JPH063358Y2 - Non-fired basic brick for rotary kiln - Google Patents

Description

Detailed Description of the Invention a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of unfired basic bricks used for linings of rotary kilns.

b. Conventional technology Conventionally, when lining bricks in a rotary kiln,
An iron plate having a thickness of 1 to 2 mm was sandwiched between the bricks adjacent to each other in the circumferential direction. This iron plate was heated and melted during the operation of the rotary kiln to weld the bricks to each other and to absorb the thermal expansion of the bricks.

As a method of sandwiching the iron plate between the bricks, iron plates cut according to the shape are stacked alternately with the bricks, or as shown in FIG. 2, the iron plate a is previously attached to the side surface of the brick b. There were two methods of stacking them.

c. Problems to be Solved by the Invention However, in the former method, not only a great deal of labor is required for the work, but also the surface of the brick is rough and has unevenness. There is a problem that a large gap is generated between them and the welding strength of the brick is lowered.

Further, the latter method can reduce the labor required for the work as compared with the former method, but does not improve the welding strength. In other words, the adhesive that fixes the iron plate to the bricks volatilizes before the iron plate melts and welds the bricks when the kiln is fired, so the gap between the bricks expands by the thickness of this adhesive layer. , This gap could reach about 30mm around the entire circumference, which was one of the causes of brick falling.

As described above, in any of the methods, there is a problem that the brick is loosened and the brick comes off.

d. Means for Solving the Problems The present invention has been made in view of the above problems, and an object thereof is to improve the welding strength between bricks to prevent the bricks from falling off when the kiln is fired. The purpose of the present invention is to provide a non-fired basic brick for a rotary kiln that can extend the life of the brick. The gist of the brick is iron powder on at least one of the side surfaces adjacent to other bricks in the circumferential direction of the rotary kiln. A non-fired basic brick for a rotary kiln characterized by having a layer.

An embodiment of a non-fired basic brick for a rotary kiln according to the present invention will be described in detail below with reference to FIG.

As shown in FIG. 1, a brick 1 is composed of a brick portion 2 made of unfired basic brick and an iron powder layer 3 provided on one side surface of the brick portion 2.

The iron powder layer 3 is provided on one or both of the side surfaces a and b adjacent to another brick in the circumferential direction when the brick 1 is lined in a rotary kiln. This iron powder layer on both sides a,
If it is provided on one side of b, its thickness is 1 to 2 mm.
If it is provided on both sides, it is preferably 0.5 to 1 mm.

In order to manufacture the brick 1, for example, iron powder is previously sprayed on the bottom surface of the mold, bitter juice (nigari), polyhydric alcohol, etc. are added as a binder, and then the brick 1 is pressed. Next, the raw materials for the non-fired basic brick were put into this form,
Press at a high pressure of 0 to 1,200 kg / cm ² . Alternatively,
You may put the press-molded brick part 2 in a mold and press it. As a result, the iron powder layer 3 is brought into close contact with the brick portion 2, so that a product having excellent dimensional accuracy can be obtained.

To line the rotary kiln with this brick 1,
The procedure may be similar to that of the conventional brick shown in the figure.

e. Effect of the Invention According to the brick of the present invention, the dimensional accuracy of the whole is improved. Therefore, when the brick is lined with this brick, looseness of the brick is reduced,
The welding strength between bricks is greatly improved. As a result, there is no risk that the brick will fall off when the fire enters, and the life of the brick can be extended.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an unfired basic brick for a rotary kiln according to the present invention, and FIG. 2 is a perspective view showing a conventional brick. 1 ... Unfired basic brick for rotary kiln, 2 ... Brick part, 3 ... Iron powder layer.

Claims (1)

[Scope of utility model registration request] 1. A non-fired basic brick for a rotary kiln, wherein an iron powder layer is provided on at least one of the side surfaces adjacent to another brick in the circumferential direction of the rotary kiln.