RU2489370C1 - Apparatus for processing molten slag - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to metallurgical industry and can be used in processing metallurgical slag. In the apparatus, a container for receiving molten slag is placed on a swing support such that it can turn about the swing support in either direction by 20-45°, and the bottom of the container is partially perforated, wherein the part lying on the side of feeding the melt is continuous and perforated on the opposite side, wherein the size of the flow section of the holes in the perforated part of the bottom does not exceed the diameter of a ball placed in the container.

EFFECT: invention increases efficiency and reliability of the device, as well as quality of the product.

6 cl, 2 dwg

Description

The invention relates to the metallurgical industry and can be used in the processing of metallurgical slag.

A known method and installation for the processing of metallurgical slag, where cooling, particle size and particle shape of the finished product is carried out on a layer of moving metal balls inside a rotating container, which also serves water / 1 /, and the installation for implementing this method includes a casting gutter, grate a drum with balls and a device for additional cooling of the slag, while the melt is poured into the grate drum through a central axial hole, and the device for additional cooling is made a moving perforated screen in the closed cells mounted with the possibility of periodic immersion in water.

The disadvantage of this method is that the entire volume of water used is supplied to the grate drum from where it enters the aftercooler, which impairs the quality of the slag product, and the disadvantage of the installation itself is that pouring the melt into the drum with balls through the central axial hole causes the trough it is quickly overgrown with chilled slag and further advancement of the slag melt, especially high viscosity, is difficult and this reduces the productivity of the installation. In addition, the presence in the device for additional cooling of slag of the finished product of water leads to overgrowth of particles of slag coming out of the grate drum due to the effect of thermal crushing, while up to 80% of all production is a fraction of less than 3 mm, which limits its scope.

A known installation, including a drum rotating around a horizontal axis, filled with metal balls, the generatrix of which is assembled from separate sections, hinged to the rods, fastening the opposite walls of the drum and a aftercooler in the form of a bath with water / 2 /.

The disadvantage of the installation is the lack of parameters for the ball loading of the drum, which ensures reliable suspension of the grates between the rods of the drum with possible jamming, as well as the distribution of the total volume of water for processing slag outside the drum. In addition, the use of a bath with water for post-cooling of the finished product leads to overgrinding of the product.

A known method of producing granules of solid inorganic substances from melts, comprising cooling the melt in a stationary form, where metal bodies are placed before being filled with the melt and separated after cooling from the hardened material, while the metal bodies are separated from the hardened material by magnetic separation / 3 - prototype/.

The disadvantage of this method is the inability to control the cooling rate of the material in a stationary (fixed) form, and the absence of additional cooling of the material leads to a decrease in the productivity of the process. In addition, the separation of metal bodies from the hardened material using magnetic separation is a labor-intensive, low-productivity process, while the schematic diagram of the installation and its design features are not shown.

The purpose of the invention is to increase the productivity of the device, its reliability and product quality. This goal is achieved by the fact that in a device for processing slag melts, including a receiving tank of slag melt filled with balls, which is placed on a hinged support with the possibility of rotation relative to the support in either direction by 20-45 °. and the bottom of the container is partially perforated, while its part located on the melt supply side is continuous and perforated on the opposite side, and the size of the bore of the holes in the perforated part of the bottom is smaller than the diameter of the ball placed in the container, a water supply system for cooling the balls is also provided and slag. The support is shifted relative to the center of the bottom of the slag receiving tank towards the melt supply, and the slag receiving tank is equipped with a rotation drive relative to the axis of the hinged support. In addition, the device is equipped with two or more tanks for receiving slag melt on a common hinge support, while it is equipped with a melt distributor located above the tanks with balls, and the drive is configured to rotate tanks for receiving slag melt in antiphase.

Figure 1 shows a schematic diagram of a device. The basis of the device is a container 2, which is equipped with a rotation drive relative to the axis of the hinge support 4. The hinge support 4 provides the ability to rotate the capacity of the relative horizontal position in either direction by 20-45 °. The hinge support 4 can be made with an offset relative to the center of the bottom of the receiving tank of the slag melt towards the supply of the melt.

The container along the entire length is divided into two parts: one, located on the side of the slag outlet, has a continuous bottom, the other, located on the side of removing slag particles from the tank, is perforated.

The part of the vessel located on the melt supply line for processing is freely filled with metal balls 3, while the size of the holes of the perforated part of the vessel is less than the diameter of the ball.

The ball nozzle is designed to take heat from the melt, it affects the formation of the phase composition and its particle size distribution. The device operates as follows.

Before the release of slag from the furnace 1, the container 2 with balls 3 is installed in an inclined position towards the discharge of slag from the furnace 1, while the balls 3 are concentrated in the solid part of the container.

When slag is discharged from the furnace, the slag melt enters the surface of the balls, penetrates the inter-ball space, fills it, takes the form of an inter-ball space, and cools.

After the process of cooling the slag in the inter-ball space is completed, the container 2 is rotated in the opposite direction and the balls 3 together with the slag are mixed into the perforated part of the container, while the particles of slag 7 fall through the holes, and the balls 3 remain in the container 2.

By turning the container 2 to the side to the furnace 1, the balls 3 are rolled in the same direction and the process is repeated.

Figure 2 shows a schematic diagram of a device equipped with two tanks for receiving slag melt on a common articulated support. Tanks 2 are located on a single articulated support 4 and are equipped with independent rotation drives relative to the axis of the articulated support with the possibility of rotation of the tanks for receiving slag melt. The hinge support 4 is made with an offset relative to the center of the bottom of the two tanks for receiving slag melt in the direction of supply of the melt. A distributor 5 is located above the containers. The slag melt is drained from the furnace and, using the distributor 5, is fed alternately first to the first container and then to the second. The rotation of the tanks receiving the slag melt can be carried out in antiphase. In this case, the first tank starts a cycle of swings until the slag is completely or partially unloaded and returns to its original position, then the cycle repeats the second tank.

In the process of releasing the tank from the slag, it enters the conveyor 6, where, if necessary, additional cooling of the slag by water is carried out.

The advantage of the proposed device is the simplicity of its design, high productivity, melt reception with any, time-varying intensity of its release from the furnace, the formation of slag products with a predetermined fractional and phase composition.

Literature

1. Patent No. 2018494, cl. C04B 5/02 1992.

2. Patent No. 2099298, cl. C04B 5/02.

3. Copyright certificate No. 384205, mkl. B01J 2/02, B02C 19/02.

Claims (6)

1. A device for processing slag melts, including the capacity for receiving slag melt filled with balls, a system for supplying water for cooling balls and slag, characterized in that the capacity for receiving slag melt is placed on a hinge support with the possibility of rotation relative to the hinge support in either direction 20-45 °, and the bottom of the container is partially perforated, while its part located on the melt supply side is continuous, and on the opposite side it is perforated, and the size of the passage section of the holes in the perforation th e bottom portion does not exceed the diameter of the ball placed in the container. 2. The device according to claim 1, characterized in that the hinge bearing is offset relative to the center of the bottom of the receiving vessel of the slag melt in the direction of supply of the melt. 3. The device according to claim 1, characterized in that the receiving capacity of the slag melt is equipped with a rotation drive relative to the axis of the articulated support. 4. The device according to claim 1, characterized in that it is equipped with two or more containers for receiving slag melt on a common articulated support. 5. The device according to claim 1, characterized in that it is equipped with a melt dispenser located above the reception tanks of the slag melt. 6. The device according to claim 3, characterized in that the drive is configured to rotate the reception tanks of the slag melt in antiphase.