SU470169A1 - Blast furnace bell-and-hopper arrangement - Google Patents

Description

one

The invention relates to the field of ferrous metallurgy, and more specifically to the equipment of a blast furnace charging system.

A blast furnace charging device is known, comprising a receiving rotary funnel, parallel bins for the charge with upper and lower gas shut-off valves and charge valves, a stationary distribution cone and a guide funnel beneath the bins above the cone.

The purpose of the invention is to improve the quality of the distribution of bins at the furnace top and increase the service life of the device.

The proposed charging device of the blast furnace is characterized in that the guide funnel is made sectional with the possibility of reversible rotation about the vertical axis at a predetermined angle.

The total angle of the reversal curve of the guide funnel may be within the central angle between the nearest walls of the two, adjacent to the discharging openings of the bunker.

Partitions dividing the funnel into sections can be made drop-shaped in plan.

FIG. 1 shows the described boot device, general view; in fig. 2 is the same, top view in section along A-A in FIG. one; in fig. 3 shows a guide funnel, a plan view, a section along B-B in FIG. one.

The loading device comprises a swivel receiving hopper 1, four bunkers 2, a gas stopper 3, a guiding hopper 4 and a distributor 5.

The funnel 1 serves to alternately load the bins through the guide chutes. The bunker 2 is equipped with gas shut-off valves 6 and 7, respectively, the upper and lower, charge (cargo) gate 8 and the gas valve 9.

The gas shutter 3 contains nozzles (hopper discharge openings) 10 and absorbs the load from the entire loading device.

The guide funnel 4 consists of a bowl And divided into four sections by partitions 12, a discharge opening 13, three ball bearings 14 and an actuator 15. The funnel reversively rotates by an order of ± 15 °, occupies the right, left and middle (zero) positions ( in Fig. 3, the indicated positions are respectively denoted by the letters P, L, O). it

provides twelve directions of flow of the charge to the distribution cone, uniformly distributed in the horizontal plane, and, consequently, the possibility of uniform distribution of the charge on the furnace's top or charging of the charge to a certain sector of it (to eliminate the furnace scan).

The distribution cone 5 serves to evenly distribute the incoming material (charge) to it around the throat's circumference and can be stationary with variable taper.

The boot device works as follows.

A swivel receiving hopper 1 is installed against one of the two flow paths, the upper valve of the corresponding bunker opens, and when the cargo lid and the lower valve of this bunker are closed, the charge is loaded into the bunker. Then the valve 6 is closed, the pressure in the bunker is equalized with the pressure in the blast furnace, the lower valve and the cargo gate are successively opened. The charge flow, passing through the gas gate pipes and through the corresponding section of the funnel guide, pre-installed in one of three positions (L, O or P), enters the distribution cone from the direction corresponding to its discharge hopper and the position of the funnel guide, and further distributed by a uniform ring on the top of the blast furnace. With a distribution cone with a variable cone, the setting is corresponding to the setting; its angle of inclination on the cone forming is adjusted

Fell charge on the top. After the hopper is unloaded, the cargo lock and the bottom valve are closed, the pressure in the bunker is equalized with atmospheric, the upper valve opens, and the bunker is again ready to receive the charge.

The order of loading (unloading) of the bunkers can be any, depending on the adopted scheme for loading the blast furnace.

Claims (3)

1. A blast furnace charging device, containing a receiving rotary funnel, parallel installed hoppers for the charge with upper and lower gas shut-off valves and charge closures, a stationary distribution cone and a funnel located below the hoppers above the cone, characterized in that, in order to improve the quality of distribution the charge on the furnace top and increase the service life of the device; the guide funnel is made sectional with the possibility of reversible rotation about the vertical axis on given angle. 2. A device according to claim 1, characterized in that the total angle of the reversal rotation of the direction of the funnel is within the central angle between the nearest two walls, adjacent to the discharging openings of the bunker. 3. The device according to PP. 1 and 2, characterized in that the partitions, which divide the funnel into sections, are drop-shaped in plan. ten