CN101748441B - Method and device for preparing high-density aluminium cell anode carbon block green body - Google Patents
Method and device for preparing high-density aluminium cell anode carbon block green body Download PDFInfo
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- CN101748441B CN101748441B CN2010101001728A CN201010100172A CN101748441B CN 101748441 B CN101748441 B CN 101748441B CN 2010101001728 A CN2010101001728 A CN 2010101001728A CN 201010100172 A CN201010100172 A CN 201010100172A CN 101748441 B CN101748441 B CN 101748441B
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Abstract
The invention relates to a method and a device for preparing a high-density aluminium cell anode carbon block green body. The device is in a one-way pressure-giving structure or a two-way pressure-giving structure and is composed of an upper press mould core, a section mould insulated liner, a section mould steel shell, a thermocouple, a lower press mould core and a power supply. Firstly, an anode paste is prepared and is poured in a mould cavity; then the upper press mould core and the lower press mould core put press on the anode paste, and at the same time current is led into the anode paste in the mould cavity by the upper press mould core and the lower press mould core; when the anode paste is heated to 150-250 DEG C and the put pressure reaches 40-70 MPa, after the pressure is kept for 30-100 seconds, the current is cut off, the pressure is released, and then the mould is released. The anode carbon block green body prepared by the method has the advantages that the density of the prepared anode carbon block after calcination by a conventional method is 1.58-1.70g/cm<3>, the specific resistance is 50-65ome mm2/m, the compressive strength is 40-50MPa, and the thermal expansion coefficient is 3.5-4.0 x 10-6/K.
Description
Technical field
The invention belongs to the aluminum electrolysis technology field, be specifically related to the technology of preparing of aluminium cell anode.
Background technology
In Aluminium Electrolysis, carbon anode is known as " heart of aluminium cell ", and the anodic quality directly affects the operation conditions and the technico-economical comparison thereof of aluminium cell.The practice of large-scale aluminum electrolytic cell shows that the fault of electrolyzer has about 70% because of the anode generation.Causing these cause faults is that the anode produced is second-rate, at present the anode block overwhelming majority of used for aluminium electrolysis is to be that aggregate is allocated anode anode scrap partly into the refinery coke after the calcining, after being the binding agent kneading and compacting with the coal-tar pitch, in stoving oven, obtain through high-temperature roasting.The add-on of general anode batching medium pitch is 14～18%, and the anode block density after the roasting is generally at 1.55g/cm
3About.The density that improves carbon anode can improve anodic work-ing life, reduces the oxidation of coal loss, reduces anode consumption.The higher anode block of density is the intensity height not only, and conducts electricity very well, and helps reducing the strength of current of the power consumption and the intensified electrolysis groove of Aluminium Electrolysis.The density that improves the carbon anode green compact is to improve the fundamental method of carbon anode density, and the method for present industrial production aluminium cell carbon anode green compact has two kinds, and a kind of is the vibratory compaction method, and another kind is a compression molding method.Though the principle of two kinds of methods is inequality, all be subjected to the restriction of paste property and method itself, be difficult on the existing basis and improve a lot.
Summary of the invention
At above prior art problems, the invention provides a kind of method and apparatus of producing high-density aluminium cell anode carbon block green body, further improve aluminium cell carbon anode green density and carbon anode density.
The device of producing high-density aluminium cell anode carbon block green body of the present invention is the device that direct resistive heating hot compression molding is produced high density carbon anode green compact, by top die core, pattern insulated liner, pattern box hat, thermopair, press down core rod and power supply constitutes, pattern box hat inwall is provided with the pattern insulated liner, the inwall of top die core sidewall and pattern insulated liner fits tightly, the top die core can two-wayly slide, and can slide up or down.Thermopair passes pattern box hat and pattern insulated liner, is used to measure the temperature of anode paste.The top die core, press down core rod and be connected with a utmost point of power supply respectively.The material of pattern insulated liner is refractory concrete or carbonitride of silicium or high temperature ceramic material.Top die core and press down core rod and make by forged steel, and have the function of conduction.
Device of the present invention is unidirectional laminated structure or the two-way laminated structure of giving given:
(1) the unidirectional device of giving laminated structure, the bottom that presses down core rod has to two side-prominent structures, should contact with the lower surface of pattern box hat by outstanding structure upper surface with the pattern insulated liner, the inwall that presses down core rod sidewall and pattern insulated liner fits tightly, press down the unidirectional slip of core rod energy, promptly can only be to lower slip.
(2) the two-way device of giving laminated structure, the inwall that presses down core rod sidewall and pattern insulated liner fits tightly, and presses down the two-way slip of core rod energy, can slide up or down.
The method that the employing said apparatus is produced high-density aluminium cell anode carbon block green body is as follows.
At first prepare anode paste.Anode paste proportioning of the present invention by mass percentage, after-smithing petroleum coke 55～90%, carbon anode anode scrap are 0～30%, all the other are coal-tar pitch.Wherein after-smithing petroleum coke and carbon anode anode scrap are aggregate, and coal-tar pitch is a binding agent, and the granularity of coal pitch of agglomerant is not done requirement.The size composition of aggregate is four grade prescriptions, wherein the coarse grain granularity is 9.00～15.00mm, a middle grain granularity is 4.00～8.99mm, the particulate granularity is 0.15～3.99mm, and powder granularity 0.01～0.14mm is according to the mass percent meter, wherein the coarse grain aggregate is 5～20%, a middle grain aggregate is 5～30%, and fine particle aggregate is 10～40%, and all the other are the powder aggregate.The mixed employing ordinary method of pinching of anode paste.
Place the bottom of die cavity with pressing down core rod, the top die core is proposed die cavity, pour in the die cavity mixing the anode paste of pinching; With the top die core be pressed in anode paste above, then by the top die core with press down core rod antianode thickener and exert pressure, simultaneously with electric current by the top die core with press down core rod and import anode paste in the die cavity, the anode paste of being pressed is heated simultaneously and pressurizes, in this process, the fusing of binder pitch in the anode paste, be squeezed in the space between the aggregate and the hole of particles of aggregates itself in, aggregate and binder pitch are become one.
When anode paste be heated to 150～250 ℃, when applied pressure reaches 40～70MPa; keep this pressure to cut off electric current in 30～100 seconds afterwards; and relief pressure; with the top die core with press down core rod and propose; and pattern box hat, pattern insulated liner and molded anode green compact are moved on in the stripper together, the anode green compact that are compacted in the die cavity are deviate to become the carbon anode green compact in die cavity.
Perhaps after cutting off electric current and relief pressure, will press down core rod and shift out, on the top die core, exert pressure then, anode green compact molded in the die cavity will be extruded.
The anode green compact of the present invention's preparation, the anode block density 1.58～1.70g/cm that after conventional method roasting, makes
3, than resistance 50～65 Ω mm
2/ m, ultimate compression strength 40～50MPa, thermal expansivity 3.5～4.0 * 10
-6/ K.Not only density is big, intensity is high, and conductivity is good.
Description of drawings
Fig. 1 is the unidirectional apparatus structure synoptic diagram of the present invention of giving laminated structure;
Fig. 2 is the two-way apparatus structure synoptic diagram of the present invention of giving laminated structure.
Among the figure: 1 top die core, 2 pattern insulated liner, 3 pattern box hats, 4 thermopairs, 5 anode pastes, 6 press down core rod, 7 power supplys.
Embodiment
Further specify the present invention by the following examples.
As shown in drawings, the device of producing high-density aluminium cell anode carbon block green body of the present invention is the device that direct resistive heating hot compression molding is produced high density carbon anode green compact, by top die core 1, pattern insulated liner 2, pattern box hat 3, thermopair 4, press down core rod 6 and power supply 7 constitutes, pattern box hat 3 inwalls are provided with pattern insulated liner 2, the inwall of top die core 1 sidewall and pattern insulated liner 2 fits tightly, top die core 1 can two-wayly slide, and can slide up or down.Thermopair 4 passes pattern box hat 3 and pattern insulated liner 2, is used to measure the temperature of anode paste 5.Top die core 1, press down core rod 6 and be connected with a utmost point of power supply 7 respectively.The material of pattern insulated liner 2 is refractory concrete or carbonitride of silicium or high temperature ceramic material.Top die core 1 and press down core rod 6 and make by forged steel, and have the function of conduction.
Device of the present invention is unidirectional laminated structure or the two-way laminated structure of giving given:
(1) the unidirectional device of giving laminated structure, the bottom that presses down core rod 6 has to two side-prominent structures, should contact with the lower surface of pattern box hat 3 by outstanding structure upper surface with pattern insulated liner 2, the inwall that presses down core rod 6 sidewalls and pattern insulated liner 2 fits tightly, press down the unidirectional slip of core rod 6 energy, promptly can only be to lower slip.
(2) the two-way device of giving laminated structure, the inwall that presses down core rod 6 sidewalls and pattern insulated liner 2 fits tightly, and presses down the two-way slip of core rod 6 energy, can slide up or down.
The method of producing high-density aluminium cell anode carbon block green body is as follows.
At first prepare anode paste.Anode paste proportioning of the present invention by mass percentage, after-smithing petroleum coke 75%, carbon anode anode scrap are 15%, all the other are coal-tar pitch.Wherein after-smithing petroleum coke and carbon anode anode scrap are aggregate, and coal-tar pitch is a binding agent, and the granularity of coal pitch of agglomerant is not done requirement.The size composition of aggregate is four grade prescriptions, wherein the coarse grain granularity is 12.00mm, a middle grain granularity is 6.50mm, the particulate granularity is 2.00mm, and powder granularity 0.08mm is according to the mass percent meter, wherein the coarse grain aggregate is 12%, a middle grain aggregate is 17%, and fine particle aggregate is 25%, and all the other are the powder aggregate.The mixed employing ordinary method of pinching of anode paste.
Place the bottom of die cavity with pressing down core rod, the top die core is proposed die cavity, pour in the die cavity mixing the anode paste of pinching; With the top die core be pressed in anode paste above, then by the top die core with press down core rod antianode thickener and exert pressure, simultaneously with electric current by the top die core with press down core rod and import anode paste in the die cavity, the anode paste of being pressed is heated simultaneously and pressurizes, in this process, the fusing of binder pitch in the anode paste, be squeezed in the space between the aggregate and the hole of particles of aggregates itself in, aggregate and binder pitch are become one.
When anode paste be heated to 200 ℃, when applied pressure reaches 55MPa; keep this pressure to cut off electric current in 65 seconds afterwards; and relief pressure; with the top die core with press down core rod and propose; and pattern box hat, pattern insulated liner and molded anode green compact are moved on in the stripper together, the anode green compact that are compacted in the die cavity are deviate to become the carbon anode green compact in die cavity.
The method of producing high-density aluminium cell anode carbon block green body is as follows.
At first prepare anode paste.Anode paste proportioning of the present invention by mass percentage, after-smithing petroleum coke 90%, all the other are coal-tar pitch.Wherein after-smithing petroleum coke is an aggregate, and coal-tar pitch is a binding agent, and the granularity of coal pitch of agglomerant is not done requirement.The size composition of aggregate is four grade prescriptions, wherein the coarse grain granularity is 15.00mm, a middle grain granularity is 8.90mm, the particulate granularity is 3.90mm, and powder granularity 0.14mm is according to the mass percent meter, wherein the coarse grain aggregate is 20%, a middle grain aggregate is 30%, and fine particle aggregate is 10%, and all the other are the powder aggregate.The mixed employing ordinary method of pinching of anode paste.
Place the bottom of die cavity with pressing down core rod, the top die core is proposed die cavity, pour in the die cavity mixing the anode paste of pinching; With the top die core be pressed in anode paste above, then by the top die core with press down core rod antianode thickener and exert pressure, simultaneously with electric current by the top die core with press down core rod and import anode paste in the die cavity, the anode paste of being pressed is heated simultaneously and pressurizes, in this process, the fusing of binder pitch in the anode paste, be squeezed in the space between the aggregate and the hole of particles of aggregates itself in, aggregate and binder pitch are become one.
When anode paste is heated to 250 ℃, when applied pressure reaches 70MPa, keeps this pressure to cut off electric current after 30 seconds, and relief pressure, will press down core rod and shift out, on the top die core, exert pressure then, anode green compact molded in the die cavity are extruded.
The method of producing high-density aluminium cell anode carbon block green body is as follows.
At first prepare anode paste.Anode paste proportioning of the present invention by mass percentage, after-smithing petroleum coke 55%, carbon anode anode scrap are 30%, all the other are coal-tar pitch.Wherein after-smithing petroleum coke and carbon anode anode scrap are aggregate, and coal-tar pitch is a binding agent, and the granularity of coal pitch of agglomerant is not done requirement.The size composition of aggregate is four grade prescriptions, and wherein the coarse grain granularity is 9.00mm, and middle grain granularity is 4.00mm, and the particulate granularity is 0.15mm, powder granularity 0.01mm, according to the mass percent meter, wherein the coarse grain aggregate is 5%, a middle grain aggregate is 5%, and fine particle aggregate is 40%, and all the other are the powder aggregate.The mixed employing ordinary method of pinching of anode paste.
Place the bottom of die cavity with pressing down core rod, the top die core is proposed die cavity, pour in the die cavity mixing the anode paste of pinching; With the top die core be pressed in anode paste above, then by the top die core with press down core rod antianode thickener and exert pressure, simultaneously with electric current by the top die core with press down core rod and import anode paste in the die cavity, the anode paste of being pressed is heated simultaneously and pressurizes, in this process, the fusing of binder pitch in the anode paste, be squeezed in the space between the aggregate and the hole of particles of aggregates itself in, aggregate and binder pitch are become one.
When anode paste be heated to 150 ℃, when applied pressure reaches 40MPa; keep this pressure to cut off electric current in 100 seconds afterwards; and relief pressure; with the top die core with press down core rod and propose; and pattern box hat, pattern insulated liner and molded anode green compact are moved on in the stripper together, the anode green compact that are compacted in the die cavity are deviate to become the carbon anode green compact in die cavity.
Claims (4)
1. device of producing high-density aluminium cell anode carbon block green body, it is characterized in that by top die core, pattern insulated liner, pattern box hat, thermopair, press down core rod and power supply constitutes, pattern box hat inwall is provided with the pattern insulated liner, the inwall of top die core sidewall and pattern insulated liner fits tightly, and can two-wayly slide, thermopair passes pattern box hat and pattern insulated liner, the top die core, press down core rod and be connected with a utmost point of power supply respectively, press down core rod and comprise following two kinds of structure formations:
(1) the unidirectional laminated structure of giving: the bottom that presses down core rod has to two side-prominent structures, should contact with the lower surface of pattern box hat by outstanding structure upper surface with the pattern insulated liner, the inwall that presses down core rod sidewall and pattern insulated liner fits tightly, and the unidirectional slip of energy;
(2) the two-way laminated structure of giving: the inwall that presses down core rod sidewall and pattern insulated liner fits tightly, and can two-way slip.
2. according to the described device of producing high-density aluminium cell anode carbon block green body of claim 1, the material that it is characterized in that the pattern insulated liner is refractory concrete or carbonitride of silicium; Top die core and press down core rod and make by forged steel.
3. adopt the described device of claim 1 to produce the method for high-density aluminium cell anode carbon block green body, it is characterized in that:
At first prepare anode paste, the anode paste proportioning by mass percentage, after-smithing petroleum coke 55～90%, carbon anode anode scrap are 0～30%, all the other are coal-tar pitch;
Place the bottom of die cavity with pressing down core rod, the top die core is proposed die cavity, pour in the die cavity mixing the anode paste of pinching; With the top die core be pressed in anode paste above, then by the top die core with press down core rod antianode thickener and exert pressure, simultaneously with electric current by the top die core with press down core rod and import anode paste in the die cavity, the anode paste of being pressed be heated simultaneously and pressurize;
When anode paste be heated to 150～250 ℃, when applied pressure reaches 40～70MPa, keep this pressure to cut off electric current in 30～100 seconds afterwards, and relief pressure, with the top die core with press down core rod and propose, and pattern box hat, pattern insulated liner and molded anode green compact are moved on in the stripper together, the anode green compact that are compacted in the die cavity are deviate to become the carbon anode green compact in die cavity; Perhaps after cutting off electric current and relief pressure, will press down core rod and shift out, on the top die core, exert pressure then, anode green compact molded in the die cavity will be extruded.
4. according to the described method of producing high-density aluminium cell anode carbon block green body of claim 3, the size composition that it is characterized in that the anode paste aggregate is four grade prescriptions, wherein the coarse grain granularity is 9.00～15.00mm, and middle grain granularity is 4.00～8.99mm, and the particulate granularity is 0.15～3.99mm, powder granularity 0.01～0.14mm, according to the mass percent meter, wherein the coarse grain aggregate is 5～20%, and middle grain aggregate is 5～30%, fine particle aggregate is 10～40%, and all the other are the powder aggregate.
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| CN2010101001728A CN101748441B (en) | 2010-01-25 | 2010-01-25 | Method and device for preparing high-density aluminium cell anode carbon block green body |
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| CN2010101001728A CN101748441B (en) | 2010-01-25 | 2010-01-25 | Method and device for preparing high-density aluminium cell anode carbon block green body |
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| CN101748441B true CN101748441B (en) | 2011-03-16 |
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| CN108221003B (en) * | 2018-02-12 | 2019-03-29 | 内蒙古霍煤通顺碳素有限责任公司 | A kind of optimization prebaked anode for aluminium electrolysis formula |
| CN108658597A (en) * | 2018-05-15 | 2018-10-16 | 昆明冶金高等专科学校 | A kind of plasma activated sintering preparation method of carbon anode |
| CN112010651A (en) * | 2020-09-08 | 2020-12-01 | 四川大学 | Anode material forming and roasting integrated preparation equipment and preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005045754B3 (en) * | 2005-09-23 | 2006-12-14 | Heinz Caspelherr | Device for charging a jolt-ramming machine for making carbon anodes for the aluminum industry comprises a feed container mounted above a molding box and a rack that can be displaced horizontally above the feed container |
| CN101285202A (en) * | 2007-04-09 | 2008-10-15 | 兴和县木子炭素有限责任公司 | Preparation method for moulding fine structure graphite anode |
| CN201136206Y (en) * | 2007-12-14 | 2008-10-22 | 沈阳博瑞达工程有限公司 | Safety installation for anodic vibration molding machine |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005045754B3 (en) * | 2005-09-23 | 2006-12-14 | Heinz Caspelherr | Device for charging a jolt-ramming machine for making carbon anodes for the aluminum industry comprises a feed container mounted above a molding box and a rack that can be displaced horizontally above the feed container |
| CN101285202A (en) * | 2007-04-09 | 2008-10-15 | 兴和县木子炭素有限责任公司 | Preparation method for moulding fine structure graphite anode |
| CN201136206Y (en) * | 2007-12-14 | 2008-10-22 | 沈阳博瑞达工程有限公司 | Safety installation for anodic vibration molding machine |
Non-Patent Citations (2)
| Title |
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| 李圣华.碳和石墨制品的用途和生产.《炭素技术》.1985,(第05期),28-35. * |
| 李永军等.铝电解槽用无烟煤基石墨化阴极材料的初步研究.《炭素技术》.2006,第25卷(第3期),1-5. * |
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