CN214199698U

CN214199698U - Metal-based ceramic composite hanging sheet for inner cylinder of preheater in cement plant

Info

Publication number: CN214199698U
Application number: CN202023145402.0U
Authority: CN
Inventors: 张红阳; 董正洪; 张珂; 刘旭; 范道荣; 单丹; 张帆
Original assignee: TIANJIN SINOMA ENGINEERING RESEARCH CENTER CO LTD; Tianjin Cement Industry Design and Research Institute Co Ltd
Current assignee: TIANJIN SINOMA ENGINEERING RESEARCH CENTER CO LTD; Tianjin Cement Industry Design and Research Institute Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-09-14
Anticipated expiration: 2030-12-23

Abstract

The utility model relates to a compound lacing film of cement plant pre-heater inner tube metal matrix pottery forms by heat-resisting steel lacing film base member and ceramic layer two parts are compound, the lacing film base member is I shape lacing film, both sides are equipped with four gomphosis steps about the lacing film base member, the ceramic layer includes anticorrosive wear-resisting ceramic layer and the compound ceramic layer of stress heterojunction that disappears, lacing film base member surface coating anticorrosive wear-resisting ceramic layer, anticorrosive wear-resisting ceramic layer's thickness is 100 ~ 200 mu m, four gomphosis step surface coatings stress heterojunction that disappears compound ceramic layer, stress heterojunction that disappears compound ceramic layer thickness is 100 ~ 200 mu m. The utility model discloses a metal matrix ceramic composite hanger can satisfy the stress demand of the different positions of hanger, and wear-resisting, high temperature resistant, corrosion resisting property are good, and long service life practices thrift the cost, and safety ring protects, and the construction is simple, the preparation of being convenient for.

Description

Metal-based ceramic composite hanging sheet for inner cylinder of preheater in cement plant

Technical Field

The utility model belongs to the technical field of cement clinker predecomposition's preheater whirlwind section of thick bamboo equipment, especially relate to a cement plant preheater inner tube metal base ceramic composite hanging piece.

Background

The cyclone preheater for cement kiln is a raw material preheating device in cement production line, at present, the I-shaped hanging piece with the inner cylinder in the form of multi-purpose partition hanging is provided, the service life of the common heat-resistant steel hanging piece is about 8 months in high-chlorine environment, therefore, some cement factories can use heat-resistant and wear-resistant special alloy steel materials, but the special alloy steel is expensive, and the inner cylinder of the preheater in the cement factory is surrounded by high-temperature environment, especially the temperature of the cyclone cylinder of the preheater with a decomposing furnace is up to about 1050 ℃, and the corrosion of gas is strong, the service life of the special alloy steel hanging piece is generally not more than one year, the special alloy steel hanging piece still needs to be frequently replaced, and the production cost is extremely high.

Meanwhile, four embedded steps of the I-shaped hanging piece are seriously corroded by stress, and the stress corrosion fracture speed is about 10^-8～10^-6In the order of m/s, is much greater than the corrosion rate in the absence of stress. And the corrosion speed is accelerated along with the increase of the stress. Especially, the hanging pieces above the preheater inner cylinder in a cement plant have large tensile stress and serious stress corrosion. To achieve the purpose, it is necessary to develop a high temperature resistant and corrosion resistant metal hanging piece, and different corrosion resistant coatings are used for different positions of the hanging pieceTo achieve a better effect.

Disclosure of Invention

The utility model provides a solve the problem that exists among the prior art, provide a cement plant preheater inner tube metal base ceramic composite lacing film wear-resisting high temperature resistant, anticorrosive, long service life.

The utility model discloses a realize like this, a compound lacing film of cement plant pre-heater inner tube metal base pottery, by heat-resistant steel lacing film base member and the complex formation of ceramic layer two parts, the lacing film base member is I shape lacing film, and both sides are equipped with four gomphosis steps about the lacing film base member, the ceramic layer includes anticorrosive wear-resisting ceramic layer and the compound ceramic layer of stress heterojunction that disappears, lacing film base member surface coating anticorrosive wear-resisting ceramic layer, four gomphosis step surface coating stress heterojunction that disappears compound ceramic layer of stress heterojunction.

In the above technical scheme, preferably, the thickness of the anticorrosive wear-resistant ceramic layer is 100-200 μm.

In the above technical scheme, preferably, the thickness of the stress relief heterojunction composite ceramic layer is 100-200 μm.

The utility model has the advantages and positive effects that:

1. the utility model discloses a lacing film is wear-resisting, high temperature resistant, corrosion resisting property is good. Different coatings are coated on different positions of the hanging piece, so that the stress requirements of the hanging piece at different positions are met, the metal-based ceramic composite coating and the heat-resistant steel hanging piece matrix form firm chemical bonds through chemical reaction at high temperature, a compact coating structure is formed, the wear resistance, the high temperature resistance and the corrosion resistance of the hanging piece are improved, and the hardness is high.

2. The utility model discloses a lacing film long service life practices thrift the cost. Compared with the hanger sheet which only uses alloy steel, the metal-based ceramic composite hanger sheet reduces the repair cost of corrosion resistance and the cost of manpower and material resources for replacing the hanger sheet.

3. The utility model discloses a lacing film safety ring protects. The metal-based ceramic composite coating is a pure inorganic system, can work for a long time at 800-1200 ℃, can not burn in case of fire, and is colorless, tasteless and nontoxic.

4. The coating of the anti-corrosion wear-resistant ceramic layer and the stress-relief heterojunction composite ceramic layer of the utility model can be coated or brushed on the hanging piece in a coating mode, and the construction is simple and the manufacture is convenient.

Drawings

Fig. 1 is a front view of a metal-based ceramic composite hanger according to an embodiment of the present invention;

fig. 2 is a side view of a metal matrix ceramic composite hanger according to an embodiment of the present invention.

In the figure: 1. a hanging piece base body; 2. embedding steps; 3. an anti-corrosion wear-resistant ceramic layer; 4. the stress-relief heterojunction composite ceramic layer.

Detailed Description

For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:

in the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "fixed" are used in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium; there may be communication between the interiors of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 and 2, an embodiment of the present invention provides a metal-based ceramic composite hanging sheet for a preheater inner cylinder in a cement plant, which is formed by combining a heat-resistant steel hanging sheet base body and a ceramic layer, wherein the hanging sheet base body is an i-shaped hanging sheet, four embedding steps are arranged on the upper side and the lower side of the hanging sheet base body, the ceramic layer includes an anti-corrosion and wear-resistant ceramic layer and a stress-relief heterojunction composite ceramic layer, the outer surface of the hanging sheet base body is coated with the anti-corrosion and wear-resistant ceramic layer, and the outer surface of the four embedding steps is coated with the stress-.

Preferably, the thickness of the anticorrosive wear-resistant ceramic layer is 100-200 μm.

Preferably, the thickness of the stress-relief heterojunction composite ceramic layer is 100-200 mu m.

The utility model discloses a preparation step as follows:

1. the surface of the heat-resistant steel hanging piece is subjected to sand blasting treatment before coating, and the surface is subjected to sand blasting until Sa2.5.

2. Uniformly coating the outer surface of the hanging piece substrate with anticorrosive and wear-resistant precursor slurry, wherein the thickness of the anticorrosive and wear-resistant precursor slurry coated on the outer surface of the hanging piece substrate is 100-200 mu m; the anti-corrosion wear-resistant precursor slurry consists of an inorganic silicon nano ceramic binder and nano ceramic powder, wherein the nano ceramic powder consists of Al₂O₃、Si₃N₄、BaTiO₃And the like; the anti-corrosion wear-resistant precursor slurry can be sprayed or brushed on the heat-resistant steel lacing film base body at room temperature.

Uniformly coating stress-relief heterojunction composite ceramic paint on the four embedded steps, wherein the thickness of the stress-relief heterojunction composite ceramic paint coated on the surfaces of the four embedded steps is 100-200 mu m; the stress-relief heterojunction composite ceramic coating consists of an inorganic silicon nano ceramic binder, nano ceramic powder, toughened zirconia and graphene, wherein the nano ceramic powder is Al₂O₃、Si₃N₄、BaTiO₃And the stress-relief heterojunction composite ceramic coating can be sprayed or brushed on the four embedded steps at room temperature.

3. Coating the surface of a hanging piece substrate with an anticorrosive wear-resistant precursor slurry, coating stress-relief heterojunction composite ceramic coating on the surfaces of four embedded steps, putting the hanging piece substrate into a heating furnace after the surface of a coating is dried, heating the coating to 900-1100 ℃ from room temperature at the heating rate of 1-5 ℃/min in the air atmosphere, preserving heat and curing for 2-3 h, chemically reacting the coating at different positions of the hanging piece with a heat-resistant steel hanging piece to form firm chemical bonds, respectively forming an anticorrosive wear-resistant ceramic layer and a stress-relief heterojunction composite ceramic layer after high-temperature curing, and naturally cooling to obtain the metal-based ceramic composite hanging piece.

4. The solidified metal-based ceramic composite hanging piece can be directly assembled in a preheater for use. The metal-based ceramic composite hanging piece has good corrosion resistance and wear resistance.

The utility model discloses a metal matrix ceramic composite hanger piece is wear-resisting, high temperature resistant, corrosion resisting property is good, and long service life practices thrift the cost, and safety ring protects, and the construction is simple, the preparation of being convenient for.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a compound lacing film of cement plant pre-heater inner tube metal base pottery which characterized in that is formed by heat-resisting steel lacing film base member and ceramic layer two parts complex, the lacing film base member is I shape lacing film, and both sides are equipped with four gomphosis steps about the lacing film base member, the ceramic layer includes anticorrosive wear-resisting ceramic layer and the compound ceramic layer of stress heterojunction that disappears, lacing film base member surface coating anticorrosive wear-resisting ceramic layer, four gomphosis step surface coating stress heterojunction that disappears compound ceramic layer.

2. The metal-based ceramic composite hanging piece for the inner cylinder of the preheater in the cement plant as recited in claim 1, wherein the thickness of the anti-corrosion wear-resistant ceramic layer is 100-200 μm.

3. The cement plant preheater inner cylinder metal base ceramic composite hanger plate as claimed in claim 1, wherein the stress relief heterojunction composite ceramic layer has a thickness of 100-200 μm.