SU863984A1

SU863984A1 - Metallurgical furnace charging door foreplate

Info

Publication number: SU863984A1
Application number: SU782611226A
Authority: SU
Inventors: Николай Степанович Немцов; Вячеслав Степанович Волошин; Федор Дмитриевич Чепик; Александр Евстифеевич Магер
Original assignee: Ждановский металлургический институт
Priority date: 1978-05-03
Filing date: 1978-05-03
Publication date: 1981-09-15

Description

1one

Изобретение относитс к черной металлургии , конкретнее к оборудованию сталеплавильных печей.The invention relates to ferrous metallurgy, more specifically to the equipment of steel-smelting furnaces.

Известна конструкци пороговой плити завалочного окна мартеновской печи, выполненна из огнеупорногоKnown for the construction of the threshold plate of the charging window of an open-hearth furnace, made of refractory

кирпича И- bricks and-

Недостаткеами такой плиты вл ютс низка cTol KocTb и частые ремонты в результате ее разрушени при ударах мульдами во врем завалки печи.The disadvantages of such a plate are low cTol KocTb and frequent repairs as a result of its destruction by blows with troughs during furnace filling.

Наиболее близкой к изобретению по технической сущности -и достигаемому результату вл етс впорогова плита завалочного окна металлургической печи, выполненна в виде цельнолитого металличедкого корпусе с отверс- тй ми дл ее креплени к каркасу печи 2.Closest to the invention by its technical essence, and the achieved result is a threshold plate of the charging window of the metallurgical furnace, made in the form of a one-piece metal-carrying case with holes for attaching it to the furnace frame 2.

Недостатком такой плиты вл етс то, что в процессе эксплуатации она трескаетс при попадании на нее воды из системы охлаждени завалочного окна или другим путем.The disadvantage of such a plate is that during operation it cracks when water from the cooling system of the charging station gets into it or by other means.

Цель изобретени - повышение стойкости плиты.The purpose of the invention is to increase the resistance of the plate.

Поставленна цель достигаетс тем, что на верхней плоскости плиты выполнены углублени в виде чеек, заполненных огнеупорной массой, причем глубина каждой чейки равна 0,100 ,25 толщины плиты, а ширина -- 0,030 , длины плиты.The goal is achieved by the fact that in the upper plane of the slab there are recesses in the form of cells filled with a refractory mass, the depth of each cell being equal to 0.100, 25 plate thickness, and width - 0.030, the length of the plate.

На фиг. 1 изображена плита, вид спереди; на фиг. 2 - то же, вид сверху/ на фиг. 3 - разрез А-А на фиг.1; на фиг. 4 - узел t на фиг. 1.FIG. 1 shows a plate, front view; in fig. 2 - the same, top view / in FIG. 3 shows a section A-A in FIG. in fig. 4 shows the node t in FIG. one.

Порогова плита завалочного окна металлургической печи имеет верхнюю . The threshold plate of the charging window of the metallurgical furnace has the upper one.

10 плоскость 1, в которой выполнены чейки 2 с разделительными металлическими стенками 3, внутри чейки заполнены огнеупорным материалом 4. В корпусе плиты преду смотрены от15 версти дл болтов 5, с помощью которых плита крепитс к стулу 6. В центре плиты на нижней плоскости выполнен клинообразный выступ 7, размещенный , в отверстии 8 стула 6. По сере20 дине клинообразного выступа 7 имеетс горизонтальное отверстие 9, в котором размещен клин 10, ст гивающий плиту со стулом 6i В передней части плиты на нижней ее плоскости 11 разме25 щено ребро жесткости 12. Внутри плиты предусмотрена арматура 13.10 plane 1, in which cells 2 with dividing metal walls 3 are made, inside the cell they are filled with refractory material 4. In the body of the plate there are 15 versts for bolts 5, with which the plate is attached to chair 6. In the center of the plate on the bottom plane is wedge-shaped a protrusion 7 placed in the opening 8 of the chair 6. Along the middle of the wedge-shaped protrusion 7 there is a horizontal opening 9 in which a wedge 10 is placed, tightening the slab with a chair 6i. Stage 12. Inside the slab, fittings 13 are provided.

Устройство работает следувхцим образом .The device works in the following way.

Claims

During operation of the steel-smelting furnace, the threshold plate of the charging unit 30 is heated before and above. In the event of damage to the cooling system of the charging window equipment, it enters the plate and, in contact with the surface of the heated refractory material 4, which is found in cable 2, evaporates its upper layers, not income to the metal part of the plate. At the same time, the refractory material 4 under the influence of thermal loads expands and displaces its layers, cracking individual granules. Due to the fact that the refractory material is loose, the mechanical impact on the walls of the 3 cells is insignificant and does not cause the destruction of the metal part of the threshold plate. At the same time, it is possible to shred about a non-refractory mass. The resulting cavities are subsequently filled with bulk material when the furnace is charged and the false thresholds are added, so the cells are always filled with refractory material. During operation of the charging machine and feeding the molds into the furnace, impacts on the outer face edge of the plate are possible. These impacts are perceived by the bolts 5, the wedge-shaped protrusion 7 and the edge 12, as a result of which the plate does not move away from the installation site. The depth of the cells 2 must be at least 0.1 times the thickness of the plate, since with a smaller thickness the refractory material is knocked out when struck with a tusk on the plate body, as a result of which the metal bottom of cell 2 is exposed and there is a danger of breaking the threshold plate from thermal loads .water. With a depth of cell 2 greater than 0.25 the thickness of the plate, the mechanical strength of the plate is reduced. The width of the cell less than 0.03 of the length of the threshold plate should not be taken, since the total area of the metal partitions between the cells will increase unacceptably, which reduces the efficiency. protection against thermal effects in contact with water. More than 0.15 cell width from the plate length should not be taken, as the refractory mass is knocked out and the protective function of the cells decreases. The proposed design of the threshold plate of the charging window of a metallurgical furnace excludes frequent changes by their working person under high temperature conditions. The economic efficiency of using this threshold plate design is that the duration of such a plate is 3-4 times longer than the known one. The invention The threshold plate of the charging window of a metgitlurgic furnace, having a solid-molded metal shell housing with holes for attaching it to the furnace frame, is different from the fact that and the depth of each cell is 0.10-0.25 of the plate thickness, and the width is 0.03-0.15 of the plate length. e Sources of information taken into account during the examination 1.Sosnenko M.N. Open-hearth steel production. M., Metallurgists, 1969, p. 51.

2.Vinioli I.I. Mechanical and transport equipment steel-making shops. M., Metallurgists, 1972, p. 247.

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