SU1659492A1 - Blast furnace charging gear - Google Patents

Abstract

The invention relates to ferrous metallurgy and can be applied in blast furnace charging devices. The purpose of the invention is to save coke by improving the uniform distribution of the charge, increasing the service life and increasing the reliability of the device. By changing the positions of trays 14 and 15, 4 skips of charge materials are successively loaded into the cells of the storage bin 7 formed by partitions, after which the cone 6 is lowered and the mixture is laid on the cone 10. When opening the cone 10, the charge is evenly laid on the furnace head. 2 hp ff, 9 ill. ,15

Description

This invention relates to ferrous metallurgy, in particular to the equipment of blast furnaces.

The purpose of the invention is to save coke by improving the uniform distribution of the charge, increasing the service life and improving the reliability of the device.

Figure 1 shows the device, a general view; figure 2 - section aa in figure 1; on fig.Z - view B in figure 1 (option 1); , FIG. 4 - the same, according to p. 3 of the claims (variant 2); figure 5 - section bb In figure 4; figure 6 - section GG in figure 4; figure 7 is a cross-section dD in figure 6; on Fig - section EE in figure 1 (option 1); Fig. 9 is the same according to Clause 3 of the claims (Option 2).

The device contains a receiving hopper consisting of two parts 1 and 2, the lower part of which is provided with a partition 3, rigidly connected to the centrally installed protective tube 4, a rod 5 that spans the gap, connecting the sealing cone 6 (not shown) to the drive periodically coming into contact with a fixedly installed storage bin 1. The device also contains a charging unit including a gas shutter 8, a driving rod 9 and a gas sealing cone 10. On the partition 3 through bearing units 11 are supported by individual rotational drives (not shown) of shafts 12 and 13, to which distribution trays (flow distributors) 14 and 15 are rigidly attached to an H-shaped cross-section.

To the bottom of the pipe 4 is rigidly attached to a hollow truncated cone 16, covering with a gap part of the surface of the cone 6.

In the cavity of the hopper 7, two partitions 17 and 18 are permanently mounted, which are mutually perpendicular to the formation of cells. In the receiving funnel, perpendicular to the partition 3, a separating wall 19 is mounted, made equal in height to the receiving funnel and rigidly connected to the pipe 4,

The partition 17 of the storage bin 7 and the partition 3 of the receiving funnel, as well as the partition 18 and the separation wall 19 are installed so that each of the listed pairs of elements has a common vertical plane of symmetry.

When supplying a typical receiving funnel, having one inlet and outlet, a partition 3 and a distribution wall 19, an outlet opening 20

the receiving funnel is divided into four equal parts (Figs 3 and 8).

A more uniform distribution of the charge material is facilitated by the cells of the receiving funnel with circular outlet openings 21-24, the centers of which are evenly spaced around the circumference and equidistant relative to the vertical axis of the furnace (Figures 4 and 9).

The outlet openings 21-24 of the receiving hopper cells are made with a diameter of 600-700 mm, since with such geometrical parameters of the outlet openings from the receiving hopper cells, it is ensured that the batch material is released without a pit, and the skip feed of the charge is released from the receiving cells funnels in the operation mode with accumulation.

0 Between the bottom end surfaces of the bulkheads 17 and 18 of the storage bin 7 and the surface of the gas sealing cone 6 there must be a gap (I) equal to 5-10 mm, since in the process of loading the cell, pouring the charge through the slots into the adjacent cells is excluded. in addition, gas-tight articulation of the cone 6 with the hopper 7 is provided.

Stationary mounted hollow

0 the truncated cone 16 is made with geometrical parameters, at which it takes up a significant part of the load on the weight of the charge material loaded in the cells of the storage bin 5 and 7 and the receiving funnel.

The device works as follows.

Initially, distribution trays 14 and 15 are installed in one of the pairs

0 horizontally located cells of the receiving funnel. Then the batch material through the left and right skips alternately served on the distribution trays 14 and 15, which later

5 direct it to the cells of the storage bin 7. When emptying the left and right skips, into two of four pairs of vertically located cells of the storage bin 7 and the receiving hopper charge

0, the material is laid in a volume equal to the volume of two skips, i.e. The pair of the charge in the volume of one skip is placed in a pair of vertically arranged cells of the bunker and a funnel. After this, the distribution chunks 14 and 15 are placed in position above the partially loaded cells of the receiving funnel using individual rotation drives. In the future, charge material through the left and right skips and trays 14 and 15 alternately

load in the blank cells of the storage bin 7 and the receiving funnel. After loading the charge supply in a volume equal to the volume of four skips, in the cells of the storage bin 7 and the receiving funnel four charge doses of the same geometrical shape are formed which, when moved to the open position of the gas sealing cone 6, simultaneously fit into the cavity of the gas seal 8, as a result In the cavity of the latter, a charge is formed in the form of a body of rotation with an axis coinciding with the vertical axis of the furnace. When unloading from the cavity of the charging unit for feeding the charge, a charge is formed on the surface of the furnace throat, which is characterized with a uniform distribution of the charge.

Thus, the proposed facility provides an even distribution of the charge due to the formation in pairs of vertically arranged cells of an accumulation bin and a receiving hopper of mounds uniformly spaced around the circumference and having the same geometric shape; reduces coke consumption by uniformly distributing the charge at the furnace top of each of the material feeds loaded and reducing the segregation of the charge material when loading each of the vertically positioned pairs of cells in the storage bin and receiving hopper with relatively small transverse dimensions: provides an increase in the life of the charging unit due to load of supply of charge in the amount of four skips into the cavity of the gas gate for one opening of the cone gate of the storage bin and due to eliminating the swinging of the cone of the charging unit when unloading the filling in the form of a body of rotation; provides increased service life

Aa

I-

equalizing valves by reducing the number of their operation and the storage hopper boom by eliminating abrasive rubbing of it on the charge when opening the cone gate, and also provides an increase in operational reliability due to the fact that a significant part of the load is from the weight of the feed of the charge loaded in the storage hopper cells and the receiver 10 of the funnel, is perceived by a hollow truncated cone of the protective casing permanently installed and located above the gas-sealing bunker cone.

Claims (3)

1. A blast furnace loading device containing a receiving funnel divided into two parts by a dividing wall, a stationary storage bin with a gas sealing cone rigidly mounted on a rod connected to a vertical movement drive, characterized in that. that, in order to save coke by improving the uniformity of distribution of the charge, increasing service life and increasing reliability in operation, it is equipped with placed in a receiving funnel on drive shafts installed perpendicular to the dividing wall, two distribution trays and two mutually perpendicular partitions rigidly fixed inside the storage bin. 2. The device pop. 1, characterized by the fact that it is equipped with a stationary a protective casing covering the rod and the gas sealing cone with a gap, 3. Pop 1 device, characterized in that the receiving funnel is made with four round output holes, evenly spaced around the circumference and equidistant from the gas sealing cone rod. See FI.2 /four 21 V Y fie5 ; X HUUCHUCHUUCHH SS VidV 1922 C / - figl 15 gd FIG. 6 & 2Л 15 / HER FIG. 8 HER 2b 23 21 figs