阅读说明：本技术 高导热碳质复合压入料的压入方法和制备方法 (Pressing-in method and preparation method of high-heat-conductivity carbon composite pressing material ) 是由 侯建 王计平 田鹏 于 2019-10-14 设计创作，主要内容包括：本发明涉及高导热碳质复合压入料的压入方法和制备方法,实时监测高炉炉缸的侵蚀轮廓,根据侵蚀轮廓的变化即可推断出碳砖和冷却壁之间由于热胀冷缩出现的裂缝情况；根据裂缝的位置及裂缝大小的情况确定灌浆的位置及所需压入料的重量级灌浆压力；通过灌浆设备连接在灌浆孔上并将高导热碳质复合压入料压入到裂缝处,完成封堵。本发明解决了砖衬空隙造成导热不良的后果,在600℃以上高温区间快速烧结固化,且材质与炉缸碳砖接近,没有任何负面反应,并且可以在线压入。(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.)

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.

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.