SU62579A1 - The method of cleaning the lances of converters used in non-ferrous metallurgy - Google Patents

Description

THE WAY OF CLEANING THE FURM OF BESEMEROVSKAYA CONVERTERS USED IN TSVETNOYZ was established on August 8, 1940 for L 34462 I I-Ti; - to the People's Commissariat of Nonferrous Metallurgy of the USSR | BIOLuO | f.

The continuous and successful operation of converters used in non-ferrous metallurgy, for example, in copper-nickel smelters, to a large extent depends on the continuity and uniformity of air flow into the converter bath. Therefore, the reduction of the living section of the tuyeres, feeding the converter with air, and even often the complete overgrowth of several of them with incrustations leads to a lengthening of the bessemerovanie process and, consequently, the rise in price of a ton of metal being processed.

The method of protecting tuyeres from overgrowths by hand-cleaning them manually with a crowbar generally accepted in practice cannot be considered satisfactory, since this method does not ensure the cleanliness of tuyeres, and the degree of effectiveness of the latter depends on attentiveness, honesty and physical endurance of the staff. The method of cleaning the tuyeres with a crowbar itself is partly the reason for their overgrowth, since when the crowbar is removed from the bath, the converter adhering to it is removed by the mouth of the tuyere and remains there, forming the beginning of a new overgrowth of the tuyere. In a finite account, almost all tuyeres work with a living section reduced in varying degrees.

In order to improve the work of the converter from the side of supplying with air, a new method of cleaning the tuyeres is proposed, which consists in pushing the tuyere channel continuously into the converter — or periodically tubular consecutive inserts made in the form of pipe sections of the same material as one that is subject to redistribution in the converter.

At the same time, the front liner, a distance equal to its length, falls into the bath of the converter, making space for the liner next to it, etc. The liner that falls into the bath melts in it.

The drawings show the construction of a tuyere adapted to carry out the inventive method, with fig. 1 is a front view of several tuyeres, partly in section along A-A and B-B in FIG. 2, and FIG. 2 is a cross-sectional view along CC; FIG. one.

An air box 2 of cast steel is screwed onto the housing 1 of the converter, on the bolts welded into this housing.

I.T. Shantgay

METALLURGY; V - :; 7 п

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Yao 62579

It is a thick-walled pipe with a hollow tide 3. A fitting 4a extends from the pipe and connects to the air receiver 4; at one end, the box 2 enters inside the converter 1, where the end sleeve 5 is screwed into it, its other end-external is plugged with valve 6 with the clamp 7. Four tubular inserts 8 are laid in sleeve 5, of which each gradually moves to the outlet under the action of an asterisk 9. Another sprocket // sprocket, mounted on the end of the roller 10, rotating in tidal 3 gland bearings, is connected by a hinged chain with an asterisk 12 to the shaft 13; this shaft, which has a support on the brackets welded to the converter case, receives rotation through a reducer from the electric motor, also fixed on the brackets welded to the converter; Thus, the shaft 13 with its engine when turning the converter follow this last.

Both the air box 2 with its tide, and the shaft 13 with the drive do not go beyond the envelope of the receiver tubes, and, therefore, do not prevent the converter from turning.

The sprocket 12 is seated loosely on the shaft 13 and has one half of the knuckle clutch on it, the second half of which 15, seated on the shaft 13 on the key, can be swapped to the shaft with the help of the lever 14.

Thus, an asterisk //, and through it an asterisk 9 can be included in the work (and off) as desired.

Air box 2 with flanges Tightened bolted to the converter housing. The interior of the pipe, which is the channel for the advancement of the liners, is bored out. The fitting entering the inside of the converter is threaded for screwing the end socket 5 into it. Sealing the connection between valve 6 and box 2 is a lead ring rolled into the box body.

Tide 3 is detachable, provided with hatches covered by cover 16 for periodic cleaning of accumulated chamotte dust. The end sleeve 5 is a tube of heat-resistant steel, bore inside. The fitting A is threaded for connection with a tube nut from the receiver 4.

In this nozzle there is a check valve 17 made of sheet iron, which rotates on an axis, one end of which is discharged through the side wall of the nozzle to the outside and has levers with a contact device to the signaling electric lamps 18, 19 at the end.

In the case of the normal operation of the tuyere, the air flowing in from the receiver, with its pressure, turns the check valve 17 to a vertical position (shown in the drawing by the flat lines). As soon as the lance (in case of discontinuous operation of the liner) begins to grow overgrown (reducing the living area of the air duct), the amount of intake air will begin to decrease, respectively, the pressure on the plate of the control valve 17 will decrease and the latter will begin to leave the vertical position. With the complete or almost complete overgrowth of the tuyere, the check valve 17 strung to a horizontal position (shown by conditional dotted line). But, of course, it is not necessary to bring to this position, for which it is necessary that the contact device switch on the signal light bulb soon after the release of the plate of the control valve 17 from the vertical position.

The signal supplied by the light bulb 18 means that the liner needs to be pushed inward by a certain length, until the lamp is completely extinguished and with some additional reserve.

The bushings 8 are interconnected into the lock by means of special teeth in the ends; side slots in liners serve as conductors of air from the air box 2 to the converter bath; the cuts along the lower liner forming are slots for the teeth of the sprocket 9 to enter; When the sprocket 9 is inserted, the liners move along the pipe at a given speed. Inserts are made of cast from shteyn, processed at this moment by the converter.

Four inserts are placed in box 2. All four are of one form. The fourth liner (from the outer end of the air box) is attached at the moment when the spike 9 tooth enters the last notch of the third liner. At this point, you need to stop the rotation of the asterisk 9, it is best to time the build-up of the liner in the period when the converter will be turned to the next load or eat it.

To increase the fourth liner, the valve 6 opens, by raising the collar 7 into the open box 2, the prepared liner is laid, and with a slight clockwise turn, the front teeth of the liner are closed with the same third liner. In order to make such a turn possible, the last cut at the bottom of the insert is made accordingly to the gap (by the amount of this turn).

Then the valve 6 is again closed and clamped with the clamp 7. The lance is ready for further work.

Subject invention

The method of cleaning the tuyeres of the Bessmer converters used in non-ferrous metallurgy, characterized in that through the tuyere channel in the masonry push continuously or periodically tubular into the converter, consecutive inserts made in the form of pipe sections made of a material undergoing redistribution in the converter .

fig1

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Fig2

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