CN114478034A - Environment-friendly high-thermal-conductivity carbon ramming material for blast furnace and preparation method thereof - Google Patents
Environment-friendly high-thermal-conductivity carbon ramming material for blast furnace and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/522—Graphite
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- C—CHEMISTRY; METALLURGY
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
Abstract
The invention discloses an environment-friendly high-thermal-conductivity carbon ramming mass for a blast furnace and a preparation method thereof, and relates to the field of carbon ramming masses for blast furnaces, wherein the carbon ramming mass comprises the following raw materials in parts by weight: 70-80 parts of artificial graphite, 4-15 parts of natural crystalline flake graphite and 10-18 parts of superfine crystalline flake graphite; and additionally adding 1-4 parts of carboxymethyl cellulose, 5-12 parts of polysaccharide and 10-20 parts of water as a binding agent. According to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 5-8 minutes, then adding water, and mixing for 15-30 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace. The invention adopts carboxymethyl cellulose, polysaccharide and water as a combined system, and is safe and environment-friendly; in addition, graphite is completely used as a raw material, and the prepared product has high heat conductivity coefficient.
Description
Technical Field
The invention relates to a carbon ramming material for a blast furnace, in particular to an environment-friendly high-heat-conductivity carbon ramming material for the blast furnace and a preparation method thereof.
Background
The carbon ramming mass for the blast furnace is mainly used for filling gaps between a hearth carbon brick and a cooling wall and between a furnace bottom carbon brick and a sealing plate, and can prevent molten iron, slag and coal gas from leaking; more importantly, the carbon ramming material for the blast furnace has the function of transferring the heat of the carbon bricks. If the heat conductivity coefficient of the carbon ramming material for the blast furnace is too low, the heat transfer of the carbon bricks can be influenced, the temperature of the carbon bricks is increased, and the erosion speed of the carbon bricks is accelerated. Therefore, the carbon ramming mass for the blast furnace is required to have good heat conductivity coefficient besides ensuring certain strength and compactness.
The traditional carbon ramming material for blast furnaces is prepared by mixing electric calcined coal and petroleum coke serving as main raw materials and asphalt, tar or phenolic resin serving as a binding agent. The thermal conductivity of the carbon ramming material is usually low because the self thermal conductivity of the electrically calcined coal and the petroleum coke is low; in addition, asphalt, tar and phenolic resin all have pungent odor, and the asphalt and tar can volatilize poisonous yellow smoke gas when being baked, so that the traditional carbon ramming mass for blast furnaces faces severe environmental protection problems.
The patent technologies of ' a ramming material for a gap between the bottom of a blast furnace hearth ' (CN 101823891B) ' a high-heat-conductivity carbon ramming material and a preparation method thereof ' (CN 103387401A) ' and the like, improve the heat conductivity of the carbon ramming material for the blast furnace by adding a large amount of crystalline flake graphite with high heat conductivity coefficient, but the layered structure of the crystalline flake graphite endows the crystalline flake graphite with greater elasticity and aftereffect, and the adding of the crystalline flake graphite in a large amount can influence the ramming density of the carbon ramming material; in addition, the binding agent adopts phenolic resin, so that the environmental protection problem cannot be solved. As another example, the high thermal conductivity carbon ramming material for large blast furnaces (CN 102041334B) adopts the addition of high thermal conductivity crystalline flake graphite and copper powder to improve the thermal conductivity, and adopts tar, resin and tung oil as a composite binder, which not only has a complex process but also has a high preparation cost; but also still face environmental problems.
Disclosure of Invention
The invention aims to provide a preparation method of an environment-friendly high-thermal-conductivity carbon ramming mass for a blast furnace, which has the characteristics of low cost and simple process, and the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace prepared by the method has the characteristics of safety, environment friendliness and high thermal conductivity coefficient.
In order to achieve the purpose, the invention provides the following technical scheme:
the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace and the preparation method thereof comprise the following raw materials in parts by weight: 70-80 parts of artificial graphite, 4-15 parts of natural crystalline flake graphite and 10-18 parts of superfine crystalline flake graphite; the following components are added to account for the total mass percentage of the raw materials: 1-4 parts of carboxymethyl cellulose, 5-12 parts of polysaccharide and 10-20 parts of water are used as a binding agent.
Preferably: the particle diameter of the artificial graphite comprises the following parts by weight: 10-30 parts of particles with the particle size of 4-2 mm, 40-50 parts of particles with the particle size of 2-0.15 mm and 20-40 parts of particles with the particle size of 0.15-0.074 mm.
Preferably: the granularity of the superfine crystalline flake graphite is less than 0.015 mm.
Preferably: the preparation method comprises the following steps: according to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 5-8 minutes, then adding water, and mixing for 15-30 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace.
Preferably: the granularity of the natural crystalline flake graphite is less than 0.074 mm.
Preferably: the particle size of the polysaccharide is less than 0.15mm, and the polysaccharide is one of starch, pullulan, xanthan gum and sodium alginate.
Preferably: the environment-friendly high thermal conductivity carbon ramming mass for the blast furnace is prepared by the preparation method of the environment-friendly high thermal conductivity carbon ramming mass for the blast furnace according to claim 5.
Due to the adoption of the technical scheme, the invention has the following advantages:
due to the adoption of the technical scheme, compared with the prior art, the invention has the following positive effects: the combined system adopted by the invention is organic polysaccharide, so that the price is low, and the combined material is non-toxic, pollution-free, safe and environment-friendly, and fundamentally solves the environmental protection problem of the traditional carbon ramming mass; the solvent adopted by the invention is water with rich resources, is convenient and easy to obtain, and has simple preparation process; the carboxymethyl cellulose is added to absorb moisture and preserve moisture, so that the storage life of the carbon ramming material is prolonged.
The invention adopts the whole graphite formula process of using artificial graphite as the aggregate and crystalline flake graphite as the filling substrate to prepare the carbon ramming mass for the blast furnace, thereby ensuring the excellent heat-conducting property of the carbon ramming mass; the added superfine crystalline flake graphite can effectively fill gaps among artificial graphite particles, so that the carbon ramming material is more compact in ramming construction, thereby more effectively transferring the heat of carbon bricks and prolonging the service life of a blast furnace.
Through detection, the heat conductivity coefficient of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace, which is prepared by the invention, dried at the low temperature of 110 ℃ reaches 18-30W ∙ m-1∙K-1。
Therefore, the invention has low production cost and simple process; the prepared environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace has the characteristics of safety, environment friendliness and high thermal conductivity coefficient.
The preparation method of the invention improves the bonding degree of the carbon ramming mass, so that the carbon ramming mass is not easy to break and the toughness of the carbon ramming mass is improved.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention.
Example 1
An environment-friendly high-thermal-conductivity carbon ramming mass for a blast furnace and a preparation method thereof are disclosed in the embodiment, and the preparation method comprises the following steps:
the raw materials comprise the following components in parts by weight: 72 parts of artificial graphite, 1 part of natural crystalline flake graphite and 17 parts of superfine crystalline flake graphite; adding 1 part of carboxymethyl cellulose, 7 parts of polysaccharide and 18 parts of water as a binding agent;
the preparation method of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace comprises the following steps: according to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 5 minutes, then adding water, and mixing for 15 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace.
The polysaccharide is starch
Through detection, the heat conductivity coefficient of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace, which is prepared by the invention, dried at the low temperature of 110 ℃ reaches 18W ∙ m-1∙K-1。
Example 2
An environment-friendly high-thermal-conductivity carbon ramming mass for a blast furnace and a preparation method thereof are disclosed in the embodiment, and the preparation method comprises the following steps:
the raw materials comprise the following components in parts by weight: 75 parts of artificial graphite, 15 parts of natural crystalline flake graphite and 12 parts of superfine crystalline flake graphite; adding 4 parts of carboxymethyl cellulose, 11 parts of polysaccharide and 18 parts of water as a binding agent;
the preparation method of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace comprises the following steps: according to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 8 minutes, then adding water, and mixing for 30 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace.
The polysaccharide is pullulan polysaccharide
Through detection, the heat conductivity coefficient of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace, which is prepared by the invention, dried at the low temperature of 110 ℃ reaches 24W ∙ m-1∙K-1。
Example 3
An environment-friendly high-thermal-conductivity carbon ramming mass for a blast furnace and a preparation method thereof are disclosed in the embodiment, and the preparation method comprises the following steps:
the raw materials comprise the following components in parts by weight: 77 parts of artificial graphite, 9 parts of natural crystalline flake graphite and 14 parts of superfine crystalline flake graphite; adding 4 parts of carboxymethyl cellulose, 12 parts of polysaccharide and 16 parts of water as a binding agent;
the preparation method of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace comprises the following steps: according to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 6.5 minutes, then adding water, and mixing for 17.5 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace.
The polysaccharide is xanthan gum.
Through detection, the heat conductivity coefficient of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace, which is prepared by the invention, dried at the low temperature of 110 ℃ reaches 25W ∙ m-1∙K-1。
Example 4
An environment-friendly high-thermal-conductivity carbon ramming mass for a blast furnace and a preparation method thereof are disclosed in the embodiment, and the preparation method comprises the following steps:
the raw materials comprise the following components in parts by weight: 79 parts of artificial graphite, 6 parts of natural crystalline flake graphite and 15 parts of superfine crystalline flake graphite; adding 2 parts of carboxymethyl cellulose, 7 parts of polysaccharide and 14 parts of water as a binding agent;
the preparation method of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace comprises the following steps: according to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 7 minutes, then adding water, and mixing for 18 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace.
The polysaccharide is sodium alginate
Through detection, the heat conductivity coefficient of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace, which is prepared by the invention, dried at the low temperature of 110 ℃ reaches 29W ∙ m-1∙K-1。
Compared with the prior art, the specific implementation mode has the following positive effects:
the combined system adopted by the invention is organic polysaccharide, so that the price is low, and the combined material is non-toxic, pollution-free, safe and environment-friendly, and fundamentally solves the environmental protection problem of the traditional carbon ramming mass; the solvent adopted by the invention is water with rich resources, is convenient and easy to obtain, and has simple preparation process; the carboxymethyl cellulose is added to absorb moisture and preserve moisture, so that the storage life of the carbon ramming material is prolonged.
The invention adopts the whole graphite formula process of using artificial graphite as the aggregate and crystalline flake graphite as the filling substrate to prepare the carbon ramming mass for the blast furnace, thereby ensuring the excellent heat-conducting property of the carbon ramming mass; the superfine flake graphite is added, so that gaps among artificial graphite particles can be effectively filled, and the carbon ramming material is more compact in ramming construction, thereby more effectively transferring the heat of carbon bricks and prolonging the service life of a blast furnace.
Through detection, the heat conductivity coefficient of the environment-friendly high-heat-conductivity carbon ramming mass for the blast furnace, which is prepared by the invention, dried at the low temperature of 110 ℃ reaches 30W ∙ m-1∙K-1。
Therefore, the invention has low production cost and simple process; the prepared environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace has the characteristics of safety, environment friendliness and high thermal conductivity coefficient.
Claims (6)
1. The environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace is characterized by comprising the following raw materials in parts by weight: 70-80 parts of artificial graphite, 4-15 parts of natural crystalline flake graphite and 10-18 parts of superfine crystalline flake graphite; and additionally adding 1-4 parts of carboxymethyl cellulose, 5-12 parts of polysaccharide and 10-20 parts of water as a binding agent.
2. The environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace as claimed in claim 1, wherein the particle diameter of the artificial graphite comprises the following parts by weight: 10 to 30 parts of particles with a particle size of 4 to 2mm, 40 to 50 parts of particles with a particle size of 2 to 0.15mm, and 20 to 40 parts of particles with a particle size of 0.15 to 0.074 mm.
3. The environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace as claimed in claim 1, wherein the particle size of the ultrafine flake graphite is less than 0.015 mm.
4. The preparation method of the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace according to claim 1, wherein the preparation method comprises the following steps: according to the parts by weight of the raw materials and the binding agent, firstly, mixing the artificial graphite, the natural crystalline flake graphite, the carboxymethyl cellulose and the polysaccharide for 5-8 minutes, then adding water, and mixing for 15-30 minutes to prepare the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace.
5. The method for preparing the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace according to claim 4, wherein the particle size of the natural crystalline flake graphite is less than 0.074 mm.
6. The preparation method of the environment-friendly high-thermal-conductivity carbon ramming mass for the blast furnace as claimed in claim 5, wherein the particle size of the polysaccharide is less than 0.15mm, and the polysaccharide is one of starch, pullulan, xanthan gum and sodium alginate.
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