SU1638171A1 - Blast furnace tuyere - Google Patents

Abstract

The invention relates to ferrous metallurgy, in particular to equipment for supplying blowing into a blast furnace. The goal is to increase the anti-anxiety resistance of the tuyere due to the intensification of cooling of the lower part of the body. For this purpose, in a blowing lance consisting of an outer 1 and an inner 2 glasses, limited at the ends of the snout part 4 and flange 5 with branch pipes, a longitudinal partition 3 is located along the arc 90-120c in the lower part of the cavity 3 in the sector 90. outer glass. The cavity 3 is divided by an annular partition 10, which cuts off the cavity cavity 11. To provide intensive cooling of the rim of the tuyere, the speed of the cooling water is increased due to the entrance of cavity 11 to the cavity 11 by the guide plate 12. 4 Il. (L

Description

The invention relates to ferrous metallurgy, in particular to equipment for supplying blowing into a blast furnace.

The purpose of the invention is to increase the fire resistance of the tuyere due to the intensification of cooling of the lower part of the body.

Figure 1 shows the tuyere, incision; figure 2 is a view along arrow A in figure 1; on fig.Z - section bb in figure 1; in fig. 4 - section bb In figure 1.

The lance consists of outer 1 and inner 2 cups, forming a cavity 3 between them. Cups 1 and 2 are limited at the ends by a ryl part 4 and a flange 5 with nozzles 6 and 7 for supplying and discharging cooling water. AT

The lower part of the cavity 3 has a longitudinal partition 8, which is a part of the third glass, attached along the axis to the outer two side walls, one of which is made with openings. The glass 1 and the partition 8 form a cooled chamber 9.

The cavity 3 is divided by an annular partition 10, cutting off the nasal cavity 11. To ensure intensive cooling of the ryl part of the mold, the cooling water velocity is increased due to blocking the entrance to the cavity 11 by the guide plate 12 with an opening 13. Supply of cooling ho 00 00

The holes into the lower chamber 9 are carried out by the tube 14.

i

The lance works as follows. Through the blast channel formed by the inner cup 2, a hot blast is fed into the horn of the blast furnace. Through the inlet pipe 6, the pipe 14, the cooling water flows directly into the lower chamber 9, is evenly distributed over its entire surface and through the opening 13 of the plate 12 dividing the flow into two parts, enters the cavity 11, cools the snout and the hole 15, washing the cavity 3, is discharged through the pipe 7.

The design of the tuyere allows you to reliably cool the heat-stressed lower part of the body, which is most heat-resistant to burnout, without a general increase in cooling water consumption, which will increase the service life of the tuyere, i.e., will reduce the stoppage time of the furnace

Claims (1)

lances by 0.2%, and thereby increase the productivity of blast furnaces. Invention Formula A blast furnace tuyere of a blast furnace containing a water-cooled body consisting of two coaxially arranged conical glasses connected at the ends with a flange and a rifle, an annular partition with holes for water inlet and outlet, water inlets for water inlet and outlet, characterized in that , in order to increase the anti-fire resistance of the tuyere due to the intensification of cooling, it is equipped with a partition placed along the longitudinal axis of the tuyere in the lower part of the body in the arc sector of the body equal to 90-120 and attached to the outer The conical cup has two walls, one of which is connected to the inlet pipe, and the other has holes with a total area of 0.2-0.3 sections of the inlet pipe. 1 G1 1 one at 7 6-6 dida Pi / r. 2 Vd