CN101732913A - Method for filtering and separating red mud in sintering process - Google Patents
Method for filtering and separating red mud in sintering process Download PDFInfo
- Publication number
- CN101732913A CN101732913A CN200910243359A CN200910243359A CN101732913A CN 101732913 A CN101732913 A CN 101732913A CN 200910243359 A CN200910243359 A CN 200910243359A CN 200910243359 A CN200910243359 A CN 200910243359A CN 101732913 A CN101732913 A CN 101732913A
- Authority
- CN
- China
- Prior art keywords
- red mud
- filter
- sintering process
- filtering
- separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000001914 filtration Methods 0.000 title claims abstract description 34
- 238000005245 sintering Methods 0.000 title claims abstract description 29
- 238000000926 separation method Methods 0.000 claims abstract description 31
- 238000005406 washing Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000243 solution Substances 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 10
- 239000000706 filtrate Substances 0.000 claims description 19
- 239000007787 solid Substances 0.000 claims description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 239000003518 caustics Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000004062 sedimentation Methods 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract description 3
- 239000012045 crude solution Substances 0.000 abstract 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000010517 secondary reaction Methods 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 9
- 239000006210 lotion Substances 0.000 description 8
- 238000005201 scrubbing Methods 0.000 description 8
- 229910001710 laterite Inorganic materials 0.000 description 6
- 239000011504 laterite Substances 0.000 description 6
- 238000007598 dipping method Methods 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for filtering and separating red mud in a sintering process, and relates to a method for separating and washing red mud dissolved out from alumina production by the sintering process. A rubber belt filter is adopted to filter the red mud dissolved out in the sintering process; and the method is characterized in that: in the filtering and separating process, after the dissolved-out red mud enters the rubber belt filter, the red mud is subjected to solid-liquid separation first, and filter liquor which is crude solution is subjected to silicon removal; and the red mud separated from the crude solution continuously moves ahead on the filter along with belt filter cloth, and cleaning solution is injected to the red mud after the separation for washing separation. The method can effectively realize quick separation of the red mud dissolved out in the sintering process, reduce secondary reaction loss in a process of dissolving out and separating clinker, and improve the dissolution rate of alumina. Meanwhile, the water quantity for washing the red mud is reduced, the limitation to the sedimentation capacity of the red mud is eliminated, and the concentration of the crude solution after the red mud is separated can be greatly improved, so the production efficiency of the alumina by the sintering process is improved.
Description
Technical field
A kind of method of filtering and separating red mud in sintering process relates to separation and washing methods that a kind of alumina by sintering is produced exsolution red mud.
Technical background
In the alumina by sintering production process, the separation of chamotte exsolution red mud is a key link.At present, most of manufacturers adopt the subsider separating technology.Because subsider is to rely on the principle of Gravity Separation to realize liquid-solid separation, and is thinner when solid particle size, when perhaps difference in specific gravity is very little between the solid-liquid, just is difficult to realize effective sedimentation separation.As thick liquid Al
2O
3Concentration is during greater than 130g/l, and the heavy speed of stripping slurries red mud will be very slow, and sedimentation separation can't realize Separation of Solid and Liquid effectively.In addition, the liquid-solid disengaging time of sedimentation separation technology is long, causes that aluminum oxide secondary loss is high, the grog digesting efficiency of alumina is low, laterite washing waits a series of problems often.
In prior art, a kind of red clay separation process for alumina sintering production (patent No. 200510003224.9) adopts cyclone with bag filter red mud from sintering process to be separated; Process of separating red mud in the alumina by sintering production process (patent No. 01133667.6) adopts revolving-leaf type filter to filter the grog dissolution fluid.Because filter cloth is easily tied hard and can't be regenerated, and does not apply.Thick filtering red mud washing methods (200510200397.x) adopts horizontal belt filter, but only is applicable to the thick filtering red mud washing of high ferro trihydrate aluminium stone ore.Because the easy sex change of sintering process exsolution red mud; dissolution fluid aluminium oxide degree of supersaturation height, the characteristics that alumina concentration is low; utilize rubber belt type filter isolated by filtration exsolution red mud that the hard phenomenon of filter cloth knot can take place usually, make exsolution red mud be difficult to filter, cause to produce and interrupt.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, a kind of quick separation that can effectively realize exsolution red mud is provided, reaches the method that reduces the secondary response loss, improves the filtering and separating red mud in sintering process of solution concentration.
The objective of the invention is to be achieved through the following technical solutions.
A kind of method of filtering and separating red mud in sintering process, adopt rubber belt type filter that the sintering process exsolution red mud is filtered, it is characterized in that its isolated by filtration process is to enter rubber belt type filter at exsolution red mud at first to carry out Separation of Solid and Liquid, filtrate is removed desiliconization process as thick liquid; Continue reach with the belt filter cloth with the red mud after thick liquid separates on filter, the injection of the red mud after separation cleaning solution washs again.
The method of a kind of filtering and separating red mud in sintering process of the present invention, the cleaning solution that it is characterized in that described washing separation process be more than 60 ℃ hot water or more than 60 ℃, caustic sodium concentration is lower than the wash water of 10g/l.
The method of a kind of filtering and separating red mud in sintering process of the present invention is characterized in that its filter filtering surface of described washing separation process adds stay-warm case, logical hot water or steam in stay-warm case, and keeping rubber belt type filter operating environment temperature is 50～95 ℃.
Method of the present invention can realize effectively that the sintering process exsolution red mud separates fast, can reduce secondary response loss in the grog stripping separation process, improves digesting efficiency of alumina.Simultaneously, because the laterite washing water yield reduces, eliminated the restriction of red-mud settlement ability, red mud separates the thick liquid concentration in back and can increase substantially, thereby has improved alumina by sintering production efficiency.
The specific embodiment
A kind of method of filtering and separating red mud in sintering process adopts rubber belt type filter that the sintering process exsolution red mud is filtered, and its isolated by filtration process is to enter rubber belt type filter at exsolution red mud at first to carry out Separation of Solid and Liquid, and filtrate is removed desiliconization process as thick liquid; Continue reach with the belt filter cloth with the red mud after thick liquid separates on filter, the injection of the red mud after separation cleaning solution washs again.
The method of a kind of filtering and separating red mud in sintering process of the present invention, the cleaning solution of described washing separation process be more than 60 ℃ hot water or more than 60 ℃, caustic sodium concentration is lower than the wash water of 10g/l, the red mud of washings on drip washing filter on the filter, washing times can divide 1～5 washing according to production requirement.
The method of a kind of filtering and separating red mud in sintering process of the present invention, described its filter of washing separation process adds stay-warm case, logical hot water or steam in stay-warm case, keeping rubber belt type filter operating environment temperature is 50～95 ℃.
Embodiment 1
Adopt DU type rubber belt type filter, stripping slurry is sent into, after the stripping slurry Separation of Solid and Liquid, to laterite washing, cleaning solution adopts 100 ℃ hot water to red mud, washs 1 time with cleaning solution; Filtrate enters corresponding filtrate receiver.Filter filtering area filtrate is thick liquid, enters thick liquid bath by chute; Filter scrubbing section filtrate is washing lotion, enters the washing lotion groove; Filter cake effluxes.In the filtering red mud process, filter cloth is carried out the processing of regenerating of water flushing and dipping by lye mode; Filtering red mud and scrubbing section be incubated to keep rubber belt type filter operating environment temperature be 95 ℃.
Embodiment 2
Stripping slurry is sent into DU type rubber belt type filter filter, after the stripping slurry Separation of Solid and Liquid, to laterite washing, cleaning solution adopts 60 ℃ hot water to red mud, washs 4 times with cleaning solution; Filtrate enters corresponding filtrate receiver.Filter filtering area filtrate is thick liquid, enters thick liquid bath by chute; Filter scrubbing section filtrate is washing lotion, enters the washing lotion groove; Filter cake effluxes.In the filtering red mud process, filter cloth is carried out the processing of regenerating of water flushing and dipping by lye mode; Filtering red mud and scrubbing section are incubated, and keeping rubber belt type filter operating environment temperature is 60 ℃.
Embodiment 3
Stripping slurry is sent into DU type rubber belt type filter filter, after the stripping slurry Separation of Solid and Liquid, to laterite washing, cleaning solution adopts 90 ℃ hot water to red mud, washs 2 times with cleaning solution; Filtrate enters corresponding filtrate receiver.Filter filtering area filtrate is thick liquid, enters thick liquid bath by chute; Filter scrubbing section filtrate is washing lotion, enters the washing lotion groove; Filter cake effluxes.In the filtering red mud process, filter cloth is carried out the processing of regenerating of water flushing and dipping by lye mode; Filtering red mud and scrubbing section are incubated, and keeping rubber belt type filter operating environment temperature is 95 ℃.
Embodiment 4
Stripping slurry is sent into DU type rubber belt type filter filter, after the stripping slurry Separation of Solid and Liquid, to laterite washing, 60-65 ℃ of cleaning solution employing, caustic sodium concentration are the wash water of 9g/l to red mud, wash 5 times with cleaning solution; Filtrate enters corresponding filtrate receiver.Filter filtering area filtrate is thick liquid, enters thick liquid bath by chute; Filter scrubbing section filtrate is washing lotion, enters the washing lotion groove; Filter cake effluxes.In the filtering red mud process, filter cloth is carried out the processing of regenerating of water flushing and dipping by lye mode; Filtering red mud and scrubbing section are incubated, and keeping rubber belt type filter operating environment temperature is 50 ℃.
Claims (3)
1. the method for a filtering and separating red mud in sintering process, adopt rubber belt type filter that the sintering process exsolution red mud is filtered, it is characterized in that its isolated by filtration process is to enter rubber belt type filter at exsolution red mud at first to carry out Separation of Solid and Liquid, filtrate is removed desiliconization process as thick liquid; Continue reach with the belt filter cloth with the red mud after thick liquid separates on filter, the injection of the red mud after separation cleaning solution washs again.
2. the method for a kind of filtering and separating red mud in sintering process according to claim 1, the cleaning solution that it is characterized in that described washing separation process be more than 60 ℃ hot water or more than 60 ℃, caustic sodium concentration is lower than the wash water of 10g/l.
3. the method for a kind of filtering and separating red mud in sintering process according to claim 1 is characterized in that described its filter of washing separation process adds stay-warm case, and by vapours, keeping rubber belt type filter operating environment temperature is 50～95 ℃ in insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910243359A CN101732913A (en) | 2009-12-18 | 2009-12-18 | Method for filtering and separating red mud in sintering process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910243359A CN101732913A (en) | 2009-12-18 | 2009-12-18 | Method for filtering and separating red mud in sintering process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101732913A true CN101732913A (en) | 2010-06-16 |
Family
ID=42457252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910243359A Pending CN101732913A (en) | 2009-12-18 | 2009-12-18 | Method for filtering and separating red mud in sintering process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101732913A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106315638A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Red mud washing method by sintering method in production process of aluminum oxide and system thereof |
| CN106315646A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Bayer process red mud washing method and system thereof in production process of aluminum oxide |
-
2009
- 2009-12-18 CN CN200910243359A patent/CN101732913A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106315638A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Red mud washing method by sintering method in production process of aluminum oxide and system thereof |
| CN106315646A (en) * | 2015-07-03 | 2017-01-11 | 北京华索科技股份有限公司 | Bayer process red mud washing method and system thereof in production process of aluminum oxide |
| CN106315646B (en) * | 2015-07-03 | 2019-01-22 | 北京华索科技股份有限公司 | Bayer process red mud washing methods and its system in a kind of aluminum oxide production process |
| CN106315638B (en) * | 2015-07-03 | 2019-01-22 | 北京华索科技股份有限公司 | Red mud from sintering process washing methods and its system in a kind of aluminum oxide production process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103030160A (en) | Method for recycling alumina and sodium oxide from bayer process red mud | |
| CN100572277C (en) | A kind of method of improved producing alumina through series process | |
| CN101575111B (en) | System and method for removing oxalate in sodium aluminate solution | |
| CN104477956A (en) | Technique for rapid separation and red-mud washing of sodium aluminate solution | |
| CN104058433B (en) | Process for fast sodium aluminate solution separation and red mud washing | |
| CN101306928B (en) | Pre- desiliconizing method from fly ash or slag | |
| CN103030162B (en) | A kind of method preparing sodium aluminate solid from Bayer process red mud | |
| CN100998964A (en) | Series red mud clinker dissolving out and red mud separation technology | |
| CN101570340A (en) | Separating and washing method of red mud by Bayer process | |
| CN102092752B (en) | Technology for removing oxalate in Bayer process | |
| CN101648769B (en) | Flow separation and leaf filtration process for red mud settlement separating coarse liquid and red mud washing liquid and system therefor | |
| CN101732913A (en) | Method for filtering and separating red mud in sintering process | |
| CN107235501A (en) | The method that low-grade bauxite low temperature alkali soluble produces aluminum oxide by-product silicon product | |
| CN103183349A (en) | Recovery method for silicon carbide and polyethyleneglycol cutting fluids in waste cutting mortar for silicon wafer | |
| CN104743586B (en) | The combine production method of the leaching of aluminium alkali and alumina decomposition mother liquid evaporation salt discharge in a kind of Bayer process red mud | |
| CN206184114U (en) | Methyl alcohol system for alkene chilled water (chw) make up filtration system | |
| CN102897809A (en) | Method and equipment for separating and washing fly ash calcium silicate slag | |
| CN108821316A (en) | A kind of preparation method of desiliconization flyash | |
| CN102642854B (en) | Treatment method of red mud in Bayer process production flow of aluminum oxide | |
| CN201324566Y (en) | Leaf filtering system | |
| WO2010135856A1 (en) | Process for producing aluminum hydroxide or alumina by the bayer process | |
| CN1772617A (en) | Sintering process of separating red mud for alumina production | |
| CN201296674Y (en) | Oxalate eliminating system for sodium aluminate solution | |
| CN103342377B (en) | A kind of sodium aluminate solution lime causticization is except the method for sodium oxalate | |
| CN105417559A (en) | Separation method of red mud in Bayer process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100616 |