Ladle casting combined drainage device and method of manufacture and use

Abstract

The invention provides a combined drainage device for steel ladle casting and relates to a drainage device for starting casting from a ladle nozzle. The combined drainage device is characterized in that a drainage plug comprises an upper sand cylinder, a lower sand cylinder, a fastening lath and an underneath drainage sand bag, wherein the upper sand cylinder is a round cylinder, and the diameter of the upper sand cylinder is larger than that of an upper opening of a nozzle; the lower sand cylinder is a cone-shaped basin, the diameter of the upper end of the lower sand cylinder is equal to the inner diameter of the upper opening of the nozzle, the lower sand cylinder is matched with a cone-shaped body of the nozzle, the diameters of flat sides of edge holes of the lower sand cylinder and the upper sand cylinder are the same, the upper sand cylinder is fixed on the lower sand cylinder, and drainage sand is arranged in the upper sand cylinder; the fastening lath is arranged at the lower part of the lower sand cylinder, the underneath drainage sand bag is filled into a cavity formed by the surrounding of the fastening lath, and the fastening lath is extruded to the inner wall of the nozzle. The combined drainage device has the advantages that the conception is novel, the manufacturing process is easy, and the manufacturing cost is low; the drainage sand is arranged in the underneath drainage sand bag and a cylinder formed by the upper sand cylinder and the lower sand cylinder, respectively, the mass transfer is little, and the combined drainage device is light, convenient and flexible; the drainage sand is filled into the nozzle, so that the molten steel is prevented from being solidified, the casting is benefited, the loss caused when the casting cannot be carried out is reduced, and the steel-making production is benefited.

Description

technical field [0001] The invention belongs to a casting melt container, in particular to a drainage device for starting casting at a nozzle at the bottom of a ladle. Background technique [0002] Casting is an important process in steelmaking production. Successfully smelted molten steel is poured into ladles and cast directly or after refining. In the early days, the nozzle at the bottom of the ladle used a stopper rod to control and adjust the molten steel, and the pouring started smoothly. Because the movement of the stopper rod was difficult to control, the plug head was easy to fall off and was discarded. Most factories now use a sliding nozzle to intercept and control the casting of the ladle. In order to prevent the remaining steel, residue and other debris in the ladle from blocking the ladle nozzle (hereinafter referred to as the nozzle) and ensure smooth pouring, a special person is set up at the tapping station to throw it at the nozzle. Drainage sand in bags. ...

AI Technical Summary

Problems solved by technology

The disadvantages are that the structure of the sand storage device is complicated, the shell consumes a lot of materials, and it is inconvenient to manufacture and use; the nozzle is not filled with drainage sand, and the molten steel is poured into the ladle directly into the nozzle, and the molten steel is easy to condense in the nozzle, especially for molten steel refining. If the delay time is long, the molten steel in the nozzle is more likely to solidify, which seriously affects the pouring of molten steel

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