SU415311A1 - - Google Patents

Description

one

The invention relates to the field of the production of metals and alloys by a jet refining method and can be applied in ferrous metallurgy in the refining of pig iron doped with a cement component, for example vanadium.

The valuable alloying components of cast iron (wahiadium, niobium) are oxidized and converted into slag, which is then separated from the metal (intermediate product) obtained by oxidative smelting.

Devices for the continuous refining of 1 metals are known, consisting of an intermediate ladle, a crushing tuyere mounted on a reaction and withdrawal gaseous reaction products from a receiving ladle with drain holes in the side part and in the bottom.

However, in the known devices, it is not possible to separate during the process of refining heterogeneous, for example vanadium, SCOiB. In order to download slag, it is necessary to stop the process and thereby reduce the efficiency of the installation. In addition to this, the loading of heterogenous slags is performed by combining, which leads to a low coefficient of slag removal.

In addition, the continuity of the process is possible only in the presence of a continuous metal casting plant, since the metal accumulates only 3 in one bucket.

Slag in the process of refining constantly interacts with the lining.

Owing to the removal of gaseous reaction products in the upper part of the reaction chamber, the oxidative ability to blow decreases (mixing oxygen or another gas with the reaction products).

Metal droplets pass through the slag layer, which creates more favorable conditions for increasing the metal inclusions in the slag (especially heterogeneous).

For the purpose of more effective separation

slag from the metal and their continuous removal in the proposed device, the receiving bucket is equipped with a lined bushing installed in a slinny hole) 1 and in the bottom of the bucket and protruding into the bucket working space

to a height equal to I -1.2 of the height of the metal outlet, and a rotation mechanism around the vertical axis.

In order to reduce the load on the sleeve in the api-sy device, it is made conical with an eyeglass toward the bottom under the fragility of 10--30 °.

In order to increase productivity

Installation of the tundish is made in

the shape of a torus with two or more drain holes in the bottom located at equal distances from each other. .

In order to increase the efficiency of the use of oxidizing gas, the proposed device is equipped with a gas suction nozzle, which is arranged inside the ladle coaxially with it.

To maintain a certain level of metal in the receiving bucket and the possibility of more complete removal of the metal in the device under examination, the drain holes in the side of the bucket are directed upwards at an angle of 45-60 °.

In order to ensure the continuous discharge of metal into the bottling buckets, the proposed device is equipped with a flip ellipsoid mounted around the container under the side openings in the wall of the bucket.

FIG. 1 shows the described device; in fig. 2 - inclined chute.

The device for continuous interfacing of metal and alloys consists of an intermediate one made in the form of a torus with several openings 2 for metal discharge, grinding devices 3, a reaction chamber 4 with a branch pipe 5 for evacuating the gaseous reaction products (ensuring more efficient use of oxygen compared to the lateral outlet), rotating the receiving bucket 6 with a conical sleeve 7 extending into the side of the bottom at an angle of 10-30 ° and protruding into the working space of the bucket to a height equal to I -1.2 of the height of the hole for discharging metal for continuous discharging of slag in the center of the ladle and side openings for continuous discharging of metal, ellipsoidal trench 8 with two taps for draining the outgoing metal into the casting buckets 5 and / (9 and the slag bowl //. The reaction chambers in the trough are located under the width of 45-60 ° to the axis of rotation of the receiving bucket.

The device works as follows.

The metal to be refined is poured into the tundish 1. From it, the metal enters the crushing devices 3, where the oxygen flow breaks it up into droplets falling into the rotating receiving shed, in which, due to the difference in density, sclac is separated from the metal. Slag due to a lower specific weight accumulates in the center of the receiving bucket and is continuously removed through the opening of the sleeve 7 into the slag bowl 11. The metal from the receiving bucket 6 through the side openings is continuously drained into the bucket 9 along the ellipsoidal inclined chute 8. When filling the casting bucket R, the chute turns around its horizontal axis and fills the casting bucket 10. At this time, the bucket 5 is replaced with an empty bucket. The rate of slag and metal output is controlled by the angular velocity of rotation of the receiving bucket b. The gaseous reaction products are discharged through the lined nozzle 5 in the center of the reaction chamber 4. Their movement is indicated in FIG. 1 dashed arrows. In addition, the nozzle 5 prevents metal from entering the slag opening.

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Claims (6)

1. A device for continuous refining of metals, consisting of a tundish, crushing tuyere, installed on the reaction chamber with the removal of gaseous reaction products from the receiving bucket with SLI-OVAL holes in the side and bottom, characterized in that, in order to more effectively separate the slak from the metal and continuously remove them, the receiving bucket is provided with a lined bushing installed in the drain hole at the bottom of the rag and protruding into the working space of the bucket by a pa height equal to 1 -1.2 the height of the hole for metal release, and a rotation mechanism around the ve, rotary axis. 2. The device according to claim 1, characterized in that, in order to reduce the load on the sleeve, it is made conical with expansion in bottom side at an angle of 10-30 °. 3. The device according to claim 1, characterized in that, in order to increase the productivity of the installation, the intermediate bucket is made in the form of a torus with two or more drain holes in the bottom, located at equal distances from each other. 4. Device on PP. 1 and 3, characterized in that, in order to increase the efficiency of the use of the oxidizing gas, it equipped with a gas suction nozzle installed inside the bucket coaxial to it. 5. The device according to claim 1, characterized in that, in order to maintain a certain level of metal in the receiving bucket and the possibility more complete removal of metal, the drain holes in the side of the bucket are directed upwards at an angle of 45-60 °. 6. The device according to paragraphs. 1 and 3, characterized in that, in order to ensure continuous the drain; and the metal into the bottling buckets, it is provided with a reversible ellipsoidal chute mounted around the container under the side openings in the wall of the ladle. A 4I / IAV -7 -four 7 (1 V. /; / ii y / ii ///  /