JPH0429356Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a kiln car used in a tunnel type kiln.

(Prior art) A kiln car used in a tunnel-type kiln has a refractory cart top mounted on the top of a metal kiln car body, but such kiln cars have metal surfaces on both sides. Since it is exposed, it has the disadvantage that it is easily burned out by the high temperature gas in the furnace. Conventionally, efforts have been made to prevent kiln car burnout and overheating of the lower part of the kiln car by making the cart top of the kiln car protrude from both sides and forming a recess in the corresponding part of the furnace wall. However, although this structure is common, when operating the furnace with positive pressure or when the burner is installed near the top of the cart,
It was not possible to prevent the upper surfaces of both sides of the kiln car from being burnt out, twisting or bending, or the lower part of the kiln car from overheating. In order to prevent these drawbacks using this method, it is possible to make the cartop thicker than necessary or to double the recesses in the furnace wall, but both of these methods increase costs and worsen the fuel efficiency of the furnace, so they are not recommended. do not have.

In addition, as shown in Japanese Utility Model Application Publication No. 58-27349, there is a method of pasting castable refractories etc. on the sand seal plates provided on both sides of the kiln car in order to prevent the kiln car from burning out.
The castable refractory cracked or fell off as the kiln car moved in and out of the furnace, requiring frequent repairs, which was still not a satisfactory solution.

(Problems to be solved by the invention) The present invention solves the conventional problems as described above, and prevents burnout of the kiln car without being affected by the furnace operating conditions and without causing deterioration of the furnace fuel efficiency. This has been completed to provide a kiln car that can reliably prevent this.

(Means for solving the problem) The above problem was solved by installing a pre-formed hollow refractory for protecting the kiln car on top of the metal pedestals protruding from both sides of the upper part of the metal kiln car body. This problem can be solved by a kiln car characterized in that the upper and lower parts of the hollow part are fixed by metal members of the kiln car body, and the upper end of this hollow refractory is continuous with the lower surface of the cart top.

(Example) Next, the present invention will be explained in detail with reference to the illustrated embodiment. Reference numeral 1 denotes a furnace wall of a kiln, 2 a rail, and 3 a kiln car that runs on this rail 2. The kiln car 3 consists of a metal kiln car main body 4 and a refractory cart top 5 placed on the top surface of the kiln car main body 4. The sides of the cart top 5 are protruded as shown in the figure, and a recess 10 formed in the furnace wall 1
The structure is such that it gets inside and obstructs the flow of high-temperature gas.

In the present invention, the kiln car main body 4 is formed to be slightly narrower than the usual one, and a hollow refractory 7 for protecting the kiln car is provided on a pedestal 6 protruding from both sides of the upper part. There is. This hollow refractory 7 is a preformed refractory, such as an SK37 hollow refractory brick, and the central cavity 8
The upper and lower sides of the kiln car body 4 are supported and fixed by metal members of the kiln car body 4. This cavity 8 is filled with ceramic fibers. In this way, the upper end of the hollow refractory 7 supported on both sides of the upper part of the kiln car body 4 is configured to be in contact with the lower surface of the cart top 5.

Note that 11 is a conventionally known sand seal plate, the lower end of which reaches the inside of the sand seal groove 12.

(Function) The kiln car of the present invention constructed in this way is similar to conventional kiln cars in that the object to be fired is placed on the cart top 5 and passed through the furnace to be fired. The above-mentioned hollow refractory 7 is provided on the pedestal 6 protruding from both sides of the upper part, with its upper end continuous with the lower surface of the cart top 5, so that the metal kiln car main body 4 can be placed inside the furnace. Protected from hot gases and will not burn out or warp due to heat. Especially this hollow refractory 7
The air layer in the internal cavity 8 exhibits an excellent heat insulating effect and can protect the kiln car main body 4 from the high temperature inside the furnace. In addition, this hollow refractory 7 is different from castable refractories or the like that are pasted on site, and there is no risk of it degrading and falling apart during use. Since it is securely fixed, there is no risk of it falling off.

(Effects of the invention) As is clear from the above explanation, the present invention effectively prevents burnout and thermal distortion of the metal kiln car body with a relatively simple structure, and is compatible with the sealing effect of the sand seal plate. In addition, overheating of the lower part of the kiln car can be prevented. Moreover, this effect is not affected by the operating conditions of the reactor, and since it does not require modification of the reactor body, it can be produced at low cost, and there is no risk of the hollow refractory peeling or falling off. It requires almost no maintenance. Furthermore, according to the present invention, there is no need to make the thickness of the cart thicker than necessary, and therefore, the fuel efficiency of the furnace does not deteriorate.

Therefore, the present invention has extremely great practical value as a kiln car that eliminates the problems of the conventional kiln car.

[Brief explanation of the drawing]

The drawings are cross-sectional views illustrating an embodiment of the present invention. 4...Kiln car body, 5...Kartup, 6
... pedestal, 7 ... hollow refractory, 8 ... hollow part.

Claims (1)

[Scope of utility model registration request] A pre-formed hollow refractory 7 for protecting the kiln car is provided on a metal pedestal 6 protruding from both sides of the upper part of the metal kiln car body 4, and the upper and lower parts of the cavity 8 are connected to the kiln car body 4. A kiln car characterized in that the hollow refractory 7 is fixed by a metal member, and the upper end of the hollow refractory 7 is continuous with the lower surface of the cart top 5.