SU908890A1 - Convertor guard - Google Patents

Description

fs.)

CONVERTER COVER

I

The invention relates to non-ferrous metallurgy, in particular, to devices that provide you with the capture of converter gases and the reduction of gas pollution in the shop during the conversion of non-ferrous metals.

Shelters for converters are known, consisting of two stationary side and vertical walls with gas outlets, movable front walls protected from the inside by screens, as well as an inclined butterfly valve with a drive located above the front walls lj.

Closest to the present invention, there is a converter cover, containing front movable walls suspended in the upper part on rollers and protected from the inside by screens, driven by two pneumatic cylinders, a pivoting inclined damper located above the front movable walls and connected on each side with a double-arm lever .

Moreover, one arm of the lever is connected with the drive, and the second with the counterweight, two stationary side walls with gas outlet pipes and an inclined sectional plate 21,

To constantly hold the tilting flap in any position, counter-weights and two brakes installed on the drive shaft of the flap are used.

The disadvantage of the known cover is incomplete gas trapping when loading the converter, since the front moving walls are open and, therefore, there is a possibility of gas discharging from under the cover, and when cleaning the converter neck, as the tilting flap closes the gas passage during this operation. In addition, the front moving walls have a high intensity of metal, their bearing units and pneumatic cylinders are unreliable in operation under conditions of high temperatures and aggressiveness.

media environments; the design of the front moving walls is complicated; possibly warping of screens, open front moving walls prevent the installation of similar shelters on adjacent converters and degrade the view of the converter and crane operator. The tilting flap also has a large metal content; its drive with brakes is located in the zone of high temperatures and corrosive environment, which worsens the conditions of its operation, maintenance and repair. The presence of a bulky system of supporting structures worsens the conditions of operation, maintenance and repair of technological equipment.

The purpose of the invention is to improve the sealing of the converter and ease of use, simplify the design of the shelter and reduce its metal consumption.

To achieve this goal, in the shelter of the converter containing stationary side and vertical walls, the front wall can be moved and the gas outlet pipe, the front wall is made in the form of a flexible curtain of heat-resistant fabric, reinforced with metal pipes in the transverse. with steel ropes in the longitudinal direction.

In addition, the shelter is provided with a drum for winding a flexible curtain.

Figure 1 shows the shelter of the Converter, side view; figure 2 is the same, front view; Fig. 3 diagrams of basic converting operations (where I position is matte blowing, I position I. - melt lining output, 111 position - melt drain into the ladle, IY position - loading of the converter with a ladle,. position Y - cleaning the converter neck.

The converter shelter includes stationary side 1 and vertical 2 walls covering the converter from the ends and from the tuyeres, a flexible curtain 3, reinforced with metal pipes C in the transverse direction and steel ropes 5 in the longitudinal direction and wound onto the drum 6 by means of a drive 7. For maintenance of which are provided for platforms 8.8 of the proposed design; curtain bending is made of heat-resistant, for example carbon, fabric that retains durability and flexibility at high temperatures and corrosive environments, Movable structures made of steel, drive - from standard components.

The proposed converter shelter works as follows.

In position I (see FIG. 3), matte is purged. The neck of the converter 9 is located under a napylnik 10. The bending of the curtain completely covers the converter. Gases escaping from under the sprayer to the inside of the shelter, are removed into the gas outlet pipe 11.

In position II, the tuyeres are removed from the melt. The neck of the converter comes out from under the spray gun. Bending the curtain completely closes the converter. Gases escaping from the throat are removed to the gas outlet.

In position III, the melt from the converter is drained into the ladle. Bending the curtain completely closes the converter. The gases evolved from the converter neck and from the ladle are removed to the gas outlet.

In the IY position, the melt is poured into the converter. The bending curtain is lowered from above onto the bucket and captures the gases released during the casting, which are removed to the gas outlet.

In position V, the throat of the converter is cleaned. The bending of the curtain rises to a level that ensures the complete removal of gases evolving from the neck of the converter and does not interfere with the cleaning operations of the neck. The lift height of the flexible curtain in this case is due to the neck cleaning technology used on the particular unit.

The proposed shelter provides almost complete capture of fugitive gas emissions from the converter neck and ladle in all non-ferrous metal conversion operations; compactness of the converter shelter, which is especially important when sheltering a number of close-standing converters and a small crane height in the workshop; metal consumption reduction due to replacement of metal structures of movable front walls and tilting flap with a flexible curtain, reliability of the shelter operation due to fewer drives, as well as simplicity of the shelter design and the possibility of quick and easy replacement of wear parts, in particular curtain fabric.

Claims (2)

1. Converter cover, containing stationary side and vertical walls, front wall with possible movement and gas outlet pipe, characterized in that, in order to simplify the cover design, reduce its metal consumption and provide ease of operation, the front wall is made in the form of a flexible curtain heat resistant fabric, reinforced with metal pipes in the transverse direction and steel ropes in the longitudinal direction. 2. Shelter according to claim 1, characterized in that it is provided with a drum for winding a flexible curtain. Sources of information taken 8O attention during the examination 1. USSR author's certificate Vf, cl. 27 B 7/20, C 22 B 15/06, 1977. 2. USSR author's certificate No. | 4б290, cl. From 22 to 15/06, 1975. c 4. h-.v ,,. l .- .. ,,.; & “. f l y: r4: c: -l, o: g :; /v.,.,A .. ig.1 jf ; rf; "®r" V spf "eT 4 ltf i V lt yj - if 4 A y X 4ts 3 rd: rx: V.%, A:.-Lch /; .2, / kL / r; s..V .: “. d.2 Position I .J