JPS6242234B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves placing an object to be heated on a cart that also serves as a hearth, bringing it into a furnace, and heating it using a gas burner attached to the furnace wall. This article relates to a construction method for constructing a relatively large heating furnace.

[Prior art and its problems] The walls of relatively large heating furnaces as described above are constructed by laminating a combination of refractory bricks and insulating bricks, or by constructing a combination of monolithic refractory material, insulating bricks, and boards. For this reason, thermal strain absorption is not sufficient, and cracks and deformation often occur in the furnace wall over time, resulting in the disadvantage that construction takes a long time. In addition, bricks used as a heat insulating material for furnace walls have the disadvantage that their heat resistance is not very good.

Furthermore, in the case of brick masonry as described above, if a problem occurs internally, the surrounding bricks must be removed and repaired, or the entire surrounding bricks must be replaced. The disadvantage is that it takes a lot of time and money.

[Object of the present invention] The present invention is proposed in view of the above points,
The purpose of this project is to propose a method for constructing furnace walls that has the following characteristics: easy construction, resistance to cracks over time, easy repair, and good insulation. .

[Configuration of the present invention] The configuration of the present invention proposed to achieve the above object is as follows.

A process of constructing an iron furnace frame on the outside where the furnace body is to be constructed; Inside the furnace frame, a hanging pipe is arranged in the depth direction on the ceiling side of the furnace frame, and an iron plate is installed on the side wall side of the furnace frame. a step of stretching a casing; a step of attaching a grooved furnace wall holding column to the hanging pipe and the iron plate casing toward the inside of the furnace; and a step of attaching a furnace wall holding column from the inside surrounded by the furnace wall holding column. a step of placing mineral wool on the outermost layer of the wall; a step of placing a ceramic blanket inside the mineral wool; a step of placing a ceramic board inside the ceramic blanket; Frame boards are placed at intervals on the inside of the ceramic board and on the inner surface of the furnace.
A method for constructing a furnace wall in a heating furnace, comprising the steps of: filling a plastic refractory material between the frame plate and the ceramic board while compacting it to form a furnace inner wall; and finally removing the frame plate.

[Example] A specific example of the construction method according to the present invention will be explained based on FIGS. 1 and 2.

First, an iron furnace frame 1 is constructed at the location where the furnace is to be constructed. An inclined frame 2 is attached to the upper corner of the furnace frame 1 as necessary to match the shape of the furnace wall.

Next, a hanging pipe 3 is attached to the inner side of the ceiling part of the furnace frame 1 in the depth direction, an iron plate casing 13 is stretched on the side wall part, and a supporting metal fitting 14 is attached to the inner side of the iron plate casing 13. In addition, this hanging pipe 3
The spacing is narrower on the ceiling side of the furnace, and wider on the supporting metal fittings 14 on the side wall side of the furnace.

Next, a refractory furnace wall holding column 4 having a groove 5 formed on its surface is suspended from the hanging pipe 3 and the support fitting 14 using a hanging fitting 6. Note that the hanging intervals of the furnace wall holding columns 4 are narrow on the ceiling side and wide on the side wall side of the furnace.

Next, mineral wool 8 is stretched over the outermost layer of the furnace wall. Next, a ceramic blanket 9 is stretched in contact with the inside of the mineral wool 8.

Next, a ceramic board 10 is stretched in contact with the inside of the ceramic blanket 9.

Next, frame plates 11 are stretched around the inner surface of the furnace wall at intervals, and plastic refractory material 12 is filled inside the frame plates 12 while being tamped from the direction of the gap between the ceramic board 10 and the frame plate 11 to form the inner wall of the furnace. Form.

When the above construction is completed and the entire structure is solidified, the frame plate 11 is removed and the construction of the furnace wall is completed.

[Effects of the present invention] As described above, the present invention does not involve stacking firebricks, but instead first attaches mineral wool 8, ceramic blanket 9, and ceramic board 10 in order from the outside of the furnace to the inside, and then Since the inner wall of the furnace is constructed by compacting the plastic refractory material 12, construction is extremely simple compared to construction in which refractory bricks are piled up one by one.

In addition, the plastic refractory material 12 is placed on the inner surface, and then the ceramic board 10, the ceramic blanket 9, and the mineral wool 8 are stacked to form four different layers, so each layer (material) Thermal stress caused by the heating is absorbed and synergized with each other, making it possible to construct a furnace wall that is resistant to cracks and highly refractory.

Furthermore, in the event that a crack occurs, it can be easily repaired by injecting a fireproof filler into the crack. Therefore, there is no need to stop the operation of the furnace for a long period of time during repair, as is the case with firebrick masonry. Also, repair costs are extremely low.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the entire furnace showing the construction method according to the present invention, FIG. 2 is a sectional view of the furnace ceiling wall, and FIG. 3 is a sectional view of the furnace side. DESCRIPTION OF SYMBOLS 1... Furnace frame, 3... Hanging pipe, 4... Furnace wall holding column, 8... Mineral wool, 9... Ceramic blanket, 10... Ceramic board, 11
...Frame board, 12...Plastic fireproof material, 13...
...Iron plate casing, 14...Supporting metal fittings.

Claims (1)

[Claims] 1. A step of constructing an iron furnace frame on the outside where the furnace body is to be constructed, and a step of arranging a hanging pipe in the depth direction of the ceiling side of the furnace frame inside the furnace frame, a step of stretching an iron plate casing on the side wall side of the frame; a step of attaching a grooved furnace wall holding column toward the inside of the furnace to the hanging pipe and the iron plate casing; A step of stretching mineral wool from the enclosed inside to the outermost layer of the furnace wall, a step of stretching a ceramic blanket inside the mineral wool, and a step of stretching a ceramic board inside the ceramic blanket. a step of placing frame boards at intervals on the inside of the ceramic board at positions that will become the inner surface of the furnace;
A method for constructing a furnace wall in a heating furnace, comprising the steps of: filling a plastic refractory material between the frame plate and the ceramic board while compacting it to form a furnace inner wall; and finally removing the frame plate.