CN1880511A - High-density semi-graphite cathode carbon block and method for producing same - Google Patents
High-density semi-graphite cathode carbon block and method for producing same Download PDFInfo
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- CN1880511A CN1880511A CN 200610017795 CN200610017795A CN1880511A CN 1880511 A CN1880511 A CN 1880511A CN 200610017795 CN200610017795 CN 200610017795 CN 200610017795 A CN200610017795 A CN 200610017795A CN 1880511 A CN1880511 A CN 1880511A
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Abstract
The invention discloses a high-bulk dense semi-graphite cathode carbon block, which comprises the following steps: weighing raw material according to percentage of 15 percent electric-forging anthracite, 50 percent electric-forge petroleum tar, 5 percent graphite, 15 percent stub, 15 percent modified coal tar; screening materials; mating; mixing to pinch at 155-165 deg.c; moulding at 110-130 deg.c; sintering at 1250-1300 deg.c; immersing; sintering again at 1200-1250 deg.c; manufacturing. The invention possesses over 16 percent weighing rate, 1.62 g/cm3 bulk density, whose anti-pressure strength reaches over 38Mpa.
Description
One, technical field:
The present invention relates to a kind of cathode carbon pieces and production method thereof, particularly a kind of high-density semi-graphite cathode carbon piece and production method thereof.
Two, background technology: aluminium cell is the main equipment in the aluminium refining industry, and build by laying bricks or stones with the charcoal piece usually at its bottom land negative electrode position.Popular cathode carbon pieces kind mainly contains conventional cathode charcoal piece and semi-graphite cathode carbon block in the market.Conventional cathode charcoal piece is a main material production with the general hard coal of forging, because its calcining temperature is low, the conventional cathode charcoal piece resistivity of making thus is higher, electrolytic expansivity is very high, corroded by ionogen, the early damage of electrolyzer takes place, at present except that the small-sized electrolyzer of minority still using, big-and-middle-sized electrolyzer has not re-used conventional cathode charcoal piece.Semi-graphite cathode carbon block is main material production with the electric forging coal, with the general coal facies ratio of forging, the calcining degree of depth of electric forging coal increases, the also corresponding raising of performance of corresponding semi-graphite cathode carbon block, but owing to the thermograde that exists in the electric forge furnace radially, electric forging coal calcining quality is even inadequately, has influenced charcoal piece use properties.In order to solve this type of problem, many producers have added graphite in the semi-graphite cathode carbon block batching, improved the performance of semi-graphite cathode carbon block, but when the graphite addition surpasses 50%, the charcoal piece can produce a large amount of layering waste products in roasting process, say it is infeasible from the angle of economy.Conventional cathode charcoal piece and semi-graphite cathode carbon block are all without greying, because the restriction on this technological process, charcoal piece performance can not obtain breakthrough raising.
Three, summary of the invention:
The object of the invention:
For overcoming the deficiency and the defective of existing semi-graphite cathode carbon block, invented the high-density semi-graphite cathode carbon piece that a kind of volume density is big, ultimate compression strength is high, another object of the present invention has provided the production method of high-density semi-graphite cathode carbon piece.
Technical scheme of the present invention is:
A kind of high-density semi-graphite cathode carbon piece is represented with weight percent, contains electric calcined anthracite 15-40% in the raw material, and electricity is forged refinery coke 20-50%, the broken 5-30% of graphite, anode scrap 8-30%, modified coal asphalt 15-25%.
Described high-density semi-graphite cathode carbon piece, electric calcined anthracite 20-35% wherein, electricity is forged refinery coke 25-45%, the broken 10-25% of graphite, anode scrap 10-25%, modified coal asphalt 15-20%.
Described electric calcined anthracite granularity is 12-0mm, wherein 12-8mm granularity purity is 5～20% greater than 80% electric calcined anthracite consumption, 8-4mm granularity purity is 10～25% greater than 80% electric calcined anthracite consumption, described electricity forges that the granularity purity less than 0.075mm is 64～70% in the refinery coke, and consumption is 30～45%.
Described electric calcined anthracite and electricity forge that refinery coke obtains through the calcining of 2000-2150 ℃ electricity.
The production method of described high-density semi-graphite cathode carbon piece, comprise material screening, batching, mix pinch, moulding, bakes to burn the article, dipping, re-baking, manufacturing procedure and to finished product, (1) take by weighing by prescription that electric calcined anthracite, electricity are forged refinery coke, graphite is broken and anode scrap as siccative, take by weighing modified coal asphalt after dissolving as binding agent, siccative and mixed the pinching in the pot of binding agent adding are stirred, mix
(2) kneading temperature is 155-165 ℃,
(3) mold temperature is 110-130 ℃,
(4) the bakes to burn the article temperature is 1250-1300 ℃,
(5) the re-baking temperature is 1200-1250 ℃.
It is to adopt heat-conducting oil heating technology, solution time 72-120 hour, melting temperature 170-180 ℃ that described modified coal asphalt dissolves.
Described dipping is to flood in the high-pressure impregnation jar, and soaker adopts special-purpose dipping medium temperature coal pitch, and the impregnating autoclave internal pressure is lower than-0.095MPa, and moulding pressure is controlled at 1.35-1.5Mpa, and be 4-5 hour clamping time.
Positive beneficial effect of the present invention:
(1) the present invention utilizes existing high-pressure impregnation equipment that product is carried out high-pressure impregnation, and rate of body weight gain is up to more than 16%, and the finished product volume density is by 1.54g/cm
3Bring up to 1.62g/cm
3More than, ultimate compression strength is brought up to more than the 38MPa by 30MPa, and other technical indicator reaches industry standard, referring to table 1.
The performance index of table 1 high-density semi-graphite cathode carbon piece
| The trade mark | Ash content % | Resistivity μ Ω m | Electrolytic expansivity % | Compressive strength MPa | True density g/cm 3 | Volume density g/cm 3 |
| Be not more than | Be not less than | |||||
| 1 grade | 5 | 38 | 1.0 | 42 | 1.98 | 1.60 |
| 2 grades | 6 | 42 | 1.2 | 38 | 1.96 | 1.58 |
(2) substitute the part hard coal with anode scrap, reduce anthracitic usage ratio, replace medium temperature coal pitch, increase refinery coke, the broken consumption of graphite, optimized formula for a product, reduced production cost with modified pitch.
(3) mature production technology of the present invention is easy to apply, and has better economic and social benefit.
Four, description of drawings: Fig. 1 is the technological process of production of high-density semi-graphite cathode carbon piece.
Five, embodiment:
Illustrate the production method of high-density semi-graphite cathode carbon piece below.
Embodiment one: the production stage of high-density semi-graphite cathode carbon piece
Raw material electric calcined anthracite, electricity are forged refinery coke to be calcined through 2000-2150 ℃ electricity, through in broken, screening, processing in small, broken bits, take by weighing the electric calcined anthracite 15% that granularity is 12-0mm by prescription, (wherein 12-8mm granularity purity is 5% greater than 80% electric calcined anthracite consumption, 8-4mm granularity purity is 10% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 50%, (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 30%), graphite broken 5%, anode scrap 15%, modified coal asphalt 15%.
With electric calcined anthracite, the electricity of weighing forge refinery coke, graphite is broken and anode scrap as siccative, add to mix to pinch in the pot and stir, do and mixed 20-25 minute, the siccative temperature is controlled between 110-120 ℃; Modified coal asphalt adopts heat-conducting oil heating technology to dissolve, and dissolves 72-120 hour, melting temperature 170-180 ℃, dissolves the back and adds mixed pinching pot interior wet mixing 40-45 minute as binding agent; Go out to mix to pinch pot preceding thickener heating and temperature control between 155-165 ℃, get rid of bitumen flue gas through the cold material, the thickener cooling temperature is controlled at 110-130 ℃, enter and give pressure in the press, sub-pressure pressure is not less than 20MPa, give pressing after 7-9 minute and carry out extrusion molding, squeeze pressure is controlled between the 12-18Mpa.
Product after the moulding is packed into after the acceptance(check) on inspection in batches and is carried out the product shove charge by the technical requirements of working specification in the stoving oven, intensification through 16～20 days, the bakes to burn the article top temperature is controlled between 1250-1300 ℃, product temperature guarantees between 1050-1100 ℃, cool then, tapping temperature is controlled at below 300 ℃.After coming out of the stove product surface is cleaned out examination, product is packed into is no less than 8 hours preheating in the preheating oven, and preheating temperature remains on 380 ± 10 ℃.
Enter then in the high-pressure impregnation jar and flood, soaker adopts special-purpose dipping medium temperature coal pitch, and the impregnating autoclave internal pressure is lower than-0.095MPa, and moulding pressure is controlled at 1.35-1.5Mpa, and be 4-5 hour clamping time; Product is fully soaked into, and rate of body weight gain is not less than 15%, reinstalls the re-baking that carries out 1200-1250 ℃ in the stoving oven, comes out of the stove after machining is finished product after the assay was approved.
Embodiment two: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 10% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 40% in the raw material, 8-4mm granularity purity is 15% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 20%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 15%), graphite is broken 17%, anode scrap 8%, modified coal asphalt 15%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment three: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 5% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 18% in the raw material, 8-4mm granularity purity is 13% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 25%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 10%), graphite is broken 30%, anode scrap 10%, modified coal asphalt 17%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment four: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 10% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 25% in the raw material, 8-4mm granularity purity is 15% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 25%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 15%), graphite is broken 5%, anode scrap 30%, modified coal asphalt 15%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment five: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 15% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 35% in the raw material, 8-4mm granularity purity is 20% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 30%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 20%), graphite is broken 10%, anode scrap 8%, modified coal asphalt 17%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment six: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 7% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 16% in the raw material, 8-4mm granularity purity is 9% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 22%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 15%), graphite is broken 20%, anode scrap 20%, modified coal asphalt 22%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment seven: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 5% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 20% in the raw material, 8-4mm granularity purity is 15% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 30%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 25%), graphite is broken 12%, anode scrap 13%, modified coal asphalt 25%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment eight: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 5% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 15% in the raw material, 8-4mm granularity purity is 10% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 20%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 15%), graphite is broken 25%, anode scrap 25%, modified coal asphalt 15%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment nine: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 10% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 20% in the raw material, 8-4mm granularity purity is 10% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 45%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 30%), graphite is broken 10%, anode scrap 8%, modified coal asphalt 17%, other require and production stage with embodiment one, no longer auspicious stating.
Embodiment ten: basic identical with embodiment one, difference is:
(wherein 12-8mm granularity purity is 5% greater than 80% electric calcined anthracite consumption to electric calcined anthracite 15% in the raw material, 8-4mm granularity purity is 10% greater than 80% electric calcined anthracite consumption), electricity is forged refinery coke 30%, and (wherein the granularity purity less than 0.075mm is 64～70%, consumption is 25%), graphite is broken 20%, anode scrap 15%, modified coal asphalt 20%, other require and production stage with embodiment one, no longer auspicious stating.
Claims (7)
1, a kind of high-density semi-graphite cathode carbon piece is characterized in that: represent with weight percent, contain in the raw material
Electric calcined anthracite 15-40%
Electricity is forged refinery coke 20-50%
The broken 5-30% of graphite
Anode scrap 8-30%
Modified coal asphalt 15-25%
2, the described high-density semi-graphite cathode carbon piece of a kind of claim 1, it is characterized in that: raw material is
Electric calcined anthracite 20-35%
Electricity is forged refinery coke 25-45%
The broken 10-25% of graphite
Anode scrap 10-25%
Modified coal asphalt 15-20%
3, high-density semi-graphite cathode carbon piece according to claim 1 and 2, it is characterized in that: described electric calcined anthracite granularity is 12-0mm, wherein 12-8mm granularity purity is 5～20% greater than 80% electric calcined anthracite consumption, 8-4mm granularity purity is 10～25% greater than 80% electric calcined anthracite consumption, described electricity forges that the granularity purity less than 0.075mm is 64～70% in the refinery coke, and consumption is 30～45%.
4, high-density semi-graphite cathode carbon piece according to claim 1 and 2 is characterized in that: described electric calcined anthracite and electricity forge that refinery coke obtains through the calcining of 2000-2150 ℃ electricity.
5, the production method of a kind of claim 1 or 2 described high-density semi-graphite cathode carbon pieces, comprise material screening, batching, mix pinch, moulding, bakes to burn the article, dipping, re-baking, manufacturing procedure and, it is characterized in that to finished product:
(1) take by weighing by prescription that electric calcined anthracite, electricity are forged refinery coke, graphite is broken and anode scrap as siccative, take by weighing modified coal asphalt after dissolving as binding agent, siccative and binding agent are added to mix to pinch in the pot stir, mix,
(2) kneading temperature is 155-165 ℃,
(3) mold temperature is 110-130 ℃,
(4) the bakes to burn the article temperature is 1250-1300 ℃,
(5) the re-baking temperature is 1200-1250 ℃.
6, the production method of high-density semi-graphite cathode carbon piece according to claim 5 is characterized in that: it is to adopt heat-conducting oil heating technology, solution time 72-120 hour, melting temperature 170-180 ℃ that described modified coal asphalt dissolves.
7, the production method of high-density semi-graphite cathode carbon piece according to claim 5, it is characterized in that: described dipping is to flood in the high-pressure impregnation jar, soaker adopts special-purpose dipping medium temperature coal pitch, the impregnating autoclave internal pressure is lower than-0.095MPa, moulding pressure is controlled at 1.35-1.5Mpa, and be 4-5 hour clamping time.
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| CNB2006100177952A CN100494507C (en) | 2006-05-17 | 2006-05-17 | High-density semi-graphite cathode carbon block and method for producing same |
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| CNB2006100177952A CN100494507C (en) | 2006-05-17 | 2006-05-17 | High-density semi-graphite cathode carbon block and method for producing same |
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| CN1880511A true CN1880511A (en) | 2006-12-20 |
| CN100494507C CN100494507C (en) | 2009-06-03 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101993246B (en) * | 2009-08-27 | 2013-02-20 | 河南方圆炭素集团有限公司 | Thermal conductive graphite blocks for blast-furnace bottom and hearth |
| 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 |
| CN106967438A (en) * | 2017-03-18 | 2017-07-21 | 大同新成新材料股份有限公司 | A kind of preparation method of lightning protection resistance-reducing grounding module material |
| CN107814573A (en) * | 2017-11-29 | 2018-03-20 | 鲁山县方圆工程技术有限公司 | Ferronickel electric furnace high heat conduction resistant to corrosion carbon block and preparation method thereof |
| CN110395985A (en) * | 2019-07-26 | 2019-11-01 | 石嘴山市长城碳素有限公司 | A kind of carbon furnace lining material production technology |
| CN111621813A (en) * | 2020-07-06 | 2020-09-04 | 山西三晋碳素股份有限公司 | Cathode carbon block material for aluminum electrolysis |
| CN113501515A (en) * | 2021-07-29 | 2021-10-15 | 濮方正 | Innovative process for manufacturing anthracite into conductor material |
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2006
- 2006-05-17 CN CNB2006100177952A patent/CN100494507C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993246B (en) * | 2009-08-27 | 2013-02-20 | 河南方圆炭素集团有限公司 | Thermal conductive graphite blocks for blast-furnace bottom and hearth |
| 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 |
| CN106967438A (en) * | 2017-03-18 | 2017-07-21 | 大同新成新材料股份有限公司 | A kind of preparation method of lightning protection resistance-reducing grounding module material |
| CN107814573A (en) * | 2017-11-29 | 2018-03-20 | 鲁山县方圆工程技术有限公司 | Ferronickel electric furnace high heat conduction resistant to corrosion carbon block and preparation method thereof |
| CN110395985A (en) * | 2019-07-26 | 2019-11-01 | 石嘴山市长城碳素有限公司 | A kind of carbon furnace lining material production technology |
| CN111621813A (en) * | 2020-07-06 | 2020-09-04 | 山西三晋碳素股份有限公司 | Cathode carbon block material for aluminum electrolysis |
| CN113501515A (en) * | 2021-07-29 | 2021-10-15 | 濮方正 | Innovative process for manufacturing anthracite into conductor material |
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| CN100494507C (en) | 2009-06-03 |
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