SU1199804A1 - Device for gun-concreting and supplying oxygen to converter - Google Patents

Abstract

1. A DEVICE FOR TORQUIDING AND SUPPLY OF OXYGEN INTO A CONVERTER, containing the installed .c: lifting mechanism carriage, a collector with fixed bodies, a tuyere and a tuyere rotation mechanism, characterized in that, in order to increase the period and j accelerate the replacement of the heated tuyere, the collector is equipped with a distributor made in the form of a hollow cshnd-, pa, divided into separate chambers with nozzles, and the lance is equipped with mating nozzles connected to the distributor nozzles by detachable connections. 2 | The device according to claim 1, wherein the connection of the distributor nozzles and tuyeres is provided with elastic inserts, and the tuyere rotation mechanism is the carrier that connects the tuyere with the distributor.

Description

with

QD 00

t 11

The invention relates to ferrous metallurgy, in particular to the equipment of converter shops.

The purpose of the invention is to increase the service life and speed up the replacement of the burnt tuyere.

FIG. 1 shows the device, general view | in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section in FIG. one; in fig. 5 is a section of YYD in FIG. one; in fig. 6 is a variant of the oxygen supply device j in FIG. 7 is a section d-d in fig. 6f in FIG. 8 is a section E-E of FIG. 6; in fig. 9 is a section in MF in FIG. 6; in fig. 10 shows section 3-3 in FIG. B.

The device consists of a collector 1 and a tuyere 2. A collector includes bodies 3-5, a distributor 6, seals 7 and 8, clamps 9 and 10, a bearing 11, body 3-5 are rigidly fixed on the carriage 12 of the tuyere lifting mechanism and using nipples 13-16 are connected with flexible sleeves, which supply all components necessary for its operation to the tuyere. The distributor b is made in the form of two coaxial tubes 7 and 18, the gap between them is divided into three vertical chambers 19-21, which are the paths for cooling water and oxygen. The central tube 18 is a path for supplying the gunning mass in a jet of compressed air. The chambers, 19-21, have openings 22. At the top of the distributor 6 there is a support flange 23, with which the distributor rests on the carriage 12 through the bearing 11. The distributor is mounted inside the housing 3-5 and can be rotated to form annular cavities 24-26 communicating through the openings 22 with cameras 19-21. The central distributor tube directly communicates with the cavity 27 of the housing 3. In the lower part of the distributor, chambers 19,20 and 21 are provided with corresponding connections 28.29 and 30, through which chambers 19-21 are connected to the paths of the corresponding components in the tuyere. The need for sealing cavities, which are under pressure from water, oxygen and shotcrete, is provided by seals 7 and 8 and covers 9 and 10.

The lance 2 consists of concentrically arranged pipes 31-34, forming 98042

cooling water, oxygen and gunning mass, as well as tip 35 with nozzles 36 and 37, forming a nozzle through which

, the gunning mass in the compressed air jet and oxygen are directed from the tuyere to the inner surface of the converter lining. The tuyere is mounted in the supports 38 of the carriage 12. A drum 39 is fixed on the outer tube 34 of the tuyere, connected to the drive of the tuyere rotation mechanism by means of a cable transmission.

Possible rotation of the tuyere

5 gears. Then, instead of a drum, a gear is attached to the gunning tuyere, which mates with the gear of the tuyere rotation mechanism. In the upper part of the tuyere there are nozzles 40-42, each of which has a joint with a corresponding annular cavity between the pipes 31-34. Using these nozzles, the annular cavities of the tuyere are connected;

25 corresponding chambers 19-21 in the manifold distributor. To compensate for the difference in thermal elongation of the tube 31-34 at the top of the:

 These have a movable joint with seals that ensure the tightness of the cavities between these pipes. Since it is almost impossible to carry out direct soy, zinchening between themselves the nozzles 28-30 of the collector with the same pipes 40-42 tuyeres due to manufacturing error (the discrepancy between the ends of the screwdriver nozzles in height, their misalignment, etc.), these nozzles are interconnected through intermediate elastic inserts 43 in the form of flexible hoses or bellows by means of a flange connection 44; The central pipes of the tuyere collector are also interconnected by an elastic insert. In order to transfer the torque from the tuyere to the distributor, both these nodes are interconnected by the carrier 45.

 for purging the converter with oxygen, it resembles a tuyere for flare gunning. The difference lies in the fact that it lacks tracts and nozzles for gunning mass. Collector 46

55 has two housings 47 and 48, a distributor 49 has two chambers 50 and 51, which communicate with the chambers, housings. 48, and the actual lance 52 is provided with a tip 53 and nozzles 54 for oxygen. Acid rods are fed through the central pipe collector and the actual tuyere, cooling water is fed through the remaining paths. Like the gunning gun, the purge gun is equipped with elastic inserts and carrier. The operation of the device during the shotcrete of the converter occurs as follows. The subsequent gunning of the converter lining provided by the technology is carried out after the metal has been drained and the converter has been installed in a vertical position. Simultaneously with the installation of the tuyere above the converter, the water supply for its cooling is switched on. By turning on the lifting mechanism, the tuyere fixed in the carriage 12 is lowered into the converter to the mark where the predetermined lining site is located that needs repair. Simultaneously with the stop of the tuyere in a given vertical position, the position of the sprayed mass and oxygen is turned on. Cooling, water, oxygen and gunning mass in a jet of compressed air are supplied to the tuyere by flexible sleeves connected to the corresponding nozzles 13-16, to the central tube of the dispenser 18 and through the openings 22 to the chamber 19-21 , elastic inserts 43 and counter pipes 40-42 - into the central pipe 31 of the shotcrete tuyeres and annular gaps between the pipes 31-34. Gunite mass transported around. compressed air, and oxygen through nozzles 36 and 37 enters the converter. At the exit from the nozzle, the coal dust entering into the composition of the gunning mass ignites from the high temperature in the converter and in the oxygen jet creates a temperature of 2500 ° C at which the magnesite, the main component of the gunning mass, melts. Molten magnesite is transferred to the inner wall of the converter by the slatted air, and the destroyed lining places are fixed. Since the nozzles in the tip 35 are vertically arranged only in one row, it is necessary to rotate the fan one way or the other side depending on the location of the defective places of the lining in order to restore the destroyed lining. To repair the lining anywhere in the horizontal cross section of the converter, this rotation must be provided in the range of 0-360 ° С. The tuyere is rotated by rotating the drum 39 or a gear, if the rotation of the tuyere is done by gear. During the rotation of the gunning lance drove 45 turns the valve 6 relative to the fixed buildings 3-5. Together with the distributor, the nozzles 28-30 and 40-42 are rotated. Thus, all components are supplied to the rotating part. shotcrete lance with non-rotating under-. waters (nozzles 13-16 and flexible hoses supplied to the NS). Depending on the shape and size of the lining flare, flare gunning can be carried out by rotating the shotcrete, its vertical movement, or one and the other, simultaneously. After the shotcrete has been drilled, the tuyere is removed from the converter and the supply of the sprayed mass is turned off. oxygen and cooling water. The operation of the rotating tuyere units during the purging of the converter with oxygen is carried out in a similar way. Oxygen is supplied through the central collector pipe and the actual tuyere, which is supplied through nozzles 54 to the. converter to the mirror of metal. The fastening of the purge tuyere to the carriage 12 of the lifting mechanism and its rotation are carried out as in a shotcrete. After the end of the melt and the rise of the blowing lance, the supply of oxygen and cooling water is stopped. Execution of the device — from two nodes, easily separated from one another — greatly simplifies and. facilitates the operation of replacing an outdated shotcrete tuyere. To do this, it is sufficient to separate the flanges connecting the two nodes to each other. At the same time, the collector elements are not damaged, which significantly increases the service life of the tuyere as a whole.

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Claims (2)

1. DEVICE FOR TORCRETING AND SUBMITTING OXYGEN TO THE CONVERTER, containing a collector installed in the carriage of the lifting mechanism with fixed tuyere bodies and the tuyere rotation mechanism, with the aim of increasing the service life and j accelerating the replacement of a burnt-out tuyere, the collector is equipped with a distributor made in a hollow cylinder divided into separate chambers with nozzles, and the tuyere is equipped with reciprocal nozzles connected to the distributor nozzles • detachable connections. 2, The device according to claim 1, with the proviso that the connections of the distributor pipes and the tuyeres are equipped with elastic inserts, and the tuyere rotation mechanism has a carrier connecting the tuyere to the distributor. black cut A-A cut B-B cut 5 - section 6 - option