Environment-friendly high-thermal-conductivity carbon ramming mix and preparation method thereof

Abstract

The application discloses an environment-friendly high-thermal-conductivity carbon ramming mixture and a preparation method thereof. The carbon ramming mixture comprises a powder and dimethyl silicone oil. The powder comprises the following components in percentage by mass: high-power graphite particles 55-60%, high-power graphite powder 30-35%, spherical graphite 5-10%, copper powder 0.5-2% and conductive carbon black 0.5-1%. The mass of the dimethyl silicone oil is 15-20% of the mass of the powder. The copper powder and the conductive carbon black are dispersed in the dimethyl silicone oil in advance, and then are mixed with the high-power graphite particles, the spherical graphite and the high-power graphite powder to obtain a mixture. The obtained carbon ramming mixture has excellent thermal conductivity, and has good flatness after construction, which is beneficial to the contact between the ramming mixture and the carbon brick, can effectively transfer the heat of the carbon brick in time, and prolongs the service life of a blast furnace. Meanwhile, the carbon ramming mixture has low cost, is environment-friendly, and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of carbon ramming material, and particularly relates to an environment-friendly high-thermal-conductivity carbon ramming material and a preparation method thereof. BACKGROUND

[0002] Carbon ramming material is widely used for filling and ramming between the gap between the carbon brick and the cooling wall, and the leveling layer above the center line of the water-cooled pipe of the furnace bottom. The carbon ramming material after ramming is required to have certain strength and density, not only to prevent the leakage of molten iron and slag, but also to play a key role in transmitting the heat of the carbon brick out, which is taken away by the cooling water, so as to maintain a balance of heat inside and outside the blast furnace, slow down the erosion speed of the carbon brick under high temperature, and ensure the normal operation of the blast furnace smelting.

[0003] Traditional carbon ramming material is usually mixed with high-temperature electric-forging anthracite, petroleum coke, artificial graphite as main raw materials, and phenolic resin, coal tar pitch and coal tar as binding agents. Although these raw materials are widely available and low in cost, the traditional carbon ramming material has some defects. On the one hand, the anthracite, petroleum coke and artificial graphite materials used at present have low thermal conductivity and large friction coefficient between particles, poor construction performance, uneven particle distribution after ramming, which leads to insufficient contact between the material and the carbon brick, and reduces the heat transfer efficiency. On the other hand, the binding agents such as phenolic resin, coal tar pitch and coal tar contain certain carcinogens and have strong pungent odor, which poses a serious threat to the health of construction personnel, and the pitch and tar will release yellow toxic gas during high-temperature baking, causing serious environmental pollution.

[0004] A kind of carbon ramming material (CN202210151403.0) refines combination through particle grading below 0.5mm, so that the material has good construction performance, and the heat transfer efficiency of the ramming material is improved. However, the use of a large amount of flake graphite may affect the compactness of the ramming material, and the binding agent is still phenolic resin, so the environmental protection problem has not been effectively solved.

[0005] A kind of directional heat-conducting carbon ramming material and its preparation method (CN202110194379.4) uses graphite electrode waste and flake graphite as main raw materials, and coal tar as binding agent, and the prepared carbon ramming material has certain buffering performance, but the thermal conductivity is anisotropic, and the impurities in the graphite electrode waste may affect the construction performance and thermal conductivity, and the use of coal tar as binding agent also faces environmental protection problems.

[0006] The "ramming material for the gap between the hearth and the bottom of a blast furnace" (CN201010153111.8) uses a ramming material made of all-natural graphite, which, after curing at 110°C, has a thermal conductivity of more than 18 W / mK, which is excellent in matching the thermal conductivity of carbon bricks. However, different shapes of natural graphite can have a great impact on the construction performance, and the binder is phenolic resin, which still faces environmental problems.

[0007] The "high-thermal-conductivity carbon ramming material for large blast furnaces" (CN200910172485.1) improves the thermal conductivity of the carbon ramming material by adding high-thermal-conductivity flake graphite and copper powder, and tar, resin and tung oil are used as the binding system. The preparation process is complex, the cost is high, and the binder contains tar, resin and other substances, so the environmental problem has not been effectively solved.

[0008] From the above disclosed patent technologies, it can be seen that most of the current carbon ramming materials use flake graphite to improve their thermal conductivity. However, flake graphite has anisotropy in thermal conductivity and has a large elastic aftereffect, which may affect the thermal conductivity and density of the carbon ramming material. At the same time, the use of resin, tar and other substances as binders always faces environmental problems. Therefore, it is a technical problem to be solved to improve the construction performance of carbon ramming material by optimizing the material composition, improve the thermal efficiency, and solve the environmental problem. SUMMARY

[0009] The purpose of the present application is to provide an environmentally friendly high-thermal-conductivity carbon ramming material and a preparation method thereof. The obtained carbon ramming material has excellent thermal conductivity, good flatness after construction, which is beneficial to the contact between the ramming material and the carbon bricks, can effectively transfer the heat of the carbon bricks in time, and thus prolong the service life of the blast furnace. At the same time, it has low cost, is environmentally friendly, and has a wide application prospect.

[0010] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0011] An environmentally friendly high-thermal-conductivity carbon ramming material is provided, which comprises a powder and dimethyl silicone oil; wherein:

[0012] The powder comprises the following components by mass percentage: high-power graphite particles 55-60%, high-power graphite powder 30-35%, spherical graphite 5-10%, copper powder 0.5-2%, and conductive carbon black 0.5-1%;

[0013] The mass of the dimethyl silicone oil is 15-20% of the mass of the powder;

[0014] The copper powder and conductive carbon black are added to the dimethyl silicone oil in advance and dispersed uniformly.

[0015] According to the above scheme, the high-power graphite particles with three gradations of particle size of 5-3mm, 3-1mm and 1-0mm are mixed in a mass ratio of 1:(3.0-3.5):(2.0-2.5), and the carbon content is ≥98%.

[0016] According to the above scheme, the high-power graphite powder has a particle size of ≤0.074mm and a carbon content of ≥98%.

[0017] According to the above scheme, the high-power graphite particles and the high-power graphite powder are products of crushing waste high-power graphite electrodes.

[0018] According to the above scheme, the spherical graphite particle size is ≤0.074mm and the carbon content is ≥99%.

[0019] According to the above scheme, the copper powder has a particle size of ≤0.045mm and a copper content of ≥99%.

[0020] According to the above scheme, the conductive carbon black has a particle size of ≤0.074mm and a carbon content of ≥98%.

[0021] According to the above scheme, the dimethyl silicone oil is liquid with a viscosity of 100-150 mm. 2 / s, density is 0.96~0.97g / cm³ 3 .

[0022] A method for preparing the above-mentioned environmentally friendly high thermal conductivity carbon ramming mix is ​​provided, specifically including the following steps:

[0023] According to the above raw materials and proportions, high-power graphite particles, spherical graphite, and high-power graphite powder are first mixed to obtain a mixture; then copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly, and then added to the mixture and pounded to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0024] According to the above scheme, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3-5 minutes to obtain a mixture.

[0025] Mix and grind for 10-15 minutes according to the above method.

[0026] This invention provides an environmentally friendly, high thermal conductivity carbon ramming mix, using high-power graphite particles and high-power graphite powder as the main raw materials, combined with spherical graphite, and further mixed with dimethyl silicone oil containing copper powder and conductive carbon black, wherein:

[0027] High-power graphite particles and high-power graphite powder are the crushed products of waste high-power graphite electrodes. They have good thermal conductivity and can be used as the main raw material for ramming mix, which not only improves thermal conductivity but also effectively reduces costs.

[0028] Carbon ramming mix requires a tight bond between particles and powder. Uneven dispersion leads to powder agglomeration, voids between particles, and other defects, making it difficult to ram and shape, resulting in poor workability. The rammed material surface has pits and blemishes, reducing its thermal conductivity and affecting its aesthetics. This invention introduces spherical graphite, which, due to its low coefficient of friction, promotes the rearrangement of high-power graphite particles during ramming. This results in uniform dispersion of high-power graphite particles and powder, increasing the bulk density of the carbon ramming mix, reducing powder agglomeration, filling internal defects, improving workability, and enhancing thermal conductivity. The smoothness of the ramming mix after construction is significantly improved, with no obvious pits or blemishes. The gaps between the cooling wall and the carbon bricks are well filled, and the contact between the ramming mix and the carbon bricks is good, enabling timely and effective heat transfer and extending the service life of the blast furnace. Furthermore, spherical graphite exhibits isotropic thermal conductivity, has a more regular surface shape, and its thermal conductivity is less affected by the ramming direction, resulting in more stable thermal conductivity and higher thermal efficiency after ramming.

[0029] Furthermore, this invention uses dimethyl silicone oil, a mixture of copper powder and carbon black, as a binder. Copper powder, with its small particle size, effectively fills the gaps between ramming mixes, increasing their density and thus improving thermal conductivity. However, copper powder has a high density and is difficult to mix with carbonaceous materials, easily precipitating when added to the powder, resulting in uneven distribution and affecting thermal conductivity. This invention avoids the uneven distribution problem caused by the high density and poor compatibility of copper powder by adding it to dimethyl silicone oil. Pre-adding carbon black to the dimethyl silicone oil not only ensures uniform carbon black distribution but also improves the bonding performance between the dimethyl silicone oil and high-power graphite particles and powder, enhancing thermal conductivity. Simultaneously, the dimethyl silicone oil binder itself has good thermal conductivity and high viscosity, enabling tight bonding between particles and powder, reducing gaps and pores between particles, increasing the density of the ramming mix, and significantly improving the thermal conductivity of carbon ramming mix. In addition, dimethyl silicone oil is safe and non-toxic, ensuring the health of construction workers, and its high-temperature baking process is pollution-free, making it very environmentally friendly.

[0030] The beneficial effects of this invention are as follows:

[0031] 1. This invention provides an environmentally friendly, high thermal conductivity carbon ramming mix, which uses high-power graphite particles and high-power graphite powder as the main raw materials, combined with spherical graphite, and further mixed with dimethyl silicone oil containing copper powder and conductive carbon black. This improves the bulk density of the carbon ramming mix, giving it excellent thermal conductivity. The ramming mix has good flatness after construction, which is conducive to the contact between the ramming mix and the carbon bricks, enabling timely and effective heat transfer from the carbon bricks, thereby extending the service life of the blast furnace. At the same time, it is low in cost, environmentally friendly, and has broad application prospects.

[0032] 2. This invention provides a method for preparing an environmentally friendly high thermal conductivity carbon ramming mix. Copper powder and conductive carbon black are pre-dispersed in dimethyl silicone oil, which is beneficial for the uniform dispersion of copper powder and carbon black in the system and the bonding performance between dimethyl silicone oil and carbonaceous raw materials. The uniform mixing between the powder and dimethyl silicone oil is beneficial for improving the thermal conductivity, bulk density and smoothness of the ramming mix after construction. Moreover, the process is simple, the raw materials are inexpensive and readily available, which is conducive to industrial application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] The performance indicators of the raw materials used in the embodiments of this invention are as follows:

[0035] The high-power graphite particles and the high-power graphite powder are products of crushing waste high-power graphite electrodes; wherein: the high-power graphite particles are composed of three gradations with particle sizes of 5-3mm, 3-1mm, and 1-0mm, mixed in a mass ratio of 1:(3.0-3.5):(2.0-2.5), with a carbon content ≥98%; the high-power graphite powder has a particle size ≤0.074mm and a carbon content ≥98%.

[0036] The spherical graphite particles have a size of ≤0.074mm and a carbon content of ≥99%.

[0037] The copper powder has a particle size of ≤0.045mm and a copper content of ≥99%.

[0038] The conductive carbon black has a particle size of ≤0.074mm and a carbon content of ≥98%.

[0039] Dimethyl silicone oil is a liquid with a viscosity of 100-150 mm. 2 / s, density is 0.96~0.97g / cm³ 3 .

[0040] Example 1

[0041] An environmentally friendly, high thermal conductivity carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0042] 55% high-power graphite particles, 35% high-power graphite powder, 7% spherical graphite, 2% copper powder, 1% conductive carbon black, and an additional 17.5% by weight of dimethyl silicone oil of the above powders.

[0043] The preparation of the above-mentioned ramming material includes the following steps:

[0044] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0045] The bulk density of the material after tamping and molding is 1.78 g / cm³. 3 After drying at 110℃, its thermal conductivity can reach 27.28W / (m·K). The material surface is flat and smooth, the gaps are completely filled, and it has good contact with the carbon brick, resulting in high heat transfer efficiency that matches the heat transfer coefficient of the carbon brick. At the same time, the material is safe, environmentally friendly, and environmentally friendly.

[0046] Comparative Example 1

[0047] A carbon ramming mix is ​​provided, which does not contain spherical graphite, but uses high-power graphite powder in the same proportion instead of spherical graphite. The specific composition of the raw materials by mass percentage is as follows:

[0048] 55% high-power graphite particles, 42% high-power graphite powder, 2% copper powder, 1% conductive carbon black, and an additional 17.5% dimethyl silicone oil by weight of the above powders.

[0049] According to the above raw materials and proportions, first mix high-power graphite particles and high-power graphite powder for 3 minutes; then add copper powder and conductive carbon black to dimethyl silicone oil and mix evenly, then add it to the mixture of high-power graphite particles and high-power graphite powder and mix for 10 minutes to obtain carbon ramming mix.

[0050] The bulk density of the material after tamping and molding is 1.73 g / cm³. 3 After drying at 110℃, its thermal conductivity was measured to be 19.59 W / (m·K). The ramming material had poor workability, with powder agglomeration, uneven particle distribution, and pitted surface.

[0051] Example 2

[0052] An environmentally friendly, high thermal conductivity carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0053] The composition consists of 60% high-power graphite particles, 33% high-power graphite powder, 5% spherical graphite, 1% copper powder, 1% conductive carbon black, and an additional 16.8% by weight of dimethyl silicone oil of the total weight of the above powders.

[0054] The preparation of the above-mentioned ramming material includes the following steps:

[0055] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0056] The bulk density of the material after tamping and molding is 1.75 g / cm³. 3 After drying at 110℃, its thermal conductivity can reach 26.47W / (m·K). The material surface is relatively flat and smooth, the gaps are completely filled, and it has good contact with the carbon brick. It has high heat transfer efficiency and matches the heat transfer coefficient of the carbon brick. At the same time, the material is safe, environmentally friendly and environmentally friendly.

[0057] Comparative Example 2

[0058] A carbon ramming mix is ​​provided, which does not contain dimethyl silicone oil, but uses phenolic resin in the same proportion instead of dimethyl silicone oil. The specific composition of the raw materials by mass percentage is as follows:

[0059] The composition consists of 60% high-power graphite particles, 33% high-power graphite powder, 5% spherical graphite, 1% copper powder, 1% conductive carbon black, and an additional 17.5% by weight of phenolic resin of the above powders.

[0060] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to phenolic resin and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain carbon ramming mix.

[0061] The bulk density of the material after tamping and molding is 1.72 g / cm³. 3 After drying at 110℃, its thermal conductivity was measured to be 22.38 W / (m·K). The surface of the material was relatively smooth and flat. Its thermal conductivity was lower than that of the environmentally friendly high thermal conductivity carbon ramming mix prepared in Example 2. The material emitted a pungent odor and produced yellow smoke during baking, which caused significant environmental pollution.

[0062] Example 3

[0063] An environmentally friendly, high thermal conductivity carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0064] 57% high-power graphite particles, 31.5% high-power graphite powder, 10% spherical graphite, 0.5% copper powder, 1% conductive carbon black, and an additional 15.9% by weight of dimethyl silicone oil of the above powders.

[0065] The preparation of the above-mentioned ramming material includes the following steps:

[0066] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0067] The bulk density of the material after tamping and molding is 1.75 g / cm³. 3 After drying at 110℃, its thermal conductivity can reach 28.24W / (m·K). The material surface is relatively flat and smooth, the gaps are completely filled, and it has good contact with the carbon brick. It has high heat transfer efficiency and matches the heat transfer coefficient of the carbon brick. At the same time, the material is safe, environmentally friendly and environmentally friendly.

[0068] Comparative Example 3

[0069] A carbon ramming mix is ​​provided, which does not contain copper powder, but uses conductive carbon black in the same proportion instead of copper powder. The specific composition of the raw materials by mass percentage is as follows:

[0070] 57% high-power graphite particles, 31.5% high-power graphite powder, 10% spherical graphite, 1.5% conductive carbon black, and an additional 15.9% by weight of dimethyl silicone oil of the above powders.

[0071] According to the above raw materials and proportions, first mix high-power graphite particles, spherical graphite, and high-power graphite powder for 3 minutes; then add conductive carbon black to dimethyl silicone oil and mix evenly, and then add it to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and mix for 10 minutes to obtain carbon ramming mix.

[0072] The bulk density of the material after tamping and molding is 1.71 g / cm³. 3 After drying at 110℃, its thermal conductivity was measured to be 24.12 W / (m·K). The material surface was rough and uneven, and its thermal conductivity was lower than that of the carbon ramming mix prepared in Example 3.

[0073] Example 4

[0074] An environmentally friendly, high thermal conductivity carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0075] 57% high-power graphite particles, 31.5% high-power graphite powder, 10% spherical graphite, 1% copper powder, 0.5% conductive carbon black, and an additional 16.3% by weight of dimethyl silicone oil of the above powders.

[0076] The preparation of the above-mentioned carbon ramming mix includes the following steps:

[0077] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0078] The bulk density of the material after tamping and molding is 1.77 g / cm³. 3 After drying at 110℃, its thermal conductivity can reach 29.87W / (m·K). The material surface is relatively flat and smooth, the gaps are completely filled, and it has good contact with the carbon brick. It has high heat transfer efficiency and matches the heat transfer coefficient of the carbon brick. At the same time, the material is safe, environmentally friendly and environmentally friendly.

[0079] Comparative Example 4

[0080] A carbon ramming mix is ​​provided, which does not contain conductive carbon black, but replaces the conductive carbon black with copper powder in the same proportion. The specific composition of the raw materials by mass percentage is as follows:

[0081] 57% high-power graphite particles, 31.5% high-power graphite powder, 10% spherical graphite, 1.5% copper powder, and an additional 16.3% by weight of dimethyl silicone oil of the above powders.

[0082] According to the above raw materials and proportions, first mix high-power graphite particles, spherical graphite, and high-power graphite powder for 3 minutes; then add copper powder to dimethyl silicone oil and mix evenly, then add it to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and grind for 10 minutes to obtain carbon ramming mix.

[0083] The bulk density of the material after tamping and molding is 1.78 g / cm³. 3 After drying at 110℃, its thermal conductivity was measured to be 23.92 W / (m·K). The material surface was relatively smooth, but its thermal conductivity was lower than that of the carbon ramming mix prepared in Example 4.

[0084] Example 5

[0085] An environmentally friendly, high thermal conductivity carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0086] 55% high-power graphite particles, 35% high-power graphite powder, 8.5% spherical graphite, 1% copper powder, 0.5% conductive carbon black, and additionally weigh 18.9% of the total weight of the above powders in dimethyl silicone oil.

[0087] The preparation of the above-mentioned carbon ramming mix includes the following steps:

[0088] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0089] The bulk density of the material after tamping and molding is 1.76 g / cm³. 3 After drying at 110℃, its thermal conductivity can reach 27.65W / (m·K). The material surface is relatively flat and smooth, the gaps are completely filled, and it has good contact with the carbon brick. It has high heat transfer efficiency and matches the heat transfer coefficient of the carbon brick. At the same time, the material is safe, environmentally friendly and environmentally friendly.

[0090] Comparative Example 5

[0091] A carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0092] 55% high-power graphite particles, 35% high-power graphite powder, 8.5% spherical graphite, 1% copper powder, 0.5% conductive carbon black, and additionally weigh 18.9% of the total weight of the above powders in dimethyl silicone oil.

[0093] According to the above raw materials and proportions, first mix high-power graphite particles, spherical graphite, high-power graphite powder, copper powder, and conductive carbon black for 3 minutes; then add dimethyl silicone oil to the mixture of high-power graphite particles, spherical graphite, high-power graphite powder, copper powder, and conductive carbon black and mix and grind for 10 minutes to obtain carbon ramming mix.

[0094] The bulk density of the material after tamping and molding is 1.72 g / cm³. 3 After drying at 110℃, its thermal conductivity was measured to be 24.87 W / (m·K). Cracks were generated on the surface of the material, resulting in poor tamping performance and lower thermal conductivity than the carbon tamping material prepared in Example 5.

[0095] Example 6

[0096] An environmentally friendly, high thermal conductivity carbon ramming mix is ​​provided, the raw material composition by mass percentage is as follows:

[0097] 55% high-power graphite particles, 33% high-power graphite powder, 10% spherical graphite, 1% copper powder, 1% conductive carbon black, and an additional 18.2% by weight of dimethyl silicone oil of the above powders.

[0098] The preparation of the above-mentioned carbon ramming mix includes the following steps:

[0099] According to the above raw materials and proportions, firstly, high-power graphite particles, spherical graphite, and high-power graphite powder are mixed for 3 minutes; then, copper powder and conductive carbon black are added to dimethyl silicone oil and mixed evenly. Subsequently, this mixture is added to the mixture of high-power graphite particles, spherical graphite, and high-power graphite powder and ground for 10 minutes to obtain environmentally friendly high thermal conductivity carbon ramming mix.

[0100] The bulk density of the material after tamping and molding is 1.78 g / cm³. 3 After drying at 110℃, its thermal conductivity can reach 29.36W / (m·K). The material surface is relatively flat and smooth, the gaps are completely filled, and it has good contact with the carbon brick. It has high heat transfer efficiency and matches the heat transfer coefficient of the carbon brick. At the same time, the material is safe, environmentally friendly and environmentally friendly.

[0101] The carbon ramming mix prepared in the above embodiments exhibits excellent on-site construction performance, is easy to ram, and produces a smooth, evenly distributed surface after ramming, free from pitting or unevenness. It fills gaps well, maintains close contact with the carbon bricks, and has high thermal conductivity, effectively transferring heat from the furnace bottom carbon bricks to the furnace bottom cooling system. This slows down the erosion of the carbon bricks by high temperatures, ensuring the normal operation of the blast furnace, effectively extending its lifespan, and reducing enterprise costs, resulting in significant economic benefits. Furthermore, the use of dimethyl silicone oil as a binder ensures safety, environmental friendliness, and non-toxicity, protecting the health of construction workers and the natural environment, aligning with the concepts and requirements of green and sustainable development.

[0102] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An environmentally friendly high thermal conductive carbon ramming mass, characterized in that, It comprises powder and dimethyl silicone oil; wherein: The powder comprises the following components by mass percentage: high-power graphite particles 55-60%, high-power graphite powder 30-35%, spherical graphite 5-10%, copper powder 0.5-2%, and conductive carbon black 0.5-1%; The mass of the dimethyl silicone oil is 15-20% of the total mass of the powder; The copper powder and the conductive carbon black are added into the dimethyl silicone oil and uniformly dispersed; The particle size of the copper powder is ≤0.045 mm; The high-power graphite particles and the high-power graphite powder are products obtained by crushing discarded high-power graphite electrodes.

2. The environmentally friendly high thermal conductivity carbon ramming mass according to claim 1, characterized in that, The high-power graphite particles with particle sizes of 5-3 mm, 3-1 mm, and 1-0 mm are mixed at a mass ratio of 1:3.0-3.5:2.0-2.5, and the carbon content is ≥98%.

3. The environmentally friendly high thermal conductivity carbon ramming mass according to claim 1, characterized in that, The particle size of the high-power graphite powder is ≤0.074 mm, and the carbon content is ≥98%.

4. The environmentally friendly high thermal conductivity carbon ramming mass according to claim 1, characterized in that, The particle size of the spherical graphite is ≤0.074 mm, and the carbon content is ≥99%.

5. The environmentally friendly high thermal conductivity carbon ramming mixture according to claim 1, characterized in that, The copper content in the copper powder is ≥99%.

6. The environmentally friendly high thermal conductivity carbon ramming mass according to claim 1, characterized in that, The particle size of the conductive carbon black is ≤0.074 mm, and the carbon content is ≥98%.

7. The environmentally friendly high thermal conductivity carbon ramming mixture according to claim 1, characterized in that, The dimethicone is liquid, has a viscosity of 100-150 mm 2 / s, and a density of 0.96-0.97 g / cm 3 .

8. A method for preparing the environmentally friendly high thermal conductivity carbon ramming mixture according to any one of claims 1-7, characterized in that, Specifically, the following steps are included: The high-power graphite particles, the spherical graphite, and the high-power graphite powder are mixed to obtain a mixture; the copper powder and the conductive carbon black are uniformly mixed in the dimethyl silicone oil, and then added into the mixture and milled, thereby obtaining the environmentally friendly high-thermal-conductivity carbon ramming material.

9. The production method according to claim 8, characterized by, Mixing is performed for 3-5 minutes to obtain the mixture, and milling is performed for 10-15 minutes.