Application method of tundish for vacuum ingot casting

A tundish and ingot casting technology, used in foundry equipment, casting melt containers, mechanical cleaning, etc., can solve the problems of short residence time, uneven load bearing of tundish, unreasonable temperature distribution, etc., and achieve uniform load bearing and stable casting. , the effect of uniform temperature

Active Publication Date: 2018-08-10
云南玉溪玉昆钢铁集团有限公司
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AI-Extracted Technical Summary

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. Th...
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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.

Application Domain

Melt-holding vesselsCasting cleaning apparatus

Technology Topic

SlagIngot casting +2

Image

  • Application method of tundish for vacuum ingot casting
  • Application method of tundish for vacuum ingot casting
  • Application method of tundish for vacuum ingot casting

Examples

  • Experimental program(1)

Example Embodiment

[0017] refer to figure 1 , 2 , 3, 4;
[0018] figure 2 The relative positional relationship of the steel discharge port 7 of the inner and outer slag retaining weirs, the inner steel passage 51 and the outer steel passage 61 is shown.
[0019] Before pouring the molten steel, the stopper device 3 is lowered to block the nozzle 2, the gate 71 is lowered, and the steel discharge port 7 is blocked; steel is poured, and the molten steel enters the tundish outer chamber 11 through the steel pouring inlet 4, the pouring channel 41 and the steel discharge channel 42, The molten steel gradually rises in the outer cavity 11 of the tundish, and the upward flow field causes the slag to float up; when the liquid steel level rises to the lower 1/2 height of the outer steel passage 61, the gate 71 is lifted to open the slag retaining weir 6 of the outer layer. The steel discharge port 7, the molten steel enters the middle cavity 12 of the tundish through the steel discharge port 7 at the bottom of the outer layer slag retaining weir 6, and the liquid steel level in the outer cavity 11 of the tundish rises slowly. The liquid steel level and the liquid steel level in the middle cavity 12 of the tundish reach the outer steel passage 61 at the same time, ensuring that the liquid steel levels in the outer cavity 11 of the tundish and the middle cavity 12 of the tundish always maintain a rising flow field; when the middle of the tundish When the molten steel level in the chamber 12 reaches the lower 2/3 height of the inner steel passageway 51, lift the gate 71 of the slag retaining weir 5 on the inner layer and open the steel discharge port 7. On the one hand, the molten steel passes through the steel discharge port at the bottom of the square slag retaining weir 8 7 enters the nozzle 2, on the one hand, the liquid steel level in the middle cavity 12 of the tundish and the liquid steel level in the inner cavity 13 of the tundish continue to rise and reach the inner steel passage 51 at the same time, ensuring that the middle cavity 12 of the tundish and the outer cavity of the tundish The liquid steel level at 11 always maintains a rising flow field; when the liquid steel level in the tundish inner cavity 13 reaches the inner steel passage 51, the stopper device 3 is lifted to open the nozzle 2; the rate of pouring steel is controlled, and the molten steel passes through the opening 9 and The steel discharge port 7 of the square slag retaining weir 8 enters the water port 2 .
[0020] When the molten steel in the inner chamber 13 of the tundish approaches the opening 9, the stopper device 3 is lowered to block the opening 9, and the molten steel enters the nozzle 2 only through the steel discharge port 7 at the bottom of the square slag retaining weir 8 .

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