Method for production of continuously-cast precursor
A continuous casting and product technology, which is applied in the direction of manufacturing tools, casting equipment, casting melt containers, etc., can solve the problem of uneven melting of lubricating powder in the crystallizer, difficulty in producing favorable and stable internal flow of the mold, adverse effects on sliding performance, etc. question
Inactive Publication Date: 2003-10-01
VOEST ALPINE AG
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Problems solved by technology
This phenomenon causes inhomogeneous melting of the mold lubricant powder on the surface of the liquid pool and leads to localized adverse effects on the sliding properties between the strand and the wall of the mold
When conventional submerged nozzles are used to cast wide slabs, it is difficult to generate a favorable and stable flow inside the mold for the above reasons
Method used
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[0029]Continuous steel casting plants for the production of wide slabs are well known and described in the above-mentioned documents and basically comprise a tundish for storing molten steel from which the molten steel is fed into a vibrating mold through a submerged nozzle. The partially solidified strand is drawn vertically downwards out of the mold and is subsequently cooled in the strand guide frame and then turned horizontally. The fully solidified strand is then divided into slab segments by means of a flame cutter and then sent for further processing.
[0030] The slab forming takes place in the vibratory continuous casting mold 1, the vibratory continuous casting mold such as Figure 3b As shown, it consists of wide side walls 2, 3 facing each other and narrow side walls 4, 5 that can be clamped between the wide side walls, and the narrow side walls 4, 5 can be moved perpendicular to the pouring direction in order to set Different strand widths (B). The inner surface...
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The present invention relates to a method for manufacturing a continuous casting primary product, especially a wide slab with a thickness D>100mm and a width B=2700mm-3500mm, at a pouring rate of VC<2m / min in a continuous casting device, and the continuous casting device for manufacturing the product and Then the submerged nozzle. It is proposed to obtain the conditions for uniform solidification of the slab and the uniform melting and distribution of the mold lubricant powder. The melt leaves the submerged nozzle through the opposite outlet and in the form of a motion pulse directed towards the narrow side wall of the mold. For a certain initial The aspect ratio of the product, according to the ratio of the melt velocity (VK) to the pouring velocity (VC) in the core cross section of the submerged nozzle, the width (b) of the submerged nozzle and the height of the side outlet of the submerged nozzle ( The design value of h), that is, the slab shell is formed uniformly along the wide and narrow side walls of the crystallizer in the pouring direction and tangential direction.
Description
technical field [0001] The present invention relates to continuous casting equipment with V C <2m / min pouring rate for manufacturing continuous casting primary products and especially wide slabs with thickness D>100mm and width B=2700mm-3500mm, where the melt and preferably molten steel passes through the submerged nozzle from the ladle Into the crystallizer formed by the wide side wall and the narrow side wall and continuously pull out from the crystallizer and cool the partially solidified preliminary product with a liquid core and a solidified shell. The invention also relates to the continuous casting primary product. Casting equipment and submerged nozzles for this continuous casting equipment. Background technique [0002] When the submerged pouring method is used in continuous casting, the melt is usually sent from a ladle, which is mostly in the form of a tundish, through a submerged nozzle connected to it into a vibrating mold covered with mold lubricant powd...
Claims
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IPC IPC(8): B22D11/10B22D41/50
CPCB22D11/10B22D41/50
Inventor J·瓦青格M·布鲁迈尔P·吉特勒尔
Owner VOEST ALPINE AG