CN201099689Y

CN201099689Y - Steel-tapping hole tube brick

Info

Publication number: CN201099689Y
Application number: CNU2007200867500U
Authority: CN
Inventors: 张嘉严; 张丙旭; 胡波; 洪学勤; 莫瑛
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2007-08-29
Filing date: 2007-08-29
Publication date: 2008-08-13
Anticipated expiration: 2017-08-29

Abstract

The utility model discloses a novel brick of taping hole, which comprises a brick body, wherein the bus of the wall of the tapping inner tube on the brick body is composed of smoothly connected a curvature of parabola y<2>=2Px and a frustum bus which are tangent with each other. The utility model controls the stream shape of steel liquid to improve flow character, thereby effectively reducing the corrosion of steel liquid on walls and improving service life, reducing secondary oxidization of steel liquid to improve metal yield, and improve alloying mixing effect. The service life of the brick is 30% higher than others of same material and tube structure. The brick of taping hole can reduce material consumption and improve working efficiency, with wide application for converter steelmaking and electric furnace steelmaking.

Description

Novel tap hole pipe brick

Technical field

The utility model relates to converter and Electric Furnace Steelmaking, be specifically related to molten steel smelt finish after the come out of the stove a kind of pipe brick of tap hole of passage of molten steel.

Background technology

Tap hole is the passage of coming out of the stove after the molten steel smelting is finished, and its result of use and substitute mode have material impact to STEELMAKING PRODUCTION rhythm.Molten steel stream burst shape and tapping time are controlled for prevent to come out of the stove molten steel secondary oxidation and alloying and have decisive influence smoothly, thereby become an important performance assessment criteria outside work-ing life.

Tap hole brick generally has two kinds of structures at present, and first kind is to assemble with 4-12 piece square-outside and round-inside type sleeve brick is bonding, and another kind is combined by a pipe brick and some block bricks.First kind of bigger use life-span of tap hole brick shape is longer, but it is long to build by laying the time of changeing, and is used for small vessel more, and second kind of tap hole brick built by laying bricks or stones conveniently because of it, uses stablely, changes simple and fast and is extensive use of in medium-and-large-sized converter.Its tapping endoporus has two kinds of straight tube shape and canalis spinalis shapes at present.But in use have following problem, the endoporus ingress easily causes damage because of current difference produces the vacuum cavitation, disturbance is serious during Molten Steel Flow simultaneously, has aggravated molten steel to washing away of causing of tube wall with wear and tear, thus reduction work-ing life.Because hole shape changes greatlyyer in the use, causes the tapping time fluctuation big, thickness of pipe requires thicker.Tapping later stage stream thigh is prone to the stream that looses, and has increased the weight of the molten steel secondary oxidation, and the alloying stirring effect dies down.Work-ing life is shorter relatively.

Summary of the invention

The purpose of this utility model is to provide a kind of tap hole pipe brick of novel tube wall shape, and this kind tap hole pipe brick inwall is a streamlining, and the approach by improving the Molten Steel Flow characteristic is to address the above problem.

The technical solution of the utility model is: novel tap hole pipe brick, it comprises pipe brick body, the tube wall of the interior pipe of pipe brick body is that streamlining bus and frustum bus rotates around central axis and form, and its bus connects and composes so that tangent mode is smooth for one section curve and the frustum bus that intercepts on the para-curve.

Described novel tap hole pipe brick inwall adopts the parabola shaped tubular-shaped structures that is connected with the tangent mode of convergence circle taper to replace the tubular and straight-through tubular-shaped structures of single circular cone can effectively control molten steel stream burst shape and flow characteristics.Tap hole position applicable to converter steelmaking and Electric furnace steel making.

The beneficial effects of the utility model are:

Can form rational Flow Field Distribution at inwall when 1) molten steel flows out, avoid near the mouth of pipe, forming the vacuum air pocket and the destruction of causing, and alleviate and wash away and denude, raising tap hole work-ing life.

2) the pipe brick in use in hole shape change lessly, the tapping time fluctuation is little, the pipe brick wall is thick can attenuate, is convenient to remove change.

3) the tapping later stage molten steel stream strand stable stream that looses that is difficult for can effectively reduce the molten steel secondary oxidation and improves recovery rate of iron, and the alloying stirring effect is obviously strengthened simultaneously.

4) the pipe brick of this of material of the same race kind of tubular-shaped structures exceeds about 30% than other two kinds work-ing life.Economical with materials consumes, and increases work efficiency.

Description of drawings

The novel tap hole pipe of accompanying drawing the utility model brick structure synoptic diagram.

Among the figure: 1-pipe brick brick body, 2-pipe brick outer wall, the parabola shaped part of 3-inwall, 4-inwall convergent cone part

Embodiment

As shown in Figure 1, the brick body of pipe brick comprises pipe brick outer wall 2, and pipe brick outer wall 2 is cylindrical; The interior pipe of the pipe brick body that is made of the parabola shaped bus 3 of inwall and inwall convergence frustum bus 4, the bus of the linear part 3 of thing is intercepting para-curve y ²The bus of one section curve the on=2Px and frustum part, the two connects and composes so that tangent mode is smooth, wherein the para-curve opening towards outside the Pass.The inlet section bus of tapping endoporus is a para-curve, and the para-curve opening direction outwardly; Outlet section is the frustum bus, and the frustum bus is outwards restrained, the tangent connection of two buses.

Claims

1, a kind of novel tap hole pipe brick, it comprises pipe brick brick body, the tube wall that it is characterized in that managing the interior pipe of brick body is that streamlining bus and frustum bus rotate around central axis and form, and its bus connects and composes so that tangent mode is smooth for one section curve on the intercepting para-curve and frustum bus.

2, novel according to claim 1 tap hole pipe brick, the inlet section bus of the endoporus that it is characterized in that tapping is a para-curve, the para-curve opening direction is outwardly; Outlet section is the frustum bus, and the frustum bus is outwards restrained, the tangent connection of two buses.

3, novel according to claim 1 tap hole pipe brick is characterized in that described parabolic equation is y ²=2Px.