SU981367A1 - Device for spreading charge materials over grate of blast furnace - Google Patents

Description

(5) DEVICE FOR DISTRIBUTION

SILVENT MATERIALS ON THE COLUMNS

The invention relates to ferrous metallurgy, 8 in particular to devices for the distribution of feed materials in shaft furnaces, and can be used in blast furnace production.

Designs of movable plates are known, which are suspended vertically on brackets or hangers located around the perimeter of the furnace's top. The distribution of charge materials, Q by such plates, is carried out by changing the angle of inclination of the plates by means of individual drives or by moving them in the horizontal plane. 1 3-15

The disadvantage of such structures is the vertical placement of the plates in the upper part of the furnace, which leads to a reduction in the effective working height of the furnace and a decrease in its productivity.

Closest to the invention to the technical essence is a structure containing movable plates. DOMAIN FURNACE

evenly spaced around the top of the furnace with movement actuators mounted on the dome. The structure consists of brackets on which, by means of the earrings, the plates are suspended around the perimeter of the furnace. The change in the angle of inclination of each furnace is carried out by the rod of the hydraulic cylinder mounted on the side of the plate outside the furnace z}.

The disadvantage of this design is also the vertical placement of the plates, which reduces the useful height of the furnace and consequently reduces its performance.

The purpose of the invention is to reduce the height of the furnace throat occupied by the plates and increase the useful volume and productivity of the furnace.

Claims (2)

This goal is achieved by the fact that in the device for the preparation of charge materials at the top of the blast furnace, including movable plates, evenly placed around the perimeter of the furnace with displacement actuators mounted on the dome, each plate is connected to a holder made in the form of a shaft coming out of the dome The furnaces, through the opening in the dome, with the plates in relation to the horizontal plane passing through the bottom plates, are located at an angle exceeding the angle of natural slope of the materials. Each holder is made in the form of a rod of a hydraulic cylinder with the possibility of reciprocating movement. In addition, each holder is fixed by a shank in thrust bearings with the possibility of rotational movement by means of an individual line. FIG. 1 shows the proposed device with the reciprocating movement of the plates; in fig. 2 - the same with a change in the angle of inclination of the plates through the rotational moment. A device for distributing charge materials at the top of a blast furnace consists of moving plates 1 located along the top of the furnace at an angle to the furnace axis. Each plate is connected to the holder 2 connected to the actuators 3, by means of which the holder 2 is moved or rotated with the plate 1. The holder 2 exits through the hole k, the packing 5 from the dome part of the blast furnace to the actuator 3. When using the hydraulic actuator Moving the plate 1 and relieving the dynamic loads that occur when the material is poured onto the plate serves as a support roller 6. During the rotational movement of the plates 1, the shanks of the holders 2 are fixed in thrust bearings 7 and 8: Device with reciprocating moving plates operates as follows. When loading the charge materials into the peripheral zone of the top of the plate 1, they are in the upper garage position. The material is poured from a large cone and, without touching the plates, lies against the walls of the furnace top. If it is necessary to change the distribution of materials, hydraulic cylinders are included and the holders 2 of the plate 1 are served under the trajectory of movement of these materials. The charge materials, reflected from the plates 1, lie with a comb closer to the center of the furnace. Depending on the depth of supply of the plates 1 to the furnace stove space, varies with the radius of movement of the crest of materials. The device with the change of the angle of inclination of the plates by means of the rotational moment works as follows. When loading charge materials into the peripheral zone of the top of the plate 1, they are installed with an edge against the flow of bulk material, which, wrapped around them, lies with a ridge against the walls of the top furnace. In order to move the comb of the material in the direction of the axis of the furnace, include electric drive. The rotational moment from the actuator through the holder 2 is transmitted to the plate 1. The plates 1 are rotated at a certain angle, overlapping the peripheral area of the furnace top. The charge material, poured from a large cone, partially passes between the plates 1 and lies in the peripheral region, and partially reflects from the plates 1 and lies with the ridge closer to the furnace axis. When the working surface of the plates 1 is turned in the opposite direction to the current of the bulk material, iaecb, the charge material is reflected from the plates and lays as close as possible to the furnace axis. The proposed design of the movable plates differs from the known ones by their more rational placement in the dome space of the furnace. During the reciprocating movement of the plates, the possibility of removing them from under the path of movement of the material when it is loaded with a ridge into the peripheral zone helps to reduce the wear of the surface of the plates and reduce the loads on the fixing and drive units. Moving the plates in a vertical position and setting them at an angle to the axis of the furnace reduces the height occupied by the plates, which increases the useful height of the furnace and thereby makes it possible to increase its productivity. By varying the angle of inclination of the plates by means of the rotational moment, the segregation of the material in the peripheral area of the furnace is reduced due to the fact that the material partially passes between the plates and is partially reflected from it. This contributes to a more uniform distribution of materials along the top radius and an increase in the use of chemical and thermal energy of reducing gases. Claim 1. Device for distributing charge materials at the top of the furnace of the furnace containing movable plates evenly placed around the perimeter of the furnace with displacement actuators mounted on the furnace dome, characterized in that, in order to reduce the height of the furnace throat occupied by the plates and increase the useful volume and furnace capacity, each plate is provided with a holder connected to its upper end part, made in the form of a shaft coming out of the furnace through an opening made in the dome, while the plates are relative to a horizontal plane passing through the lower end plates are disposed at an angle greater than the angle of repose of the charge materials. 2. The device according to claim 1, 1 and 2, so that it is equipped with thrust bearings, in which each holder is fixed with a shank connected to the drive. Sources of information taken into account in the examination 1. Patent of Germany No. 1583179, class, C 21 V 7/08, 1971. 2. Patent of Germany No., class From 21 to 7/08, 1978.