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Treatment ladle

A technology for ladle and ladle lining, applied in lighting and heating equipment, furnace components, furnaces, etc., to reduce wastage, improve magnesium recovery, and increase casting productivity

Active Publication Date: 2011-06-01
FOSECO INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is only suitable for bulk metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0068] Example 1 ladle is shown in Figure 3A middle (vertical position) and Figure 3Band 3C (horizontal position). The interior space has a roughly triangular section. Comparative Example 1 is shown in Figure 4A (vertical position) and Figure 4B and 4C (horizontal position). The interior space has a circular section. Dashed lines are shown in each figure to demonstrate the level of molten metal when the ladle is filled to its capacity. A performance comparison of the two ladles is shown in the table below.

[0069]

Example 1

Comparative example 1

Work load (kg)

3000

3000

Total surface area of ​​metal volume (mm 2 )

3719746

3892335

Top surface area (mm 2 )

1028446

1354917

Metal Height-Horizontal (mm)

417.7

427

Metal Height - Vertical (mm)

897

747

Geometric modulus (volume / surface area) (cm)

11.5

11

[0070] As the table shows, although t...

example 2

[0079] show on Figure 1A The steel ladle 10 in is placed in a vertical position, and the material bag is at the lowest point. 20.8 kg of magnesium ferrosilicon (5.38% Mg) was then loaded into the pocket using a long necked funnel placed in the opening. After loading the treatment agent, the ladle is rotated 90° to the horizontal position. Subsequently, the ladle is filled with 1600 kg of molten iron at a temperature of 1480°C. The ladle then pivots back to the vertical position, allowing the molten iron to flow into the pocket. White flames are seen when molten iron reacts with magnesium alloys. The metal is poured out of the spout 17 by tilting the ladle. The result is as follows.

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Abstract

The present invention discloses a treatment ladle comprising a ladle shell containing a generally tubular refractory ladle liner, wherein the ladle can be pivotable between a horizontal position and a vertical position, the ladle liner has a first end and a second end with a continuous sidewall therebetween, an interior space is defined between said first and second ends and the continuous sidewall; the ladle liner additionally comprises a pocket for holding a treatment agent, the pocket being located adjacent the first end and in fluid communication with the interior space and located closer to the top than the bottom of the interior space when the ladle is in its horizontal position and closer to the bottom than the top of the interior space when the ladle is in its vertical position, and a spout for receiving and pouring molten metal located closer to the top than the bottom of the interior space when the ladle is in its horizontal and vertical positions, wherein in the horizontal position, a lower volume of the interior space defined below a plane midway between the top and bottom of the interior space and between the first end and a vertical plane intermediate the first and second ends is greater than an upper volume of the interior space defined above the midway plane and between the first end and said vertical plane. The treatment ladle is designed for the treatment of molten metal with vaporisable additives, in particular in the preparation of ductile iron. The invention also relates to a method of treating molten metal employing the ladle.

Description

technical field [0001] The present invention relates to a ladle for treating molten metal with vaporizable additives, and in particular to a ladle for treating iron with magnesium (Mg) to form ductile iron. Background technique [0002] Ductile iron, also known as spheroidal graphite (s.g.) iron or granular iron, is produced by treating liquid iron with so-called nodularizers (or granulators) before casting. Nodulizers promote the precipitation of graphite in the form of discrete spheroids. In practice, nodulizers usually contain magnesium, such as pure magnesium, or alloys such as magnesium ferrosilicon (MgFeSi alloy) or nickel magnesium (NiMg alloy), which may contain rare rare earth metals. In a typical process, magnesium is added to liquid iron so that the residual magnesium content is about 0.04%, the iron is infused and cast. Adding magnesium to iron is difficult because magnesium boils at a relatively low temperature (1090°C) with liquid iron set to a strong boil an...

Claims

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Application Information

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IPC IPC(8): C21C1/06C21C1/10C22C33/10F27D3/00
CPCC21C7/0075C22C33/10C21C1/06C21C1/10B22D41/04F27D3/0026C21C1/00F27D3/00
Inventor 以马利·波西利特
Owner FOSECO INT LTD
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