SU909515A2

SU909515A2 - Electric salt furnace

Info

Publication number: SU909515A2
Application number: SU802935645A
Authority: SU
Inventors: Степан Петрович Петров
Original assignee: За витель С. П, Петров rj
Priority date: 1980-06-04
Filing date: 1980-06-04
Publication date: 1982-02-28

Description

(5) ЭЛЕКТРИЧЕСКАЯ СОЛЕВАЯ ПЕЧЬ(5) ELECTRIC SALT OVEN

II

Изобретение относитс к металлургии цветных металлов, а именно к конструкции электрических солевых печей, примен ющихс дл плавки лома и отходов цветных металлов и вл етс дополнительным к основному изобретению по авторскому свидетельству СССР N- .The invention relates to the metallurgy of non-ferrous metals, namely to the design of electric salt furnaces used for smelting scrap and non-ferrous metal wastes and is complementary to the basic invention according to USSR author's certificate N-.

По основному авт. св. № известна электрическа солева печь, содержаща корпус, футерованный огнеупорным материалом, образующий в нижней части ванну дл жидкого флюсатеплоносител , нагревательные электроды , перемешивающее устройство в виде цилиндрической корзины, на боковой поверхности которой укреплены лопасти и привод коозины, размещенный на крышке ванныAccording to the main author. St. No. an electric salt furnace is known, comprising a body lined with refractory material, forming in the lower part a bath for a liquid flux-heat carrier, heating electrodes, a mixing device in the form of a cylindrical basket, on the side surface of which the blades are fixed and a coosin drive placed on the bath lid

Расплавление исходного сырь осуществл етс по контакту с расплавленным флюсом- теплоносителем. По мере проникновени фпюса вглубь металлической массы происходит неThe melting of the raw material is carried out by contact with the molten coolant flux. As the penetration penetrates deep into the metal mass,

прерывное и значительное снижение температуры флюса. При определенных глубинах проникновени образуетс твердый конгломерат сырь с флюсом, что снижает интенсивность плавлени вторичного металлического сырь , а тем самым и производительность печи. Это вл етс следствием того, что днище корзины выполнено -плоским, а загружаемое в нее сырье формируетс intermittent and significant decrease in flux temperature. At certain depths of penetration, a solid conglomerate of the raw material with a flux is formed, which reduces the melting rate of the secondary metal raw material, and thus the productivity of the furnace. This is due to the fact that the bottom of the basket is flat and the raw material loaded into it is formed

to в виде столбика достаточно большого диаметра, по глубине которого отмечаютс значительные градиенты температуры .to in the form of a column of sufficiently large diameter, over which depth significant temperature gradients are noted.

Цель изобретени - повышение ин15 тенсивности процессов плавлени измельченного лома и отходов цветных металлов.The purpose of the invention is to increase the intensity of the processes of melting crushed scrap and non-ferrous metal wastes.

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

Claims

30 including a bath, heating electrodes, a mixing device, which is fastened inside the interior and made in the form of a rotating basket, ml 39 of the side surface of which are fixed the blades forming the angle between the central axis and the surface of the basket, the bottom of the basket is made in the form of a cone with an opening angle towards the molten flux, and a conic surface with a horizontal plane forms an angle equal to the angle of repose of the metal being melted. FIG. 1 shows a furnace, a longitudinal section; in fig. 2 - the same cross section. The device consists of a bath 1, filled with melt flux 2, an electrode 3 and a rotating basket k. Bath 1 is made of refractory material, for example of refractory bricks, has a bottom 5, an opening 6 for discharging molten metal, an opening 7 for discharging slag, and an opening 8 for a side suction of gases. The hearth 5 is made inclined toward the hole 6. The electrodes 3 are lowered into the molten salt through the sealed holes 9, made on a removable cover 10. The body is made of heat-resistant and salt-melt-resistant material, has a conical side perforated surface on which the blades 11 are fixed, forming the angle with the central axis and the lateral surface of the basket C. The bottom of the tusk 4 is made in the form of a cone, opened towards the melt, and the conical surface with the horizontal plane forms an angle equal to the angle e natural slope of the remelted metal. The basket is attached to a metal ring 12j on the upper part of which the bearing is fixed on c 13 with a ring gear 1 connected to the gear 15 The cage rests on the balls 16 mounted in the ring channel 17 fixed on the beams 18. The reamer is at the top closed with a lid 19 of refractory material. The furnace works as follows. The crushed non-ferrous scrap is loaded into the basket k and is packed in uniform conical layers. The basket of raw materials is introduced into the molten flux 2 heated to 750-800 ° C, the lid 13 is closed and the basket 4 is turned on. When the basket t rotates its blades 11, the flux 2 melts into the basket. At the end of the heat, turn off the drive and remove the basket from the furnace. Having removed the unmelted material, it is re-loaded with raw materials, the melting cycle is repeated. With the same volume of raw materials, changing the shape of the bottom of the basket allows increasing the contacting surface with the raw material by 1, 25 and reducing the thickness of the raw material backfill layer by 25%, which leads to a more uniform temperature distribution across the depth of the device and higher device productivity. The use of the proposed furnace provides an economic effect per 15000 t / g of the smelted metal, about 3 thousand rubles / g. Invention Formula Electric salt furnace according to the author. St. No. in order to increase the intensity of the melting processes of crushed scrap and non-ferrous metal wastes, the bottom of the basket is made in the form of a cone with an opening angle facing the molten flux, the conical surface with a horizontal plane forming an angle equal to the angle of the natural slope remelted metal.