DE2308469C3 - Process to reduce feed wear in converters - Google Patents

Description

to deflect the oxygen jets and / or weaken their kinetic energy. The protective medium can be diametrically opposed to the fresh gas be initiated.

The Schulz of the nozzles and the adjacent masonry takes place preferably in that the nozzles consist of two coaxial tubes and enter through the annular space between the tubes Scliulzinedium is introduced, while the centricc Tube for blowing in the oxygen is used. This results in optimal protection of the Konvcrterfuttcrs in all areas that are indirect or are exposed to immediate effects of oxygen.

To counteract unwanted bath movement, especially when freshening up in the direction of the converter diameter Nozzles occurs, and reduce the risk of ejection, the pressure and / or the amount of the protective medium can be changed as a function of the bath movement will. This is preferably done pulsating with the frequency of the bath movement, but with opposite phase, so that the bath movement is increasingly reduced. When blowing in the Oxygen in the direction of the converter diameter, the Schulzmedium is preferably at right angles in with respect to the oxygen blown in, since the bath oscillation is transverse to the direction in which the oxygen is blown in runs. The bath should move at the highest speed in the direction of the inlet nozzle correspond to the highest pressure of the blown protective medium, while the pressure of the protective medium is lowest while the bath is moving away. In individual cases, the conditions

ίο be determined experimentally, the phase of the introduced protective medium is preferably brought forward somewhat with respect to the bath movement.

ι The dcf bath movement can also be influenced in the way that the oxygen in the

is entry into the melt surrounding protective medium in pulsates in the aforementioned manner; this can be with the same frequency and phase or with a different one Frequency and phase happen in relation to the rest of the protective medium. Finally, the Sauer-

ao fabric itself pulsate in order to influence the bath movement in the aforementioned way.

The method according to the invention offers the possibility of the most wailing protection of the converter lining with simultaneously controlled, but especially calm and ejection-free bath movement.

Claims (9)

ι 2 stirrings have been proposed, whereby through the in-patent claims: "ncnrohr oxygen and through the ring gap between the inner and outer tube a protective medium a 1. Procedure for reducing the FuUerver- is directed. In this way the wear on converters, in which for freshness 5 the shelf life in the area of the nozzles is increased Metals, preferably pig iron, by borrowed to increase. Side wall nozzles below the bath surface With the blowing in of fresh gas, icsoiidcre Fresh gas, especially oxygen, into the oxygen, trail through side wall nozzles.;, But towards melt is blown in, thereby visually identifying the feed holdability in the form of fines, that at the points preferentially rapid lining wear in the area of the sci-pull Wear regardless of the brickwork opposite the fresh wall nozzle gas a protective fluid medium in the melt on problems. This forage wear is initiated towards this will be able to trace back to the fact that the 2. The method according to claim 1, characterized by the influence of the opposite indicates that the unierlie nozzle axis cingcblasencn oxygen in the extension of the 15 side wall nozzles lying zone of the converter chuck. The chuck wear is in individual cases of is acted upon with the protective medium. the kinetic energy of the injected acid 3. The method according to claim 1 odei 2, characterized in the substance and the nozzle section 111 of the horizontal marked, that the protective medium is hanging on the side. With in relation to the Koiiverterdichmesser offset in relation to the fresh gas blown in ao in a horizontal plane inclined laterally anucorJ-is. nten nozzles is the distance between the nozzle 4. Process according to one or more of the top and the opposite Mayan claims 1 to 3, characterized in that ringer than with a nozzle whose longitudinal axis with the the fresh gas in the melt collapses due to the protective converter diameter. As a result medium is deflected. this also results in a correspondingly higher 5. Procedure according to one or more of the wear. Angled in the above manner, for example claims 1 to 4, characterized in that oxygen is blown into the melt at an angle of approximately K) with respect to pure nozzles surrounding the converter diameter, surrounded by a protective medium. _{but s} i _c h to influence the bath movement and 6. The method according to one or more of the 30 of the fresh course has proven particularly successful.
Claims 1 to 5, characterized in that the stronger lining wear is not conducted in the area of the masonry lying opposite the brickwork that leads the protective medium diametrically to the fresh gas. _{only to} a lower converter durability, but 7. The method according to one or more of the also to undesired influencing of the Claims 1 to 5, characterized in that 35 baths induced by the injected oxygen Protective medium at right angles to the movement. This can lead to unpleasant fresh bath gas is initiated. vibrations or to form a wave and 8. Procedure according to one or more of the dreaded expectoration.
Claims 1 to 7, characterized in that the invention is now based on the object of ken the pressure and / or the amount of protection against the aforementioned lining wear and / or the fresh gas as a function of and at the same time a possibility of influencing the bath movement be changed. _sun g of bath movement. The solution is 9. The method according to claim, characterized ge scr object is that at the beginning it is indicated that the fresh gas and / or the mentioned method at the points preferred Ver-S-: protective medium with the frequency of the bath speed ₄₅ wear according to the invention regardless of the supply, but with the opposite phase, fresh gas will blow a fluid Schulzmcilium into the melt. is introduced or blown in. The gaseous one or liquid protection medium. for example gaseous hydrocarbons such as natural gas, propane and 50 butane, or liquid hydrocarbons such as petroleum, Hot / oil and light oil, either can be the most vulnerable Shield nozzles-free uterine areas directly The invention relates to a method for and / or due to its kinetic energy the reduction the wear of the forage during convergence and the path of the oxygen siren (s) learn into which to refine metals, preferably 55 affect. From pig iron, through side wall _{nozzles below <Ι «τ | j c} j _t i _cm cr according to the method, vv> r- Bathroom surface fresh gas, in particular sauce, preferably clic in the extension of the diiseii axis the melt is blown in. lying zone of the converter with the guardian Recently, the freshness has impacted through in the medium. This can either be done by means of single converter masonry arranged nozzles let Schulzmediimis blow through the convector, Senem oxygen increasingly in importance, for example, due to a porous mat located there won. It is also suggested to use material or direct assistance from the endangered de, i. the fresh gas or the oxygen happen through in the feeding zones. Nozzles arranged on the side wall of the converter Another or additional option for cinzublascn. In order to keep the masonry wear caused by the blowing in of rci-S ₅ reduction of the full pre-wear into the nozzle-free, oxygen-induced masonry wear within tolerable limits, however, the masonry zones are already offset by the protective medium using nozzles made of two concentric nozzles laterally offset in relation to the Fiiseli ^ a nozzles