CN101705503A - Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath - Google Patents
Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath Download PDFInfo
- Publication number
- CN101705503A CN101705503A CN200910219827A CN200910219827A CN101705503A CN 101705503 A CN101705503 A CN 101705503A CN 200910219827 A CN200910219827 A CN 200910219827A CN 200910219827 A CN200910219827 A CN 200910219827A CN 101705503 A CN101705503 A CN 101705503A
- Authority
- CN
- China
- Prior art keywords
- refractory brick
- age
- draught animal
- cathode block
- grooved
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The invention relates to a method for preventing aluminium leakage from the side parts and the bottom part of an aluminium electrolysis bath. The method comprises the following steps: firstly teeth are respectively processed at four edges of the top part of each cathode carbon block, then the cathode carbon blocks are arranged on the electrolysis bath to implement tamping of carbon paste in seams between the slopes of the edge parts and the cathode carbon blocks; when the carbon paste surfaces are tamped to the bottom surfaces of the teeth at the peripheries of the cathode carbon blocks and are on the same plane with the bottom edges of the teeth, the teeth at the peripheries of the cathode carbon blocks close to the bath ledges are provided with a ring of refractory bricks or bath-shaped refractory bricks; and a refractory brick or a bath-shaped refractory brick is arranged on the teeth of the middle seam of every two adjacent cathode carbon blocks; and a carbon tamping paste slope is rammed between the side surfaces of the carbon blocks at the edge parts for placing the refractory brick or the bath-shaped refractory brick and the carbon blocks at the edge parts thereof, and a layer of refractory-material board is bonded on a position close to the upper surface of the slope after the slope tamping is finished. The method can avoid the aluminium leakage in cracks caused by tamping paste on artificial extending legs, bewteen the artificial extending legs and the cathode carbon blocks and between two adjacent cathode carbon blocks.
Description
Technical field
The invention belongs to the aluminum electrolysis technology field, be specifically related to prevent that aluminium cell from leaking the method for aluminium.
Background technology
At present, commercial-purity aluminium all is to adopt the method for fused salt electrolysis to produce, the major equipment that fused salt electrolysis process is used is an electrolyzer, outside aluminum cell is a steel casing, inside is mainly the carbonaceous material liner, be refractory materials and lagging material between carbon lining and the steel pot shell, the bottom of electrolyzer is equipped with the carbon piece of conduction rod iron for its bottom, this carbon piece is called cathode block, the piece that the sidepiece of electrolyzer is generally also made by carbon materials constitutes, what have also constitutes with the silicon carbide brick of silicon nitride bonded silicon, and the slope of making firm by ramming with the carbon element paste usually between sidewall carbon brick and the bottom carbon piece is connected, and is commonly referred to as artificial stretching one's legs.
After cell lining lays, need carry out preheating and baking to cell lining, the purpose of preheating and baking mainly is the moisture content of driving away in the cell lining, and carries out electrobath start after making cell lining reach certain temperature.Ramming paste between the slope (artificial stretching one's legs) of making firm by ramming with the carbon element ramming paste between sidewall carbon brick and the bottom carbon piece and two the adjacent bottom carbon pieces, can be along with the rising of temperature in the roasting process, carbon element is stuck with paste the decomposition of medium pitch and is shunk, therefore in roasting process, produce the crack in meeting between carbon element ramming paste inside and carbon element ramming paste and the cathode block, particularly be easy to generate bigger crack between carbon element ramming paste and the bottom cathode carbon piece, can leak into the bottom of cathode block by these cracks when the aluminium liquid of negative electrode behind the electrobath start or in normal productive process, and the fusing cathode steel bar, this is a major cause that causes the electrolyzer early damage.
Summary of the invention
At existing aluminium cell in roasting process, artificially stretch one's legs, artificial stretch one's legs and cathode block between ramming paste and adjacent two cathode blocks between be easy to generate the problem that causes leaking aluminium than large fracture, the invention provides a kind of aluminum cell side and bottom of preventing and leak the method for aluminium, reach avoid from artificially stretch one's legs, artificial stretch one's legs and cathode block between and the purpose of leaking aluminium the crack that ramming paste produced between adjacent two cathode blocks.
Method of the present invention is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 3～8cm, wide 3～6cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 3～6cm, wide 2～3cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 3～6cm, wide 2～3cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 3～8cm, wide a 3～6cm near the top edge of the periphery of ledge.Wide 10～20cm, high 2～3cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a circle refractory brick or put a ring recess type refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each refractory brick or grooved refractory brick is 6～12cm, height is 3～8cm, put refractory brick or grooved refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this refractory brick or grooved refractory brick is 8～12cm, height is that 3～8cm. also lays refractory brick or grooved refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, the width of refractory brick or grooved refractory brick, width and the length of length and the age of a draught animal are consistent, the high 3～8cm. of height of the aspect ratio age of a draught animal of refractory brick or grooved refractory brick
Above grooved refractory brick is at groove of common refractory brick one side processing, a kind of mixed material of pinching on the prior ramming in the groove.This mixture is that the mixture of aluminum oxide and sodium aluminum fluoride and sodium aluminate solution or water glass solution (sodium silicate solution) or water mix to pinch and forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and sodium aluminate solution or water glass solution or water are binding agent.The cell wall of grooved refractory brick is thick to be 1～2cm.As shown in Figure 6.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1 in the above-mentioned aggregate: (0.025～0.3); The binding agent add-on is 3～15% (mass percents) of aggregate, and naoh concentration is 100～300g/L in the sodium aluminate solution, and the concentration of aluminium hydroxide is 20～300g/L; Sodium silicate solution mesosilicic acid na concn is 100～300g/L.
More than used refractory brick or grooved refractory brick be magnesia fire-protecting wall or rhombspar refractory brick.
(3) after putting into refractory brick or grooved refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing refractory brick or grooved refractory brick and limit portion carbon piece.Be close to the magnesia or dolomite refractory plate of upper surface bonding one deck on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 1～5cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
In the roasting aluminum electrolytic bath process, even artificial sidepiece is stretched one's legs and bottom cathode carbon piece between produce the crack, but because refractory brick is expansible in roasting process, itself can't crack, and start after roasting finishes and pour into when producing aluminium water in aluminium water or the electrolyzer, sodium aluminum fluoride below block refractory brick or the grooved refractory brick and aluminum oxide can stop that the crack that forms after aluminium water is by roasting flows into bottom land fusing rod iron, avoids causing the electrolyzer early damage.After electrobath start got up, the very high inevitable meeting of the temperature of ionogen and aluminium liquid semi-molten state occurred or partly solidifies the ionogen of attitude in the limit of electrolyzer portion with above the cell wall refractory brick.In the long process, these ionogen also can react with refractory brick, and corroded by ionogen, formation contains the mixture of the refractory materials that is not etched, the refractory materials that has been etched and electrolyte melt, these mixtures can exist in long-time, and continue to stop that aluminium water leaks aluminium from side seam, prevent the early damage of electrolyzer.In addition, the Monofrax plate of the artificial upper surface of stretching one's legs can play the effect that artificial stove is helped, it forms artificial burner hearth with the fire sand brick of sidepiece, and this artificial burner hearth can reduce the horizontal current of electric leakage of electrolyzer sidepiece and aluminium liquid, helps the raising of electrolytic cell currents efficient.Therefore, adopt the inventive method, can avoid from artificially stretch one's legs, artificial stretch one's legs and cathode block between and leak aluminium the crack that ramming paste produced between adjacent two cathode blocks.
Description of drawings
Fig. 1 is provided with the electrolysis trough side part slope of refractory brick and the structural representation of bottom carbon piece for the cathode block age of a draught animal of the inventive method processing;
Fig. 2 is provided with the electrolysis trough side part slope of grooved refractory brick and the structural representation of bottom carbon piece for the cathode block age of a draught animal of the inventive method processing;
Fig. 3 has the structural representation of refractory brick for the carbon element ramming paste surface between adjacent two cathode blocks of the inventive method processing;
Fig. 4 has the structural representation of grooved refractory brick for the carbon element ramming paste surface between adjacent two cathode blocks of the inventive method processing;
Fig. 5 is the structural representation front view of grooved refractory brick of the present invention;
Fig. 6 is the structural representation upward view of grooved refractory brick of the present invention;
The cathode block age of a draught animal that Fig. 7 processes for the inventive method is provided with the electrolyzer vertical view of refractory brick.
Among the figure: 1. insulating material, 2. sidepiece box hat, 3. pouring fireproof material, 4. cathode steel bar, 5. sidewall carbon brick or fire sand brick, 6. carbon element ramming paste slope (artificial stretching one's legs), 7. refractory plate, 8. refractory brick, 9. bottom land lagging material, 10 bottom land box hats, 11. cathode block, 12. grooved refractory brick, the mixed material of pinching of 13. aluminum oxide and sodium aluminum fluoride, 14. centre joint carbon element ramming paste, 15. anodes.
Embodiment
As shown in Figure 1, this electrolyzer has bottom land box hat 10, and the bottom land box hat is provided with bottom land lagging material 9, and the outside of electrolyzer is a sidepiece box hat 2, and insulating material 1 is close to sidepiece box hat 2 and bottom land box hat 10 inwalls.Pouring fireproof material 3 is arranged on cathode steel bar top, cathode block sidepiece.A plurality of cathode blocks 11 constitute electric tank cathode in the electrolyzer, and electric tank cathode rod iron 4 is connected by carbon element ramming paste slope 6 with sidewall carbon brick or fire sand brick 5, and cathode block 11 is connected with external power source by cathode steel bar 4.The present invention has laid a refractory brick 8 on the top of electrolysis trough side part slope and cathode block junction, and the refractory plate 7 of or rhombspar matter magnesia at upper surface bonding one deck of being close to the slope.In the process of roasting aluminum electrolytic bath and production, along with the contraction meeting of ramming paste produces the crack in the carbon element ramming paste, aluminium liquid can leak into the early damage that electrolyzer is caused in negative electrode inside by these cracks, and refractory brick 8 and refractory plate 7 can play the effect that prevents aluminium liquid seepage, prevents the aluminium cell early damage.On the age of a draught animal at the cathode block middle part under two row's anodes, 15 centres joint, also lay a refractory brick.
As shown in Figure 2, different with Fig. 1 is that blocky refractory brick 8 has changed grooved refractory brick 12 into, and the inside of grooved refractory brick 12 is placed with the mixed material 13 of pinching of aluminum oxide and sodium aluminum fluoride, and the mixed material 13 of pinching of this aluminum oxide and sodium aluminum fluoride plays the effect that better prevents aluminium liquid seepage after refractory brick weathers.
As shown in Figure 3, electric tank cathode is to be combined by a lot of piece cathode blocks, every two adjacent cathode blocks connect by the carbon element ramming paste, lay a refractory brick on the top of two adjacent negative electrode centres joint, this refractory brick can prevent that aluminium liquid seepage from entering the negative electrode centre joint in the roasting and starting aluminum electrolytic cell process.
As shown in Figure 4, lay a grooved refractory brick, be provided with centre joint carbon element ramming paste 14 at two cathode block intermediary centres joint on the top of two adjacent negative electrode centres joint.
The method that prevents aluminum cell side and bottom leakage aluminium is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 5cm, the wide 4.5cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 4.5cm, wide 2.5cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 4.5cm, wide 2.5cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 5cm, a wide 4.5cm near the top edge of the periphery of ledge.Wide 15cm, high 2.5cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a circle refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each refractory brick is 9cm, height is 5cm, put a refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this refractory brick is 10cm, high is that 5cm. also lays a refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, the width of refractory brick, width and the length of length and the age of a draught animal are consistent, the high 5cm. of height of the aspect ratio age of a draught animal of refractory brick
More than used refractory brick be magnesia fire-protecting wall.
(3) after putting into refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing refractory brick and limit portion carbon piece.Be close to upper surface bonding one deck magnesite refractory plate on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 3cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
The method that prevents aluminum cell side and bottom leakage aluminium is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 8cm, the wide 6cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 6cm, wide 3cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 6cm, wide 3cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 8cm, a wide 6cm near the top edge of the periphery of ledge.Wide 20cm, high 3cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a circle refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each refractory brick is 12cm, height is 8cm, put a refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this refractory brick is 12cm, and height is 8cm.Also lay a refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, width and the length of the width of refractory brick, length and the age of a draught animal are consistent, and refractory brick is than the high 8cm of height of the age of a draught animal.
More than used refractory brick or grooved refractory brick be the rhombspar refractory brick.
(3) after putting into refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing refractory brick and limit portion carbon piece.Be close to upper surface bonding one deck dolomite refractory plate on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 5cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
The method that prevents aluminum cell side and bottom leakage aluminium is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 3cm, the wide 3cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 3cm, wide 2cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 3cm, wide 2cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 3cm, a wide 3cm near the top edge of the periphery of ledge.Wide 10cm, high 2cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a circle refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each refractory brick is 6cm, height is 3cm, put a refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this refractory brick is 8cm, high is that 3cm. also lays a refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, the width of refractory brick, width and the length of length and the age of a draught animal are consistent, the high 3cm. of height of the aspect ratio age of a draught animal of refractory brick
More than used refractory brick or grooved refractory brick be magnesia fire-protecting wall.
(3) after putting into refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing refractory brick and limit portion carbon piece.Be close to upper surface bonding one deck magnesite refractory plate on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 1cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
The method that prevents aluminum cell side and bottom leakage aluminium is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 5cm, the wide 4.5cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 4.5cm, wide 2.5cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 4.5cm, wide 2.5cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 5cm, a wide 4.5cm near the top edge of the periphery of ledge.Wide 15cm, high 2.5cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a ring recess type refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each grooved refractory brick is 9cm, height is 5cm, put a grooved refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this grooved refractory brick is 10cm, and height is 5cm.Also lay a grooved refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, width and the length of the width of grooved refractory brick, length and the age of a draught animal are consistent, the high 5cm of height of the aspect ratio age of a draught animal of grooved refractory brick.
Above grooved refractory brick is at groove of common refractory brick one side processing, a kind of mixed material of pinching on the prior ramming in the groove.This mixture is that the mixture and mixed the pinching of sodium aluminate solution of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and sodium aluminate solution is a binding agent.The cell wall of grooved refractory brick is thick to be 1.5cm.As shown in Figure 6.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.1 in the above-mentioned aggregate; The binding agent add-on is 9% (mass percent) of aggregate, and naoh concentration is 200g/L in the sodium aluminate solution, and the concentration of aluminium hydroxide is 160g/L.
More than used grooved refractory brick be magnesia fire-protecting wall.
(3) after putting into grooved refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing grooved refractory brick and limit portion carbon piece.Be close to upper surface bonding one deck magnesite refractory plate on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 3cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
The method that prevents aluminum cell side and bottom leakage aluminium is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 8cm, the wide 6cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 6cm, wide 3cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 6cm, wide 3cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 8cm, a wide 6cm near the top edge of the periphery of ledge.Wide 20cm, high 3cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a ring recess type refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each grooved refractory brick is 12cm, height is 8cm, put a grooved refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this grooved refractory brick is 12cm, and height is 8cm.Also lay a grooved refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, width and the length of the width of grooved refractory brick, length and the age of a draught animal are consistent, the high 8cm of height of the aspect ratio age of a draught animal of grooved refractory brick.
Above grooved refractory brick is at groove of common refractory brick one side processing, a kind of mixed material of pinching on the prior ramming in the groove.This mixture is that the mixture and mixed the pinching of water glass solution (sodium silicate solution) of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and water glass solution is a binding agent.The cell wall of grooved refractory brick is thick to be 2cm.As shown in Figure 6.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.3 in the above-mentioned aggregate; The binding agent add-on is 15% (mass percent) of aggregate, and sodium silicate solution mesosilicic acid na concn is 200g/L.
More than used grooved refractory brick be the rhombspar refractory brick.
(3) after putting into grooved refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing grooved refractory brick and limit portion carbon piece.Be close to upper surface bonding one deck dolomite refractory plate on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 5cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
Embodiment 6
The method that prevents aluminum cell side and bottom leakage aluminium is carried out according to the following steps:
(1) at first all processes the age of a draught animal, be processed into high 3cm, the wide 3cm age of a draught animal near the limit of ledge on four limits, top of each cathode block.Every pair of age of a draught animal that high 3cm, wide 2cm are processed in the relative limit portion top of two adjacent cathode blocks, the limit portion top that two adjacent cathode blocks are relative forms the age of a draught animal of high 3cm, wide 2cm.Then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, and whole negative electrode forms the age of a draught animal of high 3cm, a wide 3cm near the top edge of the periphery of ledge.Wide 10cm, high 2cm, Baltimore groove that length is identical with the width of cathode block are processed in the middle part of every cathode block under two row's anode centres joint in addition.
(2) make firm by ramming by the carbon element paste of usual method enforcement portion slope, limit and cathode block intermediate gap, the construction of the centre joint ramming paste between limit portion slope and the cathode block is all upwards carried out from low.
When carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, according to method of the present invention, put a ring recess type refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each grooved refractory brick is 6cm, height is 3cm, put a grooved refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this grooved refractory brick is 8cm, and height is 3cm.Also lay a grooved refractory brick on the age of a draught animal at the cathode block middle part under two row's anode centres joint, width and the length of the width of grooved refractory brick, length and the age of a draught animal are consistent, the high 3cm of height of the aspect ratio age of a draught animal of grooved refractory brick.
Above grooved refractory brick is at groove of common refractory brick one side processing, a kind of mixed material of pinching on the prior ramming in the groove.This mixture is that the mixture and mixed the pinching of water of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and water is binding agent.The cell wall of grooved refractory brick is thick to be 1cm.As shown in Figure 6.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.025 in the above-mentioned aggregate; The binding agent add-on is 3% (mass percent) of aggregate.
More than used grooved refractory brick be magnesia fire-protecting wall.
(3) after putting into grooved refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing grooved refractory brick and limit portion carbon piece.Be close to upper surface bonding one deck dolomite refractory plate on slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 1cm, and its width and length are not done particular requirement, and the slit between the refractory slab is filled up with aluminum oxide.
Method steps is identical with embodiment 4, and difference is the mixed material of pinching in the grooved refractory brick groove.This mixture is that the mixture and mixed the pinching of sodium aluminate solution of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and sodium aluminate solution is a binding agent.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.1 in the above-mentioned aggregate; The binding agent add-on is 3% (mass percent) of aggregate, and naoh concentration is 300g/L in the sodium aluminate solution, and the concentration of aluminium hydroxide is 300g/L.
Method steps is identical with embodiment 4, and difference is the mixed material of pinching in the grooved refractory brick groove.This mixture is that the mixture and mixed the pinching of sodium aluminate solution of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and sodium aluminate solution is a binding agent.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.3 in the above-mentioned aggregate; The binding agent add-on is 15% (mass percent) of aggregate, and naoh concentration is 100g/L in the sodium aluminate solution, and the concentration of aluminium hydroxide is 20g/L.
Method steps is identical with embodiment 4, and difference is the mixed material of pinching in the grooved refractory brick groove.This mixture is that the mixture and mixed the pinching of sodium silicate solution of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and sodium silicate solution is a binding agent.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.1 in the above-mentioned aggregate; The binding agent add-on is 3% (mass percent) of aggregate, and sodium silicate solution mesosilicic acid na concn is 300g/L.
Method steps is identical with embodiment 4, and difference is the mixed material of pinching in the grooved refractory brick groove.This mixture is that the mixture and mixed the pinching of sodium silicate solution of aluminum oxide and sodium aluminum fluoride forms, and wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, and sodium silicate solution is a binding agent.
The mass ratio of aluminum oxide and sodium aluminum fluoride is 1: 0.3 in the above-mentioned aggregate; The binding agent add-on is 15% (mass percent) of aggregate, and sodium silicate solution mesosilicic acid na concn is 100g/L.
Claims (3)
1. one kind prevents that aluminum cell side and bottom from leaking the method for aluminium, it is characterized in that carrying out according to the following steps:
(1) at first all processes the age of a draught animal on four limits, top of each cathode block, high 3～8cm is processed on limit near ledge, wide 3～6cm age of a draught animal, high 3～6cm is processed in every pair of relative limit portion top of two adjacent cathode blocks, the age of a draught animal of wide 2～3cm, the limit portion top that two adjacent cathode blocks are relative forms high 3～6cm, the age of a draught animal of wide 2～3cm, then cathode block is placed on the electrolyzer, cathode carbon block of electrolytic bath is assembled into the whole negative electrode of electrolyzer, whole negative electrode forms high a 3～8cm near the top edge of the periphery of ledge, the age of a draught animal of wide 3～6cm, wide 10～20cm is processed in the middle part of every cathode block under two row's anode centres joint in addition, high 2～3cm, the Baltimore groove that length is identical with the width of cathode block;
(2) the carbon element paste of implementing portion slope, limit and cathode block intermediate gap is made firm by ramming, when carbon element paste face is made the basal surface of the cathode block periphery age of a draught animal firm by ramming and when the base of the age of a draught animal is on a horizontal plane, put the refractory brick of a circle common shape or put a ring recess type refractory brick in the age of a draught animal near the cathode block periphery of ledge, put refractory brick or grooved refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, on the age of a draught animal at the cathode block middle part under two row's anode centres joint, also lay refractory brick or grooved refractory brick;
(3) after putting into refractory brick or grooved refractory brick, ramming carbon element ramming paste slope between the side of the limit portion carbon piece of placing refractory brick or grooved refractory brick and limit portion carbon piece, magnesia or the dolomite refractory plate of upper surface bonding one deck of being close to the slope after the slope is made firm by ramming and finished, the thickness of this refractory slab is 1～5cm, and the slit between the refractory slab is filled up with aluminum oxide.
2. according to the described method that prevents that aluminum cell side and bottom from leaking aluminium of claim 1, it is characterized in that putting a circle refractory brick or putting a ring recess type refractory brick in the age of a draught animal near the cathode block periphery of ledge, the width of each refractory brick or grooved refractory brick is 6～12cm, height is 3～8cm, put refractory brick or grooved refractory brick on the age of a draught animal of every pair of adjacent two cathode block centres joint, the width of this bulk refractory brick or grooved refractory brick is 8～12cm, height is 3～8cm, on the age of a draught animal at the cathode block middle part under two row's anode centres joint, also lay refractory brick or grooved refractory brick, the width of refractory brick or grooved refractory brick, width and the length of length and the age of a draught animal are consistent, the high 3～8cm of height of the aspect ratio age of a draught animal of refractory brick or grooved refractory brick.
3. according to claim 1 or the 2 described methods that prevent that aluminum cell side and bottom from leaking aluminium, it is characterized in that grooved refractory brick is at groove of common refractory brick one side processing, a kind of mixed material of pinching on the prior ramming in the groove, this mixture is that the mixture of aluminum oxide and sodium aluminum fluoride and sodium aluminate solution or water glass solution or water mix to pinch and forms, wherein aluminum oxide and sodium aluminum fluoride mixture are as aggregate, sodium aluminate solution or water glass solution or water are binding agent, and the mass ratio of aluminum oxide and sodium aluminum fluoride is 1 in the aggregate: (0.025～0.3); The binding agent add-on is 3～15% of an aggregate by mass percentage, and naoh concentration is 100～300g/L in the sodium aluminate solution, and the concentration of aluminium hydroxide is 20～300g/L; Sodium silicate solution mesosilicic acid na concn is 100～300g/L; The cell wall of grooved refractory brick is thick to be 1～2cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102198270A CN101705503B (en) | 2009-11-12 | 2009-11-12 | Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102198270A CN101705503B (en) | 2009-11-12 | 2009-11-12 | Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101705503A true CN101705503A (en) | 2010-05-12 |
| CN101705503B CN101705503B (en) | 2011-08-31 |
Family
ID=42375752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102198270A Expired - Fee Related CN101705503B (en) | 2009-11-12 | 2009-11-12 | Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101705503B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060848A (en) * | 2012-12-19 | 2013-04-24 | 中南大学 | Aluminum electrolytic tank with artificial hearth |
-
2009
- 2009-11-12 CN CN2009102198270A patent/CN101705503B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060848A (en) * | 2012-12-19 | 2013-04-24 | 中南大学 | Aluminum electrolytic tank with artificial hearth |
| CN103060848B (en) * | 2012-12-19 | 2015-02-18 | 中南大学 | Aluminum electrolytic tank with artificial hearth |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101705503B (en) | 2011-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2006341952B2 (en) | Cathodes for aluminium electrolysis cell with non-planar slot design | |
| CN101724863A (en) | Aluminum electrolytic tank with novel cathode structure capable of reducing protruding abrasion of cathode | |
| CN101898242A (en) | Masonry method of permanent ladle layer by using magnesia carbon bricks | |
| CN105543896A (en) | Prebaking aluminum cell anode set structure | |
| CN101705503B (en) | Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath | |
| RU2544727C1 (en) | Lining for aluminium electrolyser having inert anodes | |
| CN201049966Y (en) | Abnormal structure cathode carbon block of aluminum electrolysis bath | |
| CN205295496U (en) | Aluminium electroloysis positive pole covering device | |
| CN101503809A (en) | Novel energy-saving aluminum cell with chamfering grooving cathode | |
| US2378142A (en) | Method for making furnaces for the electrolytic production of aluminum | |
| CN104328458A (en) | High-yield and energy-saving electrolytic furnace for rare-earth metals | |
| CN105648474B (en) | Large-scale pre-baked cell current stabilization saving construction method | |
| CN204198869U (en) | A kind of high yield and saving energy re metal electrolyzing stove | |
| CN201358306Y (en) | Novel energy-saving aluminum electrolysis bath with chamfered and grooved cathode | |
| CN201305634Y (en) | Novel cathode-structure aluminum electrolytic cell with functions of longitudinal wave reduction and horizontal wave reduction | |
| CN101306949B (en) | Charcoal blocks with semi- graphitic side part for electrolyzing aluminium and production process thereof | |
| CN207874504U (en) | A kind of large-scale refractory material prefabricated block forming die in coke oven coal filling hole | |
| CN207347602U (en) | A kind of RH rings flow tube lining brick and Integral combined structure | |
| CN203764968U (en) | Preformed part used for refined steel ladle slag line | |
| CN209491875U (en) | A kind of thermal balance zirconia-corundum refractory brick sand mold | |
| RU90074U1 (en) | ELECTROLYZER FOR PRODUCING MAGNESIUM AND CHLORINE | |
| CN217166467U (en) | Spacing ladle magnesia carbon brick | |
| CN101643914A (en) | Method for preventing cathode oxidation and aluminum leakage of aluminum electrolytic bath | |
| CN214371707U (en) | Communicated flame path of carbon anode roasting furnace | |
| CN220393785U (en) | Novel precast block of blast furnace main channel skimming device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20111112 |