SU621953A1 - Apparatus for loading charge into electric furnace - Google Patents

Description

one

This invention relates to the field of metallurgy, namely to loading devices.

During the operation of electric arc furnaces, mechanized loading of the charge, as a rule, is carried out through the upper part of the electric furnace with the help of an appropriate loading device-loading bucket.

The various designs of the loading buckets are reduced to two main types: with a chain bottom 1 not a grab-type bottom with rigid opening jaws.

A grab-type bad is known, chosen as a prototype, which is a cylindrical body connected by levers with two half-heads of spherical shape by means of fingers.

The large size of the device in the opened state of midnight bars does not allow it to be introduced into the melting space of the electric furnace, and loading the charge from a height leads to the destruction of the lining, which is a big disadvantage of such a tub.

In addition, in loading devices with a large carrying capacity (over 5 to 10 tons), long levers bend. When entering the loading device into the smelting space, the optimum opening angle of the bottom is not ensured.

The purpose of the invention is to ensure reliability and simplify the design.

This is achieved by the fact that the body is made conical with a guide funnel, each of the mid-rims is made as part of a sphere and is equipped with armless earrings, while the fingers are located

at the level of the horizontal axis passing through the center and symmetrically to the vertical axis.

FIG. 1 schematically shows a device for loading; pas figs. 2 - the same

view from above; in fig. 3 shows section A-A in FIG. one.

The device comprises a body 1, made in the form of a truncated cone with a guide conical funnel 2 on top, to which two hemispherical half-bottoms 4 are attached to the body with the help of fingers 3 and fitted with straps 5 for suspension to the body. Each half-bottom on the outside of the part is provided with lugs 6 for fastening them to the traction cross-bar. The horizontal axis О-О and the vertical axis Oi-Oi, at the intersection, form the center of a sphere with radius Kof. The fingers 3 are located at the horizontal level.

the axis of the sphere at the minimum distance from the center of the sphere and symmetrically to the vertical axis. Case 1 has lifting devices 7.

The device works as follows.

The bridge crane to the load gripping device 7 feeds the device for loading into the electric furnace and holds it directly above the hearth. The traverse of the bridge crane for the lugs 6 reveals a half-day, and 4, which with its upper part set on the cone. The mixture is poured out. When lowering the draft, the crosspiece of the noon 4 closes under its own weight.

The proposed device provides input to the melting space of the electric furnace.

The electric furnace is loaded with a mixture at a minimum distance from the bottom of the electric furnace, which prevents it from destruction.

The body, made in the form of a truncated cone, allows to reduce the size of the entire health system, since hemispherical half-bottoms, when opening, enter the cone. The whole device has the ability to be placed in an oven.

The minimum size of the loading device in the open state of noon bottoms ensures the preservation of the wall lining from destruction, thereby saving the lining material, increasing the overhaul time of an electric furnace, and increasing productivity.

The use of a body in the form of a truncated cone, fingers located at the level of the horizontal axis of the midday sphere, as well as hemispherical semi-food allows you to open the bottom at an optimum angle and provide a quick rash without charge loading, reducing loading time, reducing heat loss, which contributes to persistence electric furnace lining and energy saving; to use in the design of the device instead of metal-intensive levers having the ability to bend, earrings of a simplified design, which increases the reliability and service life of the boot device.

Claims (3)

1. USSR author's certificate number 388187, cl. F 27 D 3/00, 1971. 2. USSR author's certificate number 292055, cl. F 27 D 3/00, 1968. 3.Katsevich L.S. Calculation and design of electric furnaces. M., 1959, p. 431. Fig.Z .Z.