Thin strip continuous casting method and device

Abstract

The invention provides a method and device for continuously casting a thin strip. Liquid steel is injected into an intermediate bag from a big intermediate through a long liquid steel port, the intermediate bag is a single-flow intermediate bag, the liquid steel flows under a dam arranged at one side in the intermediate bag, goes across a first baffle dam, and enters a steel passageway with an induction heating function, the temperature of the liquid steel which is heated in an induction way is 30-50 DEG C higher than that of the liquid steel injected into the intermediate bag, and the heated liquid steel flows out of an outlet arranged at the other side of the intermediate bag to a liquid steel port to be cast. According to the invention, the constant temperature casting in the continuous casting of the thin strip can be realized, so that the quality difference before and after the thin strip is rolled can be overcome, and the pull speed of the thin strip can be stabilized due to the constant temperature casting, therefore, the state of a molten pool cm be stabilized, and the quality defects caused by the speed change can be reduced. The floating of mingled materials in the liquid steel can be completely promoted, so that the quality of the cast strip can be improved; the superheat degree of the large-bag liquid steel can be reduced, so that the energy consumption can be reduced, the quality of the liquid steel can be improved, and the loss of refractory material can be reduced; and the formation of cold steel on the surface of the molten pool at the initial stage of casting can be reduced, so that the normal casting period can be reached quickly.

Description

technical field [0001] The invention relates to the field of thin strip continuous casting, in particular to a thin strip continuous casting casting method and device. Background technique [0002] In recent decades, with the advancement of continuous casting technology and the improvement of online computer control, metallurgical industries in various countries in the world have been hoping to reduce energy consumption and production costs in the iron and steel industry. Therefore, it has become a research topic to directly cast molten steel into finished products. goal pursued tirelessly. [0003] One of the main forms of thin strip continuous casting is that molten steel passes through high-speed rotating crystallization rolls, and is solidified into a 2-5mm cast strip under the action of rolling force. At present, the basic technological process of thin strip continuous casting production is: thin strip continuous casting machine (twin-roll, single-roll, wheel-belt type...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a thin strip continuous casting casting method and device, which can realize the constant temperature pouring of thin strip continuous casting, overcome the quality difference before and after the thin strip is rolled, and the constant temperature pouring can stabilize the casting speed of the thin strip, so that the molten pool conditions are stabilized, thereby reducing quality defects due to speed changes

Images