JPS6031070Y2 - hot stove brick structure - Google Patents

Description

[Detailed Description of the Invention] This invention was devised to prevent damage to the hot-blast stove brick structure, particularly the checker bricks used in the hot-blast stove, at a low cost.

As is well known, three or four hot blast furnaces are usually installed as ancillary equipment to a blast furnace, and the blast furnaces are used for two or three generations.

These hot-blast stoves burn in the furnace for a certain period of time, and the high-temperature combustion gas generated at that time is passed through a heat storage chamber to store heat in the checker bricks inside.When the combustion is finished, a large amount of air is pumped in from outside the furnace to store heat. It is passed between the checkered bricks of the chamber.

During this time, the air sent in takes away the heat stored in the checker bricks, becomes high temperature air, and is blown into the blast furnace.

In a hot blast furnace, such combustion and air blowing are repeated at predetermined intervals, and a combination of three to four blast furnaces stabilizes the supply of high-temperature air to the blast furnace.

The structure of the heat storage chamber of a hot air stove will now be explained with reference to Figure 1. At its bottom, a beam 2 is placed on a support 1 made of heat-resistant cast iron.
A checkered receiving surface plate 3 with ventilation holes provided on the top is constructed,
Checker bricks 4 having similar ventilation holes are laminated thereon.

The checker receiving surface plate 3 is divided into small blocks to simplify the carrying-in work at the time of installation and to suppress the amount of thermal expansion within a certain range, and sufficient gaps are provided between them to allow for thermal expansion. There is.

On the other hand, the conventional layering method for checker bricks 4 is
As shown in Figures 3 and 3, the entire structure up to the lowest level is constructed with checker bricks 4, and especially the lowest level is arranged so as to straddle the gap 5 between the checker receiving face plates 3 and 3. Therefore, the bricks 4 are directly affected by the thermal behavior of the surface plate 3. For example, the bricks 4 are directly affected by the thermal behavior of the surface plate 3.
Due to expansion and contraction of the checker bricks 3, the bottom surface may be severely worn out, and in some cases, the checker receiving surface plates 3 may become different in level due to heat, causing shearing force in the checker bricks 4, resulting in cracks in the bricks 4 above the joints. Cracks were occurring, and this led to a shortened reactor life.

Therefore, as an improvement measure, for example,
However, apart from the effect of extending reactor life, these methods are too large-scale to implement and are not suitable for adoption due to cost. It was something.

This invention was devised to effectively solve these problems, and its feature is that multiple intermediate checker plates are installed on the split checker receiving face plate installed inside the hot air stove. In a structure in which boards are laid and checker bricks at the lowest level are arranged on these intermediate boards, the intermediate board has an outer edge shape that adapts to the outer circumferential plane shape formed by the plurality of checker bricks as a whole. Additionally, checker bricks arranged on the intermediate plate are constructed as one unit.

This invention will be explained below with reference to illustrated embodiments.

Figures 4 to 7 show an example of this, and the struts, beams, and checker receiving surface plates 3 on the beams are constructed in the same manner as described above, and the surface plate gaps 5 between the receiving surface plates 3 are also expanded and contracted in the same manner as described above. It is expressed as.

Further, the ventilation holes 6 and 7 are also provided through both the checker receiving surface plate 3 and the checker bricks 4 so as to communicate with each other, as described above.

However, the intermediate plate 8 has an outer edge shape adapted to the outer circumferential plane shape formed by the plurality of checker bricks, and is placed on the checker receiving surface plate 3 without engaging with it at all. In this way, the plurality of checker bricks 4 are laid down as one unit on the intermediate plate 8, and their joint lines 9 correspond to the surface plate gap 5. It is made by assembling several units side-by-side without being connected.

Incidentally, the intermediate plate 8 is also provided with ventilation holes 10, and in this case, the ventilation holes 10 arranged along the joining line 9 are arranged between the intermediate plates 8 as shown in FIGS. 6 and 7. One of them is formality.

This invention is as described above, and therefore, the intermediate plate has an outer edge shape adapted to the outer circumferential plane shape formed by the entire plurality of checker bricks, and the checker bricks are arranged on the intermediate plate in an appropriate manner. Because of this characteristic, the checker bricks do not cross the gap between the surface plates at any location, and the checker bricks are placed so that they are aligned with the intermediate plate, eliminating the risk of damage through the intermediate plate. In this way, the damage rate of checker bricks can be greatly reduced, and the reduction is very simple and low cost as in the above embodiment, which is advantageous in practice.

The size and thickness of the intermediate plates 8 are determined from the viewpoints of thermal expansion, transportation, handling, etc., and an expansion allowance is provided between the intermediate plates 8.

Further, the intermediate plate 8 is a rustless steel plate (1 to 1 oTIm thick)
is used, but other metal plates may also be used.

[Brief explanation of the drawing]

Fig. 1 is a sectional view schematically showing the structure of a hot air stove, Fig. 2 is a sectional view showing a conventional example, Fig. 3 is a plan view thereof, Fig. 4 is a plan view showing an example of this invention, and Fig. 5 The figure is a cross-sectional view, No. 6
The figures are an enlarged view of section A in FIG. 4, and FIG. 7 is an enlarged view of section B in FIG. 3... Checker receiving surface plate, 4... Checker brick, 5... Surface plate spacing, 8...
intermediate board.

Claims (1)

[Scope of utility model registration request] On the split-type checker receiving surface plate installed inside the hot air stove,
In a structure in which a plurality of intermediate plates having a large number of ventilation holes are laid down, and checker bricks at the lowest level are arranged on these intermediate plates, the intermediate plate is made up of a plurality of checker bricks as a whole. 1. A hot-blast stove brick structure characterized in that the outer edge shape is adapted to the outer peripheral surface shape formed by the hot-blast stove, and checker bricks are arranged on the intermediate plate as a unit.