CN103030161A - Application of filter cake of leaf filter - Google Patents
Application of filter cake of leaf filter Download PDFInfo
- Publication number
- CN103030161A CN103030161A CN2012105622007A CN201210562200A CN103030161A CN 103030161 A CN103030161 A CN 103030161A CN 2012105622007 A CN2012105622007 A CN 2012105622007A CN 201210562200 A CN201210562200 A CN 201210562200A CN 103030161 A CN103030161 A CN 103030161A
- Authority
- CN
- China
- Prior art keywords
- leaf
- filter
- filter cake
- application
- stripping
- 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.)
- Granted
Links
Abstract
The invention discloses application of a filter cake of a leaf filter. In the application, the filter cake of the leaf filter, which is generated in the alumina production, is used as an additive to be applied to catalyze dissolution of aluminium oxide in monohydrate bauxite ore. The application can effectively catalyze dissolution of the aluminium oxide, adopts a simple process and has a good industrial application prospect.
Description
Technical field
The present invention relates to the application of leaf filter filter cake, belong to the alumina producing industrial circle.
Technical background
In alumina producing, obtain respectively thick liquid and red mud after the dissolved mineral slurry diluted settlement, contain a large amount of sestons in the thick liquid and need to carry out leaf and filter to make the fine red mud in the thick liquid to separate with sodium aluminate solution, be seminal fluid and obtain pure sodium aluminate solution.Red mud particle particle in the thick liquid is less, and the comparatively closely knit filter cloth of easily blocking of filter cake that forms when leaf is filtered is produced and reduce the impact of leaf filtering velocity degree, in order to solve such problem, alumina producer filters at leaf and generally adds lime in the journey as filtration medium, improves leaf filter efficient, improves its production capacity.
The lime that adds during the leaf filter and sodium aluminate solution reaction, form aluminate hydrates DFP filter cake, filter cake generally adds the laterite washing flow process after the leaf filter, is sent to red mud dump with red mud, becomes waste material, direct abandonment can cause the wasting of resources and production cost to increase after the leaf filter, particularly when production was unstable, in order to guarantee the effect of leaf filter, the amount of lime of interpolation was larger, the filter cake amount that produces after the leaf filter is large, and the impact that this wasting of resources and production cost increase is particularly serious.
At present, for the application of filter cakes of leaf filter seldom, horse naval in " about improving the discussion of Bayer process factory causticization process " literary composition (" light metal " 2012 the 6th phase the 9th page) proposition the causticizing agent during as the Bayer process causticization replaces making of milk of lime with the leaf filter cake, be used for causticization; In addition, again without any relevant report of utilizing filter cakes of leaf filter.
Summary of the invention
The object of the present invention is to provide the application of leaf filter filter cake, with the stripping of leaf filter filter cake as aluminium sesquioxide in the catalyzer efficient catalytic monohydrate bauxite ore.
The invention provides the application of leaf filter filter cake, this application is that the leaf that will produce in the alumina producing is filtered filter cake as the stripping of additive application aluminium sesquioxide in the catalysis monohydrate bauxite ore.
Above-mentioned application is in alumina producing, adds lime in the thick liquid of dissolved mineral slurry, by after the leaf filter slurries that obtain being refiltered, perhaps the slurries that obtain after the leaf filter is carried out filtering after the sedimentation; The leaf that obtains after filtration filter filter cake adds to as leaching additive in the circulating mother liquor in monohydrate bauxite ore stripping stage and is applied to catalysis Al
2O
3Stripping.
Leaf filter filter cake after filtering in the above-mentioned application comprises the calcium aluminate compound of aluminate hydrates DFP, in the leaf filter filter cake take the mass content of CaO form metering as 20 ~ 60%, with Al
2O
3The mass content of form metering is 10 ~ 40%.
Solid content in the filter cake slurries in the above-mentioned application after sedimentation is controlled at 300 ~ 900g/L.
In the above-mentioned application leaf filter cake is added in the bauxite stripping as leaching additive, consumption is 0.5 ~ 50% of bauxite quality; Be preferably 15 ~ 35%.
The present invention is the large quantity research of contriver by the monohydrate bauxite ore stripping is carried out, the stripping that the leaf filter filter cake that mainly contains hydration tricalcium aluminate composition that interpolation lime forms when finding the leaf filter has aluminium sesquioxide has catalytic activity, can be used as additive and come Partial Replacement lime, stripping is played katalysis; Leaf filter filter cake is that a kind of aluminate hydrates DFP main component that comprised is at interior compound, these compounds can make bauxite not be subjected to the impact of titanium-containing compound when stripping, be conducive to mass transfer process, thereby accelerate the speed of stripping, this catalytic mechanism also is the comprehensive catalytic process of a complexity; Find that simultaneously aluminium element in the leaf filter filter cake can enter sodium aluminate solution and is recovered in process in leaching, also reclaimed the aluminium component in the leaf filter filter cake when having reached catalysis.
Application of the present invention has following advantage:
The present invention utilize industry generally as the leaf filter filter cake of the cheapness of offal treatment as additive, improved to a great extent the solubility rate of aluminium sesquioxide in the monohydrate bauxite ore; Can reclaim the aluminium component in the filter cake; Technique of the present invention is simple, therefore has preferably prospects for commercial application.
Embodiment:
The following examples can make those skilled in the art understand more all sidedly the present invention, but do not limit the present invention in any way, and content of the present invention is not limited to this fully.
In order better to understand this patent content, employed symbol definition is as follows in the invention book:
R
P: the ratio of aluminum oxide and caustic alkali mass concentration in the sodium aluminate solution;
Na
2O
K: caustic alkali, the alkali that exists with sodium aluminate and NaOH form in the expression sodium aluminate solution is with Na
2The O meter, g/L;
Na
2O
C: carbonic acid alkali, expression is with Na
2CO
3The alkali that form exists is with Na
2The O meter, g/L;
Na
2O
T: full alkali, Na
2O
KAnd Na
2O
CSummation, g/L;
η
Phase: alumina phase is to solubility rate, %;
Al
2O
3: alumina content, with Al
2O
3Form represents the aluminium in the sodium aluminate solution, g/L.
Stripping reaction is carried out in volume is the steel bomb reactor of 120ml, the circulating mother liquor that uses among Comparative Examples and the embodiment is the circulating mother liquor of China's alumina producer, because the asynchronism(-nization) of sampling, its composition is slightly different, concrete composition is as shown in table 1, each circulating mother liquor 100ml that uses during stripping.Employed ore is the bauxite of the use of Chongqing alumina producer, and its composition is as shown in table 2, and wherein mainly containing the aluminium phase is a diaspore type.The leaf filter filter cake that uses is the leaf filter filter cake of Chongqing alumina producer, and its main component is the aluminate hydrates DFP, for calculating accurately, uses after filter cake is dried in 100 ℃ of baking ovens, and concrete composition is as shown in table 3.The stripping temperature of reaction is 240 ℃, and the reaction times is 1h.After the stripping reaction finishes, filtered while hot, and get the solution sample, the content of aluminum oxide and caustic alkali, total alkali in the methods analyst solution of use chemistry titration.
The composition of table 1 circulating mother liquor
| Composition | Al 2O 3（g/L） | Na 2O k（g/L） | Na 2O T（g/L） | Rp |
| Circulating mother liquor a | 109.7 | 206.5 | 227.0 | 0.531 |
| Circulating mother liquor b | 118.6 | 222.5 | 240.7 | 0.533 |
[0025]Table 2 bauxite composition
| Composition | Al 2O 3（%） | SiO 2（%） | TiO 2（%） | Fe 2O 3（%） | A/S |
| Content | 58.56 | 16.06 | 2.83 | 5.76 | 3.65 |
Table 3 filter cake main component
| Composition | Al 2O 3（%） | CaO（%） |
| Content | 26.50 | 40.59 |
Comparative Examples:
Circulating mother liquor a100mL, bauxite 18.86g does not allocate any additive in autoclave, stirs, and carries out the stripping reaction.Solution composition after the stripping and the red mud composition such as following table 4 and the table 5 that obtain, the alumina content in the solution after the stripping is 115.5g/L, the relative solubility rate of aluminum oxide is 5.25%.
The composition of liquid after the stripping of table 4 Comparative Examples
| Composition | Al 2O 3（g/L） | Na 2O k（g/L） | Na 2O T（g/L） | Rp |
| Content | 115.5 | 167.5 | 186.9 | 0.69 |
Obtain the composition of red mud after the stripping of table 5 Comparative Examples
Embodiment 1:
Circulating mother liquor b100mL, bauxite 15.99g adds the leaf filter cake in the autoclave as leaching additive, and the quality of the leaf of interpolation filter filter cake equals 18.95% of bauxite quality, stirs, and carries out the stripping reaction.Solution composition after the stripping and the red mud composition such as following table 6 and the table 7 that obtain, the alumina content in the solution after the stripping is 191.4g/L, the relative solubility rate of aluminum oxide is 77.29%.
The composition of liquid after the stripping of table 6 embodiment 1
| Composition | Al 2O 3（g/L） | Na 2O k（g/L） | Na 2O T（g/L） | Rp |
| Content | 191.4 | 197.3 | 222.8 | 0.97 |
Obtain the composition of red mud after the stripping of table 7 embodiment 1
Embodiment 2:
Circulating mother liquor b100mL, bauxite 15.99g adds filter cake in the autoclave as leaching additive, and the quality of the leaf of interpolation filter filter cake equals 26.95% of bauxite quality, stirs, and carries out the stripping reaction.Solution composition after the stripping and the red mud composition such as following table 8 and the table 9 that obtain, the alumina content in the solution after the stripping is 202.1g/L, the relative solubility rate of aluminum oxide is 84.90%.
The composition of liquid after the stripping of table 8 embodiment 2
| Composition | Al 2O 3（g/L） | Na 2O k（g/L） | Na 2O T（g/L） | Rp |
| Content | 202.1 | 206.8 | 232.6 | 0.9773 |
[0045]Obtain the composition of red mud after the stripping of table 9 embodiment 2
。
Claims (6)
1. the application of leaf filter filter cake is characterized in that, the leaf that produces in the alumina producing is filtered filter cake as the stripping of additive application aluminium sesquioxide in the catalysis monohydrate bauxite ore.
2. application as claimed in claim 1 is characterized in that, in alumina producing, adds lime and carry out the leaf filter in the thick liquid of sedimentation, with the filter cake dope filtration that obtains, perhaps the slurries that obtain after the leaf filter is carried out refiltering after the sedimentation after filtering by leaf; The leaf that obtains after filtration filter filter cake adds to as leaching additive in the circulating mother liquor in monohydrate bauxite ore stripping stage and is applied to catalysis Al
2O
3Stripping.
3. application as claimed in claim 2 is characterized in that, leaf after filtration filter filter cake comprises the calcium aluminate compound of aluminate hydrates DFP, in the leaf filter filter cake take the mass content of CaO form metering as 20 ~ 60%, with Al
2O
3The mass content of form metering is 10 ~ 40%.
4. according to right 2 described methods, it is characterized in that, the solid content in the filter cake slurries after sedimentation is controlled at 300 ~ 900g/L.
5. such as each described application of claim 1 ~ 4, it is characterized in that, the leaf filter cake is added in the bauxite stripping as leaching additive, and its consumption is 0.5 ~ 50% of monohydrate bauxite ore quality.
6. application as claimed in claim 5 is characterized in that, the leaf filter cake is added in the bauxite stripping as leaching additive, and its consumption is 15 ~ 35% of monohydrate bauxite ore quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210562200.7A CN103030161B (en) | 2012-12-21 | 2012-12-21 | Application of filter cake of leaf filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210562200.7A CN103030161B (en) | 2012-12-21 | 2012-12-21 | Application of filter cake of leaf filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103030161A true CN103030161A (en) | 2013-04-10 |
| CN103030161B CN103030161B (en) | 2015-04-08 |
Family
ID=48017625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210562200.7A Expired - Fee Related CN103030161B (en) | 2012-12-21 | 2012-12-21 | Application of filter cake of leaf filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103030161B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152195A (en) * | 2015-08-31 | 2015-12-16 | 中国铝业股份有限公司 | Treatment method and apparatus for controlled filter cakes in Bayer process for alumina production |
| CN113998719A (en) * | 2021-07-28 | 2022-02-01 | 国家电投集团山西铝业有限公司 | Use of leaf filter cake in production of alumina and alumina production method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113001A (en) * | 2007-07-12 | 2008-01-30 | 中国铝业股份有限公司 | Method for producing aluminium oxide by middle-low grade alumyte |
| KR20080082751A (en) * | 2007-03-09 | 2008-09-12 | 케이씨 주식회사 | Manufacturing method of ultra fine aluminum hydroxide |
| CN102398914A (en) * | 2010-09-10 | 2012-04-04 | 中国科学院过程工程研究所 | Method for modifying Bayer process, processing low-grade diaspore bauxite and producing alumina |
| CN102730725A (en) * | 2012-06-21 | 2012-10-17 | 中国铝业股份有限公司 | Method for improving caustic ratio of Barer process seeded precipitation mother solution |
-
2012
- 2012-12-21 CN CN201210562200.7A patent/CN103030161B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080082751A (en) * | 2007-03-09 | 2008-09-12 | 케이씨 주식회사 | Manufacturing method of ultra fine aluminum hydroxide |
| CN101113001A (en) * | 2007-07-12 | 2008-01-30 | 中国铝业股份有限公司 | Method for producing aluminium oxide by middle-low grade alumyte |
| CN102398914A (en) * | 2010-09-10 | 2012-04-04 | 中国科学院过程工程研究所 | Method for modifying Bayer process, processing low-grade diaspore bauxite and producing alumina |
| CN102730725A (en) * | 2012-06-21 | 2012-10-17 | 中国铝业股份有限公司 | Method for improving caustic ratio of Barer process seeded precipitation mother solution |
Non-Patent Citations (3)
| Title |
|---|
| 《轻金属》 20120929 马海军等 "关于改进拜耳法工厂苛化工艺的探讨" 第9-13页 1-6 , 第6期 * |
| 赵骧等: "《催化剂》", 30 April 2001, 中国物资出版社, article "《催化剂》", pages: 3-4 * |
| 马海军等: ""关于改进拜耳法工厂苛化工艺的探讨"", 《轻金属》, no. 6, 29 September 2012 (2012-09-29), pages 9 - 13 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105152195A (en) * | 2015-08-31 | 2015-12-16 | 中国铝业股份有限公司 | Treatment method and apparatus for controlled filter cakes in Bayer process for alumina production |
| CN113998719A (en) * | 2021-07-28 | 2022-02-01 | 国家电投集团山西铝业有限公司 | Use of leaf filter cake in production of alumina and alumina production method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103030161B (en) | 2015-04-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9139445B2 (en) | Method for co-producing alumina and activated calcium silicate from high-alumina fly ash | |
| CN102251119B (en) | Method for recycling vanadium extraction tailings | |
| RU2478574C2 (en) | Method of producing aluminium oxide from medium- and low-grade bauxite | |
| CN101863500B (en) | Method for producing alumina with aluminum-containing metallurgical material | |
| CN104671811B (en) | A kind of method utilizing two sections of acid treatments of aluminous fly-ash to prepare mullite | |
| CN103693665A (en) | Method for preparing high-purity aluminum oxide from fly ash | |
| CN101117230A (en) | Bayer process dissolving-out method | |
| WO2013143335A1 (en) | Method for extracting aluminium oxide in fly ash by alkaline process | |
| CN102730725A (en) | Method for improving caustic ratio of Barer process seeded precipitation mother solution | |
| CN101306928B (en) | Pre- desiliconizing method from fly ash or slag | |
| CN101746795A (en) | Method for producing alumina from bauxite | |
| CN103924090A (en) | Method for producing high-purity vanadium pentoxide by using vanadium-containing waste residues | |
| CN103818969A (en) | Iron oxide red and preparation method thereof | |
| CN103030161B (en) | Application of filter cake of leaf filter | |
| CN104045091A (en) | Method for producing active calcium silicate by using desiliconized alkaline liquor | |
| CN104030331B (en) | A kind of method utilizing aluminous fly-ash to produce aluminium oxide | |
| CN101435027A (en) | Method for recycling high purity molybdenum from molybdenum-containing spent catalyst | |
| CN100593018C (en) | Technological process method of producing aluminium oxide using high aluminium slag | |
| CN107572570A (en) | A kind of method that oxalates is removed in the washing lotion from Bayer process | |
| CN101734694A (en) | Method for excluding sodium oxalate and carbonate from Bayer process solution by adopting ultra-concentration method | |
| CN101397604B (en) | Dense alkali liquid leaching pre-desiliconisation method for bauxite | |
| CN103342377A (en) | Method for removing sodium oxalate from sodium aluminate solution through lime causticization | |
| CN114477256B (en) | Method for producing low-sodium low-iron composite gamma-alumina and co-producing ammonium chloride | |
| US20220324718A1 (en) | Method for preparing basic copper carbonate | |
| CN103663561A (en) | Recycling method of molybdenum in filament-melting waste acid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20171221 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |