CN2565566Y

CN2565566Y - No eddy water gap

Info

Publication number: CN2565566Y
Application number: CN 02279160
Authority: CN
Inventors: 万恩同
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-13
Filing date: 2002-09-13
Publication date: 2003-08-13
Anticipated expiration: 2012-09-13

Abstract

The utility model provides a no eddy water gap, which relates to an outflow opening (steel-tapping hole) for molten steel in metallurgical industries. Inner baffle plates are additionally arranged on a channel-shaped cavity of an ordinary water gap body; the upper edge of the water gap is additionally provided with upper baffle plates. The inner baffle plates and the upper baffle plates are uniformly distributed or not; the numbers of the inner baffle plates and the upper baffle plates are same or not same. The technical proposal is simple, the upper baffle plates and the inner baffle plates are additionally arranged, the shape of the water gap body is slightly changed, and obvious technical effects are obtained. The utility model prevents the vortex of molten steel, the quantity of rolling slag of the molten steel is made small, so the utility model offers conditions to refining, and the quality of the molten steel is improved. The water gap of the utility model is suitable for that the molten steel is moved from one container to the outflow opening of other containers by the action of gravity. The utility model comprises the steel-tapping hole of a rotary furnace, a brick cup of a steel ladle, an upper water gap, a brick cup of a middle ladle, the water gap, etc. The utility model is also suitable for the water gap of containers when non-ferrous metals are cast.

Description

The absence of vortices mouth of a river

Technical field

The utility model relates to a kind of flow export (being tapping hole) of metallurgy industry molten steel, especially a kind of tapping hole that can suppress the vortex that produces in the MOLTEN STEEL FLOW process.The mouth of a river is that iron and steel enterprise is commonly called as a kind of of tapping hole.

Background technology

In modern steel mill, molten steel volume slag problem is a problem that is difficult to solve fully always.The tapping latter stage of molten steel from the converter to the ladle because the generation of vortex can be involved in molten steel with slag, also may be involved in air when serious, causes in the ladle quantity of slag big, and molten steel returns P, returns S, reduces the recovery rate of alloy.In addition, molten steel is from ladle to tundish latter stage and the latter stage of molten steel from the tundish to the crystallizer, and slag is involved in molten steel, also can cause the molten steel field trash to increase, and influences steel quality.

Since 1970, the countries in the world metallargist addressed this problem trying every possible means.Generally adopt the mode of tapping pushing off the slag to reduce the quantity of slag down both at home and abroad, use refractory material skimming ball or the floating plug of density between molten steel and slag, make it stop up tapping hole latter stage, slag is stayed in the converter in tapping.The present pneumatic pushing off the slag method of promoting just at home is in tapping latter stage, blows to tapping hole is reverse with gases at high pressure, and slag can not be got off.In ladle, slag monitoring system under installing outside the mouth of a river when slag is sneaked into molten steel, because the mouth of a river is in time closed in the change of the signal of telecommunication, prevents to roll up slag.The weak point of these methods is, think that all the existence of vortex is inevitable, passively when the molten steel volume quantity of slag reaches certain proportion, stop tapping process, but at this moment there has been quite a few slag to enter next container, and had greatly steel also stay to obtain in the former container utilizing and be taken as steel scrap.According to design, be involved in molten steel in a large number for fear of slag, the large-scale steel mill that China iron and steel enterprise 1996 introduces generally will stay 1% molten steel, ladle to stay 0.5% in converter, each waters inferior residual 10 tons tundish, so through calculating, therefore 1 year nearly 80,000 tons of molten steel has directly become steel scrap.And actual residual molten steel is greater than this number, and to contain the amount that large-scale field trash causes that the steel billet steel scrap in the steel just bigger because of the volume slag causes.

" Shanghai metal " the 4th phase in July, 1994 has been introduced the three holes tappings method of Kawasaki, Japan: tapping hole is set to be three that equilateral triangle distributes, and the energy that vortex takes place is cancelled each other and reaches the purpose of few slag.The shortcoming of this method be three pitch-rows from awkward contradiction of definite existence, excessively then influence each other for a short time, be not enough to offset vortex energy; Too small, then the intensity of the refractory material between three holes is difficult for reaching, so this method seldom is used.China's utility model patent 94207245.6 has been introduced the middle eddy current that contracts out head piece of continuous casting and has been suppressed baffle plate, it is characterized in that building the circular at tundish brick cup place by laying bricks or stones by 3-7 block length bar shaped refractory material, reduces the intensity of vortex with this.The weak point of this method is, because brick cup is tapering type or bell mostly, baffle plate is far from the vortex core, so the effect that plays is limited, it is reported does not have practical application now.

Summary of the invention

Above-mentioned deficiency at prior art, the purpose of this utility model provides a kind of absence of vortices mouth of a river, it can suppress the formation of mouth of a river vortex effectively, the following quantity of slag when reducing tapping, reduce the molten steel rephosphorization, return sulphur, improve yield of alloy,, improve steel quality for liquid steel refining provides good condition.

The purpose of this utility model is achieved in that the absence of vortices mouth of a river is Internal baffle to be set or/and overhead gage at common mouth of a river body, the Internal baffle of setting up in its tunnel-shaped cavity protrudes and is extended downwards by the upper edge to cavity center, and the overhead gage of setting up in upper edge, the mouth of a river is protruding upward and extend along the radiation of tunnel-shaped cavity upper edge.

The length that absence of vortices mouth of a river overhead gage protrudes to cavity center is 0.2～0.8 times of channel cavity upper edge, mouth of a river radius, and overhead gage height protruding upward is 0.5～4 times of cavity lower edge radius, is 0.5～5 times of cavity upper edge radius along the length of radiating direction; The Internal baffle width is 0.2～0.8 times of each cross section radius on the cavity length direction, Internal baffle along the length of channel direction be 0.5 times of cavity lower edge radius to whole mouth of a river equal in length; The number of Internal baffle, overhead gage is 1 to 6.

The shape of cross section of the tunnel-shaped cavity of absence of vortices mouth of a river body is circle or polygon, and vertical sectional shape is strip, falls trapezoidal or convergent shape; The projection of Internal baffle is shaped as strip, the arc of strip wide at the top and narrow at the bottom, triangle, convergent shape or width unanimity; Overhead gage be shaped as rectangle, trapezoidal or class triangle.

Even or the uneven distribution of absence of vortices mouth of a river Internal baffle and overhead gage, Internal baffle is identical or inequality with the number of overhead gage, the overlapping or not overlapping placement of Internal baffle and overhead gage.

The technical solution of the utility model is very simple, has only increased several overhead gages and Internal baffle, has promptly obtained significant technique effect.1. suppress the vortex in the tapping process, make the molten steel volume quantity of slag few, required with alloy, furnace charge minimizing during refining, cost reduces.2. owing to suppress the tapping vortex, need not take slag into account and be involved in, can improve tap, reduce the steel scrap rate.3. tapping, the quantity of slag is few at present, avoids back the sulphur rephosphorization, and slag is involved in the molten steel few, has reduced the large-scale field trash in the steel; Because tangential velocity is little during the molten steel delivery port, reduced the amount of molten steel suction air, these have all improved the degree of purity of molten steel.Tangential velocity is little when 4. flowing out owing to molten steel, has alleviated the wearing and tearing to the mouth of a river, has improved the mouth of a river life-span.

The mouth of a river of the present utility model is applicable to that molten steel transfers to the flow export of another container from a container by the gravity effect.It comprises the tapping hole of converter, the brick cup of ladle and filling pipe end, the brick cup of tundish, the mouth of a river etc.; The container mouth of a river when also being applicable to non-ferrous metals casting.

Description of drawings

Accompanying drawing 1 is that the absence of vortices mouth of a river is provided with the Internal baffle cross sectional representation;

Accompanying drawing 2 is that the absence of vortices mouth of a river is provided with the overhead gage cross sectional representation.

The longitudinal section schematic diagram also was an A-A position generalized section (not showing overhead gage among Fig. 1) among Fig. 1 when accompanying drawing 3 was the overlapping placement of absence of vortices mouth of a river overhead gage and Internal baffle;

Accompanying drawing acceptance of the bid keep the score state as follows: 1---mouth of a river body; 2---Internal baffle; 3---overhead gage; 4---the tunnel-shaped cavity.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.As shown in accompanying drawing 3, the absence of vortices mouth of a river is an integral body, for the convenience of narrating is divided into three parts with it---and mouth of a river body 1, Internal baffle 2 and overhead gage 3; The placement location of mouth of a river overhead gage 3 and mouth of a river Internal baffle 2 can be overlapping or not overlapping, and the situation when having selected them overlapped in Fig. 3 for illustrated convenience is represented.Fig. 1, Fig. 2 have shown the signal of Internal baffle and overhead gage position in the cross section of the mouth of a river respectively." the class triangle " of described overhead gage is a kind of shape more special trapezoidal (on the appearance difference of going to the bottom bigger, a side base angle is near the right angle, opposite side is an acute angle) in fact; The cross section of described Internal baffle can be the rectangle shown in the figure, also can be curved near the surface of internal cavity place, can form the analogous shape of the mutual intussusception of several circles when the angle of this arc is very big, the variation of these local shapes can not influence the function that the absence of vortices mouth of a river suppresses vortex.

Claims

1, a kind of absence of vortices mouth of a river, center, the mouth of a river is a tunnel-shaped cavity (4), cavity (4) be shaped as long tubular, reverse frustoconic and convergent shape is characterized in that: mouth of a river body (1) is provided with Internal baffle (2) or/and overhead gage (3); The Internal baffle (2) that is arranged in the tunnel-shaped cavity (4) extends downwards to the cavity center protrusion and by the upper edge; It is protruding upward and arrange along the radiation direction to be arranged at the overhead gage (3) of upper edge, the mouth of a river, and the front end of overhead gage (3) exceeds the upper edge and is positioned on the cavity (4).

2, the absence of vortices according to claim 1 mouth of a river is characterized in that: the width that Internal baffle (2) protrudes to the center is 0.2～0.8 times of each cross section radius on mouth of a river channel cavity (4) length direction; Internal baffle (2) along the length of channel direction be 0.5 times of cavity (4) lower edge radius to whole mouth of a river equal in length; Overhead gage (3) height protruding upward is 0.5～4 times of cavity (4) lower edge radius, length along the radiation direction is 0.5～5 times of cavity (4) upper edge radius, and it exceeds the length of protruding to cavity center upper edge, the mouth of a river is 0.2～0.8 times of cavity upper edge radius; The number of Internal baffle (2), overhead gage (3) is 1 to 6.

3, the absence of vortices according to claim 1 and 2 mouth of a river, it is characterized in that: the shape of cross section of the tunnel-shaped cavity (4) of mouth of a river body (1) is circle or polygon; Internal baffle (2) is even or uneven distribution with overhead gage (3), and Internal baffle (2) is identical or inequality with the number of overhead gage (3), Internal baffle (2) and the overlapping or not overlapping placement of overhead gage (3).