CN2373455Y

CN2373455Y - Compound oscillating channel

Info

Publication number: CN2373455Y
Application number: CN 99208882
Authority: CN
Inventors: 王梁兴; 陈天祺; 徐曙平; 陈君华; 江厚祥; 王晓刚; 戚新民
Original assignee: Yixing Baoli Refractory Material Factory; Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 1999-04-29
Filing date: 1999-04-29
Publication date: 2000-04-12
Anticipated expiration: 2009-04-29

Abstract

The utility model relates to a compound oscillating channel which is formed by that an inside lining 2 which is arranged at the impact region of an oscillating channel is compounded with a baked precast block, an abdominal precast block 1 which is arranged on the surface layer of the inside lining, the circumference is in a concave-convex shape, the lower part is provided with supporting feet 6, and the thickness is 50% to 80% of the total thickness. The precast fittings are provided with high temperature strength of channel materials, and the damage caused by molten iron impacting the oscillating channel at an initial stage of use can be avoided. The precast fittings are monolithic precast fittings, are arranged on the surface (or the bottom) of casting materials, only a part of thickness of a working layer is occupied, the rest are casting materials, the safety can be effectively raised, the iron influx is raised 30% to 40%, and thereby, the service life is extended, and the production cost is lowered.

Description

Combined type swing ditch

The utility model relates to a kind of ironmaking utility appliance, particularly a kind of swing ditch of the usefulness of tapping a blast furnace.

At present, iron mouth of big-and-middle-sized blast furnace need be contained iron ladle two or three, and molten iron can not be interrupted when tapping a blast furnace, and the ditch body of swing ditch can tilt within the specific limits to swing and change iron ladle.The swing ditch is generally about 1.5 meters apart from iron runner head height degree, and molten iron is very big to the impact of swing ditch belly.Swing ditch of the prior art all adopts the mould material moulding, and baking is subjected to iron then.Because mould material needs process molten iron progressively sintering itself just can reach required intensity, but the swing ditch is not an iron storage type, it will tap a blast furnace by turns and be subjected to iron by turns with blast furnace iron notch, be subjected to iron after 2 hours intermittently 2～4 hours, intermittently space-time trough material is exposed in the air, ditch material naturally cooling, normally forming of swing pouring refractories self intensity brought difficulty, therefore, it is impaired very fast that its belly is subjected to molten iron to flow ballistic position, especially at the use initial stage, once dashing a dell (40～50 millimeters deep are generally arranged) is arranged by molten iron.This hole has determined the life-span of whole swing ditch, although can also continuing to use also must repair, makes in the ditch material at other position, so iron influx is low, and the cost height.The flat 9-95708 of Japanese Patent Application Laid-Open discloses a kind of " casting house and forming method thereof ", be to have fireproof prefabricated combined and alternatively of concaveconvex structure to build by laying bricks or stones in tap drain melting loss big position or the employing of swing ditch impact site, the working lining that replaces iron runner fully, the prefabricated component connection section adopts mould material or Gunning refractory to fill, other position still adopts cast or spray repair method to construct, and forms liner.This technology cross section from the top to bottom piece of portion build by laying bricks or stones and form, seam is arranged, security is bad, has increased the construction volume of building by laying bricks or stones, and the machicolated form member to build difficulty by laying bricks or stones big.

The purpose of this utility model is to obtain a kind of novel molten iron swing ditch, is to adopt mould material one prefabricated section composite structure in swing ditch impact site, can improve the intensity of use initial stage impact site, and improve its security, and it is simple and convenient to construct.

For achieving the above object, the technical solution that the utility model proposes is:

A kind of combined type swing ditch, it comprises the liner of being made by mould material 2, in the liner 2 of swing ditch belly and/or mouth 7 prefabricated section of firing 1,3 is arranged.

The prefabricated section 1 of swing ditch belly is positioned at the top layer of liner, and the periphery of prefabricated section 1 is a machicolated form.

Feet 6 is arranged at prefabricated section 1 bottom.

The thickness of prefabricated section 1 is 50～80% of total thickness.

The prefabricated section 3 of mouth 7 is positioned at the nexine of liner.

The thickness of the prefabricated section 3 of mouth 7 is 20～30% of total thickness.

Fig. 1 is the structural representation of the utility model combined type swing ditch.

Fig. 2 is an A-A sectional view among Fig. 1.

Fig. 3 is a B-B sectional view among Fig. 1.

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:

Key of the present utility model is to wash away the compound prefabricated section of firing in advance in position (belly and mouth) at the swing ditch, referring to Fig. 1-3, the complex body prefabricated section 1 of belly is placed in the top layer of belly, it has had the hot strength of this ditch material, use the initial stage at the swing ditch, its resistance to impact shock is greater than three times of casting material strength on every side, can overcome substantially like this because of ditch material intensity not form as yet through can't stand the ballistic phenomenon of molten iron.After the complex body prefabricated section was washed away by normal melting loss, the cast bed of material 2 of nexine had had due resistance to impact shock, and whole swing ditch normally is subjected to iron, and melting loss is comparatively even.

The thickness of prefabricated section 1 is 50～80% of total thickness, and 4 feets 6 are arranged at the prefabricated component bottom, is during fabrication prefabricated component to be placed in swing ditch belly to make somebody a mere figurehead, and pours into a mould then, so that mould material is filled, the height of pin is the thickness of nexine mould material.

The periphery 4 of this prefabricated component is a machicolated form, and end camber line 5 can prevent that greater than the face camber line connecting portion of compound prefabricated component section and mould material from cracking; Mould material simultaneously is an expansible at sintering process, and therefore the crackle that produces can be very not dark, can not influence normal operation even pierce some molten iron at the machicolated form section yet.Be integrated poured mould material below the prefabricated component simultaneously, can prevent effectively that molten iron from arriving the box hat 8 of swing ditch bottom.

At the use initial stage, crackle also often appears in the mouth 7 of swing ditch, repairs untimelyly by hot-metal breakout, burns out mouth Steel Sheel 8, can only repair making again.The utility model is at the compound prefabricated section that burns till 3 of nexine of the mouth 7 of swing ditch, and the thickness of prefabricated section 3 is the 20-30% of total thickness, can suppress crack propagation, along with burning till of mouth mould material 2, can normally use.

The utility model is owing to adopting castable-prefabricated component composite construction, with the prior art phase Ratio is the top layer (or bottom) that is placed in castable with the prefabricated component of monoblock, and prefabricated component only Account for the part of working lining thickness, remaining still is castable, and this castable is and other one The position pours into an integrated entity, and can effectively improve its security. This composite construction is to be placed in pendulum The impact site of moving ditch can avoid using the initial stage molten iron to impact the damage that oscillating channel causes, and makes So whole oscillating channel normally is subjected to iron, and melting loss is comparatively even, the expense of production and present phase With, iron can improve 30～40%, thereby has prolonged service life, has reduced producing This.

Claims

1. a combined type is swung ditch, and it comprises the liner of being made by mould material 2, it is characterized in that: in the liner 2 of swing ditch belly and/or mouth 7 prefabricated section of firing 1,3 is arranged.

2. combined type swing ditch according to claim 1, it is characterized in that: the prefabricated section 1 of described swing ditch belly is positioned at the top layer of liner, and the periphery of prefabricated section 1 is a machicolated form.

3. combined type swing ditch according to claim 2, it is characterized in that: feet 6 is arranged at described prefabricated section 1 bottom.

4. combined type swing ditch according to claim 2, it is characterized in that: the thickness of described prefabricated section 1 is 50～80% of total thickness.

5. combined type swing ditch according to claim 1, it is characterized in that: the prefabricated section 3 of described mouth 7 is positioned at the nexine of liner.

6. combined type swing ditch according to claim 1, it is characterized in that: the thickness of the prefabricated section 3 of described mouth 7 is 20～30% of total thickness.