JPH0240721B2 - KORONOKOSEKIUKEKANAMONONOSHIJISOCHI - Google Patents

Description

[Detailed Description of the Invention] (1) Field of Industrial Application This invention relates to an ore ore, coke, etc. charge provided to protect the blast furnace wall from charges such as ore and coke charged from the charging equipment at the top of the blast furnace. The present invention relates to a supporting device for a receiving metal object.

(2) Prior art As this type of supporting device for ore receivers, the ones shown in Figs. 8 and 9 are known, for example.
In the figure, 101 is the furnace shell of the blast furnace,
A large number of ore receivers 102 are arranged on the inner peripheral surface of the furnace and are supported by a horizontal top plate 105 of a stay plate 103 provided over almost the entire circumference of the furnace. 1
06 is a vertical rib that reinforces the lower part of the top plate 105, and the rib 106 and the top plate 105 are connected to each other by welding to constitute the stay plate 103, and the stay plate 103 configured in this way
Ribs 106 are fixed by welding to the inner circumferential surface of the steel shell 101, facing toward the reactor core. In addition, the top plate 105 of the stay plate 103 is provided over almost the entire circumference inside the furnace as described above, and the top plate 105 is adapted to expand and contract in the circumferential direction due to changes in the temperature inside the furnace (for example, 500°C to 800°C). Therefore, it is divided radially at multiple locations in the circumferential direction. 107 is ore receiver 1
Another vertical stay plate is disposed between the steel shell 101 and the steel shell 101, and is fixed by welding to the inner peripheral surface of the steel shell 101 facing toward the core. The stay plate 107 and the ore support 102 are part of the pull plate mechanism 1
They are connected via 08. Reference numeral 110 denotes a protective liner that covers the inner circumferential surface of the ore support 102, and the liner 110 is a holder provided on the furnace wall with outer ends protruding outside the furnace wall of a plurality of chains 111 whose inner ends are attached to the back side of the liner. By tensioning with a bolt 113 attached to 112, it is attached to the inner circumferential surface of the ore receiver 102 to protect it. 11
Reference numeral 5 denotes a refractory brick that forms the furnace wall below the ore support 102.

(3) Problems to be Solved by the Invention By the way, in the case of the above-mentioned support device, the refractory brick 115 below the ore receiver 102, that is, below the top plate 105 of the stay plate 103,
6, the ribs 106 are separated in the circumferential direction using the ribs 106 as boundaries, and the separation results in a furnace wall structure in which the ribs 106 are contained in the gaps between adjacent refractory bricks 115.

Therefore, as described above, the refractory bricks 115 and the ribs 10 having different coefficients of thermal expansion are arranged alternately in the circumferential direction.
6, due to the wedge effect caused by the difference in thermal expansion due to changes in furnace temperature, the refractory bricks 115 on the furnace wall that encapsulate the ribs 106 fall off compared to the refractory bricks on other furnace walls that do not encapsulate the ribs 106. In addition, the fall of the refractory bricks 115 causes deformation and wear of the ribs 106 of the stay plate 103 and the top plate 105, and as a result, it becomes impossible to support the ore support 102. However, there was a problem in that the ore receptacles 102, which had been stacked up in an orderly manner, would collapse.

Therefore, the technical object of the present invention is to prevent the refractory bricks below the ore receiver from falling off or being damaged as described above due to changes in furnace temperature.

(4) Means for solving the problems In order to achieve the above technical problem, the present invention is characterized by adopting the following technical means. That is, it is equipped with a plurality of stay plates consisting of a vertical plate portion having a length close to almost the entire height of the ore receivers to be stacked, and horizontal plate portions extending a predetermined length outward from both sides of the lower end of the vertical plate portion, These stay plates are arranged around the entire circumference of the furnace, with one end of the horizontal plate part of one adjacent stay plate overlapping the other end of the horizontal plate part of the other stay plate, and vertical. A plate part is fixed to the inner circumferential surface of the furnace shell facing the direction of the reactor core, and a large number of ore supports are stacked in a ring on the horizontal plate part of the stay plate. The plate parts are connected by a pull plate.

(5) Effect By adopting the above-mentioned technical means, there is no need for a rib like the conventional stay plate below the horizontal plate part of the stay plate that supports the ore support, and the fireproofing of the lower part of the ore support becomes unnecessary. Since the bricks can be provided continuously without being separated in the circumferential direction, the refractory bricks will not fall off or be damaged due to changes in the furnace temperature.

(6) Embodiment In Figs. 1 to 4, 1 is a furnace shell, 2 is an ore support, and the ore support 2 is a horizontal plate portion 3b of a stay plate 3 provided almost all around the inside of the furnace. They are supported in an orderly stacked ring. The stay plate 3 is the ore receiver 2, 1, 3,
For the fifth stage, as shown in Figures 5 and 7A,
Stacked ore receptacles 2 with an L-shaped side path
It consists of a vertical plate part 3a with a length close to almost the entire height of the stay plate 3, and a horizontal plate part 3b that integrally projects outward for a predetermined length from both sides of the lower end of the plate part 3a. The vertical plate part 3a is fixed by welding to the inner circumferential surface of the steel shell 1 facing toward the reactor core, with a gap between each side end through which the vertical plate part 5a of the stay plate 5 can pass. . Similarly, the stay plate 5 is connected to 1, 3, and 3 of the ore receiver 2.
For the fifth stage, as shown in Figures 5 and 7B,
It is possible to close the gap formed between the horizontal plate parts 3b of the stay plate 3 outward from both sides of the lower end of the vertical plate part 5a, which has an L-shaped side path and is slightly longer than the vertical plate part 3a of the stay plate 3. , a short horizontal plate portion 5b extends integrally, and is arranged between adjacent stay plates 3 such that the plate portion 5b overlaps the horizontal plate portion 3b from below, and the vertical plate portion 5a and the horizontal plate portion 5b is fixed by being welded to the inner circumferential surface of the iron shell 1 facing toward the reactor core. At the time of this fixing, the distance L of the gap is set so that even if the horizontal plate portion 3b of the stay plate 3 that is not welded to the steel skin 1 expands and contracts in the circumferential direction from the temperature inside the furnace, the amount of expansion and contraction can be absorbed. , the vertical plate portion 5 of the stay plate 5
It is preferable to set the thickness to be approximately midway between the thickness t of a and the width W of the horizontal plate portion 5b.

6 is a stay plate for the 2nd, 4th, and 6th stages of the ore support 2, and as shown in FIG. It is fixed by welding to the inner circumferential surface of the reactor, facing toward the core.

The stay plates 3, 5 and the first, third, and fifth stage ore receivers 2 are connected via a pull plate 8, bolt nuts 10, and the like. The stay plate 6 and the second, fourth, and sixth stage ore receivers 2 are similarly connected via pull plates, bolts, nuts, etc. (not shown). Stay plate 3, 5, 6
Reference numeral 11 in the figure indicates a bolt insertion hole for this purpose.

Reference numeral 13 denotes a protective liner that covers the inner circumferential surface of the third to sixth stage ore receivers 2. The mounting structure of this liner 13 is the same as the conventional one, with a plurality of chains 14, receivers 1
This is done via a bolt 16 attached to 5. A refractory brick 17 is provided below the horizontal plate portions 3b, 5b of the stay plates 3, 5 with a small gap 18 therebetween, so as to constitute a furnace wall below the ore receiver 2. However, in the case of this refractory brick 17, since there is no rib like the conventional one below the stay plates 3, 5, the refractory bricks 17 are not separated in the circumferential direction but are provided continuously over the entire circumference. 1
Reference numeral 9 denotes a refractory layer lining the inner circumferential surface of the iron skin 1.

6A and 6B show another embodiment of the stay plates 3, 5, these stay plates 20, 23 are formed at one side end of the horizontal plate portion 21b of the plate body 21 formed in the same structure as the stay plate 5. Above, a horizontal plate part 2 similar to the horizontal plate part 3b of the stay plate 3 is provided.
One end of 1c is integrally provided via a step 21d, or is connected to the horizontal plate portion 24b of the plate body 24.
One side end of the horizontal plate part 24c is overlaid and fixed by welding on one side end, and the plate main body 2
1 and 24 are welded to the inner circumferential surface of the steel shell 1 facing the core direction (step part 21d, horizontal plate part 21b, horizontal plate part 24
(b is also welded) When fixed, horizontal plate portions 21b, 2 of one of the adjacent stay plates 20, 23
4b, the other stay plate 20, 23 is placed on one end opposite to the horizontal plate portions 21c, 24c.
The other side ends of the horizontal plate parts 21c and 24c are overlapped, and it is now possible to cope with the expansion and contraction in the circumferential direction of the horizontal plate parts 21c and 24c that are not welded to the steel shell 1 due to changes in the temperature inside the furnace. There is. In the case of the stay plate 23, the horizontal plate part 24c is not welded to the horizontal plate part 24b until it is delivered, and after being delivered, it is welded on site or placed between adjacent horizontal plate parts 24b without welding. Good too.

It should be noted that the structure of each stay plate described above is merely an example, and it goes without saying that other structures may be used.

(7) Effects of the Invention This invention is as described above, and since the refractory bricks below the ore receiver will not fall off or be damaged,
Deformation and wear and tear of the stay plate due to these occurrences are eliminated, and the collapse of the ore supports stacked in an orderly ring shape by the stay plate can be completely prevented. The work of stacking bricks becomes much easier, workability is improved, and a robust brick assembly structure can be obtained. In addition, the vertical plate portion of the stay plate, which receives the main load of the ore receivers on the horizontal plate portion, is fixed to the inner circumferential surface of the steel shell with a length close to almost the entire height of the ore receivers to be stacked. The load can be effectively distributed in the direction of the furnace axis of the steel shell through the vertical plate part of the stay plate, and concentrated stress in the circumferential direction of the steel shell does not occur.
It has excellent effects such as eliminating the risk of deformation of the steel shell and maintaining the strength of the furnace wall including the ore support and the refractory bricks below it for a long period of time.

[Brief explanation of drawings]

1 is a longitudinal sectional side view showing one embodiment of the present invention, FIG. 2 is a lateral plan view taken along the line - in FIG. 1, FIG. The figure is a partially exploded front view of the same embodiment as seen from the furnace center to the furnace shell side, FIG. ,B is another stay plate 20,2
Partially expanded front view showing the arrangement relationship of No. 3, Fig. 7A,
B and C are side views of the stay plates 3, 5, and 6, FIG. 8 is a longitudinal sectional side view showing a conventional example, and FIG. 9 is a partially exploded front view taken from the - line in FIG. 8 below. 1... Furnace shell, 2... Ore support, 3, 5,
6... Stay plate, 3a, 5a... Vertical plate part, 3b, 5b... Horizontal plate part, 8... Pull plate, 10... Bolt nut, 13... Protective liner, 14... Chain, 15... Reception Ingredients, 16...
Bolt, 17... Firebrick, 20, 23... Stay plate.

Claims (1)

[Claims] 1. A device for stacking and supporting a large number of ore receptacles in an annular manner on the inner circumferential surface of the furnace shell of a blast furnace, which includes a vertical plate portion having a length close to almost the entire height of the ore receptacles to be piled up, and this vertical plate. A plurality of stay plates are provided, each consisting of a horizontal plate part extending a predetermined length outward from both sides of the lower end of the stay plate. It overlaps the other end of the horizontal plate part and is arranged all around the inside of the furnace,
In addition, a vertical plate part is fixed to the inner circumferential surface of the furnace shell facing the direction of the reactor core, and a large number of ore supports are piled up in a ring shape on the horizontal plate part of the stay plate, and each of the ore supports is A support device for an ore support for a blast furnace, characterized in that a vertical plate portion is connected with a pull plate.