SU1294831A1 - Arrangement for treating molten metal - Google Patents

Abstract

This invention relates to metallurgy, in particular, to refining, modifying and doping iron-carbon metals and alloys. The purpose of the invention is to increase the effect. assimilation of the reagent. In the working chamber 1, made of two heat pipes 2 and 3, the reagent is placed in solid form, for example calcium, the lid 6 is closed, an inert gas is fed, after which the device is immersed in the melt while simultaneously supplying water through the heat exchanger 11. The inert gas is melted into the camera 1 e Tfb CO with T1 JN ISD with 4 00 o: g l

Description

It is supplied under pressure in the bottom A and does not allow the melt to fill the chamber. The reagent is melted in chamber 1 due to the heat of the melt. By creating gas pressure in line 7, the required rate of extrusion of the liquid reagent through the holes 5 is provided.

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The invention relates to metallurgy, in particular, to refining, modifying and doping iron-carbon metals and alloys.

The aim of the invention is to improve the efficiency of assimilation of the reagent,

In FIG., J a schematic representation of the device assembled; on . FIG. 2 shows a device placed in a metal melt.

A device for treating liquid metals and alloys consists of a working chamber 1 made of 2% heat pipes 2 and 3. A bottom pipe 2. Supplying 4 with exhaust ports 5o. At the top, chamber 1 is supplied with a cover 6 and is connected to highway 7 supply gaz. Condensation zone 8 1g. heat pipe 2 is combined with. by zone 9 of evaporation of the upper heat pipe 3j, its condensation zone 10 is in contact with the heat exchanger 11. A capillary-porous layer 12 is applied on the inner surface of the lower heat pipe 2,

The device works as follows.

The working chamber 1 places the reagent in solid form (for example, calcium pieces) closes the cap b, inert gas is supplied, after which the device is immersed in the melt while simultaneously supplying water through the heat exchanger 11. The device together with the solid reagent placed inside it begins to heat. Before the reagent melts in the working chamber 1, the inert gas is supplied under pressure fi with the melt through the holes 5j made in the bottom 4, and does not allow the melt to fill the working chamber through these holes. The temperature of the heating of the cooling water believe the temperature control inside

in the molten metal. The input rate of the liquid reagent should be equal to the rate of its dissolution in the melt. The device allows to increase the reagent up to 80% during the treatment of iron - carbon alloys - BOB. 2 Il.

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The cavity of the device, i.e. check the reagent temperature. Since the working chamber 1 of the device is made of thermal gases S 2 and 3, when it is amply thermally insulated, it becomes possible to increase or decrease the consumption of cooling water to the required reagent temperature. After the reagent melts in the working chamber due to the heat of the melt, creating gas pressure in the line 7, provide the necessary speed of pressing the liquid reagent through the outlet holes 5, executed, in the bottom 4, into the melt zone, intensively heat the heat transfer device (Fig. 2) .

The flow rate of the liquid reagent must be equal to the rate of dissolution of the reagent in the melt. The device makes it possible to increase up to 80% the digestibility of reagents in the treatment of iron-carbon alloys. When the reagent injection rate exceeds the rate of its dissolution in the melt, intensive evaporation of a part of the reagent introduced and, as a result, its decrease, is possible. assimilated by the melt. The optimum rate of introduction of liquid reagents into the melt is 1.5 g / s for magnesium and 1.2 g / s for calcium. After the liquid reagent is completely consumed (as seen by the change in gas pressure in the device), the gas is blown through the melt until the device is removed from the melt to prevent the melt from entering the working chamber 1 through the holes 5 made in the bottom 4.

When placing the working chamber 1 in the melt, the following occurs.

Through the heat supplying wall of the heat pipe 2, the heat flux goes to the capillary-porous layer 12,

located on its inner surface and impregnated with a working substance — a metal coolant, for example, a eutectic sodium-potassium alloy, as a result of which the coolant begins to evaporate and its vapors move from the evaporation zone (which is part of the lower heat pipe 2) to the zone 8 condensation contacting the evaporation zone 9 of the upper heat pipe 3. The upper heat pipe of the capillary-porous layer may not have, and its evaporation zone may be filled with a metal coolant. or similar to the coolant in the lower heat pipe 2, or different from it. By selecting heat of the latent heat of vaporization (and thereby condensing the vapor of the lower heat pipe 2, which by gravity flows to the point of drying the capillary-porous layer 12 of the lower heat pipe 2), the heat transfer medium of the upper heat pipe 3 evaporates and similarly gives off its latent heat

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to the cooling water evaporation lot of the heat exchanger 11, which the condensation zone 10 of the upper heat pipe 3 contacts. The temperature of the cooling water coming from the heat exchanger of the cooling water is controlled by the temperature coming from the heat exchanger of the cooling water.

Claims (1)

Claim 1 A device for treating liquid metal, containing a working chamber for the reagent with outlet openings in the bottom, sealing the top and gas supply, characterized in that, in order to increase the efficiency of metal assimilation of the reagent, the working chamber is formed by two closed annular heat pipes placed one above the other and having a common partition, the bottom being completed as a continuation of the bottom heat pipe, and the top heat pipe is coupled with a water cooled heat exchanger. Compiled by V. Saramutin Editor N. Egorova Tehred A. Kravchuk Proofreader A. Obruchar 562/27 Circulation 550Subscribe VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4