CN103496726A - Gas suspension calciner for alumina and process - Google Patents
Gas suspension calciner for alumina and process Download PDFInfo
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- CN103496726A CN103496726A CN201310385449.XA CN201310385449A CN103496726A CN 103496726 A CN103496726 A CN 103496726A CN 201310385449 A CN201310385449 A CN 201310385449A CN 103496726 A CN103496726 A CN 103496726A
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Abstract
The invention relates to the technical field of alumina production, and discloses a gas suspension calciner for alumina and a process. According to the gas suspension calciner for the alumina used in the process, a first-stage cyclone dust collector P01 connects a dust containing exhaust gas filtering system and an electric dust collector C through a flue and a filtering cyclone dust collector P00; a cooling filtering system comprises five stages of cyclone coolers and is cooled by a primary cyclone cooler C00, a first-stage cyclone cooler C01, a second-stage cyclone cooler C02, a third-stage cyclone cooler C03 and a fourth-stage cyclone cooler C04; the electric dust collector C connects a material returning system with a second-stage cyclone dust collector P02 via a pipeline by use of an air lift pump U. The gas suspension calciner for the alumina and the process can be use in new construction or transformation of calciners in the prior art, can greatly improve the efficiency of the electric dust collector, can make the content of solid particles in a gas flow entering the electric dust collector be reduced by 80% compared with an original system, can ensure the purity of the finished-product alumina and can improve the quality of the alumina.
Description
Technical field
The present invention relates to technical field of alumina production, relate in particular to a kind of aluminum oxide gaseous state suspending calcining stove and technique.
Background technology
At present, the technical process of existing aluminum oxide gaseous state suspending calcining stove: be that aluminium hydroxide is entered in one-level tornado dust collector P01 and separates after Venturi is dried, waste gas enters electric precipitator through flue, fine powder aluminium hydroxide after the electric precipitator dedusting, be pumped into CO2 aluminum oxide cooling system (directly infiltrating aluminum oxide) through airlift.Aluminium hydroxide after one-level tornado dust collector P01 separates enters second cyclone dust extractor P02 through tremie pipe, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one, two, three, four cooling cyclone C01, C02, C03, C04 and carries out cooling.Aluminum oxide cooling residual heat air-flow enters P04 body of heater roasting aluminium hydroxide through pipeline.It is cooling that cooled aluminum oxide enters last one water cooler fluidized-bed, both the finished product aluminum oxide.Aluminum oxide, after C01, enters C02 through tremie pipe and continues cooling.And the aluminum oxide once filtered through C01 approximately has the aluminum oxide of 10 ~ 30% left and right to enter in the P04 stove through stoving oven burning station.The high temperature alumina that causes the finished product aluminum oxide to contain 10 ~ 30% left and right.
Existing aluminum oxide gaseous state suspending calcining stove exists system defect, is mainly manifested in:
1) aluminium hydroxide enters one-level tornado dust collector P01 separation after Venturi is dried, and waste gas enters electric precipitator through flue.Aluminium hydroxide is after one-level tornado dust collector P01 primary treatment, and handled thing, because concentration is large, approximately has the aluminium hydroxide of 10 ~ 30% left and right to enter electric precipitator through flue.After electric precipitator is processed, material is finally sneaked into the product aluminum oxide through the air lift mud pump secondary rotary air cooling system CO2. that makes a gift to someone, and makes the product aluminum oxide contain too high aluminium hydroxide.
2) aluminium hydroxide after Venturi is dried enters one-level tornado dust collector P01 separation, because the aluminium hydroxide concentration that enters P01 is large, the processing power of one-level tornado dust collector P01 is along with material concentration increases, and processing power descends, approximately there is the aluminium hydroxide of 10 ~ 30% left and right to enter electric precipitator through flue.The material concentration of processing through electric precipitator is large, and the processing power of corresponding fly-ash separator descends, and the solid particulate matter of discharging through chimney is increased, to environment.
3) aluminum oxide generated after body of heater P04 roasting is processed by tremie pipe through three grades of tornado dust collector P03, enters one-level cooling cyclone C01.Hot gas flow enters the P04 body of heater through pipeline and continues roasting aluminium hydroxide.Aluminum oxide, after one-level cooling cyclone C01, enters secondary rotary forced air cooler C02 through tremie pipe and continues cooling.And the aluminum oxide once filtered through C01, the aluminum oxide that 10 ~ 30% left and right are approximately arranged enters stoving oven burning station with hot gas flow and enters in the P04 stove, the continuation roasting.The high temperature alumina that causes the finished product aluminum oxide to contain 10 ~ 30% left and right, bring harm to the production of electrolytic aluminum.
Summary of the invention
In order to overcome the deficiency in background technology, the invention provides a kind of aluminum oxide gaseous state suspending calcining stove and technique.
In order to realize the foregoing invention purpose, the present invention adopts technical scheme as follows:
A kind of aluminum oxide gaseous state suspending calcining stove, comprise: aluminum oxide drying system, Alumina Calcination System, containing dust gas filtration system, cold filtration system, revert system, described containing the dust gas filtration system by one-level tornado dust collector P01 by flue with filter tornado dust collector P00 and be connected; Filtering tornado dust collector P00 is connected with electric precipitator C by flue; Described cold filtration system is that the five-stage whirlwind water cooler forms, and by elementary cooling cyclone C00, one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04, is undertaken cooling; Described revert system is connected with second cyclone dust extractor P02 through pipeline by air lift mud pump U by electric precipitator C.
A kind of technique of aluminum oxide gaseous state suspending calcining stove, its step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), containing dust waste gas, entering and filtering tornado dust collector P00 after the separation, the waste gas that tornado dust collector P00 processed after filtration enters electric precipitator C through flue, the waste gas that filtration tornado dust collector P00 processed is reduced to 1 ~ 3% containing Dust Capacity, effectively reduces environmental pollution;
3), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, send into second cyclone dust extractor P02 through air lift mud pump U;
4), tornado dust collector P00 enters second cyclone dust extractor P02 with the solid material aluminium hydroxide after one-level tornado dust collector P01 separates through tremie pipe after filtration, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
5), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the five-stage whirlwind water cooler residual heat air current cooling to aluminum oxide; Be cooling gas through Category Four cyclone water cooler C04, three grades of cooling cyclone C03, secondary rotary forced air cooler C02, one-level cooling cyclone C01, the cooling P04 of the entering body of heater of elementary cooling cyclone C00 roasting aluminium hydroxide; Elementary cooling cyclone C00 continues the aluminum oxide dust contained through one-level cooling cyclone C01 hot gas flow out to process, and in the hot gas flow through again processing, alumina content is reduced to 1 ~ 3%, improves the quality of aluminum oxide;
6), that cooled aluminum oxide enters water cooler fluidized-bed e is cooling, both finished product aluminum oxide.
A kind of technique of aluminum oxide gaseous state suspending calcining stove, its step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, send into second cyclone dust extractor P02 through air lift mud pump U;
3), the aluminium hydroxide after one-level tornado dust collector P01 separates enters second cyclone dust extractor P02 through tremie pipe, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
4), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the Category Four cyclone water cooler residual heat air current cooling to aluminum oxide; It is cooling that cooled aluminum oxide enters water cooler fluidized-bed e, both the finished product aluminum oxide.
A kind of technique of aluminum oxide gaseous state suspending calcining stove, its step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), containing dust waste gas, entering and filtering tornado dust collector P00 after the separation, the waste gas that tornado dust collector P00 processed after filtration enters electric precipitator C through flue, the waste gas that filtration tornado dust collector P00 processed is reduced to 1 ~ 3% containing Dust Capacity, effectively reduces environmental pollution;
3), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, directly enter the ashes storage tank;
4), tornado dust collector P00 enters second cyclone dust extractor P02 with the solid material aluminium hydroxide after one-level tornado dust collector P01 separates through tremie pipe after filtration, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
5), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the five-stage whirlwind water cooler residual heat air current cooling to aluminum oxide; Be cooling gas through Category Four cyclone water cooler C04, three grades of cooling cyclone C03, secondary rotary forced air cooler C02, one-level cooling cyclone C01, the cooling P04 of the entering body of heater of elementary cooling cyclone C00 roasting aluminium hydroxide; Elementary cooling cyclone C00 continues the aluminum oxide dust contained through one-level cooling cyclone C01 hot gas flow out to process, and in the hot gas flow through again processing, alumina content is reduced to 1 ~ 3%, improves the quality of aluminum oxide;
6), that cooled aluminum oxide enters water cooler fluidized-bed e is cooling, both finished product aluminum oxide.
Owing to adopting technical scheme as above, the present invention has following superiority:
A kind of aluminum oxide gaseous state suspending calcining stove and technique, can be used in newly-built or to the transformation of existing stoving oven or separately subitem implement, its superiority is as follows:
1) after adopt improving containing the dust gas filtration system, make the waste gas after one-level tornado dust collector PO1 primary treatment contain 10 ~ 30% solid matter, through tornado dust collector P00, again further process, the solid particulate matter content after cyclone dust removal is reduced to below 1 ~ 3%.The content of solid particulate matter that makes to enter the air-flow of electric precipitator significantly reduces, the solid particulate matter aluminium hydroxide amount content that enters electric precipitator reduces, make the solid particulate matter minimizing of discharge enter the electric precipitator reduction, the solid particulate matter content in the waste gas after electric precipitation further filters is compared with original system and is reduced more than 80%.Make electric precipitator efficiency significantly to improve,
2) material of the returning charge mode after adopt improving after being processed by electric precipitator, directly send into second cyclone dust extractor P02 with air lift mud pump, directly enter stoving oven P04 body of heater through second cyclone dust extractor P02 tremie pipe and carry out further roasting, make the aluminium hydroxide content in product interior without aluminium hydroxide by 10 ~ 30% original reduction products, improved the quality of product.Guaranteed the pure of finished product aluminum oxide.
3) the cold filtration system that adopts the five-stage whirlwind water cooler after improving to form, the alumina content that enters P04 body of heater high-temperature zone is reduced to below 1 ~ 3%, the content of the high temperature alumina in product is reduced to below 5%, thereby the high temperature alumina content in the finished product aluminum oxide is reduced to below 1 ~ 3%, has improved the quality of aluminum oxide.
[accompanying drawing explanation]
Fig. 1 is existing aluminum oxide gas stoving oven process flow sheet;
Fig. 2 is aluminum oxide gaseous state suspending calcining stove the first process flow sheet of the present invention
Fig. 3 is aluminum oxide gaseous state suspending calcining stove the second process flow sheet of the present invention;
Fig. 4 is aluminum oxide gaseous state suspending calcining stove the 3rd process flow sheet of the present invention;
[embodiment]
Below in conjunction with legend, embodiment being described,
As shown in Figure 2,3, 4, a kind of aluminum oxide gaseous state suspending calcining stove, comprise: aluminum oxide drying system, Alumina Calcination System, containing dust gas filtration system, cold filtration system, revert system is characterized in that: described containing the dust gas filtration system by one-level tornado dust collector P01 by flue with filter tornado dust collector P00 and be connected; Filtering tornado dust collector P00 is connected with electric precipitator C by flue; Described cold filtration system is that the five-stage whirlwind water cooler forms, and by elementary cooling cyclone C00, one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04, is undertaken cooling; Described revert system is connected with second cyclone dust extractor P02 through pipeline by air lift mud pump U by electric precipitator C.
Embodiment 1
A kind of technique of aluminum oxide gaseous state suspending calcining stove, its step is as follows:
1), be by aluminium hydroxide after Venturi Y bake drying, enter in one-level tornado dust collector P01 and separated;
2), containing dust waste gas, entering and filtering tornado dust collector P00 after the separation, make to contain the air-flow of 10 ~ 30% solid particulate matter, further process, the waste gas that tornado dust collector P00 processed after filtration enters electric precipitator C through flue, the content of solid particulate matter that makes to enter the air-flow of electric precipitator significantly reduces, the solid particulate matter content that enters electric precipitator reduces, make electric precipitator efficiency to improve, the solid particulate matter of discharge is reduced.The waste gas that filtration tornado dust collector P00 processed is reduced to 1 ~ 3% containing Dust Capacity, effectively reduces environmental pollution;
3), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, send into second cyclone dust extractor P02 through air lift mud pump U; Through the further roasting of stoving oven P04, guaranteed the pure of finished product aluminum oxide.
4), tornado dust collector P00 enters second cyclone dust extractor P02 with the solid material aluminium hydroxide after one-level tornado dust collector P01 separates through tremie pipe after filtration, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
5), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the five-stage whirlwind water cooler residual heat air current cooling to aluminum oxide; Be cooling gas cooling through Category Four cyclone water cooler C04, three grades of cooling cyclone C03, secondary rotary forced air cooler C02, one-level cooling cyclone C01, elementary cooling cyclone C00, then enter P04 body of heater roasting aluminium hydroxide by burning station V08, V19; Elementary cooling cyclone C00 continues the aluminum oxide dust contained through one-level cooling cyclone C01 hot gas flow out to process, alumina content through entering in the P04 stove is reduced to below 1 ~ 3%, thereby the high temperature alumina content in the finished product aluminum oxide is reduced to below 1 ~ 3%, has improved the quality of aluminum oxide.
6), that cooled aluminum oxide enters water cooler fluidized-bed e is cooling, both finished product aluminum oxide.
Embodiment 2
A kind of technique of aluminum oxide gaseous state suspending calcining stove, can be for existing aluminum oxide gaseous state suspending calcining stove transformation, and the air lift mud pump U that electric precipitator C connects is connected with second cyclone dust extractor P02 by the pipeline of installing; Its processing step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, send into second cyclone dust extractor P02 through air lift mud pump U;
3), the aluminium hydroxide after one-level tornado dust collector P01 separates enters second cyclone dust extractor P02 through tremie pipe, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
4), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the Category Four cyclone water cooler residual heat air current cooling to aluminum oxide; It is cooling that cooled aluminum oxide enters water cooler fluidized-bed e, both the finished product aluminum oxide.
Embodiment 3
A kind of technique of aluminum oxide gaseous state suspending calcining stove can, for existing aluminum oxide gaseous state suspending calcining stove transformation, be to increase single filter tornado dust collector P00 on one-level tornado dust collector P01.The waste gas that tornado dust collector P00 processed after filtration can be reduced to below 1 ~ 3% containing Dust Capacity, can effectively reduce discharge index, reduces environmental pollution.And increase elementary cooling cyclone (C00) the contained aluminum oxide dust of hot gas flow out continues to process through the one-level cooling cyclone on the one-level cooling cyclone, in the hot gas flow through again processing, alumina content can be reduced to below 1 ~ 3%.Can effectively improve the quality of aluminum oxide; Its processing step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), containing dust waste gas, entering and filtering tornado dust collector P00 after the separation, the waste gas that tornado dust collector P00 processed after filtration enters electric precipitator C through flue, the waste gas that filtration tornado dust collector P00 processed is reduced to 1 ~ 3% containing Dust Capacity, effectively reduces environmental pollution;
3), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, directly enter ashes storage tank O;
4), tornado dust collector P00 enters second cyclone dust extractor P02 with the solid material aluminium hydroxide after one-level tornado dust collector P01 separates through tremie pipe after filtration, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
5), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the five-stage whirlwind water cooler residual heat air current cooling to aluminum oxide; Be cooling gas through Category Four cyclone water cooler C04, three grades of cooling cyclone C03, secondary rotary forced air cooler C02, one-level cooling cyclone C01, the cooling P04 of the entering body of heater of elementary cooling cyclone C00 roasting aluminium hydroxide; Elementary cooling cyclone C00 continues the aluminum oxide dust contained through one-level cooling cyclone C01 hot gas flow out to process, and in the hot gas flow through again processing, alumina content is reduced to 1 ~ 3%, improves the quality of aluminum oxide;
6), that cooled aluminum oxide enters water cooler fluidized-bed e is cooling, both finished product aluminum oxide.
The present invention can be newly-built or to the transformation of existing stoving oven or separately subitem implement.
Claims (4)
1. an aluminum oxide gaseous state suspending calcining stove, comprise: aluminum oxide drying system, Alumina Calcination System, containing dust gas filtration system, cold filtration system, revert system is characterized in that: described containing the dust gas filtration system by one-level tornado dust collector P01 by flue with filter tornado dust collector P00 and be connected; Filtering tornado dust collector P00 is connected with electric precipitator C by flue; Described cold filtration system is that the five-stage whirlwind water cooler forms, and by elementary cooling cyclone C00, one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04, is undertaken cooling; Described revert system is connected with second cyclone dust extractor P02 through pipeline by air lift mud pump U by electric precipitator C.
2. the technique of an aluminum oxide gaseous state suspending calcining stove, it is characterized in that: its step is as follows:
1) be, that aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), containing dust waste gas, entering and filtering tornado dust collector P00 after the separation, the waste gas that tornado dust collector P00 processed after filtration enters electric precipitator C through flue, the waste gas that filtration tornado dust collector P00 processed is reduced to 1 ~ 3% containing Dust Capacity, effectively reduces environmental pollution;
3), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, send into second cyclone dust extractor P02 through air lift mud pump U;
4), tornado dust collector P00 enters second cyclone dust extractor P02 with the solid material aluminium hydroxide after one-level tornado dust collector P01 separates through tremie pipe after filtration, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
5), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the five-stage whirlwind water cooler residual heat air current cooling to aluminum oxide; Be cooling gas through Category Four cyclone water cooler C04, three grades of cooling cyclone C03, secondary rotary forced air cooler C02, one-level cooling cyclone C01, the cooling P04 of the entering body of heater of elementary cooling cyclone C00 roasting aluminium hydroxide; Elementary cooling cyclone C00 continues the aluminum oxide dust contained through one-level cooling cyclone C01 hot gas flow out to process, and in the hot gas flow through again processing, alumina content is reduced to 1 ~ 3%, improves the quality of aluminum oxide;
6), that cooled aluminum oxide enters water cooler fluidized-bed e is cooling, both finished product aluminum oxide.
3. the technique of an aluminum oxide gaseous state suspending calcining stove, it is characterized in that: its step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, send into second cyclone dust extractor P02 through air lift mud pump U;
3), the aluminium hydroxide after one-level tornado dust collector P01 separates enters second cyclone dust extractor P02 through tremie pipe, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
4), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the Category Four cyclone water cooler residual heat air current cooling to aluminum oxide; It is cooling that cooled aluminum oxide enters water cooler fluidized-bed e, both the finished product aluminum oxide.
4. the technique of an aluminum oxide gaseous state suspending calcining stove, it is characterized in that: its step is as follows:
1), aluminium hydroxide is entered in one-level tornado dust collector P01 and separated after Venturi Y is dried;
2), containing dust waste gas, entering and filtering tornado dust collector P00 after the separation, the waste gas that tornado dust collector P00 processed after filtration enters electric precipitator C through flue, the waste gas that filtration tornado dust collector P00 processed is reduced to 1 ~ 3% containing Dust Capacity, effectively reduces environmental pollution;
3), through electric precipitator C to carrying out dedusting again containing dust waste gas, the fine powder aluminium hydroxide after dedusting, directly enter ashes storage tank O;
4), tornado dust collector P00 enters second cyclone dust extractor P02 with the solid material aluminium hydroxide after one-level tornado dust collector P01 separates through tremie pipe after filtration, aluminium hydroxide after second cyclone dust extractor P02 separates enters the P04 body of heater through tremie pipe and carries out roasting, the aluminum oxide generated after roasting separates in tornado dust collector P03, aluminum oxide after separation is through tremie pipe, enters successively one-level cooling cyclone C01, secondary rotary forced air cooler C02, three grades of cooling cyclone C03, Category Four cyclone water cooler C04 carry out cooling;
5), by cold gas, through cooling gas import f, enter P04 body of heater roasting aluminium hydroxide through pipeline to the five-stage whirlwind water cooler residual heat air current cooling to aluminum oxide; Be cooling gas through Category Four cyclone water cooler C04, three grades of cooling cyclone C03, secondary rotary forced air cooler C02, one-level cooling cyclone C01, the cooling P04 of the entering body of heater of elementary cooling cyclone C00 roasting aluminium hydroxide; Elementary cooling cyclone C00 continues the aluminum oxide dust contained through one-level cooling cyclone C01 hot gas flow out to process, and in the hot gas flow through again processing, alumina content is reduced to 1 ~ 3%, improves the quality of aluminum oxide;
6), that cooled aluminum oxide enters water cooler fluidized-bed e is cooling, both finished product aluminum oxide.
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| CN108622922A (en) * | 2018-07-09 | 2018-10-09 | 中铝集团山西交口兴华科技股份有限公司 | A kind of aluminium oxide returning charge calciner and method |
| CN109827426A (en) * | 2019-03-07 | 2019-05-31 | 北京航化节能环保技术有限公司 | A kind of anticorrosive roasting system and method |
| CN109827426B (en) * | 2019-03-07 | 2024-09-20 | 北京航化节能环保技术有限公司 | Corrosion-resistant roasting system and method |
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| CN103496726B (en) | 2016-05-18 |
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