CN106145166B - A kind of alumina producing mesohigh dissolution heat integration Application way and device - Google Patents
A kind of alumina producing mesohigh dissolution heat integration Application way and device Download PDFInfo
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- CN106145166B CN106145166B CN201510126491.9A CN201510126491A CN106145166B CN 106145166 B CN106145166 B CN 106145166B CN 201510126491 A CN201510126491 A CN 201510126491A CN 106145166 B CN106145166 B CN 106145166B
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- ore pulp
- desiliconizing
- heat exchange
- heat
- mineral slurry
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- 238000004090 dissolution Methods 0.000 title claims abstract description 31
- 230000010354 integration Effects 0.000 title claims abstract description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000002002 slurry Substances 0.000 claims abstract description 52
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 43
- 239000011707 mineral Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000029087 digestion Effects 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000007701 flash-distillation Methods 0.000 claims description 12
- 238000001556 precipitation Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 2
- 235000019698 starch Nutrition 0.000 claims 2
- 239000008107 starch Substances 0.000 claims 2
- 238000006392 deoxygenation reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000000227 grinding Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- 239000003643 water by type Substances 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses a kind of alumina producing mesohigh dissolution heat integration Application way and device, by using dissolved mineral slurry final stage flash-pot exhaust steam and desiliconization ore pulp heat exchange, condensed water after initial steam heating dissolved mineral slurry preheats dissolved mineral slurry and desiliconization ore pulp successively, to reduce the heat utilization efficiency that drop temperature and raising initial steam are dodged in flash tank end.In heat integration Application way disclosed by the invention, water, steam flow journey are simple, heat utilization efficiency is high, small investment, heat the making full use of in digestion series of high steam can be realized, may insure that live steam condensed water is returned in higher-pressure deaerator again additionally need not heat to it, be the technique that the heat integration of a suitable high temperature dissolution utilizes.
Description
Technical field
The present invention relates to a kind of field of aluminum oxide production, more particularly to a kind of alumina producing mesohigh dissolution heat integration
The method and device utilized.
Background technology
High pressure digestion is the core process in alumina producing.Existing high pressure digestion typically uses and technique is produced by below：From
Raw ore slurry grinds the ore pulp sent and is heated to by pre-desiliconizing heating tank (or double-tube heat exchanger) after desiliconization temperature in desiliconization slot
Desiliconization is stopped, thermal source used is generally the low-pressure steam (0.6bar) that steam power plant's low-pressure steam pipe network provides.Ore pulp after desiliconization
Leaching temperature is heated to by double-tube heat exchanger again, thermal source used is followed successively by the flash distillation exhaust steam at different levels of ore pulp, initial steam after dissolution
The flash distillation exhaust steam (or live steam condensed water) of condensed water, high pressure initial steam.Live steam condensed water (230~240 after preheating
DEG C) by expenditure and pressure produce low-pressure steam (~0.6bar) be incorporated to low-pressure steam pipe network, condensed water sends steam power plant back to after flash distillation.
Such a method there is it is following the shortcomings that：(1) steam to high pressure dissolving out process two kinds of different parameters of offer is needed,
Add the design difficulty of heat distribution pipe network；(2) live steam condensed water needs extra increase flashing apparatus, adds disposable throwing
Money；(3) due to fluctuation, when the low-pressure steam that live steam condensed water flashes off is incorporated to thermal depression pipe network, easily press
The unbalanced phenomenon of power, is impacted to flashing apparatus and heat distribution pipe network；(4) dissolution end is dodged exhaust steam and is used for after preheating pre-desiliconizing
Ore pulp, heat transfer temperature difference is small, unfavorable to reducing end sudden strain of a muscle ore pulp drop temperature, causes dilution trap to steam seriously.
The content of the invention
In order to solve above-mentioned technical barrier, the heat of initial steam is made full use of, drop temperature is dodged at the end for reducing dissolved mineral slurry,
Reduce dilution trap to steam, the invention provides the method and device that a kind of brand-new dissolution heat integration utilizes, can not only drop
Drop temperature is dodged at low dissolution end, but also can make full use of the heat of initial steam.
For the above-mentioned purpose, the present invention is realized in：
A kind of alumina producing mesohigh dissolution heat integration Application way, it is characterised in that：Raw ore slurry is ground and sent
Ore pulp dodge exhaust steam using dissolution end and be heated to 80~90 DEG C, recycle live steam condensed water to be heated to 100~102 DEG C, will be molten
Go out live steam condensed water to be used for heating the dissolved mineral slurry after exhaust steam preheats and the pre-desiliconizing ore pulp after exhaust steam preheating successively.
Described dissolved mineral slurry cools by 10~12 grades of flash distillations, and it is 115~125 DEG C that drop temperature is dodged at end.
Live steam condensed water temperature with dissolved mineral slurry heat exchange is 280~300 DEG C.
Live steam condensed water temperature with pre-desiliconizing ore pulp heat exchange is 220~250 DEG C.
Again with pre-desiliconizing ore pulp heat exchange, the condensed water after heat exchange directly returns live steam condensed water after being exchanged heat with dissolved mineral slurry
The higher-pressure deaerator of steam power plant.
The present invention further discloses a kind of alumina producing mesohigh dissolution heat integration to utilize device, including ore pulp pipe
It is road, pre-desiliconizing ore pulp heat exchange device, desiliconization slot, membrane pump, dissolved mineral slurry heat exchanger, digester, flash-pot, exhaust steam pipeline, new
Steam condensate (SC) pipeline；Ore slurry pipeline transfer ore pulp to the first pre-desiliconizing ore pulp heat exchange device, the first pre-desiliconizing ore pulp heat exchange device with
Second pre-desiliconizing ore pulp heat exchange device is connected；Second pre-desiliconizing ore pulp heat exchange device connects desiliconization slot；Ore pulp and kind point in desiliconization slot
Chopped-off head dissolved mineral slurry heat exchanger is pumped into barrier film after mother liquor mixing, chopped-off head dissolved mineral slurry heat exchanger exchanges heat with multigroup dissolved mineral slurry
Device is connected；Final stage dissolved mineral slurry heat exchanger and initial steam pipeline communication；Final stage dissolved mineral slurry heat exchanger and penultimate stage dissolution
Ore pulp heat exchange device passes through live steam condensed water pipeline communication；Penultimate stage dissolved mineral slurry heat exchanger passes through live steam condensed water pipe
Road connects the second pre-desiliconizing ore pulp heat exchange device；Final stage dissolved mineral slurry heat exchanger is connected with digester；Digester connection is connected more
Group flash-pot；Chopped-off head flash-pot connects chopped-off head dissolved mineral slurry heat exchanger by exhaust steam pipeline；Flash-pot passes through exhaust steam pipe
Road connects the first pre-desiliconizing ore pulp heat exchange device.
The pre-desiliconizing ore pulp heat exchange device is indirect heat exchanger.
Final stage flash-pot connects the first pre-desiliconizing ore pulp heat exchange device by exhaust steam pipeline.
To reach different heating-up temperatures, last 3 grades of flash-pots can also be used pre- by exhaust steam pipeline connection first
Desiliconization ore pulp heat exchange device.
Advantages of the present invention and effect are as follows：
Present invention mainly solves current domestic alumina producer end to dodge drop temperature height, and digestion series heat utilization efficiency is low, dilute
Groove is released to steam the problem of serious.Using this technique, the heat of initial steam can be made full use of, while and can reduces dissolution end and lightened
Material temperature degree, reduce the steam consumption of digestion series.
Brief description of the drawings
Fig. 1 is present invention process schematic diagram.
Embodiment
The implementation combination accompanying drawing example of invention is described in detail in below, but protection scope of the present invention is not by embodiment institute
Limit.
As shown in figure 1, the present invention includes ore slurry pipeline 1, pre-desiliconizing ore pulp heat exchange device 2, desiliconization slot 3, membrane pump 4, dissolution
Ore pulp heat exchange device 5, digester 6, flash-pot 7, exhaust steam pipeline 8, live steam condensed water pipeline 9；The transfer ore pulp of ore slurry pipeline 1 is extremely
First pre-desiliconizing ore pulp heat exchange device 2, the first pre-desiliconizing ore pulp heat exchange device 2 are connected with the second pre-desiliconizing ore pulp heat exchange device 21；Second
Pre-desiliconizing ore pulp heat exchange device 21 connects desiliconization slot 3；Ore pulp in desiliconization slot 3 with membrane pump 4 is sent to head after being mixed with seed precipitation solution
Level dissolved mineral slurry heat exchanger 5, chopped-off head dissolved mineral slurry heat exchanger 5 is connected with multigroup dissolved mineral slurry heat exchanger；Final stage dissolved mineral slurry changes
Hot device 5 and initial steam pipeline communication；Final stage dissolved mineral slurry heat exchanger 5 is with penultimate stage dissolved mineral slurry heat exchanger 5 by newly steaming
Vapour condensing water conduit 9 connects；Penultimate stage dissolved mineral slurry heat exchanger 5 is pre- de- by the connection of live steam condensed water pipeline 9 second
Silicon ore pulp heat exchange device 21；Final stage dissolved mineral slurry heat exchanger 5 is connected with digester 6；Multigroup flash-pot of the connection series connection of digester 6
7；Chopped-off head flash-pot 7 connects chopped-off head dissolved mineral slurry heat exchanger 5 by exhaust steam pipeline 8；Flash-pot 7 is connected by exhaust steam pipeline 8
Connect the first pre-desiliconizing ore pulp heat exchange device 2.
The pre-desiliconizing ore pulp heat exchange device is indirect heat exchanger.
Final stage flash-pot 7 connects the first pre-desiliconizing ore pulp heat exchange device 2 by exhaust steam pipeline 8.
With reference to specific embodiment, the present invention will be further described.
Embodiment 1
The method and device that a kind of alumina producing mesohigh dissolution heat integration utilizes, flow are as follows：By a hydraulic aluminium
Stone ore carries out ore grinding after being mixed with seed precipitation solution, temperature is 75.4 DEG C after ore grinding；Qualified ore pulp after grinding delivers to pre-desiliconizing set
Heat exchange of heat pipe heats.1st grade of preheating cannula exit temperature is 80 DEG C, and thermal source used is weary for the 11st grade of flash-pot flash distillation of dissolution
Vapour, the outlet temperature of the 2nd grade of pre- thermal sleeve are 100 DEG C, and thermal source used is 220 DEG C of live steam condensed waters, the condensed water after heat exchange
Temperature is 158 DEG C.Ore pulp after desiliconization is pumped into dissolving-out cannula heat exchanger with barrier film after being mixed with seed precipitation solution and is heated to dissolution
Temperature.Thermal source used in preceding 10 grades of double-tube heat exchangers is followed successively by the 10th grade of flash distillation exhaust steam to the 1st grade of flash-pot, and ore pulp is by 10 grades
Exhaust steam is preheating to 215.4 DEG C；11st grade of thermal source used in double-tube heat exchanger is 280 DEG C of condensed waters, and ore pulp is pre- by live steam condensed water
Heat is to 221.4 DEG C；The initial steam bringing-up section thermal source of ore pulp is 285 DEG C of saturation initial steams, and dissolved mineral slurry is heated into 265 DEG C.Add
Heat is cooled to 115 DEG C step by step after digester stops dissolution to the dissolved mineral slurry of leaching temperature by 11 grades of flash-pot flash distillations.
Embodiment 2
The method and device that a kind of alumina producing mesohigh dissolution heat integration utilizes, flow are as follows：By a hydraulic aluminium
Stone ore carries out ore grinding after being mixed with seed precipitation solution, temperature is 74 DEG C after ore grinding；Qualified ore pulp after grinding delivers to pre-desiliconizing sleeve pipe
Heat exchanger heats.1st grade of preheating cannula exit temperature is 90 DEG C, and thermal source used flashes for the 8th, 9,10 grade of flash-pot of dissolution
Exhaust steam, the outlet temperature of the 2nd grade of pre- thermal sleeve are 102 DEG C, and thermal source used is 250 DEG C of live steam condensed waters, the condensation after heat exchange
Coolant-temperature gage is 158 DEG C.Ore pulp after desiliconization mixed with seed precipitation solution after with barrier film be pumped into dissolving-out cannula heat exchanger be heated to it is molten
Go out temperature.Thermal source used in preceding 9 grades of double-tube heat exchangers is followed successively by the 9th grade of flash distillation exhaust steam to the 1st grade of flash-pot, and ore pulp is by 9 grades
Exhaust steam is preheating to 205.8 DEG C；10th grade of thermal source used in double-tube heat exchanger is 290 DEG C of condensed waters, and ore pulp is pre- by live steam condensed water
Heat is to 212.8 DEG C；Initial steam bringing-up section thermal source is 280 DEG C of saturation initial steams, and dissolved mineral slurry is heated into 260 DEG C.It is heated to molten
The dissolved mineral slurry for going out temperature is cooled to 125 DEG C step by step after digester stops dissolution by 10 grades of flash-pot flash distillations.
Embodiment 3
The method and device that a kind of alumina producing mesohigh dissolution heat integration utilizes, flow are as follows：By a hydraulic aluminium
Stone ore carries out ore grinding after being mixed with seed precipitation solution, temperature is 74 DEG C after ore grinding；Qualified ore pulp after grinding delivers to pre-desiliconizing sleeve pipe
Heat exchanger heats.1st grade of preheating cannula exit temperature is 90 DEG C, and thermal source used flashes for the 8th, 9,10 grade of flash-pot of dissolution
Exhaust steam, the outlet temperature of the 2nd grade of pre- thermal sleeve are 102 DEG C, and thermal source used is 240 DEG C of live steam condensed waters, the condensation after heat exchange
Coolant-temperature gage is 158 DEG C.Ore pulp after desiliconization mixed with seed precipitation solution after with barrier film be pumped into dissolving-out cannula heat exchanger be heated to it is molten
Go out temperature.Thermal source used in preceding 9 grades of double-tube heat exchangers is followed successively by the 9th grade of flash distillation exhaust steam to the 1st grade of flash-pot, and ore pulp is by 9 grades
Exhaust steam is preheating to 205.8 DEG C；10th grade of thermal source used in double-tube heat exchanger is 300 DEG C of condensed waters, and ore pulp is pre- by live steam condensed water
Heat is to 212.8 DEG C；Initial steam bringing-up section thermal source is 280 DEG C of saturation initial steams, and dissolved mineral slurry is heated into 260 DEG C.It is heated to molten
The dissolved mineral slurry for going out temperature is cooled to 120 DEG C step by step after digester stops dissolution by 10 grades of flash-pot flash distillations.
Claims (5)
- A kind of 1. alumina producing mesohigh dissolution heat integration Application way, it is characterised in that：Raw ore slurry is ground what is sent Ore pulp dodges exhaust steam using dissolution end and is heated to 80~90 DEG C, recycles live steam condensed water to be heated to 100~102 DEG C, by dissolution Live steam condensed water is used for heating the dissolved mineral slurry after exhaust steam preheats and the pre-desiliconizing ore pulp after exhaust steam preheating successively；With dissolution ore deposit Slurry heat exchange after live steam condensed water again with pre-desiliconizing ore pulp heat exchange, the high pressure deoxygenation of the direct backheat power plant of condensed water after heat exchange Device；The device used includes ore slurry pipeline (1), pre-desiliconizing ore pulp heat exchange device (2), desiliconization slot (3), membrane pump (4), dissolution ore deposit Starch heat exchanger (5), digester (6), flash-pot (7), exhaust steam pipeline (8), live steam condensed water pipeline (9)；Ore slurry pipeline (1) Transfer ore pulp is to the first pre-desiliconizing ore pulp heat exchange device (2), the first pre-desiliconizing ore pulp heat exchange device (2) and the second pre-desiliconizing ore pulp heat exchange Device (21) is connected；Second pre-desiliconizing ore pulp heat exchange device (21) connection desiliconization slot (3)；Ore pulp and seed precipitation solution in desiliconization slot (3) After mixing chopped-off head dissolved mineral slurry heat exchanger (5), chopped-off head dissolved mineral slurry heat exchanger (5) and multigroup dissolution ore deposit are sent to membrane pump (4) Starch heat exchanger series connection；Final stage dissolved mineral slurry heat exchanger (5) and initial steam pipeline communication；Final stage dissolved mineral slurry heat exchanger (5) is with falling Number second level dissolved mineral slurry heat exchanger (5) is connected by live steam condensed water pipeline (9)；Penultimate stage dissolved mineral slurry heat exchanger (5) the second pre-desiliconizing ore pulp heat exchange device (21) is connected by live steam condensed water pipeline (9)；Final stage dissolved mineral slurry heat exchanger (5) It is connected with digester (6)；Multigroup flash-pot (7) of digester (6) connection series connection；Chopped-off head flash-pot (7) passes through exhaust steam pipe Road (8) connection chopped-off head dissolved mineral slurry heat exchanger (5)；Flash-pot (7) connects the first pre-desiliconizing ore pulp by exhaust steam pipeline (8) and changed Hot device (2)；Final stage flash-pot (7) connects the first pre-desiliconizing ore pulp heat exchange device (2) by exhaust steam pipeline (8)；Last 3 grades of flash-pots (7) connect the first pre-desiliconizing ore pulp heat exchange device (2) by exhaust steam pipeline (8).
- 2. the high pressure digestion heat integration Application way in alumina producing according to claim 1, it is characterised in that：Institute The dissolved mineral slurry stated cools by 10~12 grades of flash distillations, and it is 115~125 DEG C that drop temperature is dodged at end.
- 3. the high pressure digestion heat integration Application way in alumina producing according to claim 1, it is characterised in that：With The live steam condensed water temperature of dissolved mineral slurry heat exchange is 280~300 DEG C.
- 4. the high pressure digestion heat integration Application way in alumina producing according to claim 1, it is characterised in that：With The live steam condensed water temperature of pre-desiliconizing ore pulp heat exchange is 220~250 DEG C.
- 5. the high pressure digestion heat integration Application way in alumina producing according to claim 1, it is characterised in that：Institute It is indirect heat exchanger to state pre-desiliconizing ore pulp heat exchange device.
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| CN201510126491.9A CN106145166B (en) | 2015-03-23 | 2015-03-23 | A kind of alumina producing mesohigh dissolution heat integration Application way and device |
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| CN106145166B true CN106145166B (en) | 2018-01-12 |
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| CN107915244A (en) * | 2018-01-02 | 2018-04-17 | 东北大学设计研究院（有限公司） | A kind of process unit and method of gibbsitic bauxite twin driving |
| CN110817915A (en) * | 2019-11-25 | 2020-02-21 | 沈阳铝镁设计研究院有限公司 | Method and device for reducing steam consumption in alumina production |
| CN112537790B (en) * | 2020-12-15 | 2024-06-04 | 山东南山铝业股份有限公司 | High-low temperature combined digestion unit for Bayer process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6555076B1 (en) * | 1998-10-01 | 2003-04-29 | Gea Kestner | Bauxite ore digestion in the bayer process |
| CN1597524A (en) * | 2004-07-23 | 2005-03-23 | 山东铝业股份有限公司 | Bauxite low temperature continuous dissolving out technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5545809A (en) * | 1978-09-20 | 1980-03-31 | Denki Kagaku Kogyo Kk | Production of alumina fiber |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6555076B1 (en) * | 1998-10-01 | 2003-04-29 | Gea Kestner | Bauxite ore digestion in the bayer process |
| CN1597524A (en) * | 2004-07-23 | 2005-03-23 | 山东铝业股份有限公司 | Bauxite low temperature continuous dissolving out technology |
Non-Patent Citations (1)
| Title |
|---|
| 管道化溶出设计探讨;唐时健;《轻金属》;20111231;第78页左栏第2段至第79页右栏第4段 * |
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