CN105025602A - Carbon nanometer ultramicro material large carbon electrode and preparation method thereof - Google Patents
Carbon nanometer ultramicro material large carbon electrode and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of carbon electrodes, and discloses a carbon nanometer ultramicro material large carbon electrode and a preparation method thereof. The main technical characteristics are that screening, ultramicro nanoscale powder grinding and proportioning are performed through a vibrating screen, high-performance powder grinding equipment and an electronic proportioning system respectively, calcined solid raw materials including electrically calcined anthracite, petroleum coke and graphite scraps enter a double-speed efficient energy-saving kneading pot while a processed additive (carbonate) is added, and after stirring and dry mixing are performed, coal pitch is added. Since the ultramicro carbon nanoscale powder can enable aggregate and coke particles to be completely combined, thereby improving performance of the electrode, perfecting internal structure of the electrode, ensuring safe use performance of the carbon electrode, and achieving the purposes of reducing electrical resistivity of the electrode, improving oxidation resistance, breaking resistance and anti-tensile performance, prolonging the use cycle life of the electrode and reducing production cost of a submerged arc furnace.
Description
Technical field
The invention belongs to special carbonaceous electrode technology field, particularly relate to carbon nanometer superfine material large gauge carbon resistance rod and preparation method thereof.
Background technology
Large diameter carbonaceous electrode is put into the energy saving environmental protection product of national Ministry of Industry and Information " industrial repositioning upgrading guide to investment " encourage growth; be applied in the burried arc furnace smelting industries such as industrial silicon, yellow phosphorus, calcium carbide, ferroalloy; and substitute fast energy consumption and the higher graphite electrode of price and with serious pollution electrode paste; on the burried arc furnace of same capacity; large diameter carbonaceous electrode is larger than graphite electrode diameter; stove inner arc band is broadening; arc body is stablized; ensure that efficiency; reduce and can consume, protect environment.
Along with national energy-saving reduces discharging actively pushing forward of policy, National Development and Reform Committee, Ministry of Industry and Information have put into effect a series of burried arc furnace smelting industry access policy, and electric furnace type of furnace specification strengthens gradually, proposes new requirement to burried arc furnace major diameter carbonaceous electrode.At present, there is internal structure difference in China's large diameter carbonaceous electrode, resistivity is high, non-oxidizability ability is poor, consume the shortcomings such as high, also there is a certain distance compared with international top grade large diameter carbonaceous electrode quality.In order to promote large diameter carbonaceous electrode product quality, adapt to domestic and international market demand, by further investigation material property, change material mixture ratio, increase the content that graphite is broken, adjustment material particle size, in formula, particularly add the modes such as additive (carbonate) and carbon nanoscale powder material, improve its performance, reach and increase carbonaceous electrode diameter, make the antioxygenic property of carbon resistance rod, the anti-performance that fractures, stretch-proof performance is all significantly improved, ensure that the safe application performance of carbon resistance rod, reduce carbonaceous consumption of electrode, increase the service life, reduce the object of burried arc furnace smelting cost.
Summary of the invention
The first problem that the present invention will solve just be to provide a kind of high serviceability, low-resistivity, non-oxidizability strong, consume low carbon nanometer superfine material large gauge carbon resistance rod.
For solving above-mentioned first problem, the carbon nanometer superfine material large gauge carbon resistance rod that the present invention proposes comprises the component of following weight portion:
Particle diameter is greater than broken 8-16 weight portions of graphite that 8mm is less than or equal to 16mm
Particle diameter is greater than broken 16-20 weight portions of graphite that 4mm is less than or equal to 8mm
Particle diameter is less than or equal to broken 12-18 weight portions of graphite of 4mm
Particle diameter is greater than petroleum coke 8-16 weight portion that 8mm is less than or equal to 16mm
Particle diameter is greater than petroleum coke 12-20 weight portion that 4mm is less than or equal to 8mm
Particle diameter is less than or equal to petroleum coke 10-14 weight portion of 4mm
Electric calcined anthracite 4-12 weight portion
Coal tar pitch 18-23 weight portion
Carbon nanoscale powder material 16-28 weight portion
Its additional technical feature is the component also comprising following weight portion:
Raw broken 5-10 weight portions
Broken 4-10 weight portions of roasting
Active additive (carbonate) 0.3-1.2 weight portion
The Second Problem that the present invention will solve just is to provide the preparation method of carbon nanometer superfine material large gauge carbon resistance rod.
For solving above-mentioned Second Problem, the preparation method of carbon nanometer superfine material large gauge carbon resistance rod of the present invention comprises the following steps:
The first step: in broken, screening, abrasive dust
By the solid material electric calcined anthracite crushing and screening after forging, by petroleum coke, the broken a part of crushing and screening of graphite, a part carries out ultra micro carbon nanoscale powder material abrasive dust with high-effect milling equipment;
Second step: batching
Weigh up 8-16 weight portion particle diameters by component electronics feed proportioning system described in claim 1 to be greater than 8mm to be less than or equal to 16mm graphite broken, 16-20 weight portion particle diameters are greater than 4mm, and to be less than or equal to the graphite of 8mm broken, the graphite that 12-18 weight portion particle diameters are less than or equal to 4mm is broken, 8-16 weight portion particle diameters are greater than the petroleum coke that 8mm is less than or equal to 16mm, 12-20 weight portion particle diameters are greater than the petroleum coke that 4mm is less than or equal to 8mm, 10-14 weight portion particle diameters are less than or equal to the petroleum coke of 4mm, 3-12 weight portion electric calcined anthracites, 16-28 weight portion carbon nanoscale powder materials, 5-10 weight portions are raw broken, 4-10 weight portion roastings are broken, the energy-efficient kneading pot of double speed is entered after batching, the active additive (carbonate) of treated 0.3-1.2 weight portions is added kneading pot simultaneously,
3rd step: dry blend wet mixing
The material of the energy-efficient kneading pot of double speed will be joined, stir, be dry mixed 30-50 minutes, be heated to 160 DEG C-180 DEG C, after be 170 DEG C-185 DEG C by temperature, 18-23 weight portion coal tar pitch inject the energy-efficient kneading pot of double speed, continue to stir, kneading is after 30-35 minutes, and temperature rises to 165 DEG C of-175 DEG C of thickeners and takes the dish out of the pot;
4th step: shaping
The thickener that takes the dish out of the pot enters the horizontal electrode samming pot without pelletizing feed, making thickener temperature be down to 135 DEG C-140 DEG C enters in the mould that vertical vibrating vacuumizes on forming machine, patrix presses down after the rear 8-10 that slightly shakes in advance lifts parting line venting second and vacuumizes lasting 4-6 minute again, vacuum degree-0.07MPa to-0.09MPa, after vibrating 8-10 minutes again, leave standstill pressurize after 30-40 minutes by electrode demoulding spraying cooling, and in cooling bay water-cooled 3-4 hours, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified raw product;
5th step: roasting
Carbon nanometer superfine material large gauge carbon resistance rod raw product is transported to calcination department.First shove charge, green compact adopt vertical vertical dress, the distance 100mm between green compact-120mm, green compact and kiln wall distance 150mm-250mm, the metallurgical coke of green compact lower end paving 150mm-250mm thickness, green compact upper end covers the metallurgical coke of 400mm-600mm thickness.Then temperature control is carried out, temperature from ambient is progressively risen to 1150 DEG C, major diameter carbonaceous electrode manufactured goods are discharged through room temperature-230 DEG C low-temperature prewarming, 230 DEG C of-400 DEG C of fugitive constituents, 400 DEG C of-550 DEG C of semicokes are shaping, after 550 DEG C of-700 DEG C of high-temperature-coked, 700 DEG C of-1150 DEG C of perfect performance four-stages, cease fire and be incubated, naturally cool, treat that temperature is down to less than 300 DEG C and is come out of the stove, after being cooled to room temperature, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified roasting product;
6th step: machine work
The carbon nanometer superfine material large gauge carbon resistance rod roasting product be up to the standards is through bore hole, boring head, turning, milling male screw thread, milling female screw thread operation, inspect for acceptance, qualified i.e. carbon nanometer superfine material large gauge carbon resistance rod finished product, carries out marking according to client's specific requirement, pack, is qualified finished product.
Carbon nanometer superfine material large gauge carbon resistance rod provided by the present invention, solid material electric calcined anthracite after forging, petroleum coke, graphite is broken, carry out ultra micro carbon nanoscale powder material abrasive dust through bolting and high-effect milling equipment, electronic proportioning system enters a kind of double speed energy-efficient kneading pot and add after treated additive (carbonate) stirs, is dry mixed simultaneously after preparing burden, add coal tar pitch.There is because ultra micro carbon nanoscale powder material is very tiny the contact area increased between raw material, improve the absorption property of storeroom, form ultra-thin adhesive film and have more active burnt grain, aggregate is combined fully with burnt intergranular, this adhesion is far longer than aggregate directly with the adhesion of binding agent, thus form more firmly carbon structure chain, form stronger combination.Improve the performance of electrode, the perfect internal structure of electrode, ensure that the safe application performance of carbon resistance rod, reaches and reduces electrode resistance rate, improve antioxygenic property, the anti-performance that fractures, stretch-proof performance; Extend the electrode life cycle life-span, reduce the object of burried arc furnace production cost.Carbon nanometer superfine material large gauge carbon resistance rod diameter can reach 1400mm, length reaches 2500mm---3300mm, adapt to the requirement of the large-scale burried arc furnace of smelting industry, meet or exceed the serviceability of international like product, reduce the manufacturing cost of smelting industry, improve the economic benefit of carbon resistance rod manufacturing industry and smelting industry simultaneously.In addition; can add in solid material after forging raw broken, roasting is broken; the raw broken and shaping rear defective raw product checked out of thickener; the paste slag remaining in forming process or drop; the cutting that roasting is broken when being the below proof and machine work that obtain after roasting is broken, thus, be conducive to the abundant recycling of raw material; reduce production cost, protection of the environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of carbon nanometer superfine material large gauge carbon resistance rod of the present invention.
Embodiment
The operation process preparing carbon nanometer superfine material large gauge carbon resistance rod to provided by the present invention below in conjunction with the drawings and specific embodiments and structure thereof are described in further detail.
As shown in Figure 1, carbon nanometer superfine material large gauge carbon resistance rod comprises electrode body 1, and electrode body 1 two ends are respectively arranged with the pin thread 2, the box 3 that match, and pin thread 2, box 3 are with the external screw thread 4 matched, internal thread 5.
Embodiment 1:
The first step: in broken, screening, abrasive dust
By the solid material electric calcined anthracite crushing and screening after forging, by petroleum coke, the broken a part of crushing and screening of graphite, a part carries out ultra micro carbon nanoscale powder material abrasive dust with high-effect milling equipment;
Second step: batching
Weigh up 8 weight portion particle diameters by component electronics feed proportioning system described in claim 1 to be greater than 8mm to be less than or equal to 16mm graphite broken, 16 weight portion particle diameters are greater than 4mm, and to be less than or equal to the graphite of 8mm broken, the graphite that 12 weight portion particle diameters are less than or equal to 4mm is broken, 8 weight portion particle diameters are greater than the petroleum coke that 8mm is less than or equal to 16mm, 12 weight portion particle diameters are greater than the petroleum coke that 4mm is less than or equal to 8mm, 10 weight portion particle diameters are less than or equal to the petroleum coke of 4mm, 3 weight portion electric calcined anthracites, 16 weight portion carbon nanoscale powder materials, 5 weight portions are raw broken, 4 weight portion roastings are broken, the energy-efficient kneading pot of double speed is entered after batching, the active additive (carbonate) of treated 0.3 weight portion is added kneading pot simultaneously,
3rd step: dry blend wet mixing
To the material of the energy-efficient kneading pot of double speed be joined, stir, be dry mixed 30 minutes, be heated to 160 DEG C, after be 170 DEG C by temperature, 18 weight portion coal tar pitch inject the energy-efficient kneading pot of double speed, continue to stir, kneading is after 30 minutes, and temperature rises to 165 DEG C of thickeners and takes the dish out of the pot;
4th step: shaping
The thickener that takes the dish out of the pot enters the horizontal electrode samming pot without pelletizing feed, making thickener temperature be down to 135 DEG C enters in the mould that vertical vibrating vacuumizes on forming machine, patrix press down rear slightly shake in advance within 8 seconds, lift parting line venting after vacuumize lasting 4 minutes again, vacuum degree-0.07MPa to-0.09MPa, after vibrating 8 minutes again, leave standstill pressurize by electrode demoulding spraying cooling after 30 minutes, and in cooling bay water-cooled 3 hours; Inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified raw product;
5th step: roasting
Carbon nanometer superfine material large gauge carbon resistance rod goods are transported to calcination department.First shove charge, green compact adopt vertical vertical dress, the distance 100mm between green compact, green compact and kiln wall distance 150mm, and the metallurgical coke of green compact lower end paving 150mm thickness, green compact upper end covers the metallurgical coke of 400mm thickness.Then temperature control is carried out, temperature from ambient is progressively risen to 1150 DEG C, major diameter carbonaceous electrode manufactured goods are discharged through room temperature-230 DEG C low-temperature prewarming, 230 DEG C of-400 DEG C of fugitive constituents, 400 DEG C of-550 DEG C of semicokes are shaping, after 550 DEG C of-700 DEG C of high-temperature-coked, 700 DEG C of-1150 DEG C of perfect performance four-stages, cease fire and be incubated, naturally cool, treat that temperature is down to less than 300 DEG C and is come out of the stove; After being cooled to room temperature, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified roasting product;
6th step: machine work
The carbon nanometer superfine material large gauge carbon resistance rod roasting product be up to the standards is through bore hole, boring head, turning, milling male screw thread, milling female screw thread operation, inspect for acceptance, qualified i.e. carbon nanometer superfine material large gauge carbon resistance rod finished product, carries out marking according to client's specific requirement, pack, is qualified finished product.
Embodiment 2:
The first step: in broken, screening, abrasive dust
By the solid material electric calcined anthracite crushing and screening after forging, by petroleum coke, the broken a part of crushing and screening of graphite, a part carries out ultra micro carbon nanoscale powder material abrasive dust with high-effect milling equipment;
Second step: batching
Weigh up by component electronics feed proportioning system described in claim 1: 12 weight portion particle diameters are greater than 8mm, and to be less than or equal to 16mm graphite broken, 18 weight portion particle diameters are greater than 4mm, and to be less than or equal to the graphite of 8mm broken, the graphite that 16 weight portion particle diameters are less than or equal to 4mm is broken, 12 weight portion particle diameters are greater than the petroleum coke that 8mm is less than or equal to 16mm, 16 weight portion particle diameters are greater than the petroleum coke that 4mm is less than or equal to 8mm, 12 weight portion particle diameters are less than or equal to the petroleum coke of 4mm, 8 weight portion electric calcined anthracites, 22 weight portion carbon nanoscale powder materials, 8 weight portions are raw broken, 6 weight portion roastings are broken, the energy-efficient kneading pot of double speed is entered after batching, the active additive (carbonate) of treated 0.8 weight portion is added kneading pot simultaneously,
3rd step: dry blend wet mixing
To the material of the energy-efficient kneading pot of double speed be joined, stir, be dry mixed 40 minutes, be heated to 170 DEG C, after be 178 DEG C by temperature, 20 weight portion coal tar pitch inject the energy-efficient kneading pot of double speed, continue to stir, kneading is after 33 minutes, and temperature rises to 170 DEG C of thickeners and takes the dish out of the pot;
4th step: shaping
The thickener that takes the dish out of the pot enters the horizontal electrode samming pot without pelletizing feed, making thickener temperature be down to 138 DEG C enters in the mould that vertical vibrating vacuumizes on forming machine, patrix presses down after the rear 8-10 that slightly shakes in advance lifts parting line venting second and vacuumizes lasting 5 minutes again, vacuum degree-0.07MPa to-0.09MPa, after vibrating 9 minutes again, leave standstill pressurize by electrode demoulding spraying cooling after 35 minutes, and in cooling bay water-cooled 3.5 hours, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified raw product;
5th step: roasting
Carbon nanometer superfine material large gauge carbon resistance rod goods are transported to calcination department.First shove charge, green compact adopt vertical vertical dress, the distance 110mm between green compact, green compact and kiln wall distance 200mm, and the metallurgical coke of green compact lower end paving 200mm thickness, green compact upper end covers the metallurgical coke of 500mm thickness.Then temperature control is carried out, temperature from ambient is progressively risen to 1150 DEG C, major diameter carbonaceous electrode manufactured goods are discharged through room temperature-230 DEG C low-temperature prewarming, 230 DEG C of-400 DEG C of fugitive constituents, 400 DEG C of-550 DEG C of semicokes are shaping, after 550 DEG C of-700 DEG C of high-temperature-coked, 700 DEG C of-1150 DEG C of perfect performance four-stages, cease fire and be incubated, naturally cool, treat that temperature is down to less than 300 DEG C and is come out of the stove; After being cooled to room temperature, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified roasting product;
6th step: machine work
The carbon nanometer superfine material large gauge carbon resistance rod roasting product be up to the standards is through bore hole, boring head, turning, milling male screw thread, milling female screw thread operation, inspect for acceptance, qualified i.e. carbon nanometer superfine material large gauge carbon resistance rod finished product, carries out marking according to client's specific requirement, pack, is qualified finished product.
Embodiment 3:
The first step: in broken, screening, abrasive dust
By the solid material electric calcined anthracite crushing and screening after forging, by petroleum coke, the broken a part of crushing and screening of graphite, a part carries out ultra micro carbon nanoscale powder material abrasive dust with high-effect milling equipment;
Second step: batching
Weigh up 16 weight portion particle diameters by component electronics feed proportioning system described in claim 1 to be greater than 8mm to be less than or equal to 16mm graphite broken, 20 weight portion particle diameters are greater than 4mm, and to be less than or equal to the graphite of 8mm broken, the graphite that 18 weight portion particle diameters are less than or equal to 4mm is broken, 16 weight portion particle diameters are greater than the petroleum coke that 8mm is less than or equal to 16mm, 20 weight portion particle diameters are greater than the petroleum coke that 4mm is less than or equal to 8mm, 14 weight portion particle diameters are less than or equal to the petroleum coke of 4mm, 12 weight portion electric calcined anthracites, 28 weight portion carbon nanoscale powder materials, 10 weight portions are raw broken, 10 weight portion roastings are broken, the energy-efficient kneading pot of double speed is entered after batching, the active additive (carbonate) of treated 1.2 weight portions is added kneading pot simultaneously,
3rd step: dry blend wet mixing
To the material of the energy-efficient kneading pot of double speed be joined, stir, be dry mixed 50 minutes, be heated to 180 DEG C, after be 185 DEG C by temperature, 23 weight portion coal tar pitch inject the energy-efficient kneading pot of double speed, continue to stir, kneading is after 35 minutes, and temperature rises to 175 DEG C of thickeners and takes the dish out of the pot;
4th step: shaping
The thickener that takes the dish out of the pot enters the horizontal electrode samming pot without pelletizing feed, making thickener temperature be down to 140 DEG C enters in the mould that vertical vibrating vacuumizes on forming machine, patrix press down rear slightly shake in advance within 10 seconds, lift parting line venting after vacuumize lasting 6 minutes again, vacuum degree-0.07MPa to-0.09MPa, after vibrating 10 minutes again, leave standstill pressurize by electrode demoulding spraying cooling after 40 minutes, and in cooling bay water-cooled 4 hours, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified raw product;
5th step: roasting
Carbon nanometer superfine material large gauge carbon resistance rod goods are transported to calcination department.First shove charge, green compact adopt vertical vertical dress, the distance 120mm between green compact, green compact and kiln wall distance 250mm, and the metallurgical coke of green compact lower end paving 250mm thickness, green compact upper end covers the metallurgical coke of 600mm thickness.Then temperature control is carried out, temperature from ambient is progressively risen to 1150 DEG C, major diameter carbonaceous electrode manufactured goods are discharged through room temperature-230 DEG C low-temperature prewarming, 230 DEG C of-400 DEG C of fugitive constituents, 400 DEG C of-550 DEG C of semicokes are shaping, after 550 DEG C of-700 DEG C of high-temperature-coked, 700 DEG C of-1150 DEG C of perfect performance four-stages, cease fire and be incubated, naturally cool, treat that temperature is down to less than 300 DEG C and is come out of the stove, after being cooled to room temperature, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified roasting product;
6th step: machine work
The carbon nanometer superfine material large gauge carbon resistance rod roasting product be up to the standards is through bore hole, boring head, turning, milling male screw thread, milling female screw thread operation, inspect for acceptance, qualified i.e. carbon nanometer superfine material large gauge carbon resistance rod finished product, carries out marking according to client's specific requirement, pack, is qualified finished product.
Claims (3)
1. carbon nanometer superfine material large gauge carbon resistance rod, is characterized in that the component comprising following weight portion:
Particle diameter is greater than broken 8-16 weight portions of graphite that 8mm is less than or equal to 16mm
Particle diameter is greater than broken 16-20 weight portions of graphite that 4mm is less than or equal to 8mm
Particle diameter is less than or equal to broken 12-18 weight portions of graphite of 4mm
Particle diameter is greater than petroleum coke 8-16 weight portion that 8mm is less than or equal to 16mm
Particle diameter is greater than petroleum coke 12-20 weight portion that 4mm is less than or equal to 8mm
Particle diameter is less than or equal to petroleum coke 10-14 weight portion of 4mm
Electric calcined anthracite 3-12 weight portion
Coal tar pitch 18-23 weight portion
Carbon nanoscale powder material 16-28 weight portion.
2. carbon nanometer superfine material large gauge carbon resistance rod as claimed in claim 1, characterized by further comprising the component of following weight portion:
Raw broken 5-10 weight portions
Broken 4-10 weight portions of roasting
Active additive (carbonate) 0.3-1.2 weight portion.
3. prepare the method for carbon nanometer superfine material large gauge carbon resistance rod as claimed in claim 1, it is characterized in that comprising the following steps:
The first step: in broken, screening, abrasive dust
By the solid material electric calcined anthracite crushing and screening after forging, by petroleum coke, the broken a part of crushing and screening of graphite, a part carries out ultra micro carbon nanoscale powder material abrasive dust with high-effect milling equipment;
Second step: batching
Weigh up 8-16 weight portion particle diameters by component electronics feed proportioning system described in claim 1 to be greater than 8mm to be less than or equal to 16mm graphite broken, 16-20 weight portion particle diameters are greater than 4mm, and to be less than or equal to the graphite of 8mm broken, the graphite that 12-18 weight portion particle diameters are less than or equal to 4mm is broken, 8-16 weight portion particle diameters are greater than the petroleum coke that 8mm is less than or equal to 16mm, 12-20 weight portion particle diameters are greater than the petroleum coke that 4mm is less than or equal to 8mm, 10-14 weight portion particle diameters are less than or equal to the petroleum coke of 4mm, 3-12 weight portion electric calcined anthracites, 16-28 weight portion carbon nanoscale powder materials, 5-10 weight portions are raw broken, 4-10 weight portion roastings are broken, the energy-efficient kneading pot of double speed is entered after batching, the active additive (carbonate) of treated 0.3-1.2 weight portions is added kneading pot simultaneously,
3rd step: dry blend wet mixing
The material of the energy-efficient kneading pot of double speed will be joined, stir, be dry mixed 30-50 minutes, be heated to 160 DEG C-180 DEG C, after be 170 DEG C-185 DEG C by temperature, 18-23 weight portion coal tar pitch inject the energy-efficient kneading pot of double speed, continue to stir, kneading is after 30-35 minutes, and temperature rises to 165 DEG C of-175 DEG C of thickeners and takes the dish out of the pot;
4th step: shaping
The thickener that takes the dish out of the pot enters the horizontal electrode samming pot without pelletizing feed, making thickener temperature be down to 135 DEG C-140 DEG C enters in the mould that vertical vibrating vacuumizes on forming machine, patrix presses down after the rear 8-10 that slightly shakes in advance lifts parting line venting second and vacuumizes lasting 4-6 minute again, vacuum degree-0.07MPa to-0.09MPa, after vibrating 8-10 minutes again, leave standstill pressurize after 30-40 minutes by electrode demoulding spraying cooling, and in cooling bay water-cooled 3-4 hours, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified raw product;
5th step: roasting
Carbon nanometer superfine material large gauge carbon resistance rod raw product is transported to calcination department; First shove charge, green compact adopt vertical vertical dress, the distance 100mm between green compact-120mm, green compact and kiln wall distance 150mm-250mm, the metallurgical coke of green compact lower end paving 150mm-250mm thickness, green compact upper end covers the metallurgical coke of 400mm-600mm thickness; Then temperature control is carried out, temperature from ambient is progressively risen to 1150 DEG C, major diameter carbonaceous electrode manufactured goods are discharged through room temperature-230 DEG C low-temperature prewarming, 230 DEG C of-400 DEG C of fugitive constituents, 400 DEG C of-550 DEG C of semicokes are shaping, after 550 DEG C of-700 DEG C of high-temperature-coked, 700 DEG C of-1150 DEG C of perfect performance four-stages, cease fire and be incubated, naturally cool, treat that temperature is down to less than 300 DEG C and is come out of the stove, after being cooled to room temperature, inspect for acceptance, what reach checking and accepting technology standard-required is labeled as qualified roasting product;
6th step: machine work
The carbon nanometer superfine material large gauge carbon resistance rod roasting product be up to the standards is through bore hole, boring head, turning, milling male screw thread, milling female screw thread operation, inspect for acceptance, qualified i.e. carbon nanometer superfine material large gauge carbon resistance rod finished product, carries out marking according to client's specific requirement, pack, is qualified finished product.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106809814A (en) * | 2016-12-27 | 2017-06-09 | 河北顺天电极有限公司 | A kind of carbon electrode high and preparation method thereof |
| CN109456079A (en) * | 2018-12-29 | 2019-03-12 | 宁夏宁平炭素有限责任公司 | The preparation method of mineral hot furnace thermal-insulating type micropore electric furnace carbon block |
| CN109665845A (en) * | 2019-02-12 | 2019-04-23 | 合肥炭素有限责任公司 | A kind of preparation method of composite graphite electrode |
| CN115159989A (en) * | 2020-10-14 | 2022-10-11 | 宁夏宁平炭素有限责任公司 | Production method of carbon block for large-section submerged arc furnace |
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