CN213012931U - Blast furnace hearth furnace belly transition device - Google Patents

Abstract

The utility model relates to a blast furnace hearth furnace belly transition device, it mainly by the blast furnace hearth, the blast furnace hearth and the brickwork that constitutes the hearth furnace belly constitute, installation angle beta through the furnace belly cooling wall is different with blast furnace belly angle alpha, and the reasonable linking mode of furnace belly cooling wall and hearth cooling wall, it is unreasonable to effectively solve linking at hearth furnace belly transition position, lead to burning out of cooling wall, leak, arouse the blast furnace damping down or blowing out and overhaul, and then reduce the problem of blast furnace life-span, be fit for newly-built and reform transform the project popularization at each iron and steel enterprise blast furnace body.

Description

Blast furnace hearth furnace belly transition device

Technical Field

The utility model relates to a blast furnace hearth belly transition device belongs to blast furnace ironmaking equipment field.

Background

The long service life of the blast furnace is a system project and relates to the aspects of design, construction, production, maintenance and the like. The purpose of the long-life design of the blast furnace is to adopt advanced design technology and concept and lay a foundation for realizing the long life of the blast furnace.

From the system level, the long-life design of the blast furnace is the organic combination of the inner type of the blast furnace, the lining structure, the cooling system and the automatic detection. The long service life of the blast furnace can be really realized by combining a reasonable blast furnace inner type, a scientific lining structure, strengthened blast furnace cooling and a perfect monitoring system.

The factors influencing the long service life of the blast furnace can be divided into two aspects: on one hand, the method is a restrictive link, mainly refers to a furnace bottom hearth, is a key for determining the service life of the blast furnace, and can realize the real long service life of the blast furnace only by solving the long service life problem of the restrictive link; on the other hand, the method is a non-limiting link, and although the method is not the most main factor for determining the service life of the blast furnace, attention is paid to the method so as to realize synchronous long service life of all parts of the blast furnace.

At present, most of large and medium blast furnaces in China adopt a brick wall integrated thin-wall lining structure, and the transition parts of a hearth and a furnace belly are properly processed due to the discontinuity of angles and the difference of wall thickness, so that the service life of cooling equipment in the region is determined. In practice, the unreasonable connection between the cooling wall of the furnace bosh and the cooling wall of the tuyere brings great influence on the operation of the blast furnace, so that equipment at the joint part of the cooling wall of the furnace bosh of the furnace hearth is burnt and leaked, and even damping down and furnace shutdown maintenance are caused.

For a blast furnace with a thin-wall inner type design, the key to the problem of breakage of the brick lining of the copper cooling wall in the furnace belly region is to excessively pursue that the hot surface of the brick lining is consistent with the inner molded line of the blast furnace, and the installation angle of the copper cooling wall in the furnace belly region is consistent with the designed furnace belly angle. The installation angle of the copper cooling wall in the furnace belly area is completely consistent with the furnace type angle, and the brick lining on the upper part of the cast iron cooling wall in the tuyere area is easy to be thinned. When the brick lining of the convolution area at the upper part of the tuyere is too thin, the high-temperature convolution airflow at 1800-2000 ℃ directly approaches the tuyere with cast iron cooling wall, and the cast iron of the cooling wall is melted when the temperature is serious.

In view of the above circumstances, the present invention provides a blast furnace hearth belly transition device, which aims to solve the problem of the reduction of the service life of the transition part of the blast furnace hearth belly caused by the unreasonable structural design and the insufficient cooling.

Disclosure of Invention

The utility model aims at: the utility model provides a safe, reliable blast furnace hearth furnace belly transition device, its purpose is solved the link up of hearth furnace belly transition position unreasonable, leads to burning out, leaking of stave, causes the blast furnace to stop the wind or the blowing out of the furnace overhauls, and then reduces the problem of blast furnace life-span.

The utility model discloses main design: the installation angles of the furnace belly angle and the cooling wall of the blast furnace are set to be two different angles, so that an erosion line of a funnel paraboloid is arranged between the inner profile of the furnace belly and the hot surface of the cooling wall. Enough space for forming slag crust is reserved on the hot surface of the furnace hearth cooling wall, so that the stable existence of the slag crust can be ensured, and the scouring erosion of high-temperature rotary airflow to the cooling wall at the joint part of the furnace hearth and the furnace hearth can be avoided.

The technical scheme of the utility model: a blast furnace hearth belly transition device mainly comprises a blast furnace hearth belly, a blast furnace hearth, a hearth belly wall and a hearth furnace wall, wherein the hearth belly wall and the hearth furnace wall form the hearth belly, and the blast furnace hearth belly is arranged at the upper part of the blast furnace hearth. The furnace hearth wall sequentially comprises a furnace shell, an unshaped refractory material A, a furnace hearth cooling wall, an unshaped refractory material B, a furnace hearth lining and the like from outside to inside; the furnace chamber and furnace wall sequentially comprises a furnace shell, an indefinite refractory material A, a furnace chamber cooling wall, a cooling wall brick, a furnace chamber lining and other members from outside to inside, and is characterized in that:

1) the installation angle beta of the furnace bosh cooling wall is different from the furnace bosh angle alpha of the blast furnace, and the beta angle is larger than the alpha angle;

the erosion line of the funnel paraboloid is arranged between the inner molded line of the furnace belly and the hot surface of the cooling wall, so that high-temperature whirling airflow caused by thinning of the brick lining at the upper part of the tuyere combination brick can not burn the cooling wall of the furnace hearth. 2) The horizontal distance a between the bottom end point B of the hearth cooling wall and the outer end point A of the top end of the hearth cooling wall is not less than 100mm, or is not less than 100 and not more than 200, and the aim is to ensure that the joint of the hearth cooling wall and the hearth fireplace does not have a cooling blind area in actual production, thereby causing burning loss of the cooling wall.

Furthermore, the brick inlaying structure of the cooling wall of the furnace bosh is formed into a concave-convex form, so that the hot surface of the cooling wall of the furnace bosh is easier to hang slag, and the stable slag crust is formed.

The utility model discloses the main beneficial effect who produces lies in:

1. can effectively solve the problems that the blast furnace is shut down or stopped for maintenance and further the service life of the blast furnace is shortened due to the burning and water leakage of a cooling wall caused by the unreasonable connection of the transition part of the hearth and the hearth belly

2. The brick embedding structure of the cooling wall of the furnace bosh is formed into a concave-convex form, so that the hot surface of the cooling wall of the furnace bosh is easier to hang slag, and the stable slag crust is formed.

Drawings

The utility model discloses there are 2 pages of attached drawings, totally 2.

Fig. 1 is a schematic diagram of embodiment 1 of the present invention.

FIG. 2 is an enlarged schematic view of local I in embodiment 1 of the present invention

The labels in the figures illustrate: 1-blast furnace bosh; 2-blast furnace hearth; 3, furnace shell; 4-furnace bosh cooling wall; 5, embedding bricks on the cooling wall; 6-lining of furnace bosh; 7-monolithic refractory A; 8-lining of the hearth; 9-hearth cooling wall; 10-unshaped refractory B; 11-funnel parabola; a, the end point of the bottom end of the cooling wall of the furnace bosh; b, the top end point of the cooling wall of the hearth.

Detailed Description

The present invention will be described with reference to the following embodiments and drawings.

This embodiment is shown in FIG. 1.

The utility model relates to a blast furnace hearth belly transition device, which mainly comprises a blast furnace hearth belly 1, a blast furnace hearth 2 and a furnace wall forming the hearth belly, and the blast furnace hearth belly is on the upper part of the blast furnace hearth. The furnace wall of the furnace hearth consists of a furnace shell 3 of the blast furnace, an unshaped refractory material A7, a cooling wall 9 of the furnace hearth, an unshaped refractory material B10 and a tuyere combination brick 8 from outside to inside in sequence; the furnace chamber and furnace wall sequentially comprises a furnace shell 3, an indefinite refractory material 7, a furnace chamber cooling wall 4, a cooling wall inlaid brick 5, a furnace chamber lining 6 and other components from outside to inside, and is characterized in that: the installation angle beta of the furnace bosh cooling wall 4 is different from the furnace bosh angle alpha of the blast furnace, and the angle beta is larger than the angle alpha, so that the main purpose is to place an erosion line 11 of a funnel paraboloid between the inner profile of the furnace bosh and the hot surface of the furnace bosh cooling wall 4, and the furnace bosh cooling wall 9 cannot be burnt by high-temperature circular airflow caused by the thinning of the upper part of the furnace hearth lining 8; in addition, the horizontal distance a between the end point B at the bottom of the furnace hearth cooling wall 4 and the end point A at the outer side of the top end of the furnace hearth cooling wall 9 is not less than 100mm, or a is not less than 100 and not more than 200, so that the aim of ensuring that the connecting part of the furnace hearth cooling wall and the furnace hearth cooling fireplace does not have a cooling blind area in actual production, and further burning loss of the cooling wall is caused.

Furthermore, the cooling wall brick 5 of the cooling wall 9 is in a concave-convex structure, so that the hot surface of the cooling wall 9 is easier to stick slag, and the stable slag crust is formed.

It should be noted that: the above embodiments are all individual cases of the present invention, and one of their functions is to facilitate understanding of the present invention, and should not be considered as limiting the present invention.

Claims (1)

1. A blast furnace hearth belly transition device mainly comprises a blast furnace hearth, a hearth belly wall and a hearth wall, wherein the hearth belly wall and the hearth wall form the hearth belly; the furnace chamber and furnace wall sequentially comprises a furnace shell, an indefinite refractory material A, a furnace chamber cooling wall, a cooling wall inlaid brick and a furnace chamber lining from outside to inside, and is characterized in that:

1) the installation angle beta of the furnace bosh cooling wall is different from the furnace bosh angle alpha of the blast furnace, and the beta angle is larger than the alpha angle;

2) the horizontal distance a between the bottom end point B of the furnace bosh cooling wall and the outer end point A of the top end of the furnace hearth cooling wall is not less than 100mm, or a is not less than 100 and not more than 200.

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