CN208471556U - The device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor - Google Patents
The device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor Download PDFInfo
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- CN208471556U CN208471556U CN201821062399.6U CN201821062399U CN208471556U CN 208471556 U CN208471556 U CN 208471556U CN 201821062399 U CN201821062399 U CN 201821062399U CN 208471556 U CN208471556 U CN 208471556U
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Abstract
The utility model relates to metallurgy aluminium fields, it is concretely the device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor, including rotary kiln, cyclone separator, cooler, rotary kiln one end is kiln hood, the other end is kiln tail, the discharge port of kiln hood is connected by the feed inlet of cooling tube and cooler, the discharge port of kiln tail is connected by the feed inlet of tail gas recycle pipe and cyclone separator, rotary kiln is obliquely installed, kiln hood is located at below kiln tail, the fuel inlet of kiln hood is connect with cartridge, the air intlet of kiln hood is connect with wind conveying pipe, the raw meal inlet of kiln tail is connect with raw material pipe, one end that raw material pipe is located in kiln tail is provided with spray head.Solve it is existing remove the crystallisation of organic matter, oxidizing process, roasting method, ion-exchange, causticizing process etc. in alumina, these methods have there is a problem of that additive consuming cost is high, operating difficulties is not easy to realize, be not easy filtering discharge, regeneration is difficult, recovery efficiency is low.
Description
Technical field
It the utility model relates to metallurgy aluminium field, is had in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor
The device of machine object.
Background technique
It is needed in metallurgical aluminium industry through alumina producing Bayer process, C0 in ore and lime2In process of production with
NaOH reaction generates Na2CO3And a part of Na2C2O4, gradually accumulation can reduce cycle efficieny, increase production cost, and meeting exists
It is precipitated on equipment and pipeline, influences normally to produce, so the organic matter generated during alumina producing Bayer process is increased to one
It must be excluded after determining concentration, be allowed to be maintained at a lower level.Existing processing method mainly include the following types: crystallisation,
Oxidizing process, roasting method, ion-exchange, causticizing process etc., these methods, which have, has additive consuming cost height, operating difficulties not
It easily realizes, be not easy filtering discharge, the problem that regeneration is difficult, recovery efficiency is low.
Therefore need a kind of structure simple, by rotary kiln carry out combustion method go it is organic in alumina mother liquor
Object safely and effectively handles inertia aluminium ash in aluminium ash, handles Bayer process richness product organic matter using dangerous waste aluminium ash, two-way processing waste
The device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor.
Utility model content
The utility model goes the crystallisation of organic matter, oxidizing process, roasting method, ion exchange in alumina for existing
Method, causticizing process etc., these methods, which have, has that additive consuming cost is high, operating difficulties is not easy to realize, is not easy filtering discharge, again
Raw problem difficult, recovery efficiency is low, provides the device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor.
The utility model solves above-mentioned technical problem, the technical solution adopted is that, aluminium ash sintering process cooperation-removal aluminium oxide
The device of organic matter includes rotary kiln, cyclone separator, cooler in mother liquor, and rotary kiln one end is kiln hood, and the other end is kiln tail,
The discharge port of kiln hood is connected by the feed inlet of cooling tube and cooler, and the discharge port of kiln tail passes through tail gas recycle pipe and whirlwind point
Feed inlet connection from device, rotary kiln are obliquely installed, and kiln hood is located at below kiln tail, and the fuel inlet of kiln hood is connect with cartridge,
The air intlet of kiln hood is connect with wind conveying pipe, and the raw meal inlet of kiln tail is connect with raw material pipe, and raw material pipe is located at one end in kiln tail
It is provided with spray head.
The purpose designed in this way is, by being passed through raw slurry, fuel and air in rotary kiln, carries out at 1000 DEG C
Clinkersintering reacts, and it is ripe that α-aluminium oxide in aluminium ash reacts generation sodium aluminate with alkali, sodium carbonate and the sodium oxalate in raw slurry
Material.The clinker sintered after cooling, is sent into Clinker digestion system.Wherein reaction equation are as follows:
It is sintered main reaction:
AL2O3+NaOH+3H2O → NaAL(OH)4+H2O↑
AL2O3+Na2CO3+3H2O → NaAL(OH)4+CO2↑
AL2O3+NaC2O4+3H2O → NaAL(OH)4+CO2↑
It is sintered side reaction:
SiO2 +AL2O3+NaOH → Na2O·AL2O3·X SiO2nH2O
Fe2O3+S Na2CO3 + NaOH → Na2O·Fe2O3 +CO2↑
MgO/ CaO+ SiO2→MgO/ CaO·SiO2
The clinker sintered is sent into ball mill after cooler is cooled to 120 DEG C, with conveyer, and supplying alumina evaporation is female
Liquid is sintered, and can gradually consume the organic matter of alumina producing system, is reached and is excluded organic matter in alumina producing system
Purpose.CO is converted to by the organic matter that evaporation mother liquor and evaporation salt discharge are taken out of after sintering2Gas, with kiln exit gas, through revolving
After wind separator, atmosphere is discharged into newly-built chimney.Using in aluminium ash processing aluminum oxide production process, that is, Bayer process is recycled
It produces a large amount of in alumina process；The valuable material in aluminium ash has been recycled again, and keeps danger wastes conversion ratio generally discarded
Object, convenient for the processing of toxic danger wastes.Alumina system is wherein recycled into progress concentration and settlement and separates to obtain sodium carbonate and aluminium
Alumina system is added sodium oxalate decomposition of crystal seed, aluminium ash slurrying after the slurry after decomposition filters sodium oxalate, by institute by grey slurrying
Raw slurry processed adds quantitative lime and is sintered to obtain clinker, and clinker enters Bayer process aluminium oxide after primary wash liquor dissolves out
Production system.It solves and existing removes the crystallisation of organic matter, oxidizing process, roasting method, ion-exchange, causticizing process in alumina
Have Deng, these methods and has that additive consuming cost is high, operating difficulties is not easy to realize, is not easy that filtering discharge, regeneration is difficult, returns
The problem of receiving low efficiency.
Further, rotary kiln bottom is provided with motion bar, and scraping blade is provided on motion bar, and motion bar one end is worn from kiln tail
Out.
The purpose designed in this way is have in a large amount of oxidations in the reaction of entire combustion method deoxidation aluminium mother liquor organic matter
Between product be precipitated, can be adsorbed on rotary kiln inner wall, for a long time do not clear up easily occur rotary kiln blocking the problem of, pass through setting
Motion bar and scraping blade enable to strike off rotary kiln inner wall bottom oxide, improve the service life of whole device.
Optionally, the motion bar other end is located at turn around in kiln, and is taper, and scraping blade bottom is contacted with rotary kiln inner wall, and
One end of scraping blade towards kiln hood is tapered.
Optionally, kiln tail is provided with sealing ring, and motion bar passes through sealing ring.
Further, kiln tail bottom discharge port is connect with ash material collecting pipe, and the first control valve, defeated wind are provided on cartridge
It is provided with blower on pipe, the second control valve is provided on cooling tube, is provided with third control valve on raw material pipe.
The purpose designed in this way is, can be returned the Alpha-alumina that reaction generates by the ash material collecting pipe of setting
It receives, the flow of each pipeline can be controlled by the first control valve, the second control valve and third control valve of setting.
Optionally, spray head includes the first jet pipe, the second jet pipe and third jet pipe, the first jet pipe, the second jet pipe and third spray
Pipe is sequentially connected, and caliber is sequentially reduced, and the first liquid outlet is provided on the first jet pipe, and second is provided on the second jet pipe and goes out liquid
Mouthful, it is provided with third liquid outlet on third jet pipe, third jet pipe is far from raw material pipe.
The purpose designed in this way is, spray head is formed by the way that three jet pipes that caliber is sequentially reduced are arranged, since caliber is deposited
In difference, there is also differences in each jet pipe hydraulic for raw slurry, so that the blockage of spray pipe probability far from raw material pipe significantly drops
It is low.
Optionally, tight loop is provided between raw material pipe and spray head.
The beneficial effects of the utility model include at least following one；
1, it using in aluminium ash processing aluminum oxide production process, that is, has recycled a large amount of during alumina producing Bayer process
's；The valuable material in aluminium ash has been recycled again, and has made the general waste of danger wastes conversion ratio, is convenient for toxic danger wastes
Processing.Alumina system is wherein recycled into progress concentration and settlement and separates to obtain sodium carbonate and aluminium ash slurrying, alumina system is added
Add sodium oxalate decomposition of crystal seed, made raw slurry is added quantitative lime by aluminium ash slurrying after the slurry after decomposition filters sodium oxalate
It is sintered to obtain clinker, clinker enters Bayer process alumina producing system after primary wash liquor dissolves out.It solves existing
The crystallisation of organic matter, oxidizing process, roasting method, ion-exchange, causticizing process etc. in alumina are removed, these methods, which have, to be existed
Additive consuming cost is high, operating difficulties is not easy to realize, is not easy filtering discharge, the problem that regeneration is difficult, recovery efficiency is low.
2, there are a large amount of intermediate oxidation products to be precipitated in the reaction of entire combustion method deoxidation aluminium mother liquor organic matter, can adsorb
On rotary kiln inner wall, does not clear up the problem of rotary kiln blocking easily occurs for a long time, by the motion bar and scraping blade of setting, be allowed to
Rotary kiln inner wall bottom oxide can be struck off, improve the service life of whole device.
3, the Alpha-alumina that reaction generates can be recycled by the ash material collecting pipe of setting, passes through the first of setting
Control valve, the second control valve and third control valve can control the flow of each pipeline.
4, spray head is formed by the way that three jet pipes that caliber is sequentially reduced are arranged, since caliber has differences, raw slurry is each
There is also differences for a jet pipe hydraulic, so that the blockage of spray pipe probability far from raw material pipe is greatly lowered.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor；
Fig. 2 is nozzle structure schematic diagram；
Fig. 3 is rotary kiln cross section structure schematic diagram；
In the figure, it is marked as 1 be rotary kiln, 2 be kiln hood, 3 be kiln tail, 4 make a living expects pipe, 5 be spray head, 501 be the first jet pipe,
502 be the second jet pipe, 503 be third jet pipe, 6 be wind conveying pipe, 7 be cartridge, 8 be cooling tube, 9 be ash material collecting pipe, 10 be
Ash material collector, 11 be tail gas recycle pipe, 12 be cyclone separator, 13 be blower, 14 be the first control valve, 15 be the second control
Valve, 16 be motion bar, 17 be sealing ring, 18 be scraping blade, 19 be third control valve, 20 be tight loop, 21 be third liquid outlet, 22
It is the first liquid outlet for the second liquid outlet, 23.
Specific embodiment
It is clear in order to enable the purpose of this utility model, technical solution and advantage to be more clear, below in conjunction with attached drawing and
The present invention will be further described in detail for embodiment.It should be appreciated that specific embodiment described herein is only used to
It explains the utility model, is not used to limit the utility model protection content.
In the description of the present invention, it should be understood that term " one end ", " center ", " circumferential direction ", "upper", " interior
The orientation or positional relationship of the instructions such as side ", " outside ", " other end ", " middle part ", " top ", " side " is based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as practical new to this
The limitation of type.
Embodiment 1
As shown in Figure 1, the device of organic matter includes rotary kiln 1, whirlwind in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor
Separator 12, cooler, 1 one end of rotary kiln are kiln hood 2, and the other end is kiln tail 3, the discharge port of kiln hood 2 by cooling tube 8 with it is cold
But the feed inlet connection of machine, the discharge port of kiln tail 3 are connect with the feed inlet of cyclone separator 12 by tail gas recycle pipe 11, are turned round
Kiln 1 is obliquely installed, and kiln hood 2 is located at the lower section of kiln tail 3, and the fuel inlet of kiln hood 2 is connect with cartridge 7, the air intlet of kiln hood 2 and
Wind conveying pipe 6 connects, and the raw meal inlet of kiln tail 3 is connect with raw material pipe 4, and one end that raw material pipe 4 is located in kiln tail 3 is provided with spray head 5.
In use, being passed through raw slurry, fuel and air in rotary kiln, clinkersintering reaction, aluminium are carried out at 1000 DEG C
α-aluminium oxide in ash is reacted with alkali, sodium carbonate and the sodium oxalate in raw slurry generates sodium aluminate clinker.The clinker warp sintered
After cooling, it is sent into Clinker digestion system.Wherein reaction equation are as follows:
It is sintered main reaction
AL2O3+NaOH+3H2O → NaAL(OH)4+H2O↑
AL2O3+Na2CO3+3H2O → NaAL(OH)4+CO2↑
AL2O3+NaC2O4+3H2O → NaAL(OH)4+CO2↑
It is sintered side reaction:
SiO2 +AL2O3+NaOH → Na2O·AL2O3·X SiO2nH2O
Fe2O3+S Na2CO3 + NaOH → Na2O·Fe2O3 +CO2↑
MgO/ CaO+ SiO2→MgO/ CaO·SiO2
The clinker sintered is sent into ball mill after cooler is cooled to 120 DEG C, with conveyer, and supplying alumina evaporation is female
Liquid is sintered, and can gradually consume the organic matter of alumina producing system, is reached and is excluded organic matter in alumina producing system
Purpose.CO is converted to by the organic matter that evaporation mother liquor and evaporation salt discharge are taken out of after sintering2Gas, with kiln exit gas, through revolving
After wind separator, atmosphere is discharged into newly-built chimney.Using in aluminium ash processing aluminum oxide production process, that is, Bayer process is recycled
It produces a large amount of in alumina process；The valuable material in aluminium ash has been recycled again, and keeps danger wastes conversion ratio generally discarded
Object, convenient for the processing of toxic danger wastes.Alumina system is wherein recycled into progress concentration and settlement and separates to obtain sodium carbonate and aluminium
Alumina system is added sodium oxalate decomposition of crystal seed, aluminium ash slurrying after the slurry after decomposition filters sodium oxalate, by institute by grey slurrying
Raw slurry processed adds quantitative lime and is sintered to obtain clinker, and clinker enters Bayer process aluminium oxide after primary wash liquor dissolves out
Production system.It solves and existing removes the crystallisation of organic matter, oxidizing process, roasting method, ion-exchange, causticizing process in alumina
Have Deng, these methods and has that additive consuming cost is high, operating difficulties is not easy to realize, is not easy that filtering discharge, regeneration is difficult, returns
The problem of receiving low efficiency.
Embodiment 2
Scraping blade is provided on motion bar 16 as shown in figure 3,1 bottom of rotary kiln is provided with motion bar 16 based on embodiment 1
18,16 one end of motion bar is pierced by from kiln tail 3.16 other end of motion bar is located at turn around in kiln 1, and be taper, 18 bottom of scraping blade with
The contact of 1 inner wall of rotary kiln, and one end of scraping blade towards kiln hood 2 is tapered.Kiln tail 3 is provided with sealing ring 17, and motion bar 16 passes through
Sealing ring 17.
In use, there are a large amount of intermediate oxidation products to be precipitated in the reaction of entire combustion method deoxidation aluminium mother liquor organic matter,
It can be adsorbed on rotary kiln inner wall, not clear up the problem of rotary kiln blocking easily occurs for a long time, by the motion bar of setting and scrape
Piece enables to strike off rotary kiln inner wall bottom oxide, improves the service life of whole device.
It can prevent motion bar from taking raw slurry in rotary kiln out of in activity by the way that sealing ring is arranged simultaneously, also be returned to entire
Rotary kiln internal environment is sealed, and prevents from leaking air in sintering reaction.
Embodiment 3
Based on embodiment 1,3 bottom discharge port of kiln tail is connect with ash material collecting pipe 9, and the first control is provided on cartridge 7
Valve 14 is provided with blower 13 on wind conveying pipe 6, the second control valve 15 is provided on cooling tube 8, is provided with third control on raw material pipe 4
Valve 19 processed.
In use, the ash material collecting pipe of setting can recycle the Alpha-alumina that reaction generates, pass through the of setting
One control valve, the second control valve and third control valve can control the flow of each pipeline.
Embodiment 4
Based on embodiment 1, as shown in Fig. 2, spray head 5 includes the first jet pipe 501, the second jet pipe 502 and third jet pipe 503,
First jet pipe 501, the second jet pipe 502 and third jet pipe 503 are sequentially connected, and caliber is sequentially reduced, and are arranged on the first jet pipe 501
There is the first liquid outlet 23, the second liquid outlet 22 is provided on the second jet pipe 502, is provided with third liquid outlet on third jet pipe 503
21, third jet pipe 503 is far from raw material pipe 4.
In use, three jet pipes composition spray head that setting caliber is sequentially reduced, since caliber has differences, raw slurry is each
There is also differences for a jet pipe hydraulic, so that the blockage of spray pipe probability far from raw material pipe is greatly lowered.
Embodiment 5
Based on embodiment 4, tight loop 20 is provided between raw material pipe 4 and spray head 5.
Claims (7)
1. the device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor, including rotary kiln (1), cyclone separator
(12), cooler, described rotary kiln (1) one end are kiln hood (2), and the other end is kiln tail (3), and the discharge port of kiln hood (2) passes through cold
But pipe (8) is connect with the feed inlet of cooler, and the discharge port of kiln tail (3) passes through tail gas recycle pipe (11) and cyclone separator (12)
Feed inlet connection, it is characterised in that: the rotary kiln (1) is obliquely installed, kiln hood (2) be located at kiln tail (3) lower section, kiln hood (2)
Fuel inlet connect with cartridge (7), the air intlet of kiln hood (2) is connect with wind conveying pipe (6), the raw material of the kiln tail (3)
Import is connect with raw material pipe (4), and one end that raw material pipe (4) is located in kiln tail (3) is provided with spray head (5).
2. the device of organic matter, feature exist in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor according to claim 1
In: rotary kiln (1) bottom is provided with motion bar (16), is provided on motion bar (16) scraping blade (18), motion bar (16) one
End is pierced by from kiln tail (3).
3. the device of organic matter, feature exist in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor according to claim 2
In: motion bar (16) other end is located at turn around in kiln (1), and is taper, and scraping blade (18) bottom and rotary kiln (1) are interior
Wall contact, and one end of scraping blade towards kiln hood (2) is tapered.
4. the device of organic matter, feature exist in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor according to claim 3
In: the kiln tail (3) is provided with sealing ring (17), and the motion bar (16) passes through sealing ring (17).
5. the device of organic matter, feature exist in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor according to claim 1
In: kiln tail (3) bottom discharge port is connect with ash material collecting pipe (9), is provided with the first control valve on the cartridge (7)
(14), it is provided with blower (13) on the wind conveying pipe (6), is provided with the second control valve (15), the life on the cooling tube (8)
Third control valve (19) are provided in expects pipe (4).
6. the device of organic matter, feature exist in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor according to claim 1
In: the spray head (5) includes the first jet pipe (501), the second jet pipe (502) and third jet pipe (503), first jet pipe
(501), the second jet pipe (502) and third jet pipe (503) are sequentially connected, and caliber is sequentially reduced, and the first jet pipe is arranged on (501)
Have the first liquid outlet (23), be provided on the second jet pipe (502) the second liquid outlet (22), is provided on third jet pipe (503)
Three liquid outlets (21), third jet pipe (503) is far from raw material pipe (4).
7. the device of organic matter, feature exist in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor according to claim 6
In: tight loop (20) are provided between the raw material pipe (4) and spray head (5).
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| CN201821062399.6U CN208471556U (en) | 2018-07-05 | 2018-07-05 | The device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor |
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| CN201821062399.6U CN208471556U (en) | 2018-07-05 | 2018-07-05 | The device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793213A (en) * | 2018-07-05 | 2018-11-13 | 云南文山铝业有限公司 | The method and device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor |
-
2018
- 2018-07-05 CN CN201821062399.6U patent/CN208471556U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793213A (en) * | 2018-07-05 | 2018-11-13 | 云南文山铝业有限公司 | The method and device of organic matter in aluminium ash sintering process cooperation-removal aluminium oxide mother liquor |
| CN108793213B (en) * | 2018-07-05 | 2021-03-05 | 云南文山铝业有限公司 | Method and device for removing organic matters in aluminum oxide mother liquor cooperatively by aluminum ash sintering method |
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