SU992586A2 - Hopper trestle for blast furnace - Google Patents

Description

ABOUT ISAI

Inventions

TO AUTHOR'S CERTIFICATE

Union of Soviet

Socialist

Republics <11.992586

USSR State Committee for the Acquisition and Discoveries (61) Additional to ed. certificate No. 865906 (22) Declared 040880 (21) 2968336 / 22-02 with the addition of application No. (23) Priority

Published on January 30th, 2008. Bulletin No. 4

Date of publication of the description 30.0183 (72) Authors of the invention (71) Applicant {S1) M.Kn?

C 21 V 7/00 (53) UDC 669.162.

.24 (088.8)

A.N. Gorodetsky, L.I. Arist, E.A. Yarovinsky

A.L. Shulyatsky, E.Ya. Klotsman, E.M. Dmitriev, G

I.T. Khomich and Ya.A. Shlemovich I

Ukrainian State Institute of Metallurgical Plants .4¾ designing .......

I.

j tag (54) BUNKER BOARD OF THE FURNACE

The invention relates to metallurgy, in particular to ferrous equipment, and pre-batching to a blast furnace production is started for receiving, supplying, washing and loading a charge into a blast furnace.

According to the main author. St. No. 865906ί the bunker overpass of a blast furnace is known, including a bunker, screens, scales, conveyors, and the surfaces of the components of the billet vanity equipment are installed with a slope in one direction, and the assembly conveyor is connected by trays with bunker scales, the shutters of which are capable of regulating sections in one direction [ 1 ].

However, the dosing of charge materials in the process of their supply to the top of the blast furnace does not correspond to the required accuracy of the ratio of components and the possibility of changing them · during operation, taking into account the available raw materials and its features both in fractional composition and in quality. This is due to the fact that the sector gates of the hopper weights are made located along the entire length of the hopper and when they open, the material is scattered over the entire surface of the formed gap. All this leads to the fact that with a charge with a large fineness of the pieces, it is impossible to establish the gathering of the material in small portions, since in this case the gap along the length of the hopper remains constant, and the size of the pieces requires a significant opening of the sectoral shutter. In addition, if the tray is installed stationary on the assembly conveyor, this leads to uneven loading of the conveyor and even the possibility of the tape coming off the rollers.

The purpose of the invention is to improve the dosing of charge materials in the process of feeding them to the core of a blast furnace.

This goal is achieved by the fact that in the bunker rack of a blast furnace containing bunkers, screens, scales, conveyors, surfaces of the elements * of the billet vanity equipment installed with a slope in one direction, and the assembly conveyor is connected by trays with bunker scales, the shutters of which are adjustable sections in one direction, and the hopper scales are equipped with additional adjustable closures installed perpendicular to the main ones, and the trays are made with the possibility of their movement relative to the axis of failure full-time pipeline.

In FIG. 1 shows a bunker overpass, general view; transverse section; in FIG. 2 is a view along arrow A in FIG. 1.

The bunker overpass of the blast furnace consists of a transport device 1 for loading the charge into the bunker, under which receiving hoppers 2 are installed. Under the discharge openings of the latter, screens 3 are installed to screen the fine fraction of the charge. Funnels 4 for receiving screenings and conveyors 5 for its disposal for disposal are located under the screens. At the end of the screens, estruses are installed, under which the scales 7 are fixed with weighing devices 8. The outlet 'openings of the hopper scales are closed by shutters 9 connected by cranks to the drives 11. The drives have several ·· fixed positions of the cranks 11, which allows the shutters to be installed in the process work in predetermined positions and thereby regulate25 the size of the slots of the exhaust holes along the length of the hopper scales. Trays 12 bunker scales connected to the funnels 13 of the assembly conveyor 14, feeding the charge to the top of the blast furnace. In the bunker scales inside, perpendicular to the shutters 9, additional shutters 15 are installed (Fig. 2) on the axles 16 connected to the outwardly adjustable levers 17, the position of which is fixed on the brackets 18.

Trays 12 are mounted on carts 19 with the possibility of their movement on the rails 20 and fixing on them. For the possibility of removal to the far right position (repair, maintenance, etc.), a hinged cover 21 is provided on the tray (Fig. 1).

Bunker overpass works as follows.

Using loading devices 1 fill the hopper 2 with charge materials (sinter, pellets, coke, etc.). By turning on the screens 3, the material is sieved. A small fraction of it through funnels 4 and conveyor 6 goes for disposal, and a large fraction in heat 6 enters the hopper scales 7. According to the indications from the weighing devices 8, the dose weight of the material is determined. Then the shutters 9 are installed with the help of actuators 10 with cranks 11 in a position that ensures the cross-section of the outlet openings of the hopper scales required by the technology for a given period. The shutters 15 are also pre-installed on the scales, turning them behind the levers 17 around the axes 16 and fixing them on the brackets 18. Due to this, the charge materials in the weighing bins “go along a predetermined optimal cross-section and exit them through the slit of the shutter 9, which is already adjustable along the length. Then the charge along the trays 12 through the funnels 13 enters the assembly conveyor 14. Preliminarily, by moving the trolley 19 along the rails 20, the tray is installed further or closer to the axis of the conveyor, thus achieving the optimal position of the pieces of material on the belt. This is important because falling material far from the axis of the conveyor can cause the tape to come off.

In turn, it creates the ability to lay the material in a progressive manner on the assembly conveyor belt (Fig. 2); place small fractions of coke or sinter on the tape below, and heavy pieces (large) ores, sinter, etc. on them, which will allow loading oven fraction previously not loaded into the oven, for example, a large screening. Stacked on a tape, conveyor 14, the material is fed through it to the loading device of the blast furnace. The invention allows to improve the dosage of charge materials in the process of feeding them to the top of the blast furnace, to organize directed optimal convergence of the charge components and their rational placement on the assembly line.

Claims (2)

their movement relative to the axis of the assembly line. FIG. 1 shows the bunker platform, general view; The cross section in FIG. 2 is a view along arrow A in FIG. 1. The bunker trestle of a blast furnace consists of a transport device 1 for loading the charge into the bunker, under which the receiving bunks are installed 2. Under the discharge ports of the latter, screens 3 are installed for sifting out the fines fraction of the charge. Under the screens there are funnels 4 for receiving screenings and conveyors 5 for its disposal for recycling. At the end of the screens, the chutes S are installed, under which the scales 7 are fixed with weighing devices 8. The outlets of the bunker scales are blocked by gates 9 connected by cranks with the drives 11. The drives have several fixed positions of the cranks 11, which allows the gates to be installed during their operation , in predetermined arrangements, and thus adjusts the size of the slots of the outlet openings along the lengths of the hopper scales. Trays 12 bunker scales connected to the funnels 13 of the assembly conveyor 14, feeding the latitude at the top of the blast furnace. In the bunker scales inside, perpendicular to the gates 9, the gates 15 are additionally mounted on the axes 16, connected to the adjustable levers 17 that are brought out, which position is fixed on the brackets 18. The trays 12 are mounted on the trolleys 19 with the possibility of their movement along the rails 20 and fixation on them. To allow for removal to the extreme right position (repair, maintenance, etc.), a hinged lid 21 is provided on the tray (Fig. 1). Bunker overpass works as follows. With the help of loading devices 1, the bunker 2 is filled with charge materials (agglomerate, pellets, coke, etc.). The inclusion of screens 3 material sift. The fine fraction of it along the funnels 4 and the conveyor 6. goes to recycling, and the large choke enters the hopper scales 7. According to the indications from weighing devices 8, the weight of the dose of material is determined. Then, gates 9 are installed with the help of actuators 10 with cranks 11 in a position that provides the cross section of outlet openings of bunker scales required by the technology during this period. The bolts 15 are also pre-installed on the scales, turning them behind the levers 17 around the axes 16 and fixing them on the brackets 18. Due to this, the batch materials in the weight bins go through the predetermined optimal cross section and exit through the slot 9 already adjusted along the length. Then, the charge through the trays 12 through the funnels 13 enters the assembly conveyor 14. Pre-moving the carriage 19 along the rails 20, the tray is placed farther or closer to the axis of the conveyor than the optimum position of the pieces of material on the belt. This is important because the fall of the material far from the axis of the conveyor can lead to a gathering of the belt. In turn, it becomes possible to place the material progressively (Fig. 2) onto the tape of the coke or agglomerate on the tape, and coarse pieces of ore, agglomerate, etc., onto the tape, which will allow the fraction not previously fed into the furnace, for example, large screenings, into the furnace. Laid on the belt, conveyor 14, the material is fed through it into the charging device of the blast furnace. The invention allows to improve the dosing of batch materials in the process of their supply to the blast furnace top, to organize the directed optimal gathering of charge components and their rational placement on the assembly conveyor. Formula of Invention Bunker's blast furnace flyover according to aut. St. 865906, characterized in that, in order to improve the dosing of charge materials during their supply to the blast furnace top, hopper scales are equipped with additional adjustable valves, perpendicular to the main, and the trays are movable with the possibility of moving, extending relative to the axis of the assembly conveyor. Sources of information taken into account in the examination 1. USSR author's certificate 865906, cl. S T / OO, 1979.