DE102006010287A1 - Oxygen lance head for steel production, comprises an oxygen collecting chamber, circularly blowing nozzles arranged near to the chamber, a cool water guidance channel connected to the blowing nozzles, and a cool water supplying channel - Google Patents

Abstract

The oxygen lance head for steel production, comprises an oxygen collecting chamber (2), circularly blowing nozzles (3) arranged near to the collecting chamber, a cool water guidance channel connected to the blowing nozzles, a cool water supplying channel (9), and a cool water recirculation channel (8). The water guidances are divided into two partial flows in the supplying channel arranged in flow direction behind the collecting chamber. The water guidance passes in straight direction and surrounds the blowing nozzles arranged with intervals.

Description

The The invention relates to an oxygen lance head with a collection chamber for oxygen, with several circular arranged around the axis of this chamber around outlet nozzles, with one each of a blowing nozzle assigned channel for the cooling water supply with a supply channel and a subsequent one Return passage for the cooling water.

such Oxygen lance heads especially used in steelmaking. By They pass high purity oxygen into a converter or like blown. The flow velocity The oxygen is usually in the supersonic range. In any case if such oxygen lance heads are extremely heavily loaded components, the guarantee acceptable life requires a particularly intensive, effective cooling.

From the DE 101 02 854 C2 Such an oxygen seed head is known. Each exhaust nozzle is supplied by a closed, undivided line system coolant. The density of the coolant flow is distributed unevenly in the reversal region between inflow and outflow of the coolant such that a flow displacement takes place in the direction of its reversal point. This then results in a reduction of the cooling effect, which in turn results in an increase in the coolant expenditure and / or a shortening of the service life.

Of the Invention is now based on the object, in such a Oxygenating head by improved cooling the service life of highly loaded To further increase components.

These Task is according to the invention in a Oxygen lance head of the type mentioned solved in that in the feed channel in the flow direction behind the collecting chamber, the water supply is divided into at least two partial streams.

The Distribution of the water supply in the feed channel above the collection chamber causes the coolant in the cooling water flow in desired Way can be brought to the respective lance head and avoids on the other hand, that is the flow of cooling water too soon after radially outside to the return section oriented. As a result, the cooling effect is improved and thus increases the service life of the individual exhaust nozzle.

It is further proposed that the water flow S-shaped and the associated exhaust nozzle with distance encloses.

In dependence from the present construction of the oxygen lance head it may be expedient that the water supply runs straight and the associated exhaust nozzle surrounds at a distance.

In dependence Of the given situations, the inclination, curvature and length of the respective water supply be optimally adapted.

Subsequently, will now an embodiment the device according to the invention described with reference to drawings.

It shows:

1 an axial section through an inventively designed device and

2 a sectional view of an oxygen lance head with respect to the collection chamber.

The oxygen lance head 1 is rotationally symmetrical. He has a collection chamber 2 through which oxygen exhaust nozzles 3 is supplied. An outer wall 4 of the oxygen lance head 1 has a central pier 5 that the head 6 the collection chamber 2 with the outer jacket 7 of the oxygen lance head 1 combines. On the inside of the outer jacket 7 is a return channel 8th intended for the cooling water drainage. A feeder channel 9 for the cooling water supply runs between the inside of the channel 8th and the outer wall of the collection chamber 2 ,

In the example shown, the cooling water flow is in the reverse region 10 beak-shaped between feed and discharge, the beak tip 11 in the direction of the Mittelsteg 5 is directed.

In the space between the head 6 the collection chamber 2 and the beak tip 11 is the cooling water flow in two partial streams 12 . 13 divided, whose course through an installation 14 is determined. In the embodiment according to 1 is the installation 14 executed in the flow direction S-shaped. The area in its downstream direction section is close to the central web 5 introduced. This causes the partial flow 12 close to the desired optimum range of heat absorption near the associated exhaust nozzle 3 zoom comes. This partial flow 12 Therefore, it is certainly prevented from taking a shortened path for the return flow. Due to the additional positive guidance also of the part stream 13 This results in an improved heat absorption, so improved cooling.

1

Oxygen lance head

2

plenum

3

Ausblasdüse

4

outer wall

5

center web

6

head

7

outer sheath

8th

channel

9

channel

10

reversal region

11

beak

12

partial flow

13

partial flow

14

installation

Claims (3)

Oxygen lance head ( 1 ) with a collection chamber ( 2 ) for oxygen, with several circular with respect to the collection chamber ( 2 ) arranged outlet nozzles ( 3 ), each with a blow nozzle ( 3 ) associated with the cooling water channel with a supply channel ( 9 ) and a subsequent return channel ( 10 ) for cooling water, characterized in that in the supply channels ( 9 ) in the flow direction behind the collecting chamber ( 2 ) the water ducts in each case into at least two partial streams ( 12 . 13 ) are divided. Oxygen lance head according to claim 1, characterized in that the water flow S-shaped and the associated exhaust nozzle ( 3 ) encloses at a distance. Oxygen head according to claim 1, characterized in that the water supply is rectilinear and the associated exhaust nozzle ( 3 ) encloses at a distance.