SU601314A1 - Tuyere for blowing melt with pulsed streams - Google Patents

Description

The invention relates to the field of metallurgy, and more specifically to the designs of tuyeres for blowing melts. The known design of a tuyere for the production of a liquid metal, which is equipped with a rotamipom with a gas passage, has jet nozzles located in the oxygen TpaiKTe tuyere with a gap to the inner surface of the tuyere head 1. The disadvantage of this technical solution lies in the great resistance of the rotor to gas flow, the complexity of the rotor is complicated, and the rotor has a large flow resistance. centering. the instability of his vrash, eni and the work of ODN1IM with saplom, which causes the occurrence of significant random tuyere vibrations and reduces the scavenging efficiency. The invention is technically closest to the achieved result and is the closest tuyere for blowing liquid metal, it is attached to a rotor having a shaped opening and an impeller, above which a disk with guide nozzles is mounted. The shaped hole, made at an angle of inclination of the tuyere nozzles, coincides with their continuation 2. The disadvantages of the known tuyere include: high resistance of the rotor to the gas flowing through the path, complexity of the rotor and tuyere, reduction of blowing intensity due to the operation of the tuyere only one nozzle. The purpose of this technical solution is to increase the efficiency of blowdown and simplify the design of trucks, we. The goal is achieved by the fact that the rotor is made in the form of a washer, equipped with a crosspiece, having an inclined surface and alternately overlapping part of a row of located nozzles of the head, ensuring the rotation of the washer under the influence of the flowing gas. The washer is equipped with a centrifugal regulator CKODOCTH of its rotation, made, in the form of a shield, recessed into the groove on the inclined surface of the jumper. In addition, the lance is hinged in the carriage, for example using a spherical bearing. FIG. Figure 1 shows a lance with a central gas supply, general view; in fig. 2 - tuyere head, vertical section; pas figs. 3 shows an embodiment of a tuyere head with gas supply along the middle path; on phpg. 4 - a washer, for example for a tuyere with a central gas supply and a four-nozzle head; in fig. 5 - installation of a centrifugal regulator in the slot of the washer, general view; in fig. 6 is a section A-A of FIG. 5. Ф} Рма / consists of: Concentric located tubes forming 2 dl tracts

cooler, gas supplying tract 3, -multisox. FLAN head 4, fitted with a washer 5, placed on the upper thorium 6 of the head (i.e., at the lower end of the gas supplying tract). The washer rests on a fixed-back groove 7 of the support borer 8, and from above it is bounded by a ring, a fairing 9 attached to the surface of the pipe forming the gas supplying Tipa.KT.

Washer 5 luket. Airway cut W, on the area is much larger than the lemeychka and. The upper end surface 12 of the jumper // is made with an IB-type adhesive surface, which ensures the rotation of the washer during gas flow. The fastening of lances 1 in the louver 13 is hinged, for example, with HELP AND spherical 1VTU | 14, fastened with a lining on: the tuyere, and lolubtulok / 5. A variant of fastening the tuyere through spherical supports: To rolling.

The washer 5 is provided with a detrobecan regulator 16 sk, a sprout of its rotation, an iB-shaped pin of the pin 17, placed with the possibility of displacement under the action of centrifugal, and an elastic force IB of the groove 18 of the naklonoy surface 12 of the jumper 11, which is delicate T | Yaga, mi 19, forming a four-eVeND with a flap, and an elastic element 20,. You. Complete HNYN1M, eg. (In the idea of the coil spring and the adjusting screw 21. The flap travel is grafted with end stops 22 and 2S.

The design of the elastic element and its connection in the four-element can be different, for example, in the form of a flat or spiral spring, fixed with a 1K swivel bar of J9. The adjusting screw must be accessible through the nozzle 24. Of the head 4 in order to be able to be adjusted without dismantling it.

The proposed device operates as follows.

Under the influence of gas flowing around the end surface 12 of the tongue 11, the clamp 5 is rotated.

When the puck 5 attains the technical numbers specified by the technical process of melting -Apt small numbers; Borot's flap / 7lud by the action of centrifugal forces, lateral paints, the adjustable resistance of the elastic element 20,. Moves the slot and protrudes from it, shields on the surface 12, preventing further acceleration washers. When thinking about the revolutions of the plate, centrifugal forces are reduced, and the flap iodine is buried by the action of elastic forces in the groove 18, -the efficiency of the flow around the gas is inclined surface 12 jumpers and, accordingly, the revs of the washer 5. By adjusting the elastic element at € 1 on 1 p stub strong, corresponding to optimum, revs of the washer, determining the cyclic pulsation of the jets and THEIR movement over the melt. When the shchiba 5 is rotated, jumper 11 is n-consecutive. It blocks the access of gas to one or part of a row of located nozzles (without depriving it of iK access to the rest of the nozzles) and provides circular pulsation of gas jets.

With the symmetric arrangement of the jumper // on the 5 LR plate, its rotation by the centrifugal regulator 16 ensures only the necessary (predetermined) pulsation of the gas jets.

With an asymmetrical arrangement of the jumper; ki 11, blocking the access of gas in succession to one or several adjacent nozzles (—for example, to one of four l — for “two or three out of six to eight so.iyl fumes.”) mu (8 -.- 25 °) to the location of the nozzles to the longitudinal axis of the 1m1ccc 1 tuyere, (Occurs (the resulting force of the reactions of the streams flowing from the nozzles deflecting the tuyere from the vertical position.

The rotation of the washer 5 s-o. Corresponds to the solution of the resultant force of gas jet reactions, and its tuyere (the impact above the melt trajectory along the BipXiHocT .H is close to conical, and its head 4 is a closed curve close to the circumference.

The proposed device of the vines will perform a pulsed blow with a max. Intensity of purging, ensure that the pulsation is combined with the cyclicality with the movement of reactive housings in the melt with a given technology of flaccio, ensure the displacement of the head of the fur with an alloy without using special drives, significantly distribute the blast, reduce wear and tear on the foot.

Claims (3)

1. A purse for pulping the melt with pulsed jets, fixed with an IB carriage, comprising concentric tubes that form paths for the cooler and gas reagent, a molyoglospalovuyu head with nozzles and at an angle to the longitudinal axis of the tuyere, and a rotor, In the gas supply to the adapter (Kte, characterized in that, in order to increase the efficiency of production and simplify the conT | p) of the tuyere, the rotor is made in the form of a jumper with the jumper, which has a hinge; installed with the -to-m-alternate overlap of one Is part RYA.DOM rayup-olozhen.nyh nozzles. 2. A fuse for blowing the melt with a pulsed jet m. (FI l. 1, characterized in that the washer 1 is supplied with a centrifugal rotation speed regulator, made in the form of a shield, broken with the possibility of movement under the action of centrifugal and adjustable 1 elastic forces Laze (Inclined Paverl-awn jumper. 3. A lance for purging the melt of pulsed CTpiyHiMH in pl. 1 and 2, characterized in that it is fixed in the carriage by means of a spherical floating bearing. The sources of information taken into consideration during the examination. 5 1. The authors of the USSR, L. 274790, cl. C 21 C 5/48, 1968. 2. Author's certificate of the USSR. La 298659, cl. C 21 C 5/48, 1968, .9 I - 5 //, 3 15  , Rts four /. five