SU734288A2 - Blast furnace loading device - Google Patents

Description

(54) DOWNLOAD LOADING DEVICE

one

The invention relates to ferrous metallurgy, namely, equipment for loading blast furnaces.

According to the main auth.st.) 487126, a device is known, made in the form of conical closures arranged one above the other with moving mechanisms, a thermal bunker; with driven gas sealing valves, distribution funnel and driving charge distributor.

However, the operation of this device leads to different speeds of movement, segregation, freezing of small fractions of the charge and its penetration between the plate and the seat of the gas catch valve.

The aim of the invention is to improve the quality of distribution and the elimination of the charge suspension in the distribution funnel.

This is achieved by the fact that in the loading device the funnel is made with flat working surfaces and straight ridges, with the angles of inclination of the faces of the surfaces being 1.2-1.5 of the angle of repose of the charge, the funnel is made with self-fusing pockets.

Such a constructive solution provides the same speed of movement, an increase in the quality of distribution and the absence of suspension of the charge.

FIG. 1 shows the boot device, general view; Figure 2 is a distribution funnel, plan view; in fig. 3 - section aa on

10 of FIG. 2; in fig. 4 shows a section BB in FIG. 2

The loading device consists of a top flange with a bowl 1, a large cone 2 that contacts

15 with a bowl, a gas seal 3 and a funnel body 4 installed on it, a small cone 5, forming a sealed chamber with gas sealing valves 6, blocking the outlet openings of the distribution funnel 7 above.

25 through gears 11.

Above the rotating distributor 8, a fixed receiving funnel 12 is installed to receive the charge

materials from skip 13 or-belt conveyor.

In the place of exit of the rod mgshy cone 5 from the cover of the sealing chamber installed omental seal 14.

The distribution funnel 7 has straight ridges 15 and working planes 16-18, forming polygonal holes 19 and faces 20-23.The angle of inclination of the latter is greater than the angle of repose of the charge. The connector 24 of the distribution funnel 7 occurs along the ridges 15 and is covered from below with angles 25, forming pockets for self-lining the connectors with the charge.

The boot device operates as follows.

The charge materials from the skip 13 through the stationary receiving funnel 12, the rotary valve 8, the distribution funnel 7 are directed into a sealed chamber with gas sealing valves. B.

The distribution funnel is divided 7 times by connectors 24 into several parts that move from the axis of the blast furnace. This ensures the repair and installation of gas sealing valves 6 without dismantling the equipment adjacent from above and reduces downtime of the blast furnace. During the operation of the blast furnace, the charge materials fill the pockets located along the connectors 24 and formed by the angles 25, which ensures the self-lining of the connectors 24 with the charge and increases the service life of the distribution funnel 7.

The constant angles of inclination of the working planes 16-18 of the distribution funnel 7 provide the same speed of movement of the charge materials, which reduces segregation and

improves the distribution quality of the charge.

The edges of the working planes of the funnel have a slope that is 1.2-1.5 times the natural angle of the charge slope, which prevents the small fractions of the charge from hanging up between the plate and the valve seat at the time of its closing.

The inclination of the faces of the working surfaces of the distribution funnel is less than 1.2 times the angle of repose of the charge, does not exclude the hanging of small fractions of the charge. Increasing the angle of inclination of the faces above

1.5 times the angle of the natural

the slope leads to a significant increase in the speed of movement and grinding of the charge.

Using a boot device reduces

segregation and improving the quality of charge distribution, increasing the service life of the charging unit by 2025% and reducing the shutdowns of the blast furnace to replace the filling units

apparatus; an increase in the production of pig iron by reducing the number and duration of stops at the replacement and repair of the charging unit.

Claims (2)

1. The boot device of the blast furnace auth. St. No. 487126, characterized in that, in order to improve the quality of the charge distribution, the funnel is made with flat working surfaces and straight ridges, with the angles of inclination of the faces of the surfaces being 1.21, 5 of the angle of repose. 2. The device according to claim 1, wherein the funnel is made with connectors along the ridges with self-lining pockets.