JPH0289636A - Ceramic liner and manufacture thereof - Google Patents

Abstract

PURPOSE:To enable a liner to be changed easily and constantly through abrasion inspection of it by being formed integrally from ceramics of two layers or more capable of being distinguished respectively through its color or color tone. CONSTITUTION:A ceramic liner is made of, for example, white alumina or zirconia in its first layer in order to form a ceramics layer of two layers or more capable of being distinguished respectively through its color or color tone, and such liner can be constituted integrally in use of one added with pigment capable of being colored as baked to such alumina or zirconia as a second layer. And, as a liner having a different color tone, the liner can be constituted integrally in making a first layer of white silicon nitride, and a second layer of black silicon nitride. Upon constituting it in this fashion, as one ceramics layer abrased, the other ceramics layer under it having different color or color tone comes out, thereby detecting easily the necessity of change of a liner by judging the abrased rate of the liner through this manner.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ceramic liner and a method for manufacturing the same.

BACKGROUND OF THE INVENTION In recent years, various ceramic materials have been developed, and since such ceramics have excellent wear resistance, sintered bodies of ceramics are most commonly used as liners.

In addition to the problems that the invention seeks to solve, even though such ceramics have excellent abrasion resistance, they are not permanent, and when used as a liner, considerable abrasion can be seen depending on the purpose of use. It is necessary to detect the amount of liner wear and decide whether to replace it, but with conventional methods, the amount of wear (loss) of the liner cannot be determined.
Various pressures are observed because the pressure is not uniformly determined by experience.

Therefore, the purpose of the present invention is to solve such problems by providing a system that allows the liner to be replaced easily and regularly by knowing when the permanent amount of the ceramic material liner has reached a certain level. It is an object of the present invention to provide a ceramic liner and a method for manufacturing the same.

Means for Solving the Problems In order to achieve the above-mentioned object, according to the present invention, a ceramic liner is integrally made of two or more layers of ceramic, each of which can be distinguished by color or tone. It is characterized by

Further, according to the present invention, the method for manufacturing a ceramic liner includes forming a first ceramic layer, forming a second ceramic layer having a different color or tone after sintering, and then forming a second ceramic layer having a different color or tone. , characterized in that it consists of integrally fabricating a second layer of ceramics by sintering them together.

Furthermore, according to the present invention, the method for manufacturing a ceramic liner includes integrally forming a layer of a second sintered ceramic body having a different color or tone on the layer of the first sintered ceramic body. It is characterized by consisting of building.

Function: The ceramic liner of the present invention has two or more ceramic layers each distinguishable by color or tone, and on top of the first layer, another second ceramic layer is integrally formed by sintering or bonding. When one ceramic layer wears out, the other ceramic layer with a different color or tone appears underneath, making it clearly distinguishable from the previous ceramic layer, and this allows the wear of the liner to be determined. .

I can do it.

In this invention, first, ordinary granules are lightly pressed, then granules containing a pigment that develops color when sintered are placed on top of the granules and pressed at a predetermined molding pressure to form a multi-layered molded body. obtain.

Next, the molded bodies integrally laminated in this manner are degreased and sintered. The ceramic sintered body liner made integrally in this way is made by molding a layer of ceramic sintered body of a different color on top of a layer of colored ceramic sintered body. Therefore, when one layer of the liner is worn out, the wear of the liner can be easily detected by the appearance of another layer of colored liner underneath, which can therefore be used to determine the wear of the liner. .

Ceramic materials constituting such liners include alumina, zirconia, silicon nitride, and the like, which are inexpensive and have excellent wear resistance.

In the ceramic liner of the present invention, in order to form two or more ceramic layers that can be distinguished from each other by color or tone, for example, the first layer is made of white alumina or zirconia, and the second layer is made of white alumina or zirconia. The liner can be integrally constructed by using such alumina or zirconia as a layer to which a pigment that develops color when sintered is used.Also, as a layer with a different color tone, a liner can be made of white silicon nitride. The liner can be integrally constructed by forming one layer and a second layer of black silicon nitride.

Of course, it is naturally possible to reverse the materials of the first and second liner layers, or to use combinations of various materials and pigments.

Also, each layer of such a liner can be made by sintering separately, so that the first layer of liner has a second layer of separate liner f! :
It can also be made by bonding using an appropriate adhesive.

Example Ordinary white alumina granules were made into O-
2”/cz2 pressure and 125X250X25
zz dimensions, granules of white alumina with a red pigment added thereto were added to a thickness of 3cm, and the mixture was again pressure-molded at a pressure of 1 ton/C.2.

Ta. When this was sintered at a temperature of 1600° C. for 3 hours, a layered liner was obtained which was white with some parts colored red.

In particular, conventional ceramic liners are used for the lining of the chutes in the high-pressure powder transport pipes, but the amount of wear is unknown, and based on experience, they are automatically replaced after 24 months of use. Occasionally, when a large amount or particularly hard material flows, a part of the liner wears out and breaks through the surrounding iron pipes, which frequently occurs. In this case, there are 2~
Due to the pressure of 3 kg/cm2 being applied, if a part of the iron pipe were to break, powder would blow out, posing a serious danger to workers working nearby.

Therefore, when the ceramic liner of the present invention manufactured as described above is used as the lining for the shoe section I in a high-pressure powder transport pipe, the wear amount of the chute section can be grasped at a glance by looking inside the pipe. This makes it possible to accurately detect variations in the quality of the liner and changes in the amount of wear in places where wear is severe, such as curved parts and corners.

In addition, the ceramic liner of this invention is
Separator linings, cyclone linings, duct linings, vibrator linings used for transporting items containing harmful ingredients,
Can be effectively used for ball mill liners, lining pipes, etc.

In this way, according to the ceramic liner of this invention,
A second layer of another ceramic sintered body is laminated on a first layer of two or more ceramic sintered bodies that can be distinguished from each other by at least color or tone, or are partially colored. When one layer wears out, another layer of a different color or tone is revealed beneath it, allowing you to determine how much the liner is worn and when it needs to be replaced. It can be easily understood at a glance, and accidents caused by liner failure can be prevented.

In addition, the liner of the ceramic sintered body can be colored in its entirety or in part, or it can be colored partially as a pattern. Various combinations of materials can be used.

Same as above, patent attorney So Gado Teriko, j

Claims (3)

[Claims] (1) A ceramic liner characterized in that it is integrally made of two or more layers of ceramic that can be distinguished by color or tone. (2) On the first ceramic layer, a second ceramic layer with a different color or tone is formed after sintering, and then the first and second ceramic layers are sintered together. A method of manufacturing a ceramic liner comprising integrally manufacturing it. (3) A method for producing a ceramic liner, which comprises integrally forming a layer of a second ceramic sintered body having a different color or tone on a first ceramic sintered body layer.