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Porous submersed nozzle for pouring blooms

An immersed, blooming technology, used in casting melt containers, metal processing equipment, casting equipment, etc., can solve the problems of melting loss and falling off of the end orifice

Inactive Publication Date: 2014-07-09
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After being scoured by the passing high-temperature molten steel, the orifice at the end is prone to melting loss or even falling off

Method used

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  • Porous submersed nozzle for pouring blooms
  • Porous submersed nozzle for pouring blooms
  • Porous submersed nozzle for pouring blooms

Examples

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] see Figure 5 ~ Figure 6 As shown, the porous submerged nozzle 10 for casting blooms of the present invention includes a nozzle body 11, which is in the shape of a cylindrical tube with a central through hole. The bottom of the end of the body 11 is a closed structure, corresponding to the four walls of the crystallizer. Have a pair of molten steel spit holes 12 arranged up and down on each side respectively, totally eight, and the vertical centerlines of every pair of molten steel spit holes 12 are on the same line. Wherein, the angle a between the upper molten steel spout hole 12 and its horizontal centerline is set at -15° to -45°, and the angle b between the lower molten steel spout hole 12 and its horizontal centerline is set at 15° to 45° . In the same pair of molten steel discharge holes 12, the distance betwee...

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Abstract

The invention discloses a porous submersed nozzle for pouring blooms. The nozzle comprises a nozzle body, wherein the bottom of the tail end of the body has an enclosed structure; a pair of molten steel ejecting holes formed one above the other is formed on four side faces corresponding to the four walls of a crystallizer respectively; the vertical central lines of each pair of molten steel ejecting holes are positioned on the same line. Through the molten steel ejecting holes, high-temperature molten steel can be ejected onto the four walls of the crystallizer, high-temperature regions are centralized on the upper portion of the crystallizer, melting of casting powder is facilitated, and a casting blank can be protected from air oxidation more effectively. Molten casting powder can slide down between the casting blank and the wall of the crystallizer along a meniscus, thereby effectively reducing the mold friction. Meanwhile, the inclination angles of upper and lower ejecting holes are opposite, thereby inhibiting turbulent flow.

Description

technical field [0001] This invention relates to submerged nozzles, and more particularly to a porous submerged nozzle for casting blooms. Background technique [0002] The submerged nozzle is the channel through which molten steel flows from the tundish into the mold. Its function is to immerse the nozzle into the molten steel surface in the mold for pouring, so as to prevent secondary oxidation of molten steel during pouring. In addition to the function of protecting the steel flow and preventing the secondary oxidation of the molten steel, the submerged nozzle can also change the flow state of the injection flow in the crystallizer, prevent the injection flow from scouring the solidified layer and cause steel leakage and cracking, and reduce the flow rate of the injection flow. The impact depth promotes the floating of inclusions in the crystallizer, and disperses the heat brought in by the injection flow, which is conducive to the uniform growth of the billet shell. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D41/50
Inventor 刘旭峰张立郑宏光
Owner BAOSHAN IRON & STEEL CO LTD
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