SU990827A1

SU990827A1 - Device for sealing interelectrode space in electric arc furnaces

Info

Publication number: SU990827A1
Application number: SU813335822A
Authority: SU
Inventors: Валерий Иннокентьевич Казюта; Николай Васильевич Моцарь; Людмила Вячеславовна Нагорная; Ольга Яковлевна Гавриленко
Priority date: 1981-09-14
Filing date: 1981-09-14
Publication date: 1983-01-23

Description

(54) УСТРОЙСТВО ДЛЯ УПЛОТНЕНИЯ МЕЖЭЛЕКТРОДНЫХ ЗАЗОРОВ ЭЛЕКТРОДУГОВЫХ ПЕЧЕЙ(54) DEVICE FOR SEALING INTER-ELECTRODE GASES OF ELECTRIC ARTIES

1one

Изобретение относитс к выплавке металла в дуговых электросталеплавильных печах, а именно к устройствам дл предотвращени выброса гор чих газов из сталеплавильных печей через неплотности, между сводом и электродами.The invention relates to the smelting of metal in electric arc furnaces, namely, devices for preventing the release of hot gases from steel furnaces through leakages, between the roof and the electrodes.

Известно уплотнение электродного зазора , представл ющее собой полый усеченный цилиндр с углом наклона основани 6-15° к горизонтали и наружное опорное кольцо, пространство между которыми заполн етс водой 1.An electrode gap seal is known, which is a hollow truncated cylinder with a base inclination angle of 6-15 ° to the horizontal and an outer support ring, the space between which is filled with water 1.

Недостатком этого устройства вл етс низка эффективность, устройство уменьщает зазор, но не ликвидирует его.The disadvantage of this device is low efficiency, the device reduces the gap, but does not eliminate it.

Известно устройство дл уплотнени межапектродных зазоров электродуговых печей, содержащее водоохлаждаемую опорную воронку и металлическую направл ющую воронку, на которой установлены огнеупорные блоки 2.A device for sealing the inter-apex gaps of electric arc furnaces, comprising a water-cooled supporting funnel and a metal guide funnel, on which the refractory blocks 2 are installed.

Недостатком известного устройства вл етс небольша надежность, обусловленна увеличением межэлектроднбго зазора за счет износа блоков в месте контакта с электродом.A disadvantage of the known device is the low reliability due to the increase in the interelectrode gap due to the wear of the blocks at the point of contact with the electrode.

Целью изобретени вл етс повыщение надежности.The aim of the invention is to increase reliability.

Цель достигаетс тем, что устройство дл уплотнени межэлектродных зазоров электродуговых печей, содержащее . водо5 охлаждаемую опорную и металлическую направл ющую воронки, снабжено установленной на направл ющей воронке секторной металлической воронкой со смонтированными в нижней ее части роликами,The goal is achieved by the fact that the device for sealing the interelectrode gaps of electric arc furnaces, contains. the water5 cooled bearing and metal guide funnels are equipped with a sector metal funnel mounted on the guide funnel with rollers mounted in the lower part,

,Q контактирующими с электродом, при этом в нижней части направл ющей и секторной воронок выполнены соосные завалочные отверсти ., Q in contact with the electrode, while coaxial filling holes are made in the lower part of the guide and sector funnels.

На фиг. 1 схематично изображено устройство , общий вид; на фиг. 2 - то .же, видFIG. 1 schematically shows a device, a general view; in fig. 2 is the same

15 сверху; на фиг. 3 - сечение А-А на фиг. 2.15 above; in fig. 3 is a section A-A in FIG. 2

Claims

The device is installed in the arc 1 of an electric arc furnace and contains a water-cooled funnel 2, which can be made of heat-resistant concrete, guides a metal funnel 3 with holes 4 for passageways made of non-magnetic steel, and a sector funnel 5 with holes 6 for passage at the bottom of each sector sector funnel between the lugs 8 are installed rollers 9 in contact with the electrode 10. The mixture enters through chutes 11, a device for sealing the interelectrode gaps of electrons the arc furnace works as follows. The mixture of chutes 11 enters the sector funnel and through holes 4 and b spills under the roof 1 into the furnace, forms an annular shaft in the furnace around electrode 10, and then fills holes 4 and 6 and the funnel formed by the sectors, reaching the bottom cut of leak 11. At melting of the charge simultaneously with the slow lowering of the electrode 10, feeds the top furnace with fresh charge, which continuously enters along the path - estrus 11, sector funnel 5, holes 4. and 6 furnace (top). The spillage of the charge into the gap between the electrode 10 and the funnel 3 is prevented by the presence of a barrier of rollers 9 and a layer of the charge in the path of the charge. A constant, non-destructive boundary layer of the charge, which prevents gas breakdown, is maintained around the electrode. The breakdown of the gas through the holes 4 and 6 for the passage of the mixture prevents the layer of the mixture in the funnel. As the electrode 10 moves downward, the rollers 9, being in constant contact with the electrode 10, rotate, roll around along the electrode. The charge layer retains its position, i.e., the reliability of the sealing of the interelectrode gap is achieved, the gas and dust are thrown into the workshop, the air leaks into the furnace when the pressure in the furnace decreases. Apparatus of the Invention A device for sealing the interelectrode gaps of electric arc furnaces, comprising a water-cooled support and metal guide funnel, characterized in that, in order to increase reliability, it is provided with a sector metal funnel mounted on the guide funnel with rollers mounted in its lower part, contact an electrode, wherein coaxial filling holes are made in the lower part of the guide and sector funnels. Sources of information taken into account in the examination 1. Authors svidete.tstvo USSR № 400787, cl. F 27 D 1/02, 1971.

2. USSR author's certificate, № 523265, cl. C 21 C 5/52, 1975 (prototype).