SU985683A2

SU985683A2 - Electric arc furnace

Info

Publication number: SU985683A2
Application number: SU813269431A
Authority: SU
Inventors: Григорий Исаакович Нейжмаков; Дмитрий Васильевич Рагус
Original assignee: Специальный Проектно-Конструкторский Институт
Priority date: 1981-04-06
Filing date: 1981-04-06
Publication date: 1982-12-30

Description

Изобретение относитс к черной металлургии, в частности к устройству дуговых электросталеплавильных печей.The invention relates to ferrous metallurgy, in particular to the arrangement of electric arc furnaces.

По основному авт. св. 916949 известно устройство электродуговой печи, включающее корпус с футеровкой , свод, рабочее окно, закрываемое заслонкой, газоотвод щийпатрубок , при этом свод печи размещен над корпусом с зазором и установлен с образованием кольцевой полости равномерного всасывани , а свод и корпус снабжены кольцевыми крышками/ одна из которых оборудована патрубками с регулируемой арматурой , а друга - обечайкой, обеспечивающей в сборе с крышками фиксацию свода и герметичный затвор кольцевого зазора, и в качестве регулирующей арматуры установлены шиберы 13.According to the main author. St. 916949 a device for an electric arc furnace is known, which includes a lined body, a roof, a working window closed by a damper, a gas outlet pipe, the furnace roof is placed above the body with a gap and installed to form an annular cavity of uniform suction, and the roof and body are equipped with ring lids / one of which is equipped with branch pipes with adjustable fittings, and the other with a shell, which provides for fixing of the vault and a tight shutter of the annular gap assembled with lids, and shells are installed as regulating valves Beers 13.

Недостатком указанного устройства вл етс то, что зазор между сводами и корпусом печи открывает доступ пр мому излучению дуги электродов, что приводит к выходу из стро кольцевых крышек и обечайки, образующих .газоход равномерного всасывани . Кроме того, крупные частицы шлака и футеровки , попада в полость равномерного всасывани , засор ют ее, что снижает эффективность отсоса.The disadvantage of this device is that the gap between the arches and the furnace body provides access to the direct radiation of the arc of electrodes, which leads to the failure of the annular caps and the shell, forming a uniform suction duct. In addition, large particles of slag and lining, falling into the cavity of uniform suction, litter it, which reduces the efficiency of suction.

Цель изобретени - увеличение срог ка службы кольцевых крышек и обечайки и предохранение от засорени полости равномерного всасывани .The purpose of the invention is to increase the service life of the annular caps and the shell and to prevent clogging of the cavity for uniform suction.

Поставленна цель достигаетс тем, что в электродуговой печи, The goal is achieved by the fact that in an electric arc furnace,

10 включающей корпус с футеровкой, свод, рабочее окно, закрываемое заслонкой, и газоотвод адий патрубок, при этом свод печи размещен над корпусом с зазором и установлен с образованием 10 comprising a housing with a lining, a roof, a working window, closed by a flap, and a gas outlet, an Adiy nozzle, while the roof of the furnace is placed above the housing with a gap and installed to form

15 кольцевой полости равномерного всасывани , а свод и корпус снабжены кольцевыми крышками, одна из которых оборудована патрубками с регулируемой арматурой в виде установленных шиберов, а друга - обечайкой, обеспечивающей в сборе с крышками фиксацию свода и герметичный затвор кoлы: Бвoгo зазора, футеровка ванны печи снабжена дополнительным сплошным по диаметру слоем огнеупорной кладки, подн тым над кольцевой крышкой корпуса и образующим защитную стенку.15 annular cavities of uniform suction, and the arch and the body are equipped with annular lids, one of which is equipped with nozzles with adjustable fittings in the form of installed gates, and the other with a shell that provides for the vault fixation and hermetic closure of the valve with lids; lining the furnace bath it is equipped with an additional layer of refractory masonry, continuous in diameter, raised above the ring cover of the case and forming a protective wall.

Кроме того, коль,цевые крышки сIn addition, Kohl, cover caps with

Claims

30 the shell is made of a one-piece construction, the lower plane of which is provided with an ogbortovka adjacent to the protective wall. FIG. 1 shows the proposed oven, general view; in fig. 2, section A-A in FIG. one ; in FIG. 3, nodes 1 in FIG. 1 .. Electric arc furnace contains cor. start 1 with lining, roof 2, collector 2 formed between the casing 1 and roof 2, the gap 4, the protective wall 5, the prefabricated structure b, containing the lower plane 7 and the flange 8, the top cover 9 and the shell 10., The furnace works as follows In the course of operation, the furnaces, which are involved in the smelting of gases, strike the protective wall 5, change the direction of movement, flow around it, which contributes to the separation of large particles of slag and lining, into the furnace bath, fall into the annular gap 4, the assembly collector 3 and removed by the traction unit not shown. The protective wall 5 is placed in the path of radiation of the electric arc, thereby removing the thermal effect of the latter on the assembly structure. B. In order to prevent the protective wall 5 from moving during the operation of the furnace, the lower plane 7 of the modular structure b is equipped with flange 8, which also serves as a template for laying the horizontal wall 5. The proposed electric arc furnace is characterized by increased reliability and durability. Claim 1. Electric furnace, auth.St. No. 916949, characterized in that, in order to increase the service life of the annular lids and shell and to prevent the cavity from being clogged with a uniform suction, the lining of the furnace bath is provided with an additional continuous diameter refractory layer raised above the annular body lid.

2. Furnace according to Claim 1, characterized in that the annular lids with the shell are made of a single structure, the lower plane of which is provided with a flange adjacent to the protective wall; Sources of information taken into account during the examination 1. USSR Author's Certificate No. 916949, cl. F 27 D 3/16, 1980.

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