SU761817A1 - Apparatus for removing gases from arc furnace bath being charged - Google Patents

Description

The invention relates to electric arc furnaces, electric furnaces, in particular, to devices for removing gases, and loading with a charge of a heated bath of interest.

A device for trapping gases, containing, Zoit,. gas ducts and inlet annular air duct, which provides air flow in the direction of the umbrella. Such a device has large dimensions, cumbersome) and during the period of loading the charge into the 'bath of the furnace', it works ineffectively because of the overlap of a significant part of the suction opening of the umbrella and the slot of the rear of the load capacity. In addition, the combination of the slot of the umbrella with the cable of the crane is extremely difficult [1].

A known device for the production of metals by metallurgical smelting with a gas outlet cap, inside of which is placed a melting bed in the chamber, and closing doors are provided for moving the loading elements from the charging crane. Such a complete shelter of the space around and above the furnace, although it provides non-proliferation of gases throughout the plant, but creates worse conditions for the staff, its design is difficult and expensive. Due to significant air leaks the volume

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15

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25

thirty

exhaust gas is very large, which will inevitably lead to increased power gas treatment plant (2).

A device is known for the removal of gases generated in an electric furnace, which is a gas collection pipe that intersects with the mine to supply the charge, thereby providing partial dedusting of the removed gases and preventing their release through the charge loading site. Such a device, especially in the part of the mine for supplying the charge, has a significant size, its application is difficult due to the need to provide bulky / cooling detachable elements. Serving, top of the oven when

device represents

the difficulties. In addition, during the period of continuous supply of charge materials, gas removal will be significantly reduced, which will lead to the release of harmful gases and dust through the furnace’s leakage into the atmosphere of the workshop [8].

The closest in technical essence of the achieved result to the described invention is a device for sucking gas from an electric arc furnace, in which an annular pipe is used, which has slots for trapping

the presence of such significant

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the emitted gases, and the connection of the suction with a fan made by telescopic and hinged pipe joints.

However, complete capture of gases can not be provided in the zones, 'ι most distant from the suction pipes, as they are characterized by the least ^one suction. The presence of complex configurations of aprons and distribution partitions makes the device difficult to manufacture, cumbersome to install, Replacing these 'elements in operation under high thermal effects' is also very complicated [4].

The aim of the invention is to increase and improve the efficiency of gas collection and simplify the design of the suction. ' _ν This is achieved by the fact that the device

"made in the form of a box-mounted two-chamber pipeline, freely installed on the loading bucket and oriented 2 · along the end of the bath, 'connected with a pipe with a lid, interrupting the top of the bucket, with a gas removal system and with exhaust ventilation 2, the receiving end faces of the latter are on the same level and attached to the nozzles / mounted telescopic on the connecting pipes of the pipeline, and on the loading bucket in front of the load-handling devices around the perimeter s support for the locking device when it is being raised. Inside the box-shaped annular duct · · .smontirovana partition separating it into ί air supply channels for the air curtain and remove gases.

FIG. 1 shows the proposed device; in fig. 2 - section A — A of FIG. 1.

The device contains an annular two-chamber, 4-dimensional, freely fixed, a pipeline 1 with an internal partition 2 and connecting pipes 3 having telescopic nozzles 4 with flexible rods 5 to the tub with a charge, as well as a fan 6 4 for supplying air, the discharge pipe of which is installed "on one level with pipeline 7 system, gas removal.

In each annular chamber of the pipeline / annular slots 8 and 9 are made, and to its 5

’Have four racks attached to the outer wall

10. The upper part of the loading bucket is closed with a removable lid "1 \ 1, connected with a detachable socket .12 to the pipeline /, and in the lower part of the tub is mounted;

’Vans of support 13. (’ ’?

The device works as follows. '.,', ·

. When installing ba.dya with charge center

Peki baths annular pipeline / is laid on the upper part of it with pillars 10. In this case, the connection of the pipes 3 with the pipeline 7 and the ventilation valve exhaust pipe occurs.

6 by telescopic attachments 4. Then the fan turns on, and ί

air begins to flow into the outer channel of the ring pipe / and then through the annular slot 8 towards the bath walls, forming an air curtain, and through the slot 9 and from under the cover 11, gases are sucked. At the same time due to the free installation of the pipeline / possible movement of the tub during. unloading in the vertical direction.

The device operates at the time of discharge of the charge and the subsequent period of intensive burnout of impurities contained in the charge. When lifting the tub, the air supply and gas suction nozzles are disconnected, and the entire device is held by the supports 13 on the tub. Then, a vault is installed on the furnace and the usual gas removal system starts to operate through pipeline 7.

The use of an air curtain around a source of gas emissions makes it possible to almost halve the consumption of a gas suction pump and does not interfere with management. the process of discharging the mixture into the bath of the furnace.

Claims (2)

Claim 1. A device for removing gases from the charged charge of an electric arc bath containing an annular coarse pipe with racks, connecting nozzles and a fan attached to its walls, characterized in that, in order to increase the efficiency of gas collection and simplify the design, it provides it; The wife is a box-shaped two-chamber pipeline, pivotally mounted on the loading bucket and connected with quick-disconnecting nozzles with a lid overlapping the upper part of the bucket, with a gas removal system and with the exhaust of the fan perimeter. supports are mounted to ensure the locking device when it is fed. 2. The device according to p. / _{Characterized by the} fact that the box-shaped annular pipeline is equipped with a partition installed inside and separating it into air supply channels to create an air curtain and remove gases.