Continuous casting submersed nozzle capable of generating rotational flow
A submerged nozzle technology, which is applied in casting equipment, casting melt containers, metal processing equipment, etc., can solve the problems of submerged nozzle nodules in continuous casting crystallizers, reduce nozzle nodules, low cost, and simple structure Effect
Inactive Publication Date: 2014-10-01
UNIV OF SCI & TECH LIAONING
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Problems solved by technology
[0003] The invention provides a continuous casting submerged nozzle capable of generating swirling flow, which solves the problem of nodules in the submerged nozzle of the continuous casting crystallizer
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[0010] Such as figure 1 As shown, a continuous casting submerged nozzle that can generate swirling flow, the size of the nozzle is 550mm (height) × 80mm (outer diameter) × 40mm (inner diameter), the involute angle is 30°, the nozzle is composed of nozzle inlet 1, The outer wall of the nozzle 4, the inner wall of the nozzle 5 and the outlet of the nozzle 3 are formed. On the inner wall of the nozzle 5, 12 rows of hemispherical crowns 2 are sequentially embedded, and each row has 35 hemispherical crowns. The symmetrical sides are staggered with each other. The radius of each hemispherical crown 2 is 2.5 mm, with a pitch of 10mm, forming a continuous casting submerged nozzle that can generate swirling flow.
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Abstract
The invention discloses a continuous casting submersed nozzle capable of generating rotational flow. The continuous casting submersed nozzle aims to solve the problem of nodulation of a submersed nozzle of a continuous casting crystallizer. The continuous casting submersed nozzle comprises a water gap inlet, a water gap outer wall, a water gap inner wall and a water gap outlet and is characterized in that a hemispheric crown is embedded in the water gap inner wall. According to the continuous casting submersed nozzle capable of generating the rotational flow, after the hemispheric crown is embedded in the water gap inner wall, when liquid steel jet flow passes through, flowing around the hemispheric crown is generated on the peripheral edge of the hemispheric crown, the rotational flow of liquid steel in a water gap is formed, and the impacting depth of the liquid steel in the crystallizer can be reduced; flow of the liquid steel with the continuous casting submersed water gap inner wall can be increased through the rotational flow of the liquid steel, mixed impurities such as aluminum oxide are not prone to adhesion to the continuous casting submersed water gap inner wall, and the nodulation of the water gap is relieved. The continuous casting submersed nozzle is simple in structure, low in cost, easy to machine and long in service life.
Description
technical field [0001] The invention relates to a molten steel continuous casting device, in particular to a continuous casting submerged nozzle capable of generating swirling flow. Background technique [0002] At present, the continuous casting process of iron and steel enterprises has low casting speed, which affects the quality control level. How to improve the flow state of molten steel in the mold has become one of the important means to improve the efficiency of continuous casting and the quality of slab. The research shows that in the continuous casting submerged nozzle, the rotating flow of molten steel can effectively improve the uniformity and stability of the outlet flow, improve the flow state and temperature distribution in the mold, and reduce the liquid temperature at the meniscus in the mold. surface fluctuations, increase the casting speed and reduce the nodulation of the continuous casting submerged nozzle. Japanese researchers proposed to install a spir...
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Inventor 沈明钢于海龙亢淑梅张振山敖广武
Owner UNIV OF SCI & TECH LIAONING