Continuous casting machine pouring device and pouring method

Abstract

A pouring device and pouring method for a continuous casting machine, the device comprising: a double ladle turret, including two single-arm turrets, any single-arm turret can rotate around the slewing support to receive a ladle at a ladle receiving position, and rotate to pour molten steel The molten steel in the ladle is injected into the tundish; the upper end of the tundish has injection holes respectively connected with the sliding nozzles of the ladle, and the lower end has nozzles for injecting molten steel into the crystallizer; two single-arm turrets respectively receive After receiving the ladle, it turns to the molten steel pouring position to inject molten steel into the crystallizer. By adjusting the opening of the sliding nozzle, the flux of molten steel injected into the tundish is the same as that of the tundish flowing into the mold, so that the liquid level of the tundish remains stable. The molten steel composition and molten steel temperature are uniform between different heats. The invention eliminates the time difference of molten steel connection caused by ladle replacement, ensures the liquid level, temperature field, flow field, removal behavior of inclusions and the stability of molten steel composition, and realizes continuous non-differential solidification and forming of molten steel.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a pouring device and a pouring method for a continuous casting machine. Background technique [0002] Continuous casting is an important link in the current steel production process. Qualified molten steel is continuously and stably solidified through the continuous casting process to provide qualified billets for subsequent rolling. [0003] Since the qualified molten steel smelted in the steelmaking process is stored and transported through ladles with a certain capacity, in order to avoid interruption of continuous casting and pouring due to inversion of the ladle, the continuous casting machine is equipped with equipment such as a ladle turret and a tundish for transferring molten steel. The qualified molten steel smelted in the steelmaking process is hoisted to the receiving position of the ladle turret and waits for pouring. The molten steel at the pouring position of th...

AI Technical Summary

Problems solved by technology

Therefore, during the intermittent period when the ladle turret turns and switches ladles, no molten steel is added to the tundish, but the flux of molten steel from the tundish to the crystallizer does not change, resulting in a decrease in the liquid level of the molten steel in the tundish, and the molten steel in the tundish When the temperature and flow field change, the floating behavior of the molten steel in the tundish also changes, which also has an adverse effect on the purity of the molten steel. , the temperature of molten steel in the tundish, the flow field, and the floating behavior of inclusions will change again, resulting in poor quality stability of the continuous casting slab during this period

Especially with the rapid development of continuous casting high-efficiency technology and the development of endless continuous casting and rolling process technology, the casting speed of continuous casting machine is getting higher and higher. The furnace capacity has not been increased, resulting in shorter and shorter ladle pouring time and more frequent replacement of ladle pouring, which seriously affects the continuous stability and uniformity of continuous casting slab quality

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