CN204959052U - Carbon anode twin furnace system of preheating for electrolytic aluminum - Google Patents

Carbon anode twin furnace system of preheating for electrolytic aluminum Download PDF

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Publication number
CN204959052U
CN204959052U CN201520499180.2U CN201520499180U CN204959052U CN 204959052 U CN204959052 U CN 204959052U CN 201520499180 U CN201520499180 U CN 201520499180U CN 204959052 U CN204959052 U CN 204959052U
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China
Prior art keywords
carbon anode
flue gas
preheating
waste gas
anode
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CN201520499180.2U
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Chinese (zh)
Inventor
冯明杰
张�林
王恩刚
冯慧聪
胡顺涛
赵忠满
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Northeastern University China
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Northeastern University China
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Abstract

The utility model provides a preheat that carbon anode twin furnace system of preheating for electrolytic aluminum, on the mainly used carbon anode before the electrolysis trough. The utility model discloses when satisfying the carbon anode and preheat needs, can effectively reduce the temperature difference between positive pole charcoal piece and the electrolyte, the positive pole charcoal piece avoiding resulting in because of the temperature difference crackle appears or the ruptured circumstances takes place to reduce the invalid consumption of positive pole charcoal piece, improve electrolysis aluminium production's security. The utility model discloses a preheater combustion gas carries out recycle in can emiting into the room of adjusting the temperature, and reduce cost just realizes energy saving and emission reduction, waste gas and the high temperature flue gas in the room of adjusting the temperature mix form mix the flue gas after, oxygenous hardly in mixing the flue gas, when mixing the flue gas and carry out the heat exchange and preheat the carbon anode, can effectively avoid positive pole charcoal block list face to take place oxidation phenomenon, at the indoor mixing ratio that adjusts the temperature, can realize swaing mixed flue gas temperature adjustment in the greenhouse through adjusting waste gas and high temperature flue gas to the realization is to the preheating temperature's of carbon anode accurate control.

Description

A kind of electrolgtic aluminium carbon anode twin furnace pre-heating system
Technical field
The utility model belongs to aluminum electrolysis technology field, particularly relates to a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system, is mainly used in the preheating before carbon anode By Electrolysis groove.
Background technology
Carbon anode is as the main element of aluminium cell, it is installed on the top of electrolyzer usually, in the bottom of carbon anode, anode carbon block is installed, anode carbon block is for invading in the electrolytic solution of high-temperature fusion, can by powerful iontophoresis electrolytic solution, and also participate in the electrolytic reaction of aluminium directly with the part of electrolyte contacts, in the electrolytic reaction process of aluminium, anode carbon block is constantly consumed and is finally converted into CO and CO 2, simultaneous oxidation aluminium is reduced to metallic aluminium.Generally, often produce 1 ton of metallic aluminium, consumption charcoal amount is about 450 ~ 550kg, and the per day consumption 1 ~ 2cm of anode carbon block, the replacement cycle is generally 18 ~ 28 days.
Carbon anode assembles primarily of anode rod, steel pawl and anode carbon block etc., anode rod generally forms with one-level aluminium or aluminum magnesium alloy cast, length is about 2000 ~ 2200mm, anode rod cross section is rectangle, size is determined by the size of current by anode rod, and general current density is 30 ~ 40A/cm 2, the conducting surface that anode rod contacts with the large bus of level need, through mechanical workout, require straight and smooth; Steel pawl is the steel casting of ZG25 material, and according to the number of anode carbon block quantity, steel pawl can be divided into 3 pawl heads, 4 pawl heads or 6 pawls first-class, and pawl head linearly or rectangular arranged; Anode carbon block mainly with after-smithing petroleum coke or pitch coke for aggregate, and be binding agent with coal-tar pitch, then obtained by kneading, shaping and roasting successively.For the electrolyzer of modern structure, the height of the anode carbon block be suitable for is 540 ~ 600mm, and resistivity is 50 ~ 60 μ Ω m, and ultimate compression strength is 40 ~ 55MPa, and bending strength is 8 ~ 12MPa, and volume density is about 1.5 ~ 1.6g/cm 3, true density is about 2.05 ~ 2.10g/cm 3, thermal conductivity is 3.0 ~ 4.5W/mk.Leave at the upper surface of anode carbon block conducting direction that 2 ~ 4 diameters are 160 ~ 180mm, the degree of depth is the circular groove of 80 ~ 110mm, be commonly called as charcoal bowl, and charcoal bowl is used to lay steel pawl.
Before carbon anode By Electrolysis groove, need anode rod, steel pawl and anode carbon block by weld and the mode of the phosphorus pig iron of casting is assembled into one, wherein, be connected by the aluminum steel welding block that explodes between anode rod with steel pawl, or directly anode rod and steel pawl are exploded be connected after weld; To sand washing be carried out before the assembling of steel pawl and graphitization slurry, steel pawl can be prevented to be corroded, and improve the contact condition of steel pawl and cast iron, reduce the volts lost of contact surface, be conducive to the decylization operation of phosphorus pig iron when anode rod recycles; Before the casting phosphorus pig iron, the steel pawl welded with anode rod need be heated to certain temperature, to remove the moisture on steel pawl surface, and then steel pawl put in the anode carbon block charcoal bowl cleaned out, and by casting molding machine to the quantitative casting phosphorus pig iron in charcoal bowl, and then steel pawl and anode carbon block are combined.
In traditional processing technology, the carbon anode assembled just directly is installed on electrolyzer without preheating, now anode carbon block temperature is only envrionment temperature, and electrolytical temperature can up to 960 DEG C, it is inner that powerful hot-fluid can import charcoal block into by the bottom of anode carbon block, anode carbon block inside (especially bight) near now contacting with ionogen just can produce very large temperature head, thermal stresses also produces thereupon, when thermal stresses exceedes the breaking tenacity of anode carbon block, anode carbon block just there will be crackle or breaks, even there is falling block in serious, thus cause the increase of distribution of current degree of irregularity in anode carbon block further, the electromagnetic field in electrolyzer is made to occur larger fluctuation, and then cause the fluctuation of aluminium liquid, when metal wave large to a certain extent time, the fluctuation of electrolytic solution will be transformed into, thus, by the shell causing electrolytic solution to wash away anode carbon block, and the heat exchange further between aggravation electrolytic solution and anode carbon block, thus cause vicious cycle.The winter appearing at the north cold of above-mentioned situation seems more outstanding, not only makes the consumption degree of anode carbon block increase considerably, also threatens the safety of electrolyzer greatly.
In order to avoid the appearance of above-mentioned situation, the temperature head between electrolytic solution and anode carbon block must be reduced, therefore, need one badly and can meet carbon anode before By Electrolysis groove, carbon anode is carried out to the Apparatus and method for of preheating.
Utility model content
For prior art Problems existing, the utility model provides a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system, the preheating needs of carbon anode before By Electrolysis groove can be met, temperature head between effective reduction anode carbon block and electrolytic solution, crackle or the situation of breaking occur to avoid the anode carbon block caused because of temperature head to occur, reduce the effective consumption of anode carbon block, improve the security of Aluminum Electrolysis Production simultaneously.
To achieve these goals, the utility model adopts following technical scheme: a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system, comprise flue gas and generate stove and preheating oven, generate on stove at described flue gas and be respectively arranged with burner and exhanst gas outlet, the flue gas that described burner is arranged on exhanst gas outlet opposite generates on stove furnace wall, and the burner hearth that smoke outlet and the flue gas of burner generate stove is connected; In described preheating oven, be respectively arranged with preheating chamber and exhaust air chamber, described preheating chamber is connected by gap with between exhaust air chamber; The furnace wall of described preheating chamber is provided with heat smoke spout, and the exhanst gas outlet that heat smoke spout generates stove with flue gas is connected; The furnace bottom of described preheating chamber is provided with conveyor roller, and conveyor roller is driven by drive-motor, for placing carbon anode on conveyor roller; The preheating oven that described conveyor roller inlet end is corresponding is provided with carbon anode feeding mouth, and the preheating oven that conveyor roller discharge end is corresponding is provided with carbon anode discharge port; The furnace wall of described exhaust air chamber is provided with waste gas outlet, and waste gas outlet is connected with chimney.
Described burner is respectively arranged with air intlet and fuel gas inlet, the external gas blower of described air intlet, the external fuel gas source of described fuel gas inlet.
Between described exhanst gas outlet and heat smoke spout, be provided with tempering room, between tempering room and heat smoke spout, be provided with smoke evacuation booster fan.
Between described waste gas outlet and chimney, be provided with waste gas exhaust blower fan, air outlet one tunnel of waste gas exhaust blower fan is connected with chimney, and another road of the air outlet of waste gas exhaust blower fan is connected with tempering room.
Described heat smoke spout quantity is some and be evenly distributed on the furnace wall of preheating chamber, and heat smoke spout adopts circular spout or annular nozzle, and its circulation area is 300 ~ 500mm 2, the width between centers between adjacent heat smoke spout is 300 ~ 500mm, and outermost heat smoke spout and adjacent furnace wall internal surface distance are 200 ~ 300mm.
Described waste gas outlet quantity is some and be evenly distributed on the furnace wall of exhaust air chamber, waste gas outlet adopts round exit, its internal diameter is 100 ~ 200mm, and the width between centers between adjacent waste gas outlet is 500 ~ 1000mm, outermost waste gas outlet and adjacent furnace wall internal surface distance≤300mm.
The burner hearth that described flue gas generates stove can be square, rectangular parallelepiped, right cylinder or Elliptic Cylinder, and preheating chamber and the exhaust air chamber inner chamber of described preheating oven can be square or rectangular parallelepiped, and the inner chamber of described tempering room can be right cylinder or Elliptic Cylinder.
The using method of described electrolgtic aluminium carbon anode twin furnace pre-heating system, comprises the steps:
Step one: start burner, generates high-temperature flue gas by burner and enters in flue gas generation stove;
Step 2: start smoke evacuation booster fan, is first generated flue gas in the high-temperature flue gas suction tempering room in stove by smoke evacuation booster fan, then by high-temperature flue gas from tempering room suction preheating oven, and high-temperature flue gas can enter in preheating chamber by heat smoke spout;
Step 3: will treat that the carbon anode of preheating is lifted into conveyor roller inlet end, start drive-motor, preheating is carried out in being transported in preheating oven by conveyor roller of adjacent one piece of carbon anode one piece, in the process of carbon anode constantly reach in preheating oven, temperature raises gradually, and the warm up time of every block carbon anode is 3 ~ 3.5h;
Step 4: when carbon anode moves to conveyor roller exit end, final preheating temperature apart from 200mm depths, carbon anode surface will reach 250 ~ 300 DEG C, by conveyor roller, preheated carbon anode is successively transported to outside preheating oven, then preheated carbon anode is sling and be installed on electrolyzer;
Step 5: after the high-temperature flue gas in preheating chamber completes the heat exchange with carbon anode, temperature reduces and becomes waste gas, waste gas enters in exhaust air chamber by gap between preheating chamber and exhaust air chamber, then waste gas exhaust blower fan is started, by waste gas exhaust blower fan, the waste gas in exhaust air chamber is sent in tempering room, make the high-temperature flue gas in waste gas and preheating chamber be mixed to form mixed flue gas;
Step 6: the input of adjustment temperature adjustment indoor exhaust air, unnecessary waste gas is discharged by chimney, in tempering room, mixed flue gas temperature is regulated by the blending ratio of adjustment waste gas and high-temperature flue gas, then enters in preheating chamber by the mixed flue gas regulated, and utilizes mixed flue gas to carry out preheating carbon anode.
The waste gas exhaust flow of described waste gas exhaust blower fan is less than the flue gas suction flow of smoke evacuation booster fan, and ensures that the pressure in preheating chamber maintains between 5 ~ 15pa.
The temperature of high-temperature flue gas when entering tempering room that described flue gas generates in stove is 1000 ~ 1200 DEG C, mixed flue gas in tempering room after leaving tempering room, enter preheating chamber before temperature be 450 ~ 500 DEG C, the temperature of mixed flue gas when entering preheating chamber is 400 ~ 450 DEG C, the top hole pressure of heat smoke spout is 30 ~ 50Kpa, and the exiting flue gas flow velocity of heat smoke spout is 80 ~ 150m/s.
The beneficial effects of the utility model:
The utility model overcomes the deficiency of traditional technology, namely the carbon anode assembled just directly is installed on electrolyzer without preheating, anode carbon block is occurred, and crackle or the probability broken increase, and the utility model is carry out preheating before carbon anode By Electrolysis groove to provide possibility, after carbon anode after preheating is installed to electrolyzer again, the cracking frequency of anode carbon block can be made to be reduced to less than 0.2%, thus to improve the security of Aluminum Electrolysis Production.
The preheating oven of the present utility model waste gas of discharging is direct discharged to air, but enters in tempering room and reclaim, and is reused by the waste heat in waste gas, thus the utility model is provided with reduce costs the effect with energy-saving and emission-reduction.
After waste gas in the utility model tempering room and high-temperature flue gas are mixed to form mixed flue gas, oxygenous hardly in mixed flue gas, when therefore carrying out heat exchange preheating by mixed flue gas to carbon anode, can effectively avoid anode carbon block surface that oxidative phenomena occurs.
The utility model by adjustment waste gas and the blending ratio of high-temperature flue gas in tempering room, can realize the adjustment to mixed flue gas temperature in tempering room, thus realizes the accurate control to the preheating temperature of carbon anode.
Accompanying drawing explanation
Fig. 1 is a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system structural representation of the present utility model;
In figure, 1-flue gas generates stove, 2-preheating oven, the smoke outlet of 3-burner, 4-exhanst gas outlet, 5-burner, 6-air intlet, 7-fuel gas inlet, 8-gas blower, 9-preheating chamber, 10-exhaust air chamber, 11-heat smoke spout, 12-conveyor roller, 13-drive-motor, 14-waste gas outlet, 15-waste gas exhaust blower fan, 16-smoke evacuation booster fan, 17-chimney, 18-tempering room, 19-carbon anode.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system, comprise flue gas and generate stove 1 and preheating oven 2, generate on stove 1 at described flue gas and be respectively arranged with burner 5 and exhanst gas outlet 4, the flue gas that described burner 5 is arranged on exhanst gas outlet 4 opposite generates on stove 1 furnace wall, and the burner hearth that smoke outlet 3 and the flue gas of burner 5 generate stove 1 is connected; In described preheating oven 2, be respectively arranged with preheating chamber 9 and exhaust air chamber 10, described preheating chamber 9 is connected by gap with between exhaust air chamber 10; The furnace wall of described preheating chamber 9 is provided with heat smoke spout 11, and the exhanst gas outlet 4 that heat smoke spout 11 and flue gas generate stove 1 is connected; The furnace bottom of described preheating chamber 9 is provided with conveyor roller 12, and conveyor roller 12 is driven by drive-motor 13, for placing carbon anode 19 on conveyor roller 12; The preheating oven 2 that described conveyor roller 12 inlet end is corresponding is provided with carbon anode 19 feeding mouth, and the preheating oven 2 that conveyor roller 12 discharge end is corresponding is provided with carbon anode 19 discharge port; The furnace wall of described exhaust air chamber 10 is provided with waste gas outlet 14, and waste gas outlet 14 is connected with chimney 17.
Described burner 5 is respectively arranged with air intlet 6 and fuel gas inlet 7, the external gas blower 8 of described air intlet 6, the external fuel gas source of described fuel gas inlet 7.
Between described exhanst gas outlet 4 and heat smoke spout 11, be provided with tempering room 18, between tempering room 18 and heat smoke spout 11, be provided with booster fan 16 of discharging fume.
Between described waste gas outlet 14 and chimney 17, be provided with waste gas exhaust blower fan 15, air outlet one tunnel of waste gas exhaust blower fan 15 is connected with chimney 17, and another road of the air outlet of waste gas exhaust blower fan 15 is connected with tempering room 18.
Described heat smoke spout 11 quantity is some and be evenly distributed on the furnace wall of preheating chamber 9, and heat smoke spout 11 adopts circular spout or annular nozzle, and its circulation area is 300 ~ 500mm 2, the width between centers between adjacent heat smoke spout 11 is 300 ~ 500mm, and outermost heat smoke spout 11 is 200 ~ 300mm with adjacent furnace wall internal surface distance.
Described waste gas outlet 14 quantity is some and be evenly distributed on the furnace wall of exhaust air chamber 10, waste gas outlet 14 adopts round exit, its internal diameter is 100 ~ 200mm, width between centers between adjacent waste gas outlet 14 is 500 ~ 1000mm, outermost waste gas outlet 14 and adjacent furnace wall internal surface distance≤300mm.
The burner hearth that described flue gas generates stove 1 can be square, rectangular parallelepiped, right cylinder or Elliptic Cylinder, and preheating chamber 9 and exhaust air chamber 10 inner chamber of described preheating oven 2 can be square or rectangular parallelepiped, and the inner chamber of described tempering room 18 can be right cylinder or Elliptic Cylinder.
The using method of described electrolgtic aluminium carbon anode twin furnace pre-heating system, comprises the steps:
Step one: start burner 5, generates high-temperature flue gas by burner 5 and enters in flue gas generation stove 1;
Step 2: start smoke evacuation booster fan 16, first flue gas is generated in the high-temperature flue gas suction tempering room 18 in stove 1 by smoke evacuation booster fan 16, again by high-temperature flue gas from tempering room 18 suction preheating oven 2, and high-temperature flue gas can enter in preheating chamber 9 by heat smoke spout 11;
Step 3: will treat that the carbon anode 19 of preheating is lifted into conveyor roller 12 inlet end, start drive-motor 13, preheating is carried out in being transported in preheating oven 2 by conveyor roller 12 of adjacent one piece of carbon anode 19 1 pieces, in the process of carbon anode 19 constantly reach in preheating oven 2, temperature raises gradually, and the warm up time of every block carbon anode 19 is 3 ~ 3.5h;
Step 4: when carbon anode 19 moves to conveyor roller 12 exit end, final preheating temperature apart from carbon anode 19 surperficial 200mm depths will reach 250 ~ 300 DEG C, by conveyor roller 12, preheated carbon anode 19 is successively transported to outside preheating oven 2, then preheated carbon anode 19 is sling and be installed on electrolyzer;
Step 5: the high-temperature flue gas in preheating chamber 9 complete with the heat exchange of carbon anode 19 after temperature reduce and become waste gas, waste gas enters in exhaust air chamber 10 by gap between preheating chamber 9 and exhaust air chamber 10, then waste gas exhaust blower fan 15 is started, by waste gas exhaust blower fan 15, the waste gas in exhaust air chamber 10 is sent in tempering room 18, make the high-temperature flue gas in waste gas and preheating chamber 9 be mixed to form mixed flue gas;
Step 6: the input of waste gas in adjustment tempering room 18, unnecessary waste gas is discharged by chimney 17, in tempering room 18, mixed flue gas temperature is regulated by the blending ratio of adjustment waste gas and high-temperature flue gas, again the mixed flue gas regulated is entered in preheating chamber 9, and utilize mixed flue gas to carry out preheating carbon anode 19.
The waste gas exhaust flow of described waste gas exhaust blower fan 15 is less than the flue gas suction flow of smoke evacuation booster fan 16, and ensures that the pressure in preheating chamber 9 maintains between 5 ~ 15pa.
The temperature of high-temperature flue gas when entering tempering room 18 that described flue gas generates in stove 1 is 1000 ~ 1200 DEG C, mixed flue gas in tempering room 18 after leaving tempering room 18, the temperature entered before preheating chamber 9 is 450 ~ 500 DEG C, the temperature of mixed flue gas when entering preheating chamber 9 is 400 ~ 450 DEG C, the top hole pressure of heat smoke spout 11 is 30 ~ 50Kpa, and the exiting flue gas flow velocity of heat smoke spout 11 is 80 ~ 150m/s.
Embodiment one
In the present embodiment, what the carbon anode of aluminium cell adopted is prebaked anode, the carbon anode replacement cycle is 24 days, anode carbon block is of a size of 600mm × 400mm × 400mm (long × wide × high), anode carbon block leaves the charcoal bowl that two diameters are 160mm, the degree of depth is 80mm, when carbon anode is assembled, every two pieces of anode carbon blocks are one group, the length of anode rod is 2000, steel pawl is 4 pawl heads, steel pawl is connected with adopting the aluminum steel welding block that explodes between anode rod, before carbon anode By Electrolysis groove, need to carry out thermal pretreatment by the utility model.
In the present embodiment, the burner hearth that flue gas generates stove 1 is rectangular parallelepiped, and built by laying bricks or stones by clay brick and form, the effective dimensions of burner hearth is 1200mm × 1200mm × 4000mm, burner 5 adopts burner with inferior speed, and burner 5 coincides with the medullary ray of burner hearth, the combustion gas of burner 5 adopts Sweet natural gas, and burning capacity is 1200Nm 3/ h.The vertical cross-section of the preheating chamber 9 of preheating oven 2 is of a size of 1000mm × 1200mm, the vertical cross-section of the exhaust air chamber 10 of preheating oven 2 is of a size of 2200mm × 500mm, the useful length (carbon anode feeding mouth is to the distance of carbon anode discharge port) of preheating oven 2 is 16500mm, and the gap between preheating chamber 9 and exhaust air chamber 10 is 150mm.The inner chamber of tempering room 18 is right cylinder, and inner cavity size is Φ 500mm × 1500mm.
Carbon anode in the present embodiment is after preheating of the present utility model, corner crack incidence after carbon anode can be made to be installed to electrolyzer is reduced to less than 0.2% by 4.5%, and the interim turnover rate of carbon anode is zero substantially, and then demonstrate validity of the present utility model.
Embodiment two
In the present embodiment, what the carbon anode of aluminium cell adopted is prebaked anode, the carbon anode replacement cycle is 28 days, anode carbon block is of a size of 600mm × 450mm × 500mm (long × wide × high), anode carbon block leaves the charcoal bowl that two diameters are 180mm, the degree of depth is 80mm, when carbon anode is assembled, every two pieces of anode carbon blocks are one group, the length of anode rod is 2200, steel pawl is 4 pawl heads, steel pawl is connected with adopting the aluminum steel welding block that explodes between anode rod, before carbon anode By Electrolysis groove, need to carry out thermal pretreatment by the utility model.
In the present embodiment, the burner hearth that flue gas generates stove 1 is right cylinder, and built by laying bricks or stones by clay brick and form, the effective dimensions of burner hearth is Φ 1500mm × 4500mm, burner 5 adopts burner with inferior speed, and burner 5 coincides with the medullary ray of burner hearth, the combustion gas of burner 5 adopts high coke mixed gas, and burning capacity is 1600Nm 3/ h.The vertical cross-section of the preheating chamber 9 of preheating oven 2 is of a size of 1100mm × 1200mm, the vertical cross-section of the exhaust air chamber 10 of preheating oven 2 is of a size of 2200mm × 500mm, the useful length (carbon anode feeding mouth is to the distance of carbon anode discharge port) of preheating oven 2 is 16500mm, and the gap between preheating chamber 9 and exhaust air chamber 10 is 150mm.The inner chamber of tempering room 18 adopts cylindrical, and inner cavity size is Φ 600mm × 1500mm.
Carbon anode in the present embodiment is after preheating of the present utility model, corner crack incidence after carbon anode can be made to be installed to electrolyzer is reduced to less than 0.2% by 5.5%, and the interim turnover rate of carbon anode is zero substantially, and then demonstrate validity of the present utility model.
Scheme in embodiment is also not used to limit scope of patent protection of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and is all contained in the scope of the claims of this case.

Claims (7)

1. an electrolgtic aluminium carbon anode twin furnace pre-heating system, it is characterized in that: comprise flue gas and generate stove and preheating oven, generate on stove at described flue gas and be respectively arranged with burner and exhanst gas outlet, the flue gas that described burner is arranged on exhanst gas outlet opposite generates on stove furnace wall, and the burner hearth that smoke outlet and the flue gas of burner generate stove is connected; In described preheating oven, be respectively arranged with preheating chamber and exhaust air chamber, described preheating chamber is connected by gap with between exhaust air chamber; The furnace wall of described preheating chamber is provided with heat smoke spout, and the exhanst gas outlet that heat smoke spout generates stove with flue gas is connected; The furnace bottom of described preheating chamber is provided with conveyor roller, and conveyor roller is driven by drive-motor, for placing carbon anode on conveyor roller; The preheating oven that described conveyor roller inlet end is corresponding is provided with carbon anode feeding mouth, and the preheating oven that conveyor roller discharge end is corresponding is provided with carbon anode discharge port; The furnace wall of described exhaust air chamber is provided with waste gas outlet, and waste gas outlet is connected with chimney.
2. a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system according to claim 1, is characterized in that: on described burner, be respectively arranged with air intlet and fuel gas inlet, the external gas blower of described air intlet, the external fuel gas source of described fuel gas inlet.
3. a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system according to claim 1, is characterized in that: between described exhanst gas outlet and heat smoke spout, be provided with tempering room, is provided with smoke evacuation booster fan between tempering room and heat smoke spout.
4. a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system according to claim 1, it is characterized in that: between described waste gas outlet and chimney, be provided with waste gas exhaust blower fan, air outlet one tunnel of waste gas exhaust blower fan is connected with chimney, and another road of the air outlet of waste gas exhaust blower fan is connected with tempering room.
5. a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system according to claim 1, it is characterized in that: described heat smoke spout quantity is some and be evenly distributed on the furnace wall of preheating chamber, heat smoke spout adopts circular spout or annular nozzle, and its circulation area is 300 ~ 500mm 2, the width between centers between adjacent heat smoke spout is 300 ~ 500mm, and outermost heat smoke spout and adjacent furnace wall internal surface distance are 200 ~ 300mm.
6. a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system according to claim 1, it is characterized in that: described waste gas outlet quantity is some and be evenly distributed on the furnace wall of exhaust air chamber, waste gas outlet adopts round exit, its internal diameter is 100 ~ 200mm, width between centers between adjacent waste gas outlet is 500 ~ 1000mm, outermost waste gas outlet and adjacent furnace wall internal surface distance≤300mm.
7. a kind of electrolgtic aluminium carbon anode twin furnace pre-heating system according to claim 3, it is characterized in that: the burner hearth that described flue gas generates stove can be square, rectangular parallelepiped, right cylinder or Elliptic Cylinder, preheating chamber and the exhaust air chamber inner chamber of described preheating oven can be square or rectangular parallelepiped, and the inner chamber of described tempering room can be right cylinder or Elliptic Cylinder.
CN201520499180.2U 2015-07-10 2015-07-10 Carbon anode twin furnace system of preheating for electrolytic aluminum Expired - Fee Related CN204959052U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108166017A (en) * 2016-12-07 2018-06-15 高德金 A kind of pre-calcining electrolytic cell production technology
CN109764693A (en) * 2019-01-24 2019-05-17 中南大学 A kind of pre-heating mean and system using flue gas heat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108166017A (en) * 2016-12-07 2018-06-15 高德金 A kind of pre-calcining electrolytic cell production technology
CN109764693A (en) * 2019-01-24 2019-05-17 中南大学 A kind of pre-heating mean and system using flue gas heat

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Termination date: 20170710