JPH04268190A - Furnace wall structure of high temperature burning furnace - Google Patents

Abstract

PURPOSE:To provide a furnace wall structure of a high temperature burning furnace wherein crack or breakage is not produced in the surface layer of the structure even if it is used repeatedly. CONSTITUTION:In a metallic outer board 1, a surface layer 2, an intermediate layer 3 and an inner layer 4 are fixed by means of pins. The layer 2 is made mainly of fiber board for high temperature use and fixed by main pins 5. The intermediate layer 3 is composed of fiber blanket layers and fiber felt layers and fixed to the outer board 1 by auxiliary pins 6 located between the main pins 5. The inner layer 4 is fixed by second auxilary pins 7 located between the pins 5, 6. The motion of the layer 3 which pushes up the layer 2 can be restrained by the pins 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace wall structure for a high-temperature firing furnace used for firing ceramics, etc., in which the inside of the furnace is heated to a high temperature of 1650° C. or higher.

0002

[Prior Art] As a furnace wall structure of the above-mentioned high-temperature firing furnace, as described in Japanese Utility Model Publication No. 1-36077 of the present applicant, a large number of fibers are formed on the inner surface of the metal outer plate of the furnace. It is known that the materials are laminated and fixed to the outer panel using anchor pins. Further, with subsequent improvements, as shown in FIG.
A contrivance is also made to fix several sheets of fiber material constituting the inner surface layer to the outer panel 22 using auxiliary pins 23.

However, in the conventional furnace wall structure shown in FIG. 3, when the temperature is raised and lowered about 20 times, the fiber material forming the surface layer is pushed out by the fiber material forming the inner layer, as shown in FIG. , there was a problem of cracks and cracks occurring. For this reason, it was necessary to frequently replace the fiber material, which caused a decrease in the operating rate of the furnace.

0004

[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems and provides a long-life high-temperature firing furnace that does not cause cracks or cracks in the surface layer even after long-term use. It was completed to provide a wall structure.

[0005]

[Means for Solving the Problems] The present invention, which has been made to solve the above problems, is a high-temperature firing furnace in which a large number of fiber materials are laminated inside a metal outer panel and fixed to the outer panel with pins. In the furnace wall structure of The inner layer is fixed to the outer panel by a second auxiliary pin located between the main pin and the auxiliary pin.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in more detail below with reference to illustrated embodiments. FIG. 1 is a sectional view showing an embodiment of the present invention, and 1 is a metal outer plate similar to the conventional one, and ten fiber materials are laminated on the inside of the furnace. These fiber materials are roughly classified into a surface layer 2, an intermediate layer 3, and an inner layer 4. In addition, each fiber material is, for example, 400 x 600 mm.
It is of a certain size.

First, the surface layer 2 is made of two sheets of fiberboard A.
, B, and a blanket C. These fiberboards A and B have a heat resistance temperature of 1700 degrees Celsius or more, and their thickness is 25 mm in the example.
It is. Moreover, the blanket C has a heat resistance temperature of 1600°C. These surface layers 2 are fixed to the outer panel 1 by a large number of main pins 5 made of alumina, as in the conventional case. Note that, as shown in FIG. 2, these main pins 5 are attached to the surface layer 2.
are placed along the edges of the fiber material.

The intermediate layer 3 includes two blankets D and E,
It is composed of two felts F and G. Blanket D has a heat resistant temperature of 1500°C, and blanket E has a heat resistant temperature of 1400°C. Also felt F, G
has a heat resistance temperature of 1400° C., and these intermediate layers 3 are fixed to the outer plate with auxiliary pins 6. This auxiliary pin 6 is also made of alumina, and is arranged at an intermediate position between the main pins 5, 5, as shown in FIG. Further, as shown in FIG. 2, the intermediate layer 3 is laminated with a half pitch shift from the surface layer 2.

The inner layer 4 is composed of blankets H and I and a board J. Blanket H and I are 1250℃
These inner layers 4 are fixed to the outer panel 1 by second auxiliary pins 7 such as metal stacks. This second auxiliary pin 7 is made of metal because
Even if the temperature inside the furnace reaches 1700℃, the temperature of the inner layer 4 is at most 5℃.
This is because the temperature remains at about 00 to 700°C, and there is no need to use expensive ceramic pins. Note that, as shown in FIG. 2, this second auxiliary pin 7 is also arranged at an intermediate position between the main pin 5 and the auxiliary pin 6.

0010

[Function] The furnace wall structure of the high-temperature firing furnace of the present invention configured as described above is used in ceramic firing furnaces etc. where the temperature inside the furnace is as high as 1650°C or higher, and the outer plate 1 is heated according to the temperature distribution.
The fiber materials of the surface layer 2, intermediate layer 3, and inner layer 4, which are laminated on the surface layer 2, can exhibit an excellent heat insulating effect. In addition, in the present invention, the entire fiber material is roughly divided into three layers and each layer is fixed with a pin, so that the movement of the intermediate layer 3 located below the surface layer 2 and pushing up the surface layer 2 is assisted. It is restrained by pin 6. For this reason, the furnace wall structure of the present invention does not cause cracks or cracks in the surface layer 2 even when the temperature is repeatedly raised and lowered, and according to the applicant's company's track record, the furnace wall structure of the present invention can be raised and lowered more than 60 times, three times as many times as before. However, no more than that is permitted.

Furthermore, in the furnace wall structure of the high-temperature firing furnace of the present invention, the main pin 5, the auxiliary pin 6, and the second auxiliary pin 7 are arranged at intermediate positions, so that the movement of each layer can be effectively controlled. can be suppressed to the outside plate 1 through the pins.
It is possible to disperse the heat transmitted to the Furthermore, since the surface layer 2 of the furnace wall structure of the high-temperature firing furnace of the present invention is mainly composed of fiberboard, it has the effect of preventing internal fiber pieces from adhering to the surface of the fired product.

0012

Effects of the Invention As explained above, even when the present invention is used in a furnace where the temperature inside the furnace is as high as 1650°C or higher, no cracks or cracks occur in the surface layer, and the service life is 3 times longer than that of the conventional one. It can be more than doubled. This not only improves the operating rate of the furnace, but also reduces fuel costs due to its excellent insulation effect.
Since the inner layer 4 is individually secured with pins, there are advantages such as ease of construction. Therefore, the present invention greatly contributes to the development of industry as a furnace wall structure for high-temperature firing furnaces that solves the problems of the conventional art.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a sectional view of a conventional furnace wall structure.

FIG. 4 is a cross-sectional view showing a drawback of a conventional furnace wall structure.

[Explanation of symbols]

1 Outer panel 2 Surface layer 3 Middle class 4 Inner layer 5 Main pin 6 Auxiliary pin 7 Second auxiliary pin

Claims (1)

[Claims] Claim 1: A furnace wall structure for a high-temperature firing furnace in which a large number of fiber materials are laminated inside a metal outer plate and fixed to the outer plate with pins, the surface layer being mainly made of fiberboard that can withstand high temperatures. The intermediate layer consists of a fiber blanket layer and a fiber felt layer and is fixed to the outer panel by an auxiliary pin placed between the main pins, and the inner layer is fixed to the outer panel by a main pin and an auxiliary pin. A furnace wall structure for a high-temperature firing furnace, characterized in that it is fixed to an outer plate by a second auxiliary pin located in the middle.