CN1556036A - Aluminium oxide production decomposition classification net technology - Google Patents
Aluminium oxide production decomposition classification net technology Download PDFInfo
- Publication number
- CN1556036A CN1556036A CNA2003101210314A CN200310121031A CN1556036A CN 1556036 A CN1556036 A CN 1556036A CN A2003101210314 A CNA2003101210314 A CN A2003101210314A CN 200310121031 A CN200310121031 A CN 200310121031A CN 1556036 A CN1556036 A CN 1556036A
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- CN
- China
- Prior art keywords
- rotary device
- centrifugal rotary
- decomposer
- decomposing
- feed
- 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.)
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000000354 decomposition reaction Methods 0.000 title claims description 12
- 238000005516 engineering process Methods 0.000 title description 4
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 6
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 11
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 11
- 239000012452 mother liquor Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 210000005239 tubule Anatomy 0.000 claims description 3
- 238000007865 diluting Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- -1 hydrogen aluminum hydride Chemical class 0.000 description 3
- 206010039509 Scab Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001648 diaspore Inorganic materials 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
A decomposing and classifying process for producing aluminium oxide includes decomposing the solution of sodium aluminate, feeding the decomposed slurry in centrifugal cyclone whild diluting the slurry by filtered mother liquid, returning the overflowed liquid back to decomposing tank, collecting the fluid from the bottom of cyclone, and liquid-solid separation to obtain the solid aluminium oxide. Its advantages are high strength and warse granularity.
Description
Technical field:
The present invention relates to a kind of alumina producing decomposing grading technology.
Technical background:
The decomposer of present domestic alumina producing all adopts pneumatic blending, under the leaching condition of high pressure digester, handle the diaspore ore of indissoluble, owing to decompose original liquid concentration height, molecular ratio height, produce sandy alumina with concentration and the high solution of molecular ratio, be difficult to reach granularity, the requirement of strength of sandy alumina.In addition, former employing cyclo-fine screen is as stage equipment, and because of feed pressure does not reach requirement, sieve is easy to wear, distortion, and the flow process complexity is difficult to many reasons such as operation control, and grading effect does not reach requirement, and the working cost height.
Therefore, under the condition that will keep strength of solution and rate of decomposition at present, produce sandy alumina, except rational decomposition outside-the-system, also need study the classification of the hydrogen aluminum hydride slurries after the decomposition, make thicker hydrogen aluminum hydride as product, to guarantee that product granularity meets the requirements, thin hydrogen aluminum hydride is returned decomposer as seed and is continued to grow up.
Summary of the invention:
The objective of the invention is to: provide a kind of decomposing grading technology that makes product granularity, intensity all can reach processing requirement, to solve prior art problems.
The present invention is achieved in that sodium aluminate solution enters after the decomposer decomposition, utilize the difference of altitude of decomposer and Centrifugal rotary device, make the decomposition slurries adopt the self-pressing type feeding manner to enter Centrifugal rotary device from decomposer, simultaneously, opening for feed at Centrifugal rotary device connects a kind of minute mother liquor pipe, and after filtering mother liquor is diluted slip through feed-pipe, and the feed pressure of Centrifugal rotary device is controlled at 0.03～0.1Mpa, charging contains admittedly and is controlled at about 500g/l, and the overflow of Centrifugal rotary device is returned decomposer by sump and made seed; Underflow send band filter to carry out liquid-solid separation through the underflow groove, and liquid is seed precipitation solution, and solid is the aluminium hydroxide product.
When decomposing slurries hydroxide particle-size-6 μ in the system greater than 1.8% the time, send band filter to filter by row's tubule the Centrifugal rotary device overflow, the aluminium hydroxide of fine particle is got rid of outside the big flow process, obtain thin aluminium hydroxide product.
Dregs separating device also was housed before the opening for feed of Centrifugal rotary device.
The present invention compared with prior art has the following advantages:
1, the Centrifugal rotary device feeding manner is because adopted the self-pressing type feeding manner, and feed pressure is highly stable, does not need the pump delivery charging, has saved the energy;
2, the aluminium hydroxide of design row fine workmanship process flow has solved decomposition granularity period refinement problem effectively;
3, increased the Centrifugal rotary device charging and added mother liquor, solved a high difficult problem that contains ore pulp grading effect difference admittedly effectively towards rare technology;
4, dregs separating device is installed before the Centrifugal rotary device charging, for prevent to scab piece and foreign material enter Centrifugal rotary device, improved grading effect and play a good role.
Description of drawings:
Accompanying drawing 1 is a process flow sheet of the present invention.
Embodiment:
Embodiments of the invention: sodium aluminate solution enters after the decomposer decomposition, utilize the difference of altitude of decomposer and Centrifugal rotary device, make the decomposition slurries adopt the self-pressing type feeding manner to enter Centrifugal rotary device from decomposer, like this, can guarantee the stable of Centrifugal rotary device feed pressure, do not need again to carry, saved the energy with pump.Simultaneously, connect a kind of minute mother liquor pipe at the opening for feed of Centrifugal rotary device, with decompose slurries after filtering the filtrate of gained through feed-pipe slip is diluted, efficiently solve a high difficult problem that contains ore pulp grading effect difference admittedly.The feed pressure of Centrifugal rotary device is controlled at 0.03～0.1Mpa by the valve on the feed-pipe, and charging contains admittedly and is controlled at about 500g/l, and grading effect is :-320 of fed slurry
#Grain size content and underflow difference reach more than 5 percentage points, have satisfied processing requirement.In addition, dregs separating device had been installed also before the opening for feed of Centrifugal rotary device, can prevent to scab piece and foreign material enter Centrifugal rotary device, have improved grading effect, also can prevent the obstruction of Centrifugal rotary device bottom, have guaranteed the normal running of Centrifugal rotary device.The overflow of Centrifugal rotary device is returned decomposer by sump and is continued to grow up as seed; Underflow send band filter to carry out liquid-solid separation through the underflow groove, and liquid is seed precipitation solution, and solid is the aluminium hydroxide product.When decomposing slurries hydroxide particle-size-6 μ greater than 1.8% the time, in order to guarantee the granularity of aluminium hydroxide product, send band filter to filter by row's tubule the Centrifugal rotary device overflow, the aluminium hydroxide of fine particle is got rid of outside the big flow process, obtain thin aluminium hydroxide product.This row fine workmanship's process flow can carry out in time, effectively adjust decomposing the granularity refinement situation, has solved decomposition granularity period refinement problem effectively.
Claims (3)
1, a kind of alumina producing decomposing grading novel process, it is characterized in that: sodium aluminate solution enters after the decomposer decomposition, utilize the difference of altitude of decomposer and Centrifugal rotary device, make the decomposition slurries adopt the self-pressing type feeding manner to enter Centrifugal rotary device from decomposer, simultaneously, opening for feed at Centrifugal rotary device connects a kind of minute mother liquor pipe, mother liquor is after filtering diluted slip through feed-pipe, the feed pressure of Centrifugal rotary device is controlled at 0.03～0.1Mpa, charging contains admittedly and is controlled at about 500g/l, and the overflow of Centrifugal rotary device is returned decomposer by sump and made seed; Underflow send band filter to carry out liquid-solid separation through the underflow groove, and liquid is seed precipitation solution, and solid is the aluminium hydroxide product.
2, alumina producing decomposing grading novel process according to claim 1, it is characterized in that: when decomposing slurries hydroxide particle-size-6 μ in the system greater than 1.8% the time, send band filter to filter by row's tubule the Centrifugal rotary device overflow, the aluminium hydroxide of fine particle is got rid of outside the big flow process, obtained thin aluminium hydroxide product.
3, alumina producing decomposing grading novel process according to claim 1 is characterized in that: dregs separating device also was housed before the opening for feed of Centrifugal rotary device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310121031 CN1266044C (en) | 2003-12-31 | 2003-12-31 | Aluminium oxide production decomposition classification net technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310121031 CN1266044C (en) | 2003-12-31 | 2003-12-31 | Aluminium oxide production decomposition classification net technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1556036A true CN1556036A (en) | 2004-12-22 |
| CN1266044C CN1266044C (en) | 2006-07-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310121031 Expired - Lifetime CN1266044C (en) | 2003-12-31 | 2003-12-31 | Aluminium oxide production decomposition classification net technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN1266044C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383046C (en) * | 2005-07-18 | 2008-04-23 | 贵阳铝镁设计研究院 | Technique for improving solid content of raw pulp |
| CN100406384C (en) * | 2005-11-25 | 2008-07-30 | 中国铝业股份有限公司 | Method for diluting bayer process stripping ore pulp for alumina production by mixed joint process |
| CN113149049A (en) * | 2021-05-13 | 2021-07-23 | 云南文山铝业有限公司 | Grader mother liquor adding self-pressing device and using method thereof |
-
2003
- 2003-12-31 CN CN 200310121031 patent/CN1266044C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383046C (en) * | 2005-07-18 | 2008-04-23 | 贵阳铝镁设计研究院 | Technique for improving solid content of raw pulp |
| CN100406384C (en) * | 2005-11-25 | 2008-07-30 | 中国铝业股份有限公司 | Method for diluting bayer process stripping ore pulp for alumina production by mixed joint process |
| CN113149049A (en) * | 2021-05-13 | 2021-07-23 | 云南文山铝业有限公司 | Grader mother liquor adding self-pressing device and using method thereof |
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| Publication number | Publication date |
|---|---|
| CN1266044C (en) | 2006-07-26 |
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Granted publication date: 20060726 |
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| CX01 | Expiry of patent term |