SU1298501A1 - Arc electric furnace - Google Patents

Abstract

The invention relates to metallurgy, in particular to the design of electric arc furnaces. The purpose of the invention is to reduce the metal content, increase the performance of the electric arc furnace. The electric arc furnace comprises a body 1 in the form of a truncated ball sphere, and a turning (tilting) mechanism, the axis of the trunnions 3 of which coincides with the horizontal axis of the ball sphere {m, which is formed in the assembly of the housing 1 and the roof 5. The ratio of the height of the body to the radius of the sphere is within 1.2-1.7. The ball shape of the electric bath allows the maximum use of its volume under the melting LnpocT space, to have the most rigid CONCLUSION

Description

1298501 the structure of the housing, to reduce the metal content passing through the center of the ball sphere.

bone. The location of the axle axle 3 of the rotation mechanism on the horizontal axis ..

gives the furnace stability when it comes to turning to the required angle. 2 s. ff, 2, and

The invention relates to ferrous metallurgy, in particular, to designs of electric arc furnaces, smelting steel and ferroalloys.

The purpose of the invention is to reduce the metal capacity, increase the performance of the electric arc furnace.

FIG. 1 depicts the proposed arc furnace; in fig. 2 is a view A of FIG. one.

The electric arc furnace comprises a housing 1 made of a metal of calculated thickness, in the form of a truncated ball sphere, a turning mechanism (on a clone), including flanges 2, trunnions 3 and a drive 4, roof 5 of an electric furnace made of metal of a calculated thickness, in the form of a truncated ball sphere with a hole 6 for the passage of the electrodes 7, the working window 8 and the pipe 9 of the gas suction.

The mechanism 10 for fastening and moving the electrodes is installed on the foundation 11. A steel discharge chute 12 is located in the upper part of the furnace body 1 on the truncation line of the ball sphere of the body. An inclined chute is provided for loading charge materials.

The body and the arch, made in the form of truncated ball spheres, assembled to form a ball sphere, and the ratio of the height of the body to the radius of the sphere is 1.2-1.7.

The lower truncation limit, equal to 1.2, is dictated by the condition of placing the flanges of the pivots of the turning mechanism so that the distance from the axis of the spherical sphere to the truncation plane is greater than the radius of the flange.

The upper limit of 1.7 was chosen so that the truncation diameter was larger than the decay diameter of the electrodes and ensured the placement of the gas suction nozzle and the working window in the electric furnace.

gives the furnace stability when turning to the required angle. 2 s. ff, ly, 2 Il.

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five

The arrangement of the axles of the axles of the rotation (inclination) mechanism on the horizontal axis passing through the center of the spherical sphere makes it possible to have reliable stability of the electric arc furnace when rotating (inclining) 90 or more due to the constant projection of the center of gravity. The location of the working window in the roof provides high-quality control of the laying of the furnace bottom, which reduces the convenience of refueling the furnace. All this allows to reduce the metal intensity of the furnace and increase its productivity.

Arc electric works as follows.

Slag-forming charge materials on the inclined chute through the working window 8 is loaded on the furnace bottom with lowered electrodes. After filling, the charge is melted, and the resulting flue gases are sucked out from under the roof through pipe 9. After melting through the working window 8, a sample is taken, the electrodes 7 are raised to the upper position so that the lower end of the electrodes goes beyond the circle of the ball sphere projection onto the plane of movement electrodes. By means of a turntable, the furnace body is rotated towards the steel discharge chute 12 and through it is drained into the slag slag and then the metal. The furnace body can rotate up to 90 without losing stability. After the slag and metal are drained, the furnace is rotated to its original position, the furnace lining is inspected and, if necessary, the bottom and slopes are welded, the electrodes are lowered, and the next filling of charge materials is performed.

The proposed electric arc furnace allows you to have the most rigid structure using its geometry, thereby reducing the metal intensity of the electric furnace, as well as improving working conditions with heat engineering

point of view by reducing the heat transfer surface.

Claims (3)

1. An electric arc furnace, comprising a housing, pins, a tilt mechanism, a roof, a working window, characterized in that, in order to reduce metal consumption, increase productivity, the housing and roof of the electric furnace are made in the form of truncated &and ball spheres forming a ball sphere assembly, and the ratio of the height of the body to the radius of the sphere is in the range of 1.2-1.7. 2. The electric furnace according to claim 1, wherein the axis of the pivots of the tilt mechanism is on the horizontal axis passing through the center of the ball sphere, 3. Electric furnace according to claim 1, which means that the working window is located in the roof of the furnace. % Editor S. Patrushev Compiled by A. Filippov Tehred M. Khodanich Proofreader M. Samborska Order 874/39 Tiazh 544Subscribe VNIIPI USSR State Committee for inventions and discoveries 113035, Noskva, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4