Continuous casting method and device for double-nozzle cast ultra-thick plate blank

A technology of extra-thick slab and double nozzles, which is applied in the field of continuous casting method and device for casting extra-thick slabs with double nozzles, and can solve the problem of inability to exert mold slag lubrication and heat transfer control capabilities and high probability of longitudinal cracks on the surface of casting slabs , affecting the growth rate of the solidified slab shell, etc., to improve the uniform melting and inflow conditions, to facilitate melting, and to improve the surface and internal quality of the slab

Inactive Publication Date: 2012-01-18
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, under the condition of low casting speed, it is difficult for the stream flowing out of the submerged nozzle of the mold to hit the narrow surface of the mold, and cannot form an upward reflow zone, so that the liquid surface of the mold is inactive, and the molten steel flows upward to the molten pool. The heat transfer on the surface decreases, which is not conducive to the melting of the mold slag, and the lubrication and heat transfer control ability of the mold slag cannot b

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  • Continuous casting method and device for double-nozzle cast ultra-thick plate blank
  • Continuous casting method and device for double-nozzle cast ultra-thick plate blank
  • Continuous casting method and device for double-nozzle cast ultra-thick plate blank

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Embodiment 1

[0034] In the continuous casting method for pouring extra-thick slabs with double nozzles of the present invention, two submerged nozzles (the first submerged nozzle 4 and the second submerged nozzle 5) are vertically inserted into an ultra-thick slab continuous casting crystallizer 6 For pouring, the upper end of each nozzle is connected with the tundish 3 respectively, and the side hole at the lower part of each nozzle is connected with the crystallizer 6, thereby forming two independent passages between the tundish 3 and the crystallizer 6; The molten steel is injected into the crystallizer 6 through two independent passages; a stopper rod (first stopper rod 1 or second stopper rod 2) is used to control the flow of the nozzle above each nozzle in the tundish 3 In order to realize the liquid level control of the crystallizer.

[0035] The two nozzles are arranged on the axis of symmetry between the two wide surfaces of the crystallizer 6, and are axisymmetric to the axis of ...

Embodiment 2

[0042] The continuous casting device for casting extra-thick slabs with double nozzles of the present invention mainly includes: a first stopper 1, a second stopper 2, a tundish 3, a first submerged nozzle 4, a second submerged nozzle 5, and a crystallizer 6; the first submerged nozzle 4 and the second submerged nozzle 5 are vertically inserted into the crystallizer 6, arranged on the axis of symmetry between the two wide faces of the crystallizer 6, and with the symmetry between the two narrow faces The axis is axisymmetric, and the distance between the centers of the circular sections of the two nozzles is 600-1200mm; the upper end of each nozzle is connected to the tundish 3, and the side hole at the lower part of each nozzle is connected to the crystallizer 6, thus in the tundish 3 Two independent channels are formed between the crystallizer and the crystallizer 6; the first stopper rod 1 and the second stopper rod 2 are arranged in the tundish 3, and a stopper rod is used ...

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Abstract

The invention relates to a continuous casting method and a continuous casting device for a double-nozzle cast ultra-thick plate blank. First and second submerged nozzles for casting are vertically inserted into an ultra-thick plate blank continuous casting crystallizer, the upper ends of the nozzles are respectively communicated with a tundish, two independent passages are formed between the tundish and the crystallizer, and molten steel in the tundish is injected into the crystallizer through the passages; and the flow of each nozzle is controlled by using a supporting stopper rod above each nozzle in the tundish so as to realize liquid level control of the crystallizer. By using the method and the device, protective casting from the tundish to the crystallizer can be realized; the submerged nozzles are changed on line on the premise that the casting is not opened and the crystallizer is not cut off, so that the casting time of the tundish is improved; and meanwhile, based on structural optimization of the submerged nozzles, the distribution uniformity of the flow field and the temperature field in the ultra-thick plate blank crystallizer can be effectively improved, and the quality of the ultra-thick plate blank is remarkably improved.

Description

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Claims

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Application Information

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Owner WISDRI ENG & RES INC LTD
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