SU1675368A1 - Device for refining molten metal with sheathed reagents - Google Patents

Abstract

The invention relates to the field of metallurgy and can be used for modifying, deoxidizing, doping and refining liquid metal with reagents in a protective transport shell. The purpose of the invention is to increase the reliability of the input of reagents, reduce the consumption and cost of materials. The device includes a rammer 7, from which the tape 6 enters the forming cage 11, a system of hoppers 3 dispensing reagents into the formed U-shaped profile, the forming cage 12 and a calibrated stand 13 hinged relative to it, where the profile takes on the technologically necessary form , directing the rod 17, on the end section of which the cutter 19 is installed for the slag rabbi and the tank 1 for the melt, into which the finally formed shell with the reactants enters. 1 h. apt. 6 Il. fe

Description

The invention relates to metallurgy and can be used for modifying, deoxidizing, doping and refining a liquid metal.

The purpose of the invention is to increase the reliability of the input of reagents, reducing the consumption and cost of materials.

FIG. 1 shows schematically the proposed device, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 - formed U-shaped profile; FIG. 4 shows a profile filled with a reagent; in fig. 5 - pipe billet; in fig. 6 - the final (technologically necessary) shell profile.

The device contains a tank 1 for the melt, mounted on the turret 2 of the metering system 3, consisting of bunkers 4 with

protective.: ohm 5, means for manufacturing a protective transport sheath 6, including. a deflector 7 with a take-up roller 8, a molding mill / including charters, ... are on frames 9 and 10, respectively, forming stands 11 and 12, and a calibration stand 13, installed by means of a hinge 14, a cam mechanism 15 and a worm drive 16 tilting the guide rod 17 with rolling rollers 18, at the end of which a cutter 19 is fixed. The device also contains support rollers 20, a hinge 21, an electromechanical group drive 22 of the forming and calibrating stands,a control panel 23 and guide rollers 24. In addition, liquid metaplates 25, slag cover 26 and reagent casing 27 are indicated.

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The device works as follows

From the unwinder 7, the tape, the tension of which is provided by the roller 8, enters the guide rollers 24, where it is centered and set into the forming stand 11, controlled by a group electrotechnical drive 22 from the panel 23. In the stand 11, a U-shaped profile is formed from the tape (Fig. 3). The formed profile comes under the dispenser 3, which represents a system of bins 4 filled with unlike reagents (powder additives, for example, ground SICa with a fraction of 0.4 mm - 85%, 0.4 - 1 mm - 15%, can be used as reagents , granulated, for example granulated FeSl (fraction of 0.25 mm), as well as lump materials crushed to a fraction of 0-3 mm) and mounted on the turret 2, Dispenser 3 through the protective cover 5 is used to fill modifiers into the formed U-shaped profile. The dosing of the reagent upon entry into the melt is controlled by measuring the mass of the reagent being loaded and the length of the finally formed shell. The U-shaped profile with the filler enters the second molding section of the stands 12, where the profile is closed and the tubular billet is formed (Fig. 5).

After that, the profile with the filler enters the calibration stand 13, where it acquires the necessary shape (for example, the rectangle shown in Fig. 6, where a and b are the lower and upper shelves of the profile, respectively). The finally formed profile enters the guide rod 17. After exiting the guide rod, the front end of the shell with the filler is flattened. The filled-in casing prepared for insertion is bent by tilting the movable frame 10 using an eccentric mechanism 15, the final bending of the reagent casing is achieved by turning the worm gear 16 tilting the guide rod 17 to the technologically necessary angle for the task to melt. In this case, the tension presses the upper shelf of the profile a to the lower shelf in, which provides additional stability of the reagent for the task in the bucket.

Position III (Fig. 1) of the guide rod corresponds to the optimum angle of the shell entry into the melt, equal to 90 °. If the metallurgical capacity has hardened slag cover by tilting the moving frame, and with it the guide rod successively to position II, III and IV, and so on (Fig. 1), the slag is broken by cutting with the cutter 19 and setting the guide rod to optimum the direction relative to the ladle, the shell is introduced into the melt.

The proposed device allows to obtain technologically necessary shape and size of the shell section. The change in the profile of the casing is carried out by replacing the working tool — profile rolls. The final shell profile is determined from the input technology conditions (into the ladle, tundish, mold, etc.), and also depending on the location of the melt vessel, the angle of entry, the bend radius at the inlet, and so on.

Thus, the use of the proposed device in comparison with the known allows to increase the reliability of the input of reagents, to reduce the consumption and cost of materials.

Claims (2)

1. A device for refining liquid metal with reagents in a protective transport shell containing a container for the melt, a system of bunkers, a tape unwinder fixed on the frames of the forming and calibration sections of the stands, which directs the shell to be introduced into the melt, characterized in that In order to increase the reliability of the input of reagents, reduce the consumption and cost of materials, the device is equipped with a tilt drive (swing) guide, and the calibration section of the stands is hinged relative to the forms stands paid-sections. 2. The device according to claim 1, characterized in that a cutter is mounted on the end portion of the guide. mx K Z6 27 19 Fig1 Type A / / L. / FIG. 2 27 U Fig.Z Fig.b ®ig5 Fig.b