SU668727A1 - Apparatus for withdrawing gases from electric-arc furnaces by suction - Google Patents

Description

one

The invention relates to devices for trapping and suction of gases from electric arc furnaces through electrode gaps in the PCP array.

A device is known for the extraction of gases from electric arc furnaces through the annular space between the roof and the electrical compartment, which includes water-cooling) HY ecopo.; And the ventilation system with an exhaust: 11.

The disadvantage of this EGGY (1Istr1l5.11otc is low efficiency in p; -p (that is, the necessity of using D011olips; ia; -, 1 l of devices for elec- tion of electrons |) one.,. Gaps.

It is also known a device for ca. gases from electric arc furnaces in a water-cooled economizer, installed on the furnace vault and encloses an electric electrode that is fitted to the electrode holder, a gas and gas taps and a valve with a suction patches, and a plug-in plug and a suction patches. tubes with 1pelled holes and a diaphragm made of isolates of pionic material 2 |.

However, such a structure has c.io/; i: yu K (); structure, treb; iii yio.ioTiicinm eyuktrodn X clearances with inert Iazov.

The purpose of the invention is povpplenie e (h | nnostivnosti remove helium and gases, oh.zhuds P 0; ix and uspans1: -1e with vypv ;;; 1 :; gx through the electrode gaps.

) then; yustp so that in NCTpoiicTucd. suction ra3L) i; suction; osh.py n; ggr h: 101 vb, 11o:; foam rings 1U1M rigidly attached to the electrode holder,; u, and 1 gas: 1, it11, the size of iyen1p5n between water cooler; v; oomics and electrical; 1), filled in. In the form of a telescopic set; articulated perforated iin.inn.ipoB. the upper one of which is equipped with a hinge attachment to the annular socket is rigidly closed: 1. To :: to the electrode holder. and mnpjnpy - to the economizer, with the ego of the company; it is connected to the system: it is connected through a telescope through 1 le e (XMiiii; - with a ventilatory system.

Claims (2)

For ired (1tvran; e1I1 .1b.1eii pylegasou. Yuvitel and annular needle-cuttings Bi ipolneny of heat-resistant steel and operate at temperatures of 1000 ° C and above, in addition, the cylindrical sections of the gas-vaporizer have perforations in the form of a hole for suction of outside air reduces the temperature of the aspirated gas-air mixture to 300 ° C and below. To ensure the necessary movement of perforated cylinders, the latter are made from the bottom and top with an annular flange forming a lock between each pair of cylinders. The proposed device is shown in the form of a general view. An economizer 2 is mounted on the roof of the furnace 1. The flange 3 of the economizer 2 is attached to the flange 4 of a dust and gas catcher 5, made in the form of telescopically articulated connections, with holes 6 along the entire perimeter. which is attached to the annular nozzle 8 rigidly attached to the electrode holder 9. The annular nozzle 8 is connected via a telescopic connection 11 by means of a suction nozzle 10 to a ventilation system 12. During retraction the water of the furnace 1 the lower part of the dust-gas trap 5 is easily disconnected from the flange 3 of the economizer 2. The upper part of the telescopic joint 11 is fixed to the carriage 13, which moves along the rails 14. The device works as follows During the smelting process, overpressure and gases are created in the working volume of the furnace rush to the electrode gaps, where they are caught by the dust-gas catcher 5, then diluted and cooled due to external cold air suction through the openings 6, the gases enter the annular socket 8, then through the suction yuschy pipe 10 and the telescopic connection 11 are sent to the dust and gas cleaning devices. When the electrode moves, the upper part of the telescopic joint 11 fixed to the carriage 13 moves along the guides 14, while sealing the device is not disturbed, since the dust and gas catcher 5, made in the form of telescopically articulated cylinders, changes its dimensions in height, while the suction nozzle 10 by means of the telescopic joint 11 is constantly communicating with the ventilation system 12. When the device is operated, the possibility of dislodging gases through the electrode gaps into the room is excluded, since The structure around the electrode is completely sealed, and, in the upper part of the annular socket 8, additional air leakage occurs, which in turn excludes the use of sealing devices. The device provides suction of small volumes of gas-air mixture, which makes it more economical compared to existing ones and does not require bulky facilities of dust and gas cleaning. During the operation of the electric arc furnace, the device does not interfere with the metallurgical process, since it is not related to the internal volume of the furnace. Claim 1. A device for suction of gases from electric arc furnaces, comprising a water cooled economizer installed on the furnace arch and enclosing an electrode passing through a hole in the arch attached to the electrode holder, a dust trap and a ventilation system with a suction nozzle, characterized in that in order to increase the efficiency of removing dust and gases, cooling them and eliminating them by knocking them out through electrode gaps, the suction nozzle is made annular, rigidly fixed to the electrode and the dust trap is made in the form of a set of telescopically articulated perforated cylinders, the upper one of which is equipped with a flange attached to the ring nozzle and the lower one to an economizer, while the annular nozzle is connected via a telescopic connection to the ventilation system. 2. A device according to claim 1, characterized in that the perforated cylinders at the bottom of the center c are made with an annular flange forming a lock between each pair of cylinders. Sources of information taken into account in the examination 1. Japanese Patent No. 39-3936, cl. 67 J31, 1964. 2. USSR author's certificate No. 358370, C 21 C 5/52, 1970.