Application method of tundish for vacuum ingot casting

Abstract

The invention discloses an application method of a tundish for vacuum ingot casting. The method comprises the following steps of before steel is poured, lowering a blocking bar to block a water nozzle, and lowering a gate to block a steel outlet; pouring steel, and waiting for the situation that the molten steel enters an outer cavity through a steel pouring inlet and an upward flow field of the outer cavity makes slag inclusion float upward; when the molten steel surface rises to the 1 / 2 height of a steel passage of the outer layer, lifting a gate, opening the steel outlet of the baffle wallof the outer layer, and waiting the molten steel to enter an intermediate cavity through the steel outlet of the baffle wall of the outer layer; controlling the steel pouring rate, and waiting the molten steel surface in the outer cavity and the molten steel in the intermediate cavity to reach the steel passage of the outer layer simultaneously; when the molten steel surface of the intermediate cavity of the tundish reaches the height of 2 / 3 of a steel passage of an inner layer, lifting a gate of the baffle wall of the inner layer, opening the steel outlet, and lifting a blocking bar device toopen the water nozzle; controlling the steel pouring rate, and waiting the molten steel to enter the water nozzle through an opening; when the molten steel in the inner layer approaches the opening,lowering the blocking bar to block the opening, and waiting the molten steel to enter the water nozzle through the steel outlet of the square baffle wall. The method is beneficial to the floating of the slag inclusion, the overall bearing of the tundish is uniform, and the casting is stable.

Description

technical field [0001] The invention relates to the technical field of vacuum ingot casting, in particular to a tundish for vacuum ingot casting. Background technique [0002] The tundish is a device located between the ladle and the vacuum chamber for molten steel casting. Its main functions are to achieve vacuum sealing, store molten steel, and stabilize the flow. [0003] Mainly there are following problems in the prior art: [0004] 1. The flow of molten steel disturbs the molten steel surface in the tundish, and the steel slag formed on the surface of the molten steel will be impacted by the molten steel into a deeper position below the liquid surface, especially when it enters the nozzle and is brought into the ingot mold to form slag inclusions; [0005] 2. The residence time of molten steel in the tundish is short and the temperature distribution is unreasonable; [0006] 3. The slag retaining weir is often set on one side, which makes the load bearing of the tundi...

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Problems solved by technology

[0005] 2. The residence time of molten steel in the tundish is short and the temperature distribution is unreasonable;

[0006] 3. The slag retaining weir is often set on one side, which makes the load bearing of the tundish uneven and affects the casting quality

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