CN211678168U - Low-cost and repairable ceramic alloy composite lining plate - Google Patents
Low-cost and repairable ceramic alloy composite lining plate Download PDFInfo
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- CN211678168U CN211678168U CN202020013714.7U CN202020013714U CN211678168U CN 211678168 U CN211678168 U CN 211678168U CN 202020013714 U CN202020013714 U CN 202020013714U CN 211678168 U CN211678168 U CN 211678168U
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Abstract
The utility model discloses a low-cost and repairable ceramic alloy composite lining plate, which comprises a ceramic prefabricated part, a ceramic alloy wear-resistant part, a lining plate base, a clamping groove, a lining plate end face flange, a groove and a boss, wherein the ceramic prefabricated part is fixed on the surface of a casting mold cavity of the ceramic alloy wear-resistant part, and a ceramic alloy wear-resistant part with the surface combined by the ceramic prefabricated part and a wear-resistant alloy material is obtained by pouring wear-resistant alloy metal liquid; the lining plate base is formed by casting a parent metal material, the ceramic alloy wear-resistant part is fixed on the lining plate base through the clamping groove, the lining plate base and the upper end face of the ceramic alloy wear-resistant part are compressed and fixed through bolts for lining plate end face flanges, low-melting-point metal liquid is poured into a gap between the ceramic alloy wear-resistant part and the lining plate base, a groove is formed in the inner side arc surface of the lining plate base, and a plurality of bosses are arranged on the surface of the groove. The ceramic prefabricated part in the composite lining plate is in a honeycomb or grid shape, and the different wear-resistant materials on the surface form a height difference when the composite lining plate is worn during operation, so that the grinding efficiency of the pulverized coal is improved.
Description
Technical Field
The utility model relates to a low-cost, can repair the compound welt of cermet, applicable in various welts of trades such as thermal power, cement, metallurgy, mine.
Background
In the industries of thermal power generation, cement, metallurgy, mine and the like, the millstone lining plate is widely applied to a pulverizing system. As a main wear-resistant part, the wear resistance of the lining plate directly influences the working efficiency, powder quality, material consumption and production cost of powder making. Because the working condition of milling is abominable, the lining board can all appear comparatively serious wearing and tearing in use. When the abrasion is serious, pits and grooves appear, the grinding efficiency of the coal mill is reduced, and the output of the coal mill is insufficient. Most of the millstone lining plates used in the existing thermal power plants are integrally cast by high-chromium cast iron, so that the cost is high and the machinability is poor. The wear-resistant alloy material is repeatedly overlaid on the lining plate after abrasion occurs in operation, so that the service life of the grinding roller can be prolonged, but the overlaying layer is easy to fall off in the grinding process when the coal quality is poor, and the high-chromium cast iron is poor in weldability and can be overlaid for 3 times. The composite lining plate is prepared by overlaying the wear-resistant layer on the low-carbon steel substrate, the overlaying frequency can be improved to about 5 times, but stress concentration can be generated in the overlaying process, the service life is shortened, the machine halt maintenance is required to be frequently carried out, and the maintenance cost is increased. The ceramic composite lining plate is prepared by embedding the ceramic rod with the high-chromium cast iron material, can play a certain wear-resisting role in the initial wear stage, but is easy to break when being extruded and sheared due to the fact that the metal material is preferentially ground out and the ceramic rod is isolated and protruded on the surface of the lining plate in the later wear stage, and cannot play a wear-resisting effect. The ceramic particle composite reinforced lining plate produced by Magotteaux company in Belgium can play a good wear-resisting effect, but is integrally cast and molded, cannot be repaired by overlaying welding after being worn, and has high use cost.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at solving the defects in the prior art and providing a low-cost repairable ceramic alloy composite lining plate.
The technical scheme is as follows: the utility model discloses a low-cost, repairable combined ceramic alloy lining board, including ceramic prefab, ceramic alloy wearing parts, lining board base, draw-in groove, lining board end face flange, recess and boss, ceramic alloy wearing parts be formed by ceramic prefab and wearing alloy material combination, ceramic prefab fixes on ceramic alloy wearing parts casting mould cavity surface, obtains the ceramic alloy wearing parts that the surface is combined by ceramic prefab and wearing alloy material through pouring wear-resisting alloy molten metal; the ceramic alloy wear-resistant part is fixed on the lining plate base through the clamping groove, the lining plate base and the upper end face of the ceramic alloy wear-resistant part are pressed and fixed through bolts for lining plate end face flanges, low-melting-point metal liquid is poured into a gap between the ceramic alloy wear-resistant part and the lining plate base, a groove is formed in the inner side arc surface of the lining plate base, and a plurality of bosses are arranged on the surface of the groove.
Further, the surface of the ceramic prefabricated part is in a honeycomb shape or a grid shape.
Further, the thickness of the ceramic prefabricated member is 10-60 mm.
Further, the bottom surface of the ceramic prefabricated member is a plane or a curved surface.
Further, the clamping groove is arc-shaped or inverted-angle-shaped, and the angle is smaller than 90 degrees.
Furthermore, the lining plate base and the upper end face of the ceramic alloy wear-resistant part are on the same plane.
Further, the depth of the groove is 5-10 mm.
Furthermore, the bosses are cylindrical and are arranged in a staggered mode.
Further, the height of the boss is the same as the depth of the groove.
Further, the wear-resistant alloy material is high-chromium cast iron or high-manganese steel.
Has the advantages that: the utility model has the advantages as follows:
(1) the base of the lining plate is made of common nodular cast iron or medium and low carbon steel, so that the material cost is low and the lining plate is easy to process;
(2) the inner arc surface of the liner plate base is provided with a cylindrical boss, and when the bottom surface of the ceramic alloy wear-resistant part is integrally matched with the boss to form a gap, the gap can be eliminated through the polishing boss, so that the polishing workload is greatly reduced;
(3) in the later stage of liner plate abrasion, the flange on the end face of the liner plate can be disassembled on site, the ceramic alloy abrasion-resistant part with serious abrasion is disassembled and replaced by a new ceramic alloy abrasion-resistant part, the problem that the metal ceramic composite liner plate cannot be repaired is solved, and the purchasing cost of a user is reduced;
(4) the ceramic alloy wear-resistant part and the lining plate base are convenient to assemble, and the gap is filled by pouring molten metal, so that the wear-resistant part and the lining plate base are tightly attached;
(5) the ceramic alloy layer on the surface of the lining plate is formed by compounding a ceramic prefabricated part with high wear resistance and a wear-resistant alloy, and has double wear resistance;
(6) the ceramic prefabricated part is in a honeycomb or grid shape, and different wear-resistant materials on the surface form a height difference when the ceramic prefabricated part is worn during operation, so that the grinding efficiency of the coal powder is improved.
Drawings
FIG. 1 is a sectional view of the composite lining board of the present invention;
FIG. 2 is a schematic perspective view of the composite lining board of the present invention;
FIG. 3 is a schematic structural view of the ceramic preform of the present invention;
FIG. 4 is a cross-sectional view of the structure of FIG. 3;
FIG. 5 is a schematic structural view of the wear-resistant ceramal element of the present invention;
FIG. 6 is a cross-sectional view of the structure of FIG. 5;
FIG. 7 is a schematic structural view of the liner plate base of the present invention;
fig. 8 is a sectional view of the structure of fig. 7.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the following specific embodiments.
As shown in fig. 1 to 8, the low-cost repairable ceramic alloy composite lining plate comprises a ceramic prefabricated part 1, a ceramic alloy wear-resistant part 2, a lining plate base 3, a clamping groove 4, a lining plate end face flange 5, a groove 6 and a boss 7, wherein the ceramic alloy wear-resistant part 2 is formed by combining the ceramic prefabricated part 1 and a wear-resistant alloy material, the wear-resistant alloy material is high-chromium cast iron or high-manganese steel, the ceramic prefabricated part 1 is fixed on the surface of a casting mold cavity of the ceramic alloy wear-resistant part, and then wear-resistant alloy molten metal is poured to obtain the ceramic alloy wear-resistant part 2 with the surface metallurgically combined by the ceramic prefabricated part and the wear-resistant alloy.
The surface of the ceramic prefabricated member 1 is in a honeycomb shape or a grid shape, the thickness of the ceramic prefabricated member is 10-60mm, and the bottom surface of the ceramic prefabricated member is a plane or a curved surface.
The lining plate base 3 is formed by casting a parent metal material, wherein the parent metal material is one of nodular cast iron, low-carbon steel or medium-carbon steel, firstly the parent metal material forms molten metal, and then the molten metal is poured into a casting mold cavity to obtain the lining plate base 3.
During assembly, the ceramic alloy wear-resistant part 2 with the heat treatment wear-resistant alloy hardness reaching 60-64HRC is fixed on the lining plate base 3 through the clamping groove 4, the clamping groove 4 is in an arc shape or a chamfer shape, and the angle is smaller than 90 degrees. The upper end faces of the lining plate base and the ceramic alloy wear-resistant part are on the same plane, the lining plate end face flange 5, the lining plate base 3 and the ceramic alloy wear-resistant part 2 are pressed and fixed by bolts on the upper end faces, aluminum or aluminum alloy molten metal is poured to fill the gap between the ceramic alloy wear-resistant part 2 and the lining plate base 3, and the gap between the ceramic alloy wear-resistant part 2 and the lining plate base 3 is polished after cooling.
The composite lining plate comprises a lining plate base which is formed by casting a parent metal material, wherein the small end face of the lining plate base is in a clamping groove structural design, a groove 6 is formed in the arc surface of the lining plate base, the depth of the groove 6 is 5-10mm, cylindrical bosses 7 are arranged on the surface of the groove, the cylindrical bosses 7 are arranged in a staggered mode, and the height of each boss 7 is the same as the depth of the groove 6. The cylindrical boss of welt base intrados design, when the ceramic alloy wearing parts bottom surface was gapped with boss global cooperation, clearance was eliminated to the accessible boss of polishing, polishing work load significantly reduced.
The ceramic alloy wear-resistant part and the upper end face of the lining plate base are fixed through the lining plate end face flange, the end face flange is provided with bolt holes, the bolt holes are internally provided with bolts connected with the upper end face of the lining plate, the ceramic alloy wear-resistant part is formed by compositely pouring a wear-resistant alloy material and a ceramic prefabricated part, and the ceramic prefabricated part is formed by mixing ceramic particles, a binder and ceramic powder at normal pressure.
The preparation method of the low-cost and repairable ceramic alloy composite lining plate comprises the following steps:
(1) pretreating ceramic particles with the particle size of 8-30 meshes;
(2) uniformly mixing the pretreated ceramic particles and a binder according to a certain proportion to obtain a mixture, wherein the addition amount of the binder is 1-6% of the mass of the ceramic particles;
(3) adding a certain proportion of ceramic powder into the mixture obtained in the step (2) and uniformly mixing to obtain a particle mixture, wherein the particle size of the ceramic powder is 200-500 meshes, and the adding amount is 1-8% of the mass of the mixture;
(4) uniformly loading the particle mixture obtained in the step (3) into a foamed ceramic boat, compacting, then placing into a drying oven for drying at 50-200 ℃ for 24-72 hours, and demoulding after drying to obtain a ceramic prefabricated member;
(5) fixing the ceramic prefabricated part in the step (4) on the surface of a casting cavity of the ceramic alloy wear-resistant part, and then pouring wear-resistant alloy metal liquid to obtain the ceramic alloy wear-resistant part with the surface metallurgically combined by the ceramic prefabricated part and the wear-resistant alloy material;
(6) carrying out heat treatment on the ceramic alloy wear-resistant part in the step (5) to enable the hardness of the wear-resistant alloy to reach 60-64HRC, and machining the heat-treated ceramic alloy wear-resistant part;
(7) smelting a parent metal material to form parent metal liquid, and then pouring the parent metal liquid into a casting mold cavity to obtain a lining plate base;
(8) fixing the ceramic alloy wear-resistant part after heat treatment on a lining plate base through a clamping groove, tightly pressing and fixing a lining plate end face flange, the lining plate base and the ceramic alloy wear-resistant part through bolts, pouring metal liquid to fill a gap between the ceramic alloy wear-resistant part and the lining plate base, and polishing the gap between the prefabricated part and the lining plate base after cooling to manufacture the low-cost and repairable ceramic alloy composite lining plate.
Wherein, the ceramic particle pretreatment is to coat the surface of the ceramic particle with iron-based, nickel-based or cobalt-based low-melting-point alloy materials.
Wherein, the ceramic particles are one or the combination of any more of alumina, zirconia, silicon carbide, titanium carbide, tungsten carbide and titanium nitride.
Wherein, the binder is one or the combination of any more of silica sol, water glass, aluminum sol, sodium carbonate, polyvinyl alcohol and phenolic resin.
Wherein, the ceramic powder is one or the combination of any several of boron carbide, silicon carbide and yttrium oxide.
Wherein, the wear-resistant alloy material in the step (5) is high-chromium cast iron or high-manganese steel.
Wherein, the parent metal material in the step (7) is one of nodular cast iron, low-carbon steel or medium-carbon steel.
Wherein the molten metal in the step (8) is aluminum or aluminum alloy.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (10)
1. A low-cost, repairable compound welt of ceramal, characterized by that: the ceramic alloy wear-resistant part comprises a ceramic prefabricated part (1), a ceramic alloy wear-resistant part (2), a lining plate base (3), a clamping groove (4), a lining plate end face flange (5), a groove (6) and a boss (7), wherein the ceramic alloy wear-resistant part (2) is formed by combining the ceramic prefabricated part (1) and a wear-resistant alloy material, the ceramic prefabricated part (1) is fixed on the surface of a casting mold cavity of the ceramic alloy wear-resistant part, and the ceramic alloy wear-resistant part (2) with the surface formed by combining the ceramic prefabricated part (1) and the wear-resistant alloy material is obtained by pouring wear-resistant alloy; welt base (3) form by the casting of parent metal material, the wearing part of ceramal (2) are fixed on welt base (3) through draw-in groove (4), welt base (3) and the up end of wearing part of ceramal (2) are fixed with bolt-up through welt end face flange (5), the clearance pouring low melting point metal liquid between wearing part of ceramal (2) and welt base (3), be equipped with recess (6) on the inboard arc surface of welt base (3), recess (6) surface is equipped with a plurality of bosss (7).
2. The low-cost, repairable ceramic alloy composite liner plate of claim 1, wherein: the surface of the ceramic prefabricated part (1) is in a honeycomb shape or a grid shape.
3. A low cost, repairable ceramic alloy composite liner plate as claimed in claim 1 or 2, wherein: the thickness of the ceramic prefabricated part (1) is 10-60 mm.
4. A low cost, repairable ceramic alloy composite liner plate as claimed in claim 1 or 2, wherein: the bottom surface of the ceramic prefabricated part (1) is a plane or a curved surface.
5. The low-cost, repairable ceramic alloy composite liner plate of claim 1, wherein: the clamping groove (4) is arc-shaped or inverted-angle-shaped, and the angle is smaller than 90 degrees.
6. The low-cost, repairable ceramic alloy composite liner plate of claim 1, wherein: the lining plate base (3) and the upper end face of the ceramic alloy wear-resistant part (2) are on the same plane.
7. The low-cost, repairable ceramic alloy composite liner plate of claim 1, wherein: the depth of the groove (6) is 5-10 mm.
8. The low-cost, repairable ceramic alloy composite liner plate of claim 1, wherein: the bosses (7) are cylindrical and are arranged in a staggered mode.
9. A low cost, repairable ceramic alloy composite liner plate as claimed in claim 1 or 8, wherein: the height of the boss (7) is the same as the depth of the groove (6).
10. The low-cost, repairable ceramic alloy composite liner plate of claim 1, wherein: the wear-resistant alloy material is high-chromium cast iron or high-manganese steel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020013714.7U CN211678168U (en) | 2020-01-06 | 2020-01-06 | Low-cost and repairable ceramic alloy composite lining plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020013714.7U CN211678168U (en) | 2020-01-06 | 2020-01-06 | Low-cost and repairable ceramic alloy composite lining plate |
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| CN211678168U true CN211678168U (en) | 2020-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718175A (en) * | 2021-09-02 | 2021-11-30 | 常熟市电力耐磨合金铸造有限公司 | Metal ceramic inlaid composite roller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718175A (en) * | 2021-09-02 | 2021-11-30 | 常熟市电力耐磨合金铸造有限公司 | Metal ceramic inlaid composite roller |
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