SU398628A1 - DEVICE FOR METAL BLOWING WITH OXYGEN - Google Patents

Description

one

When the metal is blown through the flame of a torch, formation significantly decreases. However, with a high purge intensity, for example, in an oxygen converter, the amount of smoke generation significantly exceeds the permissible norms, which does not allow in this case to refuse equipment of the converter with devices for fine gas cleaning. In order to maximize the pressure of the smoke formation processes and when flushing the metal with a flame, it is proposed to lower the temperature of the flame by transferring from it a portion of the heat to the slag-forming in any heat exchanger apparatus.

The proposed metal blowing device differs from the known devices, which are tuyeres, in that the tuyere is connected to the tail part with the melting cyclone. This permits the cooling of the flare blow to be lered by an air blower by heating the powder-like materials. In addition, along the axis of the tuyere and the cyclone, a water-cooled rod with a conical butt tip can be passed through, the outside of which is parallel to the cone of the inner surface of the tuyere and forms a blast gap; the size of the gap is controlled by moving the slider 1 along the axis of the tuyere by a moving mechanism mounted on the cyclone cover.

FIG. 1 shows the proposed device, a longitudinal section; in fig. 2 is a section along A-A; FIG. one.

The device consists of two main components: a water-cooled tuyere 1 and a melting cyclone 2. The melting cyclone is connected with the water-cooled tuyere by its lower conical part. The fur.ma consists of an outer water-cooled jacket 3 and the inner part — a water-cooled stem 4 with a tapered head 5. From the opposite end, the stem 4 passes through the gland seal 6 in the lid 7 of the melting cyclone, on which the mechanism 8 is fixed to move along

axles of the tuyere rod 4. The movement mechanism has a remote control. In the tail section of the stem 4 there are nozzles for connecting flexible hoses of water cooling.

In some cases where the spraying is not a significant drawback, the water cooled stem with the conical head is eliminated and the lance is used as a single-neck.

The melting cyclone 2 has an inner jacket 9, lined from the inside with refractory material, and an outer jacket 10, between which water circulates to cool the inner jacket. At the top of the smelter

cyclone tangential inlets are provided for feeding reagents (oxygen, fuel, slag-forming agents) into the cyclone. The mechanism of displacing 8 water chalories fixed on the lid 7 of the melting cyclone; this stem 4 can be adapted, for example, by the principle of a hydraulic cylinder with a piston.

The device works in the following way. The oxygen part of the device. The steelmaking unit is introduced into the space, after which primary oxygen and fuel are started to be supplied to the melting cyclone in a small amount, which are ignited by means of an incendiary device, for example, an electric spark igniter. The burning torch formed, pressed by inertial forces to the inner lined wall of the melting cyclone, is spiraling onto the conical bottom against its central part, which joins the tuyere, coming off the conical bottom, the torch enters the inner cavity of the tuyere; Having reached its head, it is thrown out through the blast gap to the outside and in the form of a discharged cone is blown into the metal.

After zazhngaiichi torch set the operating costs of oxygen and fuel.

The pressure, the iodine of which is supplied to the melting cyclone components by blowing, should not be less than the pressure at which they are fed to ordinary lancers. If the prod with the heating of the slag-forming materials without melting them in a cyclone and a tuyere, immediately after the establishment of the operating mode on the primary oxygen, the slag-forming materials, together with the secondary oxygen, begin to be supplied in the purge mode. Spiral inside

the cyclops of the slag-forming particles will have time to heat to a certain temperature due to the close contact with the torch, simultaneously lowering the temperature of the latter.

The device also allows purging with a torch and in the smelting mode in the smelting mode. In this case, before the latter is fed into the melting cyclone, its lining, as well as the gar.nsazh inside the tuyere

must be well heated by a torch. Before feeding into the cyclone shlakabob; disrupting blast clearance in this case is kept maximum and only after the stationary melting mode of the slag-forming agent is established, this clearance is reduced to the optimum size.

The adjustment of the air gap is carried out by moving along the axis of the tuyere a water cooled brush with a tapered head.

Subject invention

Claims (2)

1. A device for purging: a metal with oxygen with the addition of fuel and powder materials containing a water-cooled The lance, characterized in that, in order to cool the flare blow before blowing, by heating the powder materials, the lance is connected to the melting cyclone with its tail part. 2. The device according to claim 1, characterized in that along the axis of the trucks: we and the cyclone are filled with a water-cooled rod with a conical tip, the outer surface of which is parallel to the conical inner surface of the tuyere and forms a blowing gap, the value of which is controlled by the movement of the rod along the axis of the tuyere by a displacement mechanism mounted on the cyclone cover. / oxygen toplido FPG VaK & fi and shlakoodraz1 / Yush, not at / Fig 2