CN112694339A - High-strength wear-resistant castable - Google Patents

High-strength wear-resistant castable Download PDF

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Publication number
CN112694339A
CN112694339A CN202110141783.5A CN202110141783A CN112694339A CN 112694339 A CN112694339 A CN 112694339A CN 202110141783 A CN202110141783 A CN 202110141783A CN 112694339 A CN112694339 A CN 112694339A
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parts
micropowder
strength wear
resistant castable
powder
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许小亮
马庆娟
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Sevens New Materials Wuxi Co ltd
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Sevens New Materials Wuxi Co ltd
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Abstract

The invention relates to the technical field of casting materials, in particular to a high-strength wear-resistant casting material, which overcomes the defect that the strength of the casting material is reduced in the environments of metallurgy, power generation, fluidized beds, building materials and waste incineration by the existing casting material, and comprises the following raw material components and additional components: the raw material components are respectively as follows by mass: 50-60 parts of chrome corundum, 7-10 parts of silicon carbide, 5-8 parts of calcium hexaluminate, 1-3 parts of Yongji clay, 3-5 parts of active magnesium oxide, 8-12 parts of silicon nitride powder, 3-6 parts of zircon sand, 3-6 parts of zinc zirconium silicate powder, 3-6 parts of andalusite micropowder, 1 part of gahnite micropowder, 3-6 parts of zinc oxide micropowder and 3-6 parts of flint clay.

Description

High-strength wear-resistant castable
Technical Field
The invention relates to the technical field of casting materials, in particular to a high-strength wear-resistant casting material.
Background
The castable is mainly prepared by taking high-alumina cement, bauxite or corundum as main raw materials and adding materials such as active magnesium oxide, a dispersing agent, silicon carbide, zircon sand, alumina, flint clay and the like, the strength of the castable is reduced in use environments such as metallurgy, power generation, fluidized beds, building materials, waste incineration and the like, most of the castable is caused by chemical reaction, the reason for the chemical reaction is improper storage or various reasons such as different air holes and the like, and the reliability and the service life of the castable can be improved only by improving the strength of the castable, so that a high-strength wear-resistant castable is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the defect that the strength of the castable in the environments of metallurgy, power generation, fluidized beds, building materials and waste incineration is reduced, and provides a high-strength wear-resistant castable.
A high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 50-60 parts of chrome corundum, 7-10 parts of silicon carbide, 5-8 parts of calcium hexaluminate, 1-3 parts of Yongji clay, 3-5 parts of active magnesium oxide, 8-12 parts of silicon nitride powder, 3-6 parts of zircon sand, 3-6 parts of zinc zirconium silicate powder, 3-6 parts of andalusite micropowder, 1 part of gahnite micropowder, 3-6 parts of zinc oxide micropowder and 3-6 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 5 parts of composite superfine powder, 2 parts of an expanding agent, 1 part of a cement additive and 0.1 part of nano-cellulose.
Preferably, the composite superfine powder is a mixture of active silicon dioxide, alpha-alumina and chromium oxide with the grain diameter of 2-4 UM.
Preferably, the swelling agent is an aluminate.
Preferably, the cement additive is an OPTEVA HE and TAVERO VM at a density of 1 gram per cubic centimeter and 1.35 grams per cubic centimeter, respectively.
Preferably, the Yongji clay is 300 meshes, the zinc zirconium silicate powder is 500 meshes, the andalusite micro powder is 600 meshes, the hercynite micro powder is 600 meshes, and the zinc oxide micro powder is 300 meshes.
The preparation method of the high-strength wear-resistant castable is characterized by comprising the following steps:
s1, weighing the raw materials according to the weight, adding water, and mixing by a forced mixer.
S2, weighing the composite superfine powder according to the amount, adding the expanding agent, mixing, and putting into S1 for slow heating expansion.
And S3, adding the cement additive and the nano cellulose, and continuously performing ball milling and mixing to be viscous to prepare the casting material.
S4, forming the mixed castable in a specific mould, drying and demoulding the sample at 135 ℃ for 24 hours, carrying out heat treatment at a lower temperature of about 1500 ℃ for 3 hours, and naturally cooling to obtain the high-strength wear-resistant castable.
Preferably, the amount of water added in the S1 is forced to be ensured to be about 5-6%.
Preferably, the ball milling mixing conditions in S3 are as follows: adding zirconia ball grinding beads according to the ball material mass ratio of 10:1, and carrying out ball-milling and mixing under the conditions of revolution rotating speed of 200-300 r/min and rotation rotating speed of 400-600 r/min.
The invention has the beneficial effects that:
1. the composite superfine powder and the expanding agent are added in the invention, so that the raw materials are subjected to chemical reaction and expand in the process of slow temperature rise, and the strength reduction caused by the shrinkage of the casting material is assisted to a certain extent.
2. The composite superfine powder is added into the refractory castable, and when the heating temperature of the refractory castable reaches about 1500 ℃, the strength, wear resistance and slag resistance of the castable are improved to a certain extent.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
A high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 50-60 parts of chrome corundum, 7-10 parts of silicon carbide, 5-8 parts of calcium hexaluminate, 1-3 parts of Yongji clay, 3-5 parts of active magnesium oxide, 8-12 parts of silicon nitride powder, 3-6 parts of zircon sand, 3-6 parts of zinc zirconium silicate powder, 3-6 parts of andalusite micropowder, 1 part of gahnite micropowder, 3-6 parts of zinc oxide micropowder and 3-6 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 5 parts of composite superfine powder, 2 parts of an expanding agent, 1 part of a cement additive and 0.1 part of nano-cellulose.
Wherein the composite superfine powder is a mixture of active silicon dioxide, alpha-alumina and chromium oxide with the grain diameter of 2-4UM, the expanding agent is aluminate, the cement additive is an OPTEVA (alpha-alumina-chromic oxide) HE and TAVERO (alpha-chromic oxide) polypeptide VM, the density of the composite superfine powder is respectively 1 g per cubic centimeter and 1.35 g per cubic centimeter, the Yongji clay is 300 meshes, the zinc zirconium silicate powder is 500 meshes, the andalusite micropowder is 600 meshes, the iron-zinc spinel micropowder is 600 meshes, and the zinc oxide micropowder is 300 meshes.
The preparation method of the high-strength wear-resistant castable is characterized by comprising the following steps:
s1, weighing the raw materials according to the weight, adding water, and mixing by a forced mixer.
S2, weighing the composite superfine powder according to the amount, adding the expanding agent, mixing, and putting into S1 for slow heating expansion.
And S3, adding the cement additive and the nano cellulose, and continuously performing ball milling and mixing to be viscous to prepare the casting material.
S4, forming the mixed castable in a specific mould, drying and demoulding the sample at 135 ℃ for 24 hours, carrying out heat treatment at a lower temperature of about 1500 ℃ for 3 hours, and naturally cooling to obtain the high-strength wear-resistant castable.
Wherein, the water adding amount in S1 is forced to ensure that the amount is about 5-6%, and the ball milling mixing conditions in S3 are as follows: adding zirconia ball grinding beads according to the ball material mass ratio of 10:1, and carrying out ball-milling and mixing under the conditions of revolution rotating speed of 200-300 r/min and rotation rotating speed of 400-600 r/min.
Example (b):
the first embodiment is as follows:
a high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 50 parts of chrome corundum, 7 parts of silicon carbide, 5 parts of calcium hexaluminate, 1 part of Yongji clay, 3 parts of active magnesium oxide, 8 parts of silicon nitride powder, 3 parts of zircon sand, 3 parts of zinc zirconium silicate powder, 3 parts of andalusite micropowder, 1 part of hercynite micropowder, 3 parts of zinc oxide micropowder and 3 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 5 parts of composite superfine powder, 2 parts of an expanding agent, 1 part of a cement additive and 0.1 part of nano-cellulose.
Example two:
a high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 55 parts of chrome corundum, 8 parts of silicon carbide, 6 parts of calcium hexaluminate, 2 parts of Yongji clay, 4 parts of active magnesium oxide, 10 parts of silicon nitride powder, 5 parts of zircon sand, 5 parts of zinc zirconium silicate powder, 5 parts of andalusite micropowder, 1 part of hercynite micropowder, 5 parts of zinc oxide micropowder and 5 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 5 parts of composite superfine powder, 2 parts of an expanding agent, 1 part of a cement additive and 0.1 part of nano-cellulose.
Example three:
a high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 60 parts of chrome corundum, 10 parts of silicon carbide, 8 parts of calcium hexaluminate, 3 parts of Yongji clay, 5 parts of active magnesium oxide, 12 parts of silicon nitride powder, 6 parts of zircon sand, 6 parts of zinc zirconium silicate powder, 6 parts of andalusite micropowder, 1 part of hercynite micropowder, 6 parts of zinc oxide micropowder and 6 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 5 parts of composite superfine powder, 2 parts of an expanding agent, 1 part of a cement additive and 0.1 part of nano-cellulose.
The high-strength wear-resistant castable is prepared by the following steps:
s1, weighing the raw materials according to the weight, adding water, and mixing by a forced mixer.
S2, weighing the composite superfine powder according to the amount, adding the expanding agent, mixing, and putting into S1 for slow heating expansion.
And S3, adding the cement additive and the nano cellulose, and continuously performing ball milling and mixing to be viscous to prepare the casting material.
S4, forming the mixed castable in a specific mould, drying and demoulding the sample at 135 ℃ for 24 hours, carrying out heat treatment at a lower temperature of about 1500 ℃ for 3 hours, and naturally cooling to obtain the high-strength wear-resistant castable.
Wherein, the water adding amount in S1 is forced to ensure that the amount is about 5-6%, and the ball milling mixing conditions in S3 are as follows: adding zirconia ball grinding beads according to the ball material mass ratio of 10:1, and carrying out ball-milling and mixing under the conditions of revolution rotating speed of 200-300 r/min and rotation rotating speed of 400-600 r/min.
Comparative example:
comparative example one:
a high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 50 parts of chrome corundum, 7 parts of silicon carbide, 5 parts of calcium hexaluminate, 1 part of Yongji clay, 3 parts of active magnesium oxide, 8 parts of silicon nitride powder, 3 parts of zircon sand, 3 parts of zinc zirconium silicate powder, 3 parts of andalusite micropowder, 1 part of hercynite micropowder, 3 parts of zinc oxide micropowder and 3 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 1 part of cement additive and 0.1 part of nano-cellulose.
Comparative example two:
a high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 55 parts of chrome corundum, 8 parts of silicon carbide, 6 parts of calcium hexaluminate, 2 parts of Yongji clay, 4 parts of active magnesium oxide, 10 parts of silicon nitride powder, 5 parts of zircon sand, 5 parts of zinc zirconium silicate powder, 5 parts of andalusite micropowder, 1 part of hercynite micropowder, 5 parts of zinc oxide micropowder and 5 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 1 part of cement additive and 0.1 part of nano-cellulose.
Comparative example three:
a high-strength wear-resistant castable comprises the following raw material components and additional components:
the raw material components are respectively as follows by mass: 60 parts of chrome corundum, 10 parts of silicon carbide, 8 parts of calcium hexaluminate, 3 parts of Yongji clay, 5 parts of active magnesium oxide, 12 parts of silicon nitride powder, 6 parts of zircon sand, 6 parts of zinc zirconium silicate powder, 6 parts of andalusite micropowder, 1 part of hercynite micropowder, 6 parts of zinc oxide micropowder and 6 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 1 part of cement additive and 0.1 part of nano-cellulose.
The high-strength wear-resistant castable is prepared by the following steps:
s1, weighing the raw materials according to the weight, adding water, and mixing by a forced mixer.
And S3, adding the cement additive and the nano cellulose, and continuously performing ball milling and mixing to be viscous to prepare the casting material.
S4, forming the mixed castable in a specific mould, drying and demoulding the sample at 135 ℃ for 24 hours, carrying out heat treatment at a lower temperature of about 1500 ℃ for 3 hours, and naturally cooling to obtain the high-strength wear-resistant castable.
Wherein, the water adding amount in S1 is forced to ensure that the amount is about 5-6%, and the ball milling mixing conditions in S3 are as follows: adding zirconia ball grinding beads according to the ball material mass ratio of 10:1, and carrying out ball-milling and mixing under the conditions of revolution rotating speed of 200-300 r/min and rotation rotating speed of 400-600 r/min.
The following tests were conducted on the above examples one to three and comparative examples one to three:
pouring castable on the inner walls of the cyclone separators respectively;
measuring and recording the diameter and thickness of each casting material to be accurate to 0.1 mm;
putting in grindstone, starting the cyclone separator to continuously operate for 24 hours, gradually increasing the air volume and the vibration volume of the cyclone separator, recording the condition of pouring materials in sequence every hour, and obtaining the following test results:
Figure DEST_PATH_IMAGE001
as can be seen from the data in the table, in each experimental group, it can be found that the test results show that the embodiment is completely superior to the reference example, that is, after the composite superfine powder and the expanding agent are added, the strength and the wear resistance of the casting material can be improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (8)

1. The high-strength wear-resistant castable is characterized by comprising the following raw material components in parts by weight:
the raw material components are respectively as follows by mass: 50-60 parts of chrome corundum, 7-10 parts of silicon carbide, 5-8 parts of calcium hexaluminate, 1-3 parts of Yongji clay, 3-5 parts of active magnesium oxide, 8-12 parts of silicon nitride powder, 3-6 parts of zircon sand, 3-6 parts of zinc zirconium silicate powder, 3-6 parts of andalusite micropowder, 1 part of gahnite micropowder, 3-6 parts of zinc oxide micropowder and 3-6 parts of flint clay;
the external components are respectively calculated according to the parts by weight: 5 parts of composite superfine powder, 2 parts of an expanding agent, 1 part of a cement additive and 0.1 part of nano-cellulose.
2. The high-strength wear-resistant castable according to claim 1, wherein the composite ultrafine powder is a mixture of active silica, alpha-alumina and chromium oxide with a particle size of 2-4 UM.
3. A high-strength wear-resistant castable according to claim 1, wherein said expanding agent is aluminate.
4. A high strength, wear resistant castable material according to claim 1, wherein said cement additive is an OPTEVA (open cell) HE and TAVERO (open cell) VM, at a density of 1 g per cubic centimeter and 1.35 g per cubic centimeter, respectively.
5. The high-strength wear-resistant castable according to claim 1, wherein the Yongji clay is 300 meshes, the zinc zirconium silicate powder is 500 meshes, the andalusite micropowder is 600 meshes, the hercynite micropowder is 600 meshes, and the zinc oxide micropowder is 300 meshes.
6. The preparation method of the high-strength wear-resistant castable is characterized by comprising the following steps:
s1, weighing the raw materials according to the amount, adding water, and mixing by a forced mixer;
s2, weighing the composite superfine powder according to the amount, adding an expanding agent, mixing, and putting into S1 for slow heating expansion;
s3, adding a cement additive and nano-cellulose, and continuously performing ball milling and mixing to a viscous state to prepare a casting material;
s4, forming the mixed castable in a specific mould, drying and demoulding the sample at 135 ℃ for 24 hours, carrying out heat treatment at a lower temperature of about 1500 ℃ for 3 hours, and naturally cooling to obtain the high-strength wear-resistant castable.
7. The high-strength wear-resistant castable according to claim 1, wherein the amount of water added in S1 is forced to be guaranteed to be about 5% -6%.
8. The high-strength wear-resistant castable according to claim 1, wherein the ball milling mixing conditions in S3 are as follows: adding zirconia ball grinding beads according to the ball material mass ratio of 10:1, and carrying out ball-milling and mixing under the conditions of revolution rotating speed of 200-300 r/min and rotation rotating speed of 400-600 r/min.
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