CN102995057A - Cathode carbon block with planar surface or V-shaped surface and staggered carbon bowls and preparation method - Google Patents
Cathode carbon block with planar surface or V-shaped surface and staggered carbon bowls and preparation method Download PDFInfo
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- CN102995057A CN102995057A CN2012105124726A CN201210512472A CN102995057A CN 102995057 A CN102995057 A CN 102995057A CN 2012105124726 A CN2012105124726 A CN 2012105124726A CN 201210512472 A CN201210512472 A CN 201210512472A CN 102995057 A CN102995057 A CN 102995057A
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Abstract
The invention relates to a preparation method of a cathode carbon block with a planar surface or a V-shaped surface and staggered carbon bowls, belonging to the technical field of carbon for aluminum. The preparation method is performed according to the following steps: (1) blending materials: blending the materials by using a raw material formula which is the same with that of the traditional cathode carbon block; (2) mixing and molding: mixing the blended materials which are well weighed into a paste at the mixing temperature of 200-300 DEG C, tapping the paste by a vibration molding machine to form a solid with the density of 1.55-1.65g/cm<3>, and pushing out a green compact block body; (3) roasting: cooling a green compact of the cathode carbon block, which is prepared by vibration molding, and then placing into an annular cathode carbon block roasting furnace for roasting at the temperature of 1100-1250 DEG C; and (4) machining the carbon block: cooling the cathode carbon block, clearing, and then performing machining on the surface and a steel bar groove according to application size requirements. According to the method disclosed by the invention, the machining cost of the carbon bowls on the surface of a cathode is greatly reduced, the raw materials for manufacturing the cathode carbon block by a machining method can be further saved, the manufacturing process is simple, and the cost of the cathode carbon block is further reduced.
Description
Technical field
The invention belongs to aluminium charcoal element technical field, particularly a kind of surface is plane or V-arrangement face and the cathode block preparation method that staggered charcoal bowl is arranged.
Background technology
Aluminium is to produce with the method for sodium aluminum fluoride-alumina molten salt electrolysis, and electrolysis of aluminum consumes a large amount of electric energy, and occupies very large ratio in the cost of Aluminium Electrolysis, and therefore economize on electricity is the important subject that the electrolysis of aluminum worker pays close attention to all the time.The power consumption of Aluminium Electrolysis is to be determined by bath voltage and two important parameters of current efficiency.The current efficiency that reduces bath voltage and raising electrolyzer all can make the power consumption of Aluminium Electrolysis reduce.In order to improve current efficiency of aluminium cell and to reduce bath voltage, people have done a large amount of research work from each side such as the configuration of bus, electrolyzer process technologies features, have invented a lot of patented technologies.In recent years, the aluminium cell technology that the people such as Feng Naixiang have invented novel cathode structure for the stability that improves the electric tank cathode liquid aluminum was widely applied at industrial aluminum electrolysis bath, had reduced the ton aluminium energy consumption of electrolysis of aluminum.The people such as Feng Naixiang has invented again the aluminium electrolysis cell cathode carbon block that its cathode surface has stud bump on this basis.Yet the body material of this cathode block is made of full graphite matter and complete graphited carbon electrode material, abrasion resistance is poor, and making long flow path, the groove part of its upper surface is that the carbon piece with moulding and a baked regular rectangular parallelepiped processes, and the groove inwall is the thread-shaped groove, make processing more difficult, this need to process with physical process equipment, cause processing charges high, and waste a lot of starting material, cause with the cathode block cost of stud bump structure high.If use the carbon block base body of anthracite-base can reduce raw-material cost, but anthracite-base cathode block hardness is large, process more difficultly, cause the popularization of the cathode construction aluminium cell technology with cylinder shape projection to be restricted.
Summary of the invention
For the problems referred to above, to the invention provides a kind of surface be plane or V-arrangement face and cathode block of staggered charcoal bowl and preparation method thereof is arranged.Carry out according to following steps for plane or V-arrangement face and cathode block that staggered charcoal bowl is arranged and preparation method thereof on the present invention surface:
(1) batching: use and prepare burden according to the composition of raw materials identical with traditional cathode block;
(2) kneading and compacting: the batching after will weighing up is after kneading under 200-300 ℃ the kneading temperature becomes to stick with paste, and with vibrating forming machine thickener jolt ramming being become density is 1.55-1.65g/cm
3Entity; After jolt ramming is complete, mentions weight and the case mould green compact block that vibratory compaction is good and release, this green compact block just has staggered charcoal bowl for its upper surface, and charcoal bowl inwall has the green compact of the cathode carbon pieces of vertical skewed slot;
(3) roasting: put into ring type cathode charcoal roasting stove 1100-1250 ℃ of lower roasting after the cathode block green compact cooling that vibratory compaction is made;
(4) carbon piece processing: out cathode block is come out of the stove after the cooling from stoving oven, the powdered carbon and the carbon granule that adhere in cleaning surface and the charcoal bowl carry out just having obtained after the mechanical workout aluminium electrolysis cell cathode carbon block that the upper surface that can be used for building by laying bricks or stones in the electrolyzer has staggered charcoal bowl by using dimensional requirement with surperficial and steel bar trough;
Described cathode carbon pieces upper surface is plane or V-arrangement face, and upper surface has 7-21 inwall that the charcoal bowl of vertical skewed slot is arranged, and minute is listed in carbon piece upper surface longitudinal direction medullary ray both sides by two rows, and one-tenth is staggered, and the degree of depth of charcoal bowl is 50-70mm, diameter 190-250mm; When the carbon piece wider width used, the charcoal bowl of cathode block upper surface can become at the longitudinal direction of carbon piece upper surface 3 rows to arrange, 4-7 charcoal bowl of every row, middle row's charcoal bowl is on the medullary ray of cathode block upper surface, other two rows divide the both sides that are listed in medullary ray charcoal bowl, and three row's charcoal bowls are mutually staggered and arrange on the longitudinal direction of carbon piece upper surface.
Described vibrating forming machine top weight is equipped with the projection that there is vertical inclination fin in its outside corresponding with cathode surface charcoal bowl size and position.
The present invention uses and prepares burden according to raw material and the prescription identical with the making method of traditional cathode carbon pieces.
The batching that will weigh up in kneading and compacting process kneading under 200-300 ℃ kneading temperature becomes to stick with paste; Then thickener is poured in the case mould of vibrating forming machine; The thickener of pouring in the case mould is raked with harrowing to collude, then put down weight, vibrating forming machine top weight is equipped with the projection corresponding with cathode surface charcoal bowl size and position; Open vibrating forming machine, under the pressure of the vibration of the high-power high-frequency rate of vibratory compaction machine platform and top weight, making thickener jolt ramming in the case mould on the vibratory compaction machine platform become density is 1.55-1.65g/cm
3Entity, after jolt ramming is complete, mentions weight and case mould green compact block that vibratory compaction is good and release, this green compact block just has the green compact of the cathode carbon pieces of staggered charcoal bowl for its upper surface.
Adopt the upper surface of method preparation of the present invention to be plane or V-arrangement face and staggered charcoal bowl is arranged, charcoal bowl inwall has the cathode block of vertical skewed slot, the cup-shaped charcoal bowl of its cathode block upper surface is directly produced in the cathode block moulding process, do not need again the cathode block surface after thermal treatment to carry out mechanical workout, this not only makes the processing charges of cathode surface charcoal bowl greatly reduce, and saved the raw material of making cathode block of machining process, the making flow process is simple, thereby makes the cost of cathode block.
Description of drawings
Fig. 1 is that the surface of embodiments of the invention 1 is plane or V-arrangement face and the structural representation that the cathode block of staggered charcoal bowl is arranged.
Fig. 2 is the A-A sectional view of Fig. 1,
Fig. 3 is the B-B sectional view of Fig. 1,
Fig. 4 is that the surface of embodiments of the invention 2 is plane or V-arrangement face and the structural representation that the cathode block of staggered charcoal bowl is arranged,
Fig. 5 is the A-A sectional view of Fig. 4,
Fig. 6 is the B-B sectional view of Fig. 4.
Fig. 7 is the enlarged view of the charcoal bowl among Fig. 1 ~ Fig. 6.
1 is the cathode block matrix among the figure, and 2 is the charcoal bowl of cathode block upper surface, and 3 is the steel bar trough of cathode bottom, and 4 is the vertical skewed slot on the charcoal bowl inwall.
Embodiment
Embodiment 1
A kind of surface be plane and the cathode block with the staggered charcoal bowl of two rows as shown in Figure 1, Fig. 2 is the A-A sectional view of Fig. 1, Fig. 3 is the B-B sectional view of Fig. 1.1 is the matrix of cathode block among the figure, and the width of charcoal piece matrix is less than 700mm, and the charcoal bowl 2 of carbon piece upper surface has two rows, and totally 10, charcoal bowl inwall has vertical skewed slot.The both sides of the medullary ray of two row's charcoal bowls on the longitudinal direction of the upper surface of cathode block are staggered arranges,
The making method of this cathode block is as follows:
At first take by weighing identical hard coal aggregate with existing cathode block making method and pitch, the add-on of pitch is 18% of hard coal aggregate quality, in the hard coal aggregate by mass percentage 4 ~ 12mm granularity account for 15%, 2 ~ 4mm granularity account for 30% ,-0.075mm fine powder accounts for 55%.The batching kneading under 200 ℃ kneading temperature that weighs up is become cathode paste, then cathode paste is poured in the case mould of vibrating forming machine; The thickener of pouring in the case mould is colluded and rakes with rake, then put down weight, vibrating forming machine top weight be equipped with 10 corresponding with cathode surface charcoal bowl size and position, surperficial with the vertical projection of inclination fin; Open vibrating forming machine, under the pressure of the vibration of the high-power high-frequency rate of vibratory compaction machine platform and top weight, make the thickener jolt ramming in the case mould on the vibratory compaction machine platform become density at 1.60g/cm
3Entity.After jolt ramming is complete, mentioning weight and the case mould cathode carbon pieces green compact block that vibratory compaction is good releases, this green compact block just has staggered charcoal bowl for its upper surface, charcoal bowl inwall has the cathode carbon pieces green compact of vertical skewed slot, put into ring type cathode charcoal roasting stove after the cooling of this charcoal block green body and make its roasting temperature at 1100 ℃, come out of the stove the cooling after, the powdered carbon and the carbon granule that adhere in cleaning surface and the charcoal bowl, press the industrial application dimensional requirement with surface working, and process steel bar trough, just obtained to be applied to afterwards the cathode block of aluminium cell.
Embodiment 2
A kind of surface be V-arrangement face and the cathode block with the staggered charcoal bowl of two rows vertical view as shown in Figure 4, Fig. 5 is the A-A face sectional view of Fig. 4, Fig. 6 is the B-B face sectional view of Fig. 4.1 is the matrix of cathode block among the figure, and the charcoal bowl 2 of carbon piece upper surface has two rows, 5 of every rows, and totally 10, charcoal bowl inwall has vertical skewed slot.Two row's inwalls have vertical skewed slot charcoal bowl to be staggered arrangement in the medullary ray both sides of the longitudinal direction of the upper surface of cathode block.
The making method of this cathode block is:
At first take by weighing identical hard coal aggregate with existing cathode block making method and pitch, the add-on of pitch is 17% of hard coal aggregate quality, in the hard coal aggregate by mass percentage 4 ~ 12mm granularity account for 16%, 2 ~ 4mm granularity account for 25%, the granularity of 1 ~ 2mm accounts for 9%, the fine powder of-0.075mm accounts for 50%, and the batching kneading under 300 ℃ kneading temperature that weighs up is become cathode paste, then cathode paste is poured in the case mould of vibrating forming machine; The thickener of pouring in the case mould is raked with harrowing to collude, then put down weight, vibrating forming machine top weight is equipped with 10 surfaces corresponding with cathode surface charcoal bowl size and position with the projection of vertical inclination fin; Open vibrating forming machine, under the pressure of the vibration of the high-power high-frequency rate of vibratory compaction machine platform and top weight, make the thickener jolt ramming in the case mould on the vibratory compaction machine platform become density at 1.65g/cm
3Entity.After jolt ramming is complete, mentioning weight and the case mould cathode carbon pieces green compact block that vibratory compaction is good releases, this green compact block just has the green compact of the cathode carbon pieces of staggered charcoal bowl for its upper surface, put into ring type cathode charcoal roasting stove after the cooling of this charcoal block green body and make its roasting temperature at 1250 ℃, come out of the stove the cooling after, the powdered carbon and the carbon granule that adhere in cleaning surface and the charcoal bowl, press the industrial application dimensional requirement with surface working, and process steel bar trough, just obtained to be applied to afterwards the cathode block of aluminium cell.
A kind of surface is plane and the cathode block with the staggered charcoal bowl of 3 rows, the width of charcoal piece matrix is greater than 700mm, the charcoal bowl of carbon piece upper surface has 3 rows, totally 15, middle row's charcoal bowl is on the medullary ray of cathode block upper surface, other two rows divide the both sides that are listed in medullary ray charcoal bowl, and three row's charcoal bowls are staggered mutually on the longitudinal direction of carbon piece upper surface arranges, and charcoal bowl inwall has vertical skewed slot.
The making method of this cathode block is as follows:
At first take by weighing identical hard coal aggregate with existing cathode block making method and pitch, the add-on of pitch is 17% of hard coal aggregate quality, in the hard coal aggregate by mass percentage 4 ~ 12mm granularity account for 15%, 2 ~ 4mm granularity account for 30%, the granularity of 1 ~ 2mm accounts for 10%, the fine powder of-0.075mm accounts for 45%, and the batching kneading under 250 ℃ kneading temperature that weighs up is become cathode paste, then cathode paste is poured in the case mould of vibrating forming machine; The thickener of pouring in the case mould is colluded and rakes with rake, then put down weight, vibrating forming machine top weight be equipped with 15 corresponding with cathode surface charcoal bowl size and position, surperficial with the vertical projection of inclination fin; Open vibrating forming machine, under the pressure of the vibration of the high-power high-frequency rate of vibratory compaction machine platform and top weight, make the thickener jolt ramming in the case mould on the vibratory compaction machine platform become density at 1.65g/cm
3Entity.After jolt ramming is complete, mentioning weight and the case mould cathode carbon pieces green compact block that vibratory compaction is good releases, this green compact block just has staggered charcoal bowl for its upper surface, charcoal bowl inwall has the green compact of the cathode carbon pieces of skewed slot, put into ring type cathode charcoal roasting stove after the cooling of this charcoal block green body and make its roasting temperature at 1200 ℃, come out of the stove the cooling after, the powdered carbon and the carbon granule that adhere in cleaning surface and the charcoal bowl, press the industrial application dimensional requirement with surface working, and process steel bar trough, just obtained to be applied to afterwards the cathode block of aluminium cell.
Claims (2)
1. the surface is plane or V-arrangement face and cathode block and the preparation method that staggered charcoal bowl is arranged, and its feature may further comprise the steps:
(1) batching: use and prepare burden according to the composition of raw materials identical with traditional cathode block;
(2) kneading and compacting: the batching after will weighing up is after kneading under 200-300 ℃ the kneading temperature becomes to stick with paste, and with vibrating forming machine thickener jolt ramming being become density is 1.55-1.70g/cm
3Entity; After jolt ramming is complete, mentions weight and the case mould green compact block that vibratory compaction is good and release, this green compact block just has staggered charcoal bowl for its upper surface, and charcoal bowl inwall has the green compact of the cathode carbon pieces of vertical skewed slot;
(3) roasting: put into ring type cathode charcoal roasting stove 1100-1250 ℃ of lower roasting after the cathode block green compact cooling that vibratory compaction is made;
(4) carbon piece processing: out cathode block is come out of the stove after the cooling from stoving oven, the powdered carbon and the carbon granule that adhere in cleaning surface and the charcoal bowl carry out just having obtained after the mechanical workout aluminium electrolysis cell cathode carbon block that the upper surface that can be used for building by laying bricks or stones in the electrolyzer has staggered charcoal bowl by using dimensional requirement with surperficial and steel bar trough;
Described cathode carbon pieces upper surface is plane or V-arrangement face, and upper surface has 7-21 inwall that the charcoal bowl of vertical skewed slot is arranged, and minute is listed in carbon piece upper surface longitudinal direction medullary ray both sides by two rows, and one-tenth is staggered, and the degree of depth of charcoal bowl is 50-70mm, diameter 190-250mm; When the carbon piece wider width used, the charcoal bowl of cathode block upper surface can become at the longitudinal direction of carbon piece upper surface 3 rows to arrange, 4-7 charcoal bowl of every row, middle row's charcoal bowl is on the medullary ray of cathode block upper surface, other two rows divide the both sides that are listed in medullary ray charcoal bowl, and three row's charcoal bowls are mutually staggered and arrange on the longitudinal direction of carbon piece upper surface.
2. upper surface according to claim 1 is plane or V-arrangement face and the cathode block preparation method that staggered charcoal bowl is arranged, and it is characterized in that described vibrating forming machine top weight is equipped with the projection that there is vertical inclination fin in its outside corresponding with cathode surface charcoal bowl size and position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210512472.6A CN102995057B (en) | 2012-12-05 | 2012-12-05 | Surface is for plane or V-arrangement face and have cathode block and the preparation method of staggered charcoal bowl |
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| CN201210512472.6A CN102995057B (en) | 2012-12-05 | 2012-12-05 | Surface is for plane or V-arrangement face and have cathode block and the preparation method of staggered charcoal bowl |
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| CN102995057B CN102995057B (en) | 2015-09-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105420758A (en) * | 2015-12-01 | 2016-03-23 | 宁夏宁平炭素有限责任公司 | Preparing method for whole-coal carbon block cathodes |
| CN107268034A (en) * | 2017-06-15 | 2017-10-20 | 山西亮宇炭素有限公司 | A kind of cathode carbon pieces of suitable phosphorus pig iron casting and preparation method thereof |
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2012
- 2012-12-05 CN CN201210512472.6A patent/CN102995057B/en not_active Expired - Fee Related
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| CN105420758A (en) * | 2015-12-01 | 2016-03-23 | 宁夏宁平炭素有限责任公司 | Preparing method for whole-coal carbon block cathodes |
| CN107268034A (en) * | 2017-06-15 | 2017-10-20 | 山西亮宇炭素有限公司 | A kind of cathode carbon pieces of suitable phosphorus pig iron casting and preparation method thereof |
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