SU943284A1 - Loading arrangement for blast furnace - Google Patents

Description

(5) DOWNLOAD LOADING DEVICE

one

The invention relates to ferrous metallurgy, and to charging devices of shaft furnaces, and can be used in the construction of unlimited charging devices for blast furnaces.

A blast furnace charging device is known, which contains sluice bins with gas-cut valves and charge valves installed on them, supported on the flanges of the Cl3 base ports. The disadvantage of this device is the need to hang out the bunker when replacing gas-cutting valves and charge valves or installing stoppers for separating charge chambers. repair work on the go blast. ovens.

Closest to the proposed. is a Paul Wurth loading device that contains bunkers with gas cut-off valves and charge gates, supported through support struts on the blast furnace dolls, and guide points for the batch material connected to the neck of the furnace dome by means of an elastic sealing element 21.

The disadvantages of this device are the rigid connection of the supporting posts to the bunkers and the furnace dome, as a result of which, when the dome is heated up, significant bending forces appear in the racks, which can cause damage, and if the dome is unevenly heated, the alignment of the guide for the material the neck of the dome, which can cause the destruction of the sealing element.

Claims (3)

The purpose of the invention is to improve the reliability of the boot device by ensuring the constancy of the relative position in the plan of the bunker and the furnace dome, regardless of the temperature mode of the dome and the nodes of the boot device installed on it. The goal is achieved by the fact that in a loading device containing parallelly arranged bunkers with supporting posts and guideways for the charge material, equipped with elastic sealing elements, each bunker is mounted on the supporting posts with the possibility of movement in the horizontal plane and fitted rigidly with it the centering pipe entering the hole of the flange rigidly fixed in the horizontal plane relative to the furnace cupola. Moreover, the device is equipped with a base installed on the dome of the blast furnace, on which racks are mounted. In addition, the connection of the racks with the bunkers and the base is made by means of hinges. Such a constructive implementation of the loading device allows to ensure the coaxiality of the guide pipe and the base of the base for any temperature deformations. In this case, neither the stand nor the element. sealing connection of the centering nozzle with the base, almost does not perceive transverse loads, which eliminates the possibility of damage due to overheating of the base. FIG. 1 shows the boot device, general view; in fig. 2 charge tract, general view; in fig. 3, node I in FIG. 2. The loading device consists of a receiving funnel 1 installed on the metal constructions of the furnace, two blended paths 2 in which the batching of charge materials and their supply to the batch distributor 3 and mounted on the support ring C of the furnace of the base 5 on which the charge paths are mounted and distributor- 3. Each charge path contains a bunker 6, supported by racks 7, connected to the bunker 6 and the base 5 by means of universal joints 8. From the bottom, charge gate 9 and a gas are rigidly attached to the bunker 6 a shut-off valve 10, to the lower flange 11 of which the centering nozzle 12 is attached. The lower end of the nozzle 12 enters the opening of the flange 13 fixedly mounted on the neck 1i of the cut-off 9 4 device 15 mounted on the base 5. Outside the nozzle 12 is covered by the bellows insert 1b , the upper end of which is welded to the nozzle 12, and the lower end to the flange 13. On top of the hopper 6 there is a second gas cut-off valve 17, of the same type as the valve 10. The loading device operates as follows. .Portii charge supplied koloshn-. through a hopper 1, through the receiving hopper 1 and the open top gas-cutting valve 17, the hopper enters. After the valve 17 is closed, the pressure in the bunker is equalized with the furnace and the charge contained in it through the valve 9, valve 10 and nozzle 12 enters the valve distributor 3, which puts it on the top plate in accordance with a predetermined program. Due to uneven heating of the base 5 by furnace gases. The centers of the lower hinges 8 mounted on the base are displaced in plan relative to the center of the flange 13. At the same time, the centers of the upper hinges 8 connected to the hopper 6 retain their position, as the nozzle 12 , resting against the bore of the flange 13, prevents the hopper, which is rigidly connected with it, from moving. Racks 7 in this case rotate in a vertical plane and occupy a position corresponding to the new position of the centers of the hinges 8. The proposed loading device, in comparison with the known ones, makes it possible to unload the supports of the bunkers and the bellows insert from transverse loads, which makes it possible to simplify and facilitate their design, as well as extend their service life. The annual economic effect from the use of the invention is 105.6 thousand rubles. Claims 1. A blast furnace charging device comprising a bunker with supporting posts and a guide hole for the charge material provided with an elastic sealing element, different in that, in order to increase its reliability, the bunker is mounted on the stands with the possibility of moving in a horizontal plane and supplied a centering nozzle entering the hole of the flange fixed in a horizontal plane relative to the dome of the furnace. 2. The device according to claim 1, .o tl and that it is equipped with a base mounted on the furnace dome on which the racks are mounted. 3. The device according to paragraphs. 1 and 2, in that the racks are connected to the base and the hopper by means of hinges. Sources of information taken into account in the examination 1. Works VNIIMETMASH. M., 1976, No. C, p. 3-12. 2.Tselikov A.I. and others. Machines and units of metallurgical plants. G. 1, M., 1976, p. 253.