SU632734A1 - Device for blowing liquid steel with inert gases - Google Patents

Description

one

The invention relates to ferrous metallurgy, in particular, to devices for treating steel in a ladle with inert gases.

A device for injecting a liquid metal with inert gases is known, which allows treating the liquid metal with an inert gas supply from above the ladle and consists of a cantilever-swiveling crane, a boom with a carriage, a boom swinging mechanism, a vertical movement mechanism of the boom carriage, a tuyere locking mechanism, a deflection mechanism ( jypmy in a vertical plane at an angle of 15 and furnaces for heating the tuyere of the operating temperature ij. Oanako this device is characterized by the complexity of the design, the presence of a large number of actuators, the work which are complicated by the aggressive environment and high temperature, high cost and limited zopo metal blowing.

The aim of the invention is to increase the area of metal blowing with the same volume of inert gas, improving the quality of the metal, compact design, maintenance and reliability in operation, as well as reducing costs.

. The goal is achieved by the fact that the device is equipped with a counterweight mounted on a tuyere hinged to the console, and stops that limit the inclination of the tuyere to 5-15; located on the console, hinged to a fixed support. In order to protect the blower from thermal steam and to heat it up to the operating temperature, the console is U-shaped and provided with a lower open part

hinged lid.

FIG. 1 shows the proposed device; in fig. 2 - the same, node T on 4d1G. one; in fig. 3 - the same, section A-A in FIG. one.

The device consists of

Claims (2)

cantilever 1 pivotally attached to the structures of the building of shop 2 uiafiiniposf 3, which ensures that the coisote 1 is vertically aligned; a) we) supplying inert gas to a liquid metal, connected to console 1 by means of an insulator 5, on which counter load 6 is fixed, which holds the lance 4 in the working position when processing the liquid metal; adjusting stops 7 fixed on the cantilever 1, limiting the movement of the counterweight 6 and preventing the lance 4 from floating up from the cantilever 1. The immersion height of the tuyere 4 into the liquid metal 8 is adjusted by the lock nut 9; The otduskanna and lifting the console 1 is made by a winch 10. In order to give the console 1 the functions of a thermostat, it is (full U-shaped; its inner walls are lined with refractory thermal insulation material 11, and the fourth wall is made in the form of a hinged cover 12. The device works in the following way. When the U-shaped console 1 is winched by the Yu through the hinge 3 from the vertical position to the horizontal blowing duct 4, it is rotated on the hinge 5 by means of its own weight and the counter-load 6, while retaining vertical position. At the same time, the counterweight 6 imparts to the tuyere 4 an initial inclination in the liquid metal at an angle of 5-15 and prevents its ascent towards the console 1. When the tuyere 4 emerges from the console 1, the counterweight 6 approaches the adjustable stops 7, and thereby fixes the working position tuyere 4. The immersion height of the tuyere 4 into the liquid metal 8 is regulated by a lock nut 9, which makes the blowing process more flexible and efficient. In order to protect the tuyere 4 from thermal shocks, when it returns to its original position, it self-aligns chuck 63 4 in the U-shaped cantilever 1, the inner walls of which are lined with refractory heat insulating material 1 of the material 11, and the fourth wall is made in the form of a closing cover 12. The gas line to the tuyere 4 is fixed on the outside of the cantilever. The use of the described device makes it possible to increase the metal processing zone in the ladle, shorten the blowing time, improve the quality of the metal, reduce the capital cost of construction, and obtain a compact structure. Claim 1, A device for sealing liquid steel with inert gases, comprising a console with a tuyere mounted on it connected to a displacement drive, characterized in that, in order to improve the quality of the metal, reduce the time for purging and reduce the capital cost of equipment, it is equipped counterweight mounted on the tuyere. pivotally connected by the console, and stops, limiting the slope of the tuyere on 5 - 15; located on the console, hinged to a fixed support. 2. The device according to claim 1, wherein the console is U-shaped and provided with a hinged lid located in the lower open part. Sources of information taken into account in the examination: 1, A device for flushing liquid steel with an inert gas. Project Gipromeza on the technical task T-89888, drawing number B 21655, M., 1973.