SU452593A1 - Blast Furnace Tuyere - Google Patents

Description

one

The invention relates to the field of ferrous metallurgy and can be used in blast-furnace production, in particular in an air tuyere.

Air tuyeres of blast furnaces are known, consisting of a cooled body, partitions in the internal cooled cavity, inlets and outlets for the cooling medium, as well as a natural gas inlet pipe.

However, there are significant losses of heat from hot air (blowing) as a result of heat exchange with cooling water, inadequate mixing of natural gas and, as a result, incomplete combustion and low resistance of the air tuyere (0.3-1.5 months).

The proposed lance is provided with longitudinal screens fixed on the inner wall of the lance body, forming a two-color protective screen, and the tangential gas inlet is made in the form of longitudinal grooves on the lance internal wall, closed with gas-cut nozzles.

FIG. 1 shows a tuyere, a longitudinal section; in FIG. 2 is a section along A-A in FIG. li in fig. 3 — node G for supplying natural gas to the channel for the passage of hot air; (blow); in FIG. 4, node D in FIG. G; in (Fig. 5 - node tH in Fig. 1.

. The air tuyere consists of the outer wall 1 of the housing, the inner wall 2, but 1 ska 3 tuyeres, flange 4, nozzles 5, the supply of natural gas and two-sided longitudinal. wide screens 8.

In the inner wall 2 of the housing there are longitudinal through-thickness walls of the grooves, which on the side of the cooled cavity of the tuyere are closed welded to the wall 2, obliquely cut along the length of the pipe n5 for supplying natural gas.

Trirodial gas from nozzles 5 through (through the first grooves, tangently located in the wall, enters the gaps formed by the longitudinal screens 6 and the wall 2 of the housing body and further to the gaps formed by the adjacent longitudinal screens. gaps rotationally around the longitudinal axis of the tuyere movement, gas

3. -4

It is mixed with a moving stream of th and improvement of heat exchange in the process of grief, of which air is cooled at the same time.

longitudinal screens and wall 2 enclosures. Thus, the longitudinal screens 6 perform the Invention two main functions: they prevent the heat-generating 5gi-tuyere of the blast furnace, which contains an ogmen between hot air and cools the casing with inlets and outlets.

corpus corp. environment, reducing thermal water and pipe supplying natural gas

terry, and an organized rotator is attached to the tuyere channel, which differs from

movement to the natural gas flow, both in order to reduce heat loss

Squeezing a sufficient degree of mixing 10 and improving the mixing of gas with blast,

the latter with a stream of hot air, it is fitted with fixed on the inside

determining the completeness of gas combustion: the wall of the tuyere body with longitudinal screens,

We offer air-cutter-forming two-color protective,

thermal loss with a cooling medium, and a tangential gas injection is made in

improves the combustion of natural gas, increase the length of the longitudinal grooves on the inner wall of the tuyere and the production of tuyere tuyere, closed obliquely cut along

Guna for. by reducing the downtime of the aggregate by the gas inlets.

452593

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FIG. 2

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