CN110724780A - Pressing-in method and preparation method of high-heat-conductivity carbon composite pressing material - Google Patents
Pressing-in method and preparation method of high-heat-conductivity carbon composite pressing material Download PDFInfo
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- CN110724780A CN110724780A CN201910973347.7A CN201910973347A CN110724780A CN 110724780 A CN110724780 A CN 110724780A CN 201910973347 A CN201910973347 A CN 201910973347A CN 110724780 A CN110724780 A CN 110724780A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2003/1034—Materials or components characterised by specific properties
- C09K2003/1059—Heat-curable materials
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Abstract
The invention relates to a pressing-in method and a preparation method of a high-thermal-conductivity carbonaceous composite pressing material, wherein the erosion profile of a blast furnace hearth is monitored in real time, and the crack condition between a carbon brick and a cooling wall due to expansion with heat and contraction with cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack; and connecting the carbon composite pressing material with high heat conductivity to a grouting hole through grouting equipment, and pressing the carbon composite pressing material with high heat conductivity into a crack to finish plugging. The invention solves the problem of poor heat conduction caused by gaps of the brick lining, rapidly sinters and solidifies at a high temperature range of more than 600 ℃, has the material close to the hearth carbon brick, has no any negative reaction, and can be pressed in on line.
Description
Technical Field
The invention belongs to the field of maintenance of blast furnaces, and particularly relates to a pressing-in method and a preparation method of a high-heat-conductivity carbon composite pressing material.
Background
The refractory material at the hearth part requires high heat conduction and stable physical and chemical properties, so the material of the corresponding cooling equipment should be good in heat conduction performance, large in cooling strength and small in elongation, and the material of the hearth cooling wall body is generally made of gray cast iron. But because the high heat-conducting property cooling wall body, the blast furnace shell and the expansion coefficients of carbon bricks in the furnace are different, the volume change generated along with the temperature change causes a gap between the cooling wall and the brick lining, the heat accumulated on the brick lining can not be taken away by cooling water in time, and the protection of the cooling equipment on the brick lining is actually reduced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the volume change caused by the temperature change causes a problem of generating a gap between the stave and the brick lining.
The invention is realized by the following technical scheme:
the pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
(1) monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) and connecting the carbon composite pressing material with high heat conductivity to a grouting hole through grouting equipment, and pressing the carbon composite pressing material with high heat conductivity into a crack to finish plugging.
Further, the method comprises the following steps: and controlling the grouting pressure to be 2-8 MP.
The preparation method of the high-thermal-conductivity carbonaceous composite pressed material comprises the following steps:
the method comprises the following steps: adding 45-60 parts of resin into 2-5 parts of aqueous solution of a surfactant, and uniformly stirring to obtain a premix;
step two: adding 20-30 parts of graphite powder, 10-20 parts of expanded graphite, 4-8 parts of aluminum nitride particles, 3-6 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbon composite press-in material after stirring.
The preparation method of the high-thermal-conductivity carbonaceous composite pressed material comprises the following steps:
the method comprises the following steps: adding 50 parts of resin into 3 parts of aqueous solution of surfactant, and uniformly stirring to obtain premix;
step two: adding 25 parts of graphite powder, 15 parts of expanded graphite, 7 parts of aluminum nitride particles, 4 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbonaceous composite press-in material after stirring.
It is preferable that: the surfactant is sodium dodecyl sulfate and/or sodium hexadecyl sulfate.
It is preferable that: the resin is epoxy resin.
Compared with the prior art, the invention has the following beneficial technical effects: the hot surface and the furnace bottom of the cooling wall are pressed by the high-heat-conductivity carbon composite pressed material, and the high-heat-conductivity carbon composite pressed material has the characteristics of good high-temperature fluidity, strong low-temperature cohesiveness and good heat conductivity, and is very suitable for the working condition of the part. The material is pressed in, so that the grouting material can be kept in a liquid phase flowing state between the cooling wall and the brick lining for a long time, the brick lining, the cooling wall and the furnace shell cannot be damaged due to high curing strength, the problem of poor heat conduction caused by gaps of the brick lining is thoroughly solved due to high heat conduction performance, the material is quickly sintered and cured in a high-temperature range of more than 600 ℃, the material is close to a hearth carbon brick, no negative reaction exists, the material can be pressed in on line, and the material is a good measure for solving the problems.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, particular embodiments of the present invention are described in detail. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention, and the described embodiments are merely a subset of the embodiments of the present invention, rather than a complete embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: the pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
the preparation process of the high-heat-conductivity carbon composite pressing material comprises the following steps: adding 45 parts of epoxy resin into 2 parts of sodium dodecyl sulfate, and uniformly stirring to obtain a premix; because the epoxy resin has thermosetting property, does not generate small-molecule volatile matters during curing, and has high bonding strength, the epoxy resin is selected as the bonding agent, the bonding quality depends on wettability, the wetting is good, an adherend and bonding agent molecules are closely contacted and then adsorbed, huge intermolecular force is generated on a bonding interface, gas adsorbed on the surface of an admixture can be eliminated, the porosity of the bonding interface is reduced, and in order to increase the wetting capacity of the bonding agent, a proper amount of sodium dodecyl sulfate is required to be added, so that the surface tension is reduced.
Adding 20 parts of graphite powder, 10 parts of expanded graphite, 6 parts of aluminum nitride particles, 3 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and preparing a high-thermal-conductivity carbon composite press-in material after stirring; the expanded graphite has good heat-conducting property of natural graphite, and fills a gap between a blast furnace hearth and a cooling wall by utilizing the property that the volume of the expanded graphite can be rapidly expanded when the expanded graphite meets high temperature, so that a very good heat-insulating layer is formed after filling, and less smoke is generated by effective heat insulation; the aluminum nitride particles have high thermal conductivity, and the strength of the high-thermal-conductivity carbon composite press-in material can be effectively improved by adding the aluminum nitride particles into the high-thermal-conductivity carbon composite press-in material; the high-thermal-conductivity epoxy resin-based composite material is obtained by mixing epoxy resin, a curing agent and a ceramic shell according to a specific proportion and performing a certain preparation process, the raw materials adopted by the high-thermal-conductivity epoxy resin-based composite material are all low-price and chemically stable materials, and the cost is reduced.
2. The pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
(1) monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) connecting the carbon composite pressing material with high thermal conductivity to a grouting hole through grouting equipment, pressing the prepared carbon composite pressing material with high thermal conductivity to a crack, and completing plugging; the grouting pressure is controlled to be 2-6 MP.
Example 2: the pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
1. preparation of high-heat-conductivity carbon composite pressed material
Adding 50 parts of resin into 3 parts of hexadecyl sodium sulfate, and uniformly stirring to obtain a premix; adding 25 parts of graphite powder, 15 parts of expanded graphite, 7 parts of aluminum nitride particles, 3 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbonaceous composite press-in material after stirring.
2. Pressing-in of high-heat-conductivity carbon-based composite pressing material
(1) Monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) connecting the carbon composite pressing material with high thermal conductivity to a grouting hole through grouting equipment, pressing the prepared carbon composite pressing material with high thermal conductivity to a crack, and completing plugging; the grouting pressure is controlled to be 2-6 MP.
Example 3: the pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
1. preparation of high-heat-conductivity carbon composite pressed material
Adding 60 parts of resin into 5 parts of hexadecyl sodium sulfate, and uniformly stirring to obtain a premix; adding 30 parts of graphite powder, 20 parts of expanded graphite, 12 parts of aluminum nitride particles, 6 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbonaceous composite press-in material after stirring.
2. Pressing-in of high-heat-conductivity carbon-based composite pressing material
(1) Monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) connecting the carbon composite pressing material with high thermal conductivity to a grouting hole through grouting equipment, pressing the prepared carbon composite pressing material with high thermal conductivity to a crack, and completing plugging; the grouting pressure is controlled to be 2-6 MP.
Example 4: the pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
1. preparation of high-heat-conductivity carbon composite pressed material
Adding 47 parts of resin into 4 parts of hexadecyl sodium sulfate, and uniformly stirring to obtain a premix; adding 22 parts of graphite powder, 12 parts of expanded graphite, 5 parts of high-thermal-conductivity epoxy resin-based composite material, 6 parts of aluminum nitride particles and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbonaceous composite press-in material after stirring.
2. Pressing-in of high-heat-conductivity carbon-based composite pressing material
(1) Monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) connecting the carbon composite pressing material with high thermal conductivity to a grouting hole through grouting equipment, pressing the prepared carbon composite pressing material with high thermal conductivity to a crack, and completing plugging; the grouting pressure is controlled to be 2-6 MP.
Example 5: the pressing-in method of the high-heat-conductivity carbonaceous composite pressing material comprises the following steps:
1. preparation of high-heat-conductivity carbon composite pressed material
Adding 48 parts of resin into 5 parts of hexadecyl sodium sulfate, and uniformly stirring to obtain a premix; adding 28 parts of graphite powder, 18 parts of expanded graphite, 5 parts of high-thermal-conductivity epoxy resin-based composite material, 10 parts of aluminum nitride particles and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbonaceous composite press-in material after stirring.
2. Pressing-in of high-heat-conductivity carbon-based composite pressing material
(1) Monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) connecting the carbon composite pressing material with high thermal conductivity to a grouting hole through grouting equipment, pressing the prepared carbon composite pressing material with high thermal conductivity to a crack, and completing plugging; the grouting pressure is controlled to be 2-6 MP.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Claims (6)
1. The pressing-in method of the high-heat-conductivity carbonaceous composite pressing material is characterized by comprising the following steps of:
(1) monitoring the erosion profile of the blast furnace hearth in real time: a plurality of thermocouples are orderly arranged in the blast furnace hearth, the data of the thermocouples and the hot strong flow data of the cooling wall are monitored in real time, the data of the thermocouples and the hot strong flow data of the cooling wall are combined to accurately reflect an actual erosion profile, and the crack condition between the carbon brick and the cooling wall due to expansion caused by heat and contraction caused by cold can be deduced according to the change of the erosion profile; determining the grouting position and the gravimetric grouting pressure of the required injection material according to the position of the crack and the size of the crack;
(2) determining the position of a grouting hole: selecting the position of a grouting hole according to the position needing grouting in the step one, cleaning the outer wall of the furnace shell, forming a plurality of grouting holes in the furnace shell of the blast furnace, and mounting a valve on the grouting holes;
(3) and connecting the carbon composite pressing material with high heat conductivity to a grouting hole through grouting equipment, and pressing the carbon composite pressing material with high heat conductivity into a crack to finish plugging.
2. The pressing method of the high-thermal-conductivity carbonaceous composite pressed material according to claim 1, wherein the grouting pressure is controlled to be 2-8 MP.
3. The preparation method of the high-thermal-conductivity carbonaceous composite pressed material is characterized by comprising the following steps of:
the method comprises the following steps: adding 45-60 parts of resin into 2-5 parts of aqueous solution of a surfactant, and uniformly stirring to obtain a premix;
step two: adding 20-30 parts of graphite powder, 10-20 parts of expanded graphite, 4-8 parts of aluminum nitride particles, 3-6 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbon composite press-in material after stirring.
4. The preparation method of the high thermal conductivity carbonaceous composite input material according to claim 1, characterized by comprising the steps of:
the method comprises the following steps: adding 50 parts of resin into 3 parts of aqueous solution of surfactant, and uniformly stirring to obtain premix;
step two: adding 25 parts of graphite powder, 15 parts of expanded graphite, 7 parts of aluminum nitride particles, 4 parts of high-thermal-conductivity epoxy resin-based composite material and premix into a stirrer, stirring for 20 minutes, and obtaining the high-thermal-conductivity carbonaceous composite press-in material after stirring.
5. The method for preparing the high thermal conductivity carbonaceous composite extrusion material as claimed in claim 1, wherein the surfactant is sodium dodecyl sulfate and/or sodium hexadecyl sulfate.
6. The method of claim 1, wherein the resin is an epoxy resin.
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| CN113088592A (en) * | 2021-04-08 | 2021-07-09 | 包头市安德窑炉科技有限公司 | Online grouting process for cold and hot surfaces of blast furnace |
| CN114891940A (en) * | 2022-04-18 | 2022-08-12 | 大连科萌工程材料有限公司 | Method for hot-face grouting of blast furnace carbon brick |
| CN114891941A (en) * | 2022-04-18 | 2022-08-12 | 阳春新钢铁有限责任公司 | Judgment and treatment process for air gap of blast furnace hearth |
| CN115637065A (en) * | 2022-09-29 | 2023-01-24 | 包头市安德窑炉科技有限公司 | Application of cerium oxide-containing iron slag in preparation of radiation material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113088592A (en) * | 2021-04-08 | 2021-07-09 | 包头市安德窑炉科技有限公司 | Online grouting process for cold and hot surfaces of blast furnace |
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| CN115637065B (en) * | 2022-09-29 | 2023-10-13 | 包头市安德窑炉科技有限公司 | Application of cerium-iron oxide-containing slag in preparation of radiation material |
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| CN110724780B (en) | 2022-03-04 |
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Denomination of invention: The pressing method of high thermal conductivity carbon composite pressing material Effective date of registration: 20230602 Granted publication date: 20220304 Pledgee: Shanghai Pudong Development Bank Co.,Ltd. Baotou Branch Pledgor: BAOTOU ANDE KILN TECHNOLOGY Co.,Ltd. Registration number: Y2023150000076 |