CN106219583A - A kind of alumina product Task-size Controlling production method - Google Patents
A kind of alumina product Task-size Controlling production method Download PDFInfo
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- CN106219583A CN106219583A CN201610568069.3A CN201610568069A CN106219583A CN 106219583 A CN106219583 A CN 106219583A CN 201610568069 A CN201610568069 A CN 201610568069A CN 106219583 A CN106219583 A CN 106219583A
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- seminal fluid
- nucleus
- dust collection
- task
- size controlling
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of alumina product Task-size Controlling production method, specifically comprise the following steps that (1) roasting electricity dust collection powder is transported to Task-size Controlling device by powder transporter, roasting electricity dust collection powder is measured by bucket type quantifier, join in agitator, sodium aluminate medium is measured by fluid meter, adds sodium aluminate medium by mixed proportion requirement；(2) it is stirred by agitator so that it is keep uniformly, makes electricity dust collection powder be activated in the process；(3) qualified serosity note people's dashpot is stirred, then according to the content regulation addition of fine particle in the semen volume of production system and the granulometric composition data of serosity and production system；(4) after nucleus joins in seminal fluid, due to seminal fluid action of turbulent flow in pipe so that it is mix homogeneously, the nucleus in system is made to keep uniform and stable；(5) addition point is on final stage seminal fluid board-like outlet seminal fluid pipe.The inventive method is easy to use, improves alumina producing Task-size Controlling using effect.
Description
Technical field
The present invention relates to a kind of alumina product Task-size Controlling production method, belong to alumina product production technical field.
Background technology
During alumina producing Bayer process, granularity fluctuates for each manufacturer, steps not open all together
Technical barrier, its key problem is seminal fluid during decomposing, and the generation of nucleus also exists periodically change, plus system
In organic impact so that problem becomes more complicated.There is no producer at present and can thoroughly solve granularity generation in catabolic process
Periodically variable problem.Product granularity does not reaches prescription, the raw material of down-stream enterprise and energy resource consumption can be brought impact,
The cost making downstream product raises.Therefore, there is strong prescription in down-stream enterprise to product granularity, is to affect downstream product
One key factor of competitiveness.As alumina producing enterprise, the step pursuing product granularity stable does not the most stop, who
Can effectively control alumina product granularity, who just can be in today of production capacity surplus, competition of winning the market.
My analysis in catabolic process nucleus generating period change is presented herein below.The generation of nucleus is not whenever and wherever possible
All occurring, producing nucleus and be conditional on: 1, degree of supersaturation to be had, degree of supersaturation is the biggest, the most easily produces new nucleus.2、
Activity of crystal seed, activity of crystal seed is the poorest is more easily caused new nucleus generation.In process of production, the degree of supersaturation of seminal fluid is often
Being relatively stable, be also controlled, therefore, the impact of seminal fluid degree of supersaturation can be got rid of, and is to compare in activity of crystal seed problem
Complexity, when seed size is less, activity is higher, and along with the growth of seed size, the activity of crystal seed is just deteriorated, when the work of crystal seed
When property is reduced to certain value, under the degree of supersaturation effect that seminal fluid is bigger, new nucleus will be produced.New owing to once producing
Nucleus, its quantity is the biggest, and the activity of crystal seed improves rapidly, is not then having new nucleus to produce in seminal fluid.Be exactly because of
Periodicity for nucleus produces, and causes the cyclic fluctuation of product granularity.
How to understand the Disodium oxalate. impact on control decomposing: Disodium oxalate. precipitation in catabolic process is usually associated with decomposition
The thinning process of granularity, essence is that, before fine particle breaks out, anxious gathering is subtracted by the fine particle quantity in decomposing system
Few, reason is, now produces fine particle in system the most in a large number, and a large amount of particles in system are the most roughened, and mistake
The Kong Jing of filter cloth is much larger than fine particle, and therefore, this is filtered, now, at corase particles with regard to few fine particle is the most substantial amounts of
Between micro gap in, be advantageous for the growth of Disodium oxalate. crystallization, and Disodium oxalate. is needle-shaped crystal structure, it and hydroxide
Aluminum nucleus is compared, the gap between being unfavorable for by crystal seed, thus the fine particle detected in this stage is often particle diameter
Less Disodium oxalate. crystal.Most typical example is that in JIUYUE, 2014 occurs the product granularity thinning process at Zun Yi aluminium oxide.When
Time due to granularity roughening relatively serious, the particle of-30 all falls below about 0.6%.The concentration control of seminal fluid the most at that time
Making the highest, at about 170g/l, be unfavorable for that fine particle produces, the fine particle that now detects is substantial amounts of is Disodium oxalate..
The feature of Disodium oxalate. crystal is difficult to grow up exactly, and reason is that the needle-shaped crystal structure frangibility of its own, final or logical
Filtration enters in mother solution and is pulled away.When system finds there is substantial amounts of tiny (1.92) particle, and when being difficult to grow up,
May determine that and system has Disodium oxalate. separate out.Therefore, the periodicity of Disodium oxalate. separates out only product granularity cyclically-varying
A kind of attendant phenomenon, be not the essence affecting product granularity cyclic fluctuation.
Analyzed, if we can stablize the nucleus quantity in decomposing system, the periodic wave of control decomposing by above
Dynamic problem just can have been resolved.What crucial problem was intended to solve nucleus carrys out source problem, in the roasting process of aluminium hydroxide,
By producing substantial amounts of granularity dust below 20, being gathered dust by electricity and get back, composition is the mixing of aluminium oxide and aluminium hydroxide
Thing, when these dust are mixed in product, except affecting product igloss, also can affect product granularity.Many aluminium oxidies are same
Row part of gathering dust electricity carries out excessive quantifier elimination, it is believed that electricity part of gathering dust can be used as the nucleus of catabolic process completely and uses, it
Activity is the best, can work as have same and be about to after electricity dust collection powder adds in the middle of decomposing system, but occur in that unthinkable
As a result, control decomposing seriously refines.Therefore, colleague considers that electricity consumption dust collection powder adds as the crystal seed of catabolic process the most never again
Add use.According to researching and analysing of my individual, some details of catabolic process are understood by everybody to occur the reason of this phenomenon to be
It is the most careful to obtain, and the addition of part of gathering dust electricity and adding method are held incorrect caused.Addition is too much, and the electricity of interpolation gathers dust
Part is the most uneven in decomposing system, and many regions are difficult to grow up, and causes refinement, and few region activity of crystal seed is inadequate, causes big
Amount nucleus produces, and makes whole decomposing system tanglewrack, product granularity severe exacerbation.
Summary of the invention
It is an object of the invention to provide a kind of alumina product Task-size Controlling production method, in order to preferably improve use
Effect, conveniently uses as required.
To achieve these goals, technical scheme is as follows.
A kind of alumina product Task-size Controlling production method, specifically comprises the following steps that
(1) roasting electricity dust collection powder is transported to Task-size Controlling device scene by powder transporter, and roasting electricity dust collection powder passes through bucket type meter
Measuring device measures, and joins in agitator, is measured by fluid meter by sodium aluminate medium, by mixed proportion simultaneously
Require to add sodium aluminate medium；Decomposition nut liquid and seminal fluid join in final stage essence plate；
(2) it is stirred by agitator so that it is keep uniformly, makes electricity dust collection powder be activated in the process, sampling simultaneously
Product carry out grain size analysis to analysis room, provide data support for precisely adding of next step；
(3) qualified serosity note people's dashpot is stirred, then according to semen volume and the granulometric composition data of serosity of production system
And the content regulation addition of fine particle in production system；
(4) after nucleus joins in seminal fluid, due to seminal fluid action of turbulent flow in pipe so that it is mix homogeneously, make in system
Nucleus keeps uniform and stable；Filter crystal seed joins in seed mixer；Finished product removes decomposer；
(5) addition point is on final stage seminal fluid board-like outlet seminal fluid pipe；
(6) after the nucleus particle in system keeps stablizing, other control conditions in production process just can keep stable, produces
Product granularity the most just can keep stable.
In the catabolic process of alumina producing, owing to crystal seed amount is up to 800g/l, decomposing serosity is exactly " a pot of porridge ",
Under such state, the electric dust collection powder that we add is to be difficult to its mix homogeneously, next to that in whole catabolic process, although
With the presence of stirring, but in the serosity of 800g/l, current mixing speed cannot make electricity dust collection powder mix homogeneously in serosity, point
Solving the body table in groove incumbent is so " laminar flow " decomposing state, here it is current interpolation electricity gathers dust, part fails to reach our imagination
In effect place.
As seen from the above analysis, adding electric part of gathering dust not is the original sin that product granularity degenerates, but we do not have
Hold precisely to add and cause with the mistake on adding method.As long as we can hold the addition of electricity dust collection powder and effectively electricity
Dust collection powder mix homogeneously, ensures that stablizing of catabolic process product granularity.The nucleus requiring to add is controlled according to control decomposing
Amount controls to see electricity gather dust in part at 0.1--1.0%(and determines less than 20 dust Kazakhstan amounts), and it is added to the seminal fluid outlet of essence plate
In pipe, owing to being in turbulent condition in seminal fluid pipe, it is shorter, when seminal fluid arrives that electricity dust collection powder and seminal fluid can be sufficiently mixed required time
When reaching seed mixer, the electricity of interpolation part of gathering dust is sufficiently mixed with seminal fluid.Thus can effectively guarantee nucleus in decomposing system
Equalization stable, the most just can effectively control product granularity no longer generating period fluctuation.
This beneficial effect of the invention is: the inventive method is easy to use, improves alumina producing Task-size Controlling and uses
Effect, it is simple to regulation controls to use as required, and energy-conserving and environment-protective, using effect is good.
Accompanying drawing explanation
Fig. 1 is method flow schematic diagram used in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described, in order to be better understood from the present invention.
Embodiment
Alumina product Task-size Controlling production method as shown in Figure 1, specifically comprises the following steps that
(1) roasting electricity dust collection powder 3 is transported to Task-size Controlling device 8 scene by powder transporter, and roasting electricity dust collection powder 3 passes through bucket type
Quantifier measures, and joins in agitator, is measured by fluid meter by sodium aluminate medium 4 simultaneously, by mixing
Proportion requirement adds sodium aluminate medium 4；Decomposition nut liquid 1 and seminal fluid 2 join in final stage essence plate 9；
(2) it is stirred by agitator so that it is keep uniformly, makes electricity dust collection powder be activated in the process, sampling simultaneously
Product carry out grain size analysis to analysis room, provide data support for precisely adding of next step；
(3) stir qualified serosity and inject dashpot, then according to semen volume and the granulometric composition data of serosity of production system
And the content regulation addition of fine particle in production system；
(4) after nucleus joins in seminal fluid 2, due to the seminal fluid 2 action of turbulent flow in pipe so that it is mix homogeneously, make in system
Nucleus keep uniform and stable；Filter crystal seed 5 joins in seed mixer 7；Finished product removes decomposer 6；
(5) after the nucleus particle in system keeps stablizing, other control conditions in production process just can keep stable, produces
Product granularity the most just can keep stable.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (1)
1. an alumina product Task-size Controlling production method, it is characterised in that: specifically comprise the following steps that
(1) roasting electricity dust collection powder is transported to Task-size Controlling device scene by powder transporter, and roasting electricity dust collection powder passes through bucket type meter
Measuring device measures, and joins in agitator, is measured by fluid meter by sodium aluminate medium, by mixed proportion simultaneously
Require to add sodium aluminate medium；Decomposition nut liquid and seminal fluid join in final stage essence plate；
(2) it is stirred by agitator so that it is keep uniformly, makes electricity dust collection powder be activated in the process, sampling simultaneously
Product carry out grain size analysis to analysis room, provide data support for precisely adding of next step；
(3) qualified serosity note people's dashpot is stirred, then according to semen volume and the granulometric composition data of serosity of production system
And the content regulation addition of fine particle in production system；
(4) after nucleus joins in seminal fluid, due to seminal fluid action of turbulent flow in pipe so that it is mix homogeneously, make in system
Nucleus keeps uniform and stable；Filter crystal seed joins in seed mixer；Finished product removes decomposer；
(5) addition point is on final stage seminal fluid board-like outlet seminal fluid pipe；
(6) after the nucleus particle in system keeps stablizing, other control conditions in production process just can keep stable, produces
Product granularity the most just can keep stable.
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| CN201610568069.3A CN106219583A (en) | 2016-07-19 | 2016-07-19 | A kind of alumina product Task-size Controlling production method |
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| CN201610568069.3A CN106219583A (en) | 2016-07-19 | 2016-07-19 | A kind of alumina product Task-size Controlling production method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104187A (en) * | 1985-05-24 | 1987-04-29 | 利利怀特公司 | β " the preparation method of aluminum oxide |
| CN1631788A (en) * | 2004-12-28 | 2005-06-29 | 中国铝业股份有限公司 | Process for preparing spherical high purity alumina |
| CN1686807A (en) * | 2005-05-18 | 2005-10-26 | 中国铝业股份有限公司 | Method for preparing alpha-Al2O3 from dust powder collected by electricity |
-
2016
- 2016-07-19 CN CN201610568069.3A patent/CN106219583A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104187A (en) * | 1985-05-24 | 1987-04-29 | 利利怀特公司 | β " the preparation method of aluminum oxide |
| CN1631788A (en) * | 2004-12-28 | 2005-06-29 | 中国铝业股份有限公司 | Process for preparing spherical high purity alumina |
| CN1686807A (en) * | 2005-05-18 | 2005-10-26 | 中国铝业股份有限公司 | Method for preparing alpha-Al2O3 from dust powder collected by electricity |
Non-Patent Citations (2)
| Title |
|---|
| 赵继华等: ""强化过饱和铝酸钠溶液种分过程的研究进展"", 《轻金属》 * |
| 韩敏: ""氢氧化铝干燥机收尘粉料的应用研究"", 《轻金属》 * |
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Application publication date: 20161214 |
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