CN2403519Y

CN2403519Y - Combine molten steel slag-pushing off filtering apparatus for intermediate ladle

Info

Publication number: CN2403519Y
Application number: CN 99255076
Authority: CN
Inventors: 张会军; 吕鹏; 韩竞成; 徐国华; 叶清; 侯才龙; 吴玉环; 张秀木; 王乃荣; 张志光; 徐颖; 王华兵
Original assignee: Pudong Iron & Steel (group) Co Ltd; Central Iron and Steel Research Institute
Current assignee: Pudong Iron & Steel (group) Co Ltd; Central Iron and Steel Research Institute
Priority date: 1999-11-26
Filing date: 1999-11-26
Publication date: 2000-11-01
Anticipated expiration: 2009-11-26

Abstract

The utility model relates to a combined molten steel slag blocking and filtering device for intermediate package. The utility model is suitable for the continuous casting of various metals of plate blanks, square blanks, etc. The utility model is composed of a slag blocking and filtering plate and a lower weir plate. The slag blocking and filtering plate is split into two parts. The upper part is a magnesium slag blocking weir plate, and the lower part is two oxidation and calcium through hole type filters. The filter is spilt into an upper layer and a lower layer. Each layer is uniformly distributed with two rows of filtering holes. The filtering hole of the upper layer is small, and the filtering hole of the lower layer is large. The lower weir plate is split into an upper layer and a lower layer. The middle of the bottom of the lower layer is provided with a prepared hole. The utility model has the advantages of easy manufacture, convenient masonry, firmness, and good filtering effect.

Description

Tundish combined type molten steel pushing off the slag filter

Tundish belongs to the metal continuous cast servicing unit with combined type molten steel pushing off the slag filter, can be used for various metal continuous casts such as slab, square billet.

During existing continuous casting was produced, the enterprise that has only used slag weir in tundish, and this situation only can be removed the slag that floats over the molten steel surface, can't remove the nonmetal inclusion in the molten steel; Also have extremely indivedual enterprises to use fritter calcium oxide mass filter, cut out on the pushing off the slag weir plate before using and the close hole of filter size, filter is inlayed up, use the baking back.This situation is except slag, though can also remove the nonmetal inclusion in the part molten steel---this is when passing through filter owing to molten steel, non-metallic inclusion in the molten steel and calcium oxide generation chemical reaction, product floats to liquid level and enters due to the slag blanket, but its mounting means complexity, and filter easily in use is floated to liquid level and ineffective.

The purpose of this utility model is to provide a kind of being convenient to make, and builds convenience, firm by laying bricks or stones, the tundish of good filtration effect combined type molten steel pushing off the slag filter.

Based on above-mentioned purpose, the utility model adopts fabricated structure, it is made up of pushing off the slag filter and following weir plate, described pushing off the slag filter is divided into two parts, top is magnesia pushing off the slag weir plate, two lifting bale handles are arranged above the described pushing off the slag weir plate, the bottom is two upright through hole type filters of calcium oxide, and described filter divides two-layer again, and the upper filter filtering holes is two rows and evenly distributes, the aperture is φ 16-20mm, the lower filter filtering holes also is two rows and evenly distributes, and the aperture is φ 20-26mm, and described weir plate down also is divided into double-layer structure up and down, there is a preformed hole in lower floor in the middle of the bottom, in case retain molten steel in the bag.

The utility model adopts knockdown pushing off the slag filter, during use, slot at bakie working lining, it is directly built by laying bricks or stones in tundish, magnesia pushing off the slag weir plate is adopted on top, in order to remove the slag on molten steel surface, the upright through hole type filter of calcium oxide of double-layer structure is adopted in the bottom, pore size filter is the key factor that influences filter efficiency, reduce filter opening, reality is exactly the haptoreaction area that increases filter and steel inclusion, improves filter efficiency, but if the aperture is too small, can make molten steel be easy to be set in the filtering holes when temperature is low, what influence was produced carries out smoothly, reasonably designs and arrange filter opening, both can obtain filter effect preferably, can increase again as far as possible non-metallic inclusion in the molten steel come-up and with the chance of calcium oxide generation chemical reaction.So lower filter designs the smaller filtering holes in two rounds footpath at the middle and upper levels, diameter is φ 16-20mm, and two rows evenly distribute, and lower floor designs the bigger filtering holes in two rounds footpath, and diameter is φ 20-26mm, and two rows evenly distribute.

Add in the tundish and load weir plate, can prolong the mobile distance of molten steel, increase floating foreign chance in the molten steel, further improve filter effect.Its material can be calcium oxide, perhaps magnesia.

Compared with prior art, this filter has following advantage:

1, the appearance and size of weir plate was decided according to sectional dimension in the tundish under the pushing off the slag filter reached, thereby can slot at bakie working lining, and it is directly built by laying bricks or stones in tundish, built convenience, firm by laying bricks or stones, used reliably.

2, because the weight of used calcia material increases greatly, correspondingly increase the chance that chemical reaction takes place with it for non-metallic inclusion in the molten steel, strengthened the effect of cleaning molten steel.

3, adopt fabricated structure, can give full play to the difference in functionality of different materials.

4, split manufacturing is convenient to produce and transportation.

In conjunction with the accompanying drawings this filter is described further.

Fig. 1 is a tundish with combined filtering device and installation site schematic diagram.

Fig. 2 is a filter top magnesia pushing off the slag weir plate contour structures schematic diagram.

Fig. 3 is a filter bottom calcium oxide filter structure schematic representation.

Fig. 4 is a weir plate structural representation under the filter.

Among Fig. 1,1 is the tundish liner, and 2 is magnesia pushing off the slag weir plate, and 3 is the calcium oxide mass filter, and 4 are following weir plate.

Among Fig. 2,5 is that bale handle is used in lifting, and 2 is magnesia pushing off the slag weir plate.

Among Fig. 3,6 is upper strata calcium oxide filter, and 7 is lower floor's calcium oxide filter.8 is filtering holes.

Among Fig. 4,9 is weir plate under the upper strata, and 10 is weir plate under the lower floor, and 11 is preformed hole.

Claims

1, tundish combined type molten steel pushing off the slag filter, it is characterized in that: it is made up of pushing off the slag filter and following weir plate, described pushing off the slag filter is divided into two parts, top is magnesia pushing off the slag weir plate, two lifting bale handles are arranged above the described pushing off the slag weir plate, the bottom is two upright through hole type filters of calcium oxide, described filter divides two-layer again, the upper filter filtering holes is two rows and evenly distributes, the aperture is φ 16-20mm, and the lower filter filtering holes also is two rows and evenly distributes, and the aperture is φ 20-26mm, described weir plate down also is divided into double-layer structure up and down, and there is a preformed hole in lower floor in the middle of the bottom.