JPS5935562Y2 - Protective liner for blast furnaces, etc. - Google Patents

Description

[Detailed description of the invention] This invention is a basket for blast furnace or CDQ, that is,
This relates to a protective liner used for Konics' dry quench containers.

In a blast furnace, an ore support is installed at the mouth of the furnace to prevent collisions with the charged raw materials and wear due to friction.

However, these days, the ore socket itself often develops holes due to wear, and for this reason, methods have been taken to either partially replace the ore socket itself or provide a protective liner to the ore socket. Since replacing parts of hardware poses operational problems, the method of installing protective liners is becoming more popular.

A liner is also attached to the inner surface of the CDQ basket.

Conventionally, such protective liners have a thick wall thickness of, for example, about 100 mm, with emphasis placed only on wear resistance.
00 to 1100°C, and when exposed to such high temperatures, the liner cannot cope with thermal stress and thermal strain due to its thick wall thickness, and cracks occur even though it is a heat-resistant material.

For this reason, in most cases it is necessary to replace it with sufficient wall thickness.

This idea was made to solve the above-mentioned problems with conventional protective liners.By forming a plurality of unit recesses arranged vertically and horizontally on the back side of the protective liner, the liner can be made thinner, and each Around the four parts of the unit, ribs that intersect vertically and horizontally are formed integrally with the liner, and within these ribs, reinforcing bars are coated with fireproof material and connected by movable joints at the intersections, and are embedded in the casting. This product provides a protective liner that extends the life of the product and prevents it from falling off.

The details of this invention will be explained below based on the attached drawings.

In Fig. 1, 1 is the iron shell of the blast furnace, and 2 is the refractory brick lining it.

Reference numeral 3 denotes a furnace mouth portion, and on the inner side of the lower part, an ore support 4 made of a cast metal with heat resistance in mind is fixed in a multi-tiered manner with refractory mortar 5 or the like.

A protective liner 6 of this invention is fixed to the outside of the ore support 4.

This liner 6 is bent along a plurality of stacked ore supports 4.

By forming a plurality of unit recesses 9 on the back surface of this liner 6, the liner 6 is made thin, and each unit recess 9
The periphery of the liner is made into a rib 7 that is integrated with the liner.

Each of the ribs 7 intersects in the vertical and horizontal directions, but the intersecting portions of the inner ribs 7 are not at right angles, and the liner 6 is made of cast metal in consideration of wear resistance.

Reference numeral 8 denotes a reinforcing bar embedded in the rib 7 by casting, and the reinforcing bar 8 is coated with a refractory material a, such as colloidal silicone, to prevent carburization and adhesion to the base material.

In addition, the connection part of the reinforcing bar 8 in the intersection part of the rib is the fourth
As shown in the figure, by bending into a ring shape and fitting them together, it can be bent and moved freely.

In addition, 10 in the figure is a hanging hole, and 11 is a hanging fitting.

In addition, in the embodiment, the thickness T2 of the liner 6 in the recess 9
is approximately 70 mm, and the height T1 of the rib 7 from the bottom of the recess 9
is approximately 30 mm.

That is, the total height T1,000 T2 of the liner 6 including the ribs 7 is approximately 100 mm, which is comparable to that of a conventional protective liner.

In the case of the above embodiment, the ratio of the thickness T2 of the liner 6 in the recess 9 to the height T1 of the rib 7 is 1 tsubo, which varies depending on the location of use and the size of the liner.

In other words, in the protective line for blast furnaces, 1 stutter is about % to %,
In addition, in the case of a small liner such as a CDQ basket, the value of ↑ is preferably about 5%.

'This invention has the above-mentioned structure, and by providing a plurality of unit recesses 9 on the back surface of the protective liner 6, the protective liner 6 becomes thinner than the conventional one, and the ribs 7 that intersect vertically and horizontally around each recess 9 are formed. At the same time, due to the appropriate cross-sectional shape of the rib 7, the protective liner 6
It is designed to provide sufficient deformation resistance.

Therefore, locally generated thermal stress and thermal strain are absorbed by the unit recesses 9 surrounded by the ribs 7, so that the thickness of the liner 6 in areas other than the ribs 7 can be kept to the minimum necessary.

That is, the wall thickness of the unit recess 9 is reduced,
Since the generated thermal stress and thermal strain are reduced, it is now possible to use a material mainly having wear resistance as the material for the protective liner 6.

Furthermore, since the reinforcing bars 8 are cast inside the ribs 7, even if the protective liner 6 cracks, it will be supported by the reinforcing bars 8 and will not fall off, and the original shape will not be damaged.

In addition, the outside of the reinforcing bars 8 is coated with a refractory material a, and the joints of the reinforcing bars 8 are movably connected, so the reinforcing bars 8 are protected even when the protective liner 6 is cast, and the main body is cooled. Even when contracted, the reinforcing bars 8 are stretchable, so almost no stress acts on them.

The protective liner of this invention is thin as described above, and a small recess surrounded by crisscrossing ribs is formed to reduce thermal stress. By preventing the protective liner from falling off when it occurs, it is possible to use a wear-resistant material, which has the effect of significantly extending the life of the protective liner.

[Brief explanation of drawings]

Figure 1 is a partially cutaway vertical side view of the furnace mouth of a blast furnace using the protective liner of this invention, Figure 2 is an enlarged front view of the protective liner of this invention, and Figure 3 is a vertical side view of the same as above. FIG. 4 is an enlarged perspective view of a connecting portion of the reinforcing bars, and FIG. 5 is an enlarged partially cutaway front view of the reinforcing bars. 6...Protective liner 7...Rib, 8...Reinforcing bar,
a... Fireproof material, b... Connecting part.

Claims (1)

[Scope of utility model registration request] In a protective liner installed in a blast furnace, etc., the liner is made thin by forming a plurality of unit recesses arranged vertically and horizontally on the back surface, and the periphery of each unit recess is formed into a rib that intersects vertically and horizontally and integrated with the liner. A protective liner for blast furnaces, etc., where the ribs are coated with refractory material and embedded with reinforcing bars connected by movable joints at the intersections.