CN111705172A - Graphite recarburizing agent and preparation method thereof - Google Patents
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/02—General features in the manufacture of pig-iron by applying additives, e.g. fluxing agents
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- 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
- C04B35/515—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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- 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
- C04B35/528—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
- C04B35/532—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 containing a carbonisable binder
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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
- C04B35/622—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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
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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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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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
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
Abstract
The invention discloses a graphite recarburizing agent which comprises the following specific components in parts by weight: 300 parts of fixed carbon 280 plus materials, 85-95 parts of crystalline flake graphite, 60-84 parts of microcrystalline graphite, 75-93 parts of artificial graphite, 75-87 parts of dry coke, 50-60 parts of anthracite, 12-15 parts of ash powder, 12-15 parts of volatile powder, 20-50 parts of sulfur, 17-30 parts of water and 16-22 parts of binder. The invention can effectively mix carbon elements in different substances through a plurality of steps, simultaneously reduce the content of sulfur, effectively improve the content of carbon in the product, and simultaneously realize uniform treatment on the size and the shape of the product.
Description
Technical Field
The invention relates to the technical field of graphite carburant, in particular to a graphite carburant and a preparation method thereof.
Background
The carburant has various raw materials and different production processes, and comprises wood carbon, coal carbon, coke and graphite, wherein various types of carburant have various small types. The high-quality carburant generally refers to a graphitized carburant, and the arrangement of carbon atoms is in a graphite microscopic form under a high-temperature condition, so that the high-quality carburant is called graphitization;
the carbon content of the carburant on the existing market is low, so that the carbon content of the carburant cannot be well improved and the sulfur content cannot be reduced in the iron-making process.
Disclosure of Invention
The invention aims to solve the defects that the carbon content of a carburant cannot be well improved and the sulfur content cannot be well reduced in the prior art, and provides a graphite carburant and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
designing a graphite recarburizing agent, which comprises the following specific components in percentage by weight: 300 parts of fixed carbon 280 plus materials, 85-95 parts of crystalline flake graphite, 60-84 parts of microcrystalline graphite, 75-93 parts of artificial graphite, 75-87 parts of dry coke, 50-60 parts of anthracite, 12-15 parts of ash powder, 12-15 parts of volatile powder, 20-50 parts of sulfur, 17-30 parts of water and 16-22 parts of binder.
Preferably, the amounts of the fixed carbon, flake graphite, artificial graphite, dry coke and anthracite are most preferably 285-290 parts, 88-93 parts, 70-80 parts, 81-90 parts, 79-83 parts, 55-59 parts, 13-14 parts, 21-24 parts, 22-28 parts and 17-21 parts, respectively.
The invention also provides a preparation method of the graphite recarburizing agent, which comprises the following steps:
s1, pre-crushing of raw materials: pouring all the fixed carbon, the flake graphite, the microcrystalline graphite, the artificial graphite, the dry coke and the anthracite into a double-geared roller crusher to realize crushing, and controlling the crushing time to be 30-40 minutes when the raw materials completely enter the crusher;
s2, after the step S1 is completed, the crushed raw materials are placed into a storage hopper to be transported, the raw materials in the storage hopper are poured into a pot-type calcining furnace, the temperature is increased to 2400-2600 ℃, the discharging is realized after the heating control is carried out for 2-4 hours, and the melting and the dehydration are realized;
s3, after the step S2 is completed, injecting the condensed raw materials into a double-roll crusher to realize crushing, injecting the crushed raw materials into a vibrating screen to realize screening, injecting the raw materials left in the vibrating screen into the double-roll crusher again to realize crushing, injecting the raw materials passing through the vibrating screen into a ball mill to realize ball milling treatment, and controlling the time to be 10-20 minutes;
s4, placing the raw materials collected in the step S3 into a storage hopper, placing a batching vehicle at the lower end of the storage hopper, conveying the raw materials into a kneading pot through the batching vehicle, adding ash powder, volatile powder, sulfur, water and a binder into the kneading pot at one time, raising the temperature inside the kneading pot to 400 ℃ of 200 plus materials, and controlling the stirring time to be 44-56 minutes;
s5, after the step S4 is completed, the raw materials in the kneading pot are cooled and then transferred to a forming machine to realize extrusion or die pressing, and the raw materials are extruded and formed into a certain shape and size;
s6, after the extrusion forming in the S5 step is realized, roasting the raw materials is realized;
and S7, after the step S6 is completed, graphitizing the product.
Preferably, the binder is specifically asphalt and spongy raw petroleum coke, and the weight ratio of the asphalt to the spongy raw petroleum coke is 1: 1.
Preferably, the step S6 of firing is to load the raw materials into a firing furnace, heat the raw materials for 5-8 hours at 2700-.
Preferably, the graphitization treatment of the raw material is realized after the step S6 is completed, specifically, the raw material is placed into a resistance furnace, the temperature is controlled at 2100 ℃ to 2400 ℃, the heat is preserved for 2 to 3 hours, and the cooling treatment is realized after the processing is completed.
Preferably, after the processing is finished, the raw materials are flattened and exposed to the air, so that the natural cooling treatment is realized.
Preferably, after the step S7 is completed, the cooled product is placed on a machine tool to realize the shape processing of the product, so as to achieve more precise dimension.
The graphite recarburizing agent and the preparation method thereof provided by the invention have the beneficial effects that: the graphite recarburizer and the preparation method thereof can effectively mix carbon elements in different substances through multiple steps, reduce the content of sulfur, effectively improve the content of carbon in the product, and simultaneously realize uniform treatment on the size and the shape of the product.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
The graphite recarburizing agent comprises the following specific components in percentage by weight: 280 parts of fixed carbon, 85 parts of flake graphite, 60 parts of microcrystalline graphite, 75 parts of artificial graphite, 75 parts of dry coke, 50 parts of anthracite, 12 parts of ash powder, 12 parts of volatile powder, 20 parts of sulfur, 17 parts of water and 16 parts of binder, wherein the binder is specifically asphalt and spongy raw petroleum coke, and the weight ratio of the asphalt to the spongy raw petroleum coke is 1: 1;
the invention also provides a preparation method of the graphite recarburizing agent, which comprises the following steps:
s1, pre-crushing of raw materials: pouring all the fixed carbon, the flake graphite, the microcrystalline graphite, the artificial graphite, the dry coke and the anthracite into a double-geared roller crusher to realize crushing, and controlling the crushing time to be 30 minutes when the raw materials completely enter the crusher;
s2, after the step S1 is completed, the crushed raw materials are placed into a storage hopper to be transported, the raw materials in the storage hopper are poured into a pot-type calcining furnace, the temperature is increased to 2400 ℃, the discharging is realized after the heating control is carried out for 2 hours, and the melting and the dehydration are realized;
s3, after the step S2 is completed, injecting the condensed raw materials into a double-roll crusher to realize crushing, injecting the crushed raw materials into a vibrating screen to realize screening, injecting the raw materials left in the vibrating screen into the double-roll crusher again to realize crushing, injecting the raw materials passing through the vibrating screen into a ball mill to realize ball milling treatment, and controlling the time to be 10 minutes;
s4, placing the raw materials collected in the step S3 into a storage hopper, placing a batching vehicle at the lower end of the storage hopper, conveying the raw materials into a kneading pot through the batching vehicle, adding ash powder, volatile powder, sulfur, water and a binder into the kneading pot at one time, raising the temperature inside the kneading pot to 200 ℃, and controlling the stirring time to be 44 minutes;
s5, after the step S4 is completed, the raw materials in the kneading pot are cooled and then transferred to a forming machine to realize extrusion or die pressing, and the raw materials are extruded and formed into a certain shape and size;
s6, after the extrusion forming in the step S5 is realized, roasting is realized on the raw materials, specifically, the raw materials are put into a roasting furnace and are heated for 5 hours, the time is controlled at 2700 ℃, and after roasting, the raw materials with fixed sizes are connected into a whole, so that the mechanical strength and the electric and heat conducting performance of the material are improved;
s7, after the step S6 is completed, graphitization treatment is carried out on the product, graphitization treatment on the raw material is achieved, specifically, the raw material is placed into a resistance furnace, the temperature is controlled to be 2100 ℃, heat preservation is carried out for 2 hours, cooling treatment is achieved after processing is completed, the raw material is flattened and exposed in air, natural cooling treatment is achieved, after the step S7 is completed, the cooled product is placed on a machine tool to achieve appearance processing of the product, and the size is achieved more accurately.
Example 2
The graphite recarburizing agent comprises the following specific components in percentage by weight: 290 parts of fixed carbon, 90 parts of crystalline flake graphite, 69 parts of microcrystalline graphite, 80 parts of artificial graphite, 79 parts of dry coke, 55 parts of anthracite, 14 parts of ash powder, 13 parts of volatile powder, 40 parts of sulfur, 20 parts of water and 19 parts of binder, wherein the binder is specifically asphalt and spongy raw petroleum coke, and the weight ratio of the asphalt to the spongy raw petroleum coke is 1: 1;
the invention also provides a preparation method of the graphite recarburizing agent, which comprises the following steps:
s1, pre-crushing of raw materials: pouring all the fixed carbon, the flake graphite, the microcrystalline graphite, the artificial graphite, the dry coke and the anthracite into a double-geared roller crusher to realize crushing, and controlling the crushing time to be 35 minutes when the raw materials completely enter the crusher;
s2, after the step S1 is completed, the crushed raw materials are placed into a storage hopper to be transported, the raw materials in the storage hopper are poured into a pot type calcining furnace, the temperature is increased to 2500 ℃, the materials are discharged after being heated and controlled for 3 hours, and melting and dehydration are achieved;
s3, after the step S2 is completed, injecting the condensed raw materials into a double-roll crusher to realize crushing, injecting the crushed raw materials into a vibrating screen to realize screening, injecting the raw materials left in the vibrating screen into the double-roll crusher again to realize crushing, injecting the raw materials passing through the vibrating screen into a ball mill to realize ball milling treatment, and controlling the time to be 15 minutes;
s4, placing the raw materials collected in the step S3 into a storage hopper, placing a batching vehicle at the lower end of the storage hopper, conveying the raw materials into a kneading pot through the batching vehicle, adding ash powder, volatile powder, sulfur, water and a binder into the kneading pot at one time, raising the temperature inside the kneading pot to 300 ℃, and controlling the stirring time to be 49 minutes;
s5, after the step S4 is completed, the raw materials in the kneading pot are cooled and then transferred to a forming machine to realize extrusion or die pressing, and the raw materials are extruded and formed into a certain shape and size;
s6, after the extrusion forming in the step S5 is realized, roasting the raw materials is realized, wherein the roasting is specifically that the raw materials are put into a roasting furnace and are heated for 6 hours, the time is controlled at 2800 ℃, and after roasting, the raw materials with fixed sizes are connected into a whole, so that the mechanical strength and the electric and heat conduction performance of the material are improved;
s7, after the step S6 is completed, graphitization treatment is carried out on the product, graphitization treatment of the raw material is achieved, specifically, the raw material is placed into a resistance furnace, the temperature is controlled to be 2300 ℃, heat preservation is carried out for 2.5 hours, cooling treatment is achieved after processing is completed, the raw material is flattened and exposed in air, natural cooling treatment is achieved, after the step S7 is completed, the cooled product is placed on a machine tool to achieve appearance processing of the product, and size accuracy is achieved.
Example 3
The graphite recarburizing agent comprises the following specific components in percentage by weight: 300 parts of fixed carbon, 95 parts of flake graphite, 84 parts of microcrystalline graphite, 93 parts of artificial graphite, 87 parts of dry coke, 60 parts of anthracite, 15 parts of ash powder, 15 parts of volatile powder, 50 parts of sulfur, 30 parts of water and 22 parts of binder, wherein the binder is specifically asphalt and spongy raw petroleum coke, and the weight ratio of the asphalt to the spongy raw petroleum coke is 1: 1;
the invention also provides a preparation method of the graphite recarburizing agent, which comprises the following steps:
s1, pre-crushing of raw materials: pouring all the fixed carbon, the flake graphite, the microcrystalline graphite, the artificial graphite, the dry coke and the anthracite into a double-geared roller crusher to realize crushing, and controlling the crushing time to be 40 minutes when the raw materials completely enter the crusher;
s2, after the step S1 is completed, the crushed raw materials are placed in a storage hopper to be transported, the raw materials in the storage hopper are poured into a pot type calcining furnace, the temperature is increased to 2600 ℃, the discharging is realized after the heating control is carried out for 4 hours, and the melting and the dehydration are realized;
s3, after the step S2 is completed, injecting the condensed raw materials into a double-roll crusher to realize crushing, injecting the crushed raw materials into a vibrating screen to realize screening, injecting the raw materials left in the vibrating screen into the double-roll crusher again to realize crushing, injecting the raw materials passing through the vibrating screen into a ball mill to realize ball milling treatment, and controlling the time to be 20 minutes;
s4, placing the raw materials collected in the step S3 into a storage hopper, placing a batching vehicle at the lower end of the storage hopper, conveying the raw materials into a kneading pot through the batching vehicle, adding ash powder, volatile powder, sulfur, water and a binder into the kneading pot at one time, raising the temperature inside the kneading pot to 400 ℃, and controlling the stirring time to be 56 minutes;
s5, after the step S4 is completed, the raw materials in the kneading pot are cooled and then transferred to a forming machine to realize extrusion or die pressing, and the raw materials are extruded and formed into a certain shape and size;
s6, after the extrusion forming in the S5 step is realized, roasting is realized on the raw materials, specifically, the raw materials are put into a roasting furnace and are heated for 8 hours, the time is controlled at 2900 ℃, and after roasting, the raw materials with fixed sizes are connected into a whole, so that the mechanical strength and the electric and heat conducting performance of the material are improved;
s7, after the step S6 is completed, graphitization treatment is carried out on the product, graphitization treatment on the raw material is achieved, specifically, the raw material is placed into a resistance furnace, the temperature is controlled to be 2400 ℃, heat preservation is carried out for 3 hours, cooling treatment is achieved after processing is completed, the raw material is flattened and exposed in air, natural cooling treatment is achieved, after the step S7 is completed, the cooled product is placed on a machine tool to achieve appearance processing of the product, and the size is achieved more accurately.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solution of the present invention and the inventive concept thereof, which are equivalent to or changed by the present invention, within the technical scope of the present invention.
Claims (8)
1. The graphite recarburizing agent is characterized by comprising the following specific components in percentage by weight: 300 parts of fixed carbon 280 plus materials, 85-95 parts of crystalline flake graphite, 60-84 parts of microcrystalline graphite, 75-93 parts of artificial graphite, 75-87 parts of dry coke, 50-60 parts of anthracite, 12-15 parts of ash powder, 12-15 parts of volatile powder, 20-50 parts of sulfur, 17-30 parts of water and 16-22 parts of binder.
2. The graphite recarburizing agent as defined in claim 1, wherein the amounts of the fixed carbon, flake graphite, artificial graphite, dry coke and anthracite are most preferably 285-290 parts, 88-93 parts, 70-80 parts, 81-90 parts, 79-83 parts, 55-59 parts, 13-14 parts, 21-24 parts, 22-28 parts and 17-21 parts, respectively.
3. A method for preparing the graphite recarburizer according to claims 1 to 2, characterized by comprising the steps of:
s1, pre-crushing of raw materials: pouring all the fixed carbon, the flake graphite, the microcrystalline graphite, the artificial graphite, the dry coke and the anthracite into a double-geared roller crusher to realize crushing, and controlling the crushing time to be 30-40 minutes when the raw materials completely enter the crusher;
s2, after the step S1 is completed, the crushed raw materials are placed into a storage hopper to be transported, the raw materials in the storage hopper are poured into a pot-type calcining furnace, the temperature is increased to 2400-2600 ℃, the discharging is realized after the heating control is carried out for 2-4 hours, and the melting and the dehydration are realized;
s3, after the step S2 is completed, injecting the condensed raw materials into a double-roll crusher to realize crushing, injecting the crushed raw materials into a vibrating screen to realize screening, injecting the raw materials left in the vibrating screen into the double-roll crusher again to realize crushing, injecting the raw materials passing through the vibrating screen into a ball mill to realize ball milling treatment, and controlling the time to be 10-20 minutes;
s4, placing the raw materials collected in the step S3 into a storage hopper, placing a batching vehicle at the lower end of the storage hopper, conveying the raw materials into a kneading pot through the batching vehicle, adding ash powder, volatile powder, sulfur, water and a binder into the kneading pot at one time, raising the temperature inside the kneading pot to 400 ℃ of 200 plus materials, and controlling the stirring time to be 44-56 minutes;
s5, after the step S4 is completed, the raw materials in the kneading pot are cooled and then transferred to a forming machine to realize extrusion or die pressing, and the raw materials are extruded and formed into a certain shape and size;
s6, after the extrusion forming in the S5 step is realized, roasting the raw materials is realized;
and S7, after the step S6 is completed, graphitizing the product.
4. The method for preparing the graphite recarburizer according to claim 3, wherein the binder is asphalt and spongy raw petroleum coke, and the weight ratio of the asphalt to the spongy raw petroleum coke is 1: 1.
5. The method as claimed in claim 3, wherein the step S6, the step S and the step S are carried out by loading the raw materials into a roasting furnace, heating for 5-8 hours, controlling the temperature at 2700-2900 ℃, and after roasting, connecting the raw materials with fixed sizes into a whole to improve the mechanical strength and the electrical and thermal conductivity of the materials.
6. The method as claimed in claim 3, wherein the graphitization treatment of the raw material is performed after the step S6 is completed, specifically, the raw material is placed in a resistance furnace, the temperature is controlled at 2100 ℃ and 2400 ℃, the heat is preserved for 2-3 hours, and the cooling treatment is performed after the processing is completed.
7. The method for preparing the graphite recarburizer according to claim 6, wherein the raw material is flattened and exposed to air after the processing is completed, thereby achieving natural cooling.
8. The method of claim 6, wherein after the step of S7 is completed, the cooled product is placed on a machine tool to achieve a more precise shape and size of the product.
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Application publication date: 20200925 |