CN108863113A - A method of improving lime milk concentration and quality - Google Patents
A method of improving lime milk concentration and quality Download PDFInfo
- Publication number
- CN108863113A CN108863113A CN201710338403.0A CN201710338403A CN108863113A CN 108863113 A CN108863113 A CN 108863113A CN 201710338403 A CN201710338403 A CN 201710338403A CN 108863113 A CN108863113 A CN 108863113A
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- CN
- China
- Prior art keywords
- lime
- milk
- ashing
- concentration
- melting machine
- 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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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/08—Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
A kind of public method for improving lime milk concentration and quality of the present invention carries out ashing using hot water using horizontal ashing melting machine, and the ratio of hot water, lime is controlled using the method for detection lime newborn density；Lime and hot water react in ashing melting machine generates milk of lime, and milk of lime comes out from the mouth with filter screen, and mouth of the ashing slag from rear portion without filter screen comes out；The milk of lime come out from horizontal ashing melting machine enters spiral slag extracting machine, and ashing slag comes out from top, and milk of lime enters sedimentation basin after coming out from lower part；Enter milk of lime storage tank by the milk of lime that sedimentation tank filter net comes out, then again with the past place needed of pumping；When ashing initial stage or lime newborn density are unsatisfactory for requiring, milk of lime is back to ashing melting machine, carries out circulation ashing to improve the concentration of milk of lime.Advantages of the present invention：It solves the problems such as lime milk concentration is low, of poor quality in current alumina producer, how to improve the concentration of milk of lime for alumina producer and quality provides technical support.
Description
Technical field
The present invention relates to improve in the method more particularly to a kind of alumina producing of a kind of raising lime milk concentration and quality
The method of lime milk concentration and quality.
Background technique
Sodium aluminate solution purification, crystalline alkali causticization, steam power plant's flue gas desulfurization or oxalic acid in existing alumina producing system
Salt causticization etc. requires addition milk of lime.For certain factories using gibbsite or concentrate selection production aluminium oxide, in alumina
Addition milk of lime is also required to before or after mine dissolution, milk of lime is essential raw material in alumina producing.Milk of lime system
Standby (also referred to as ashing, below referred to as ashing) is that essential process, lime milk concentration generally exist in alumina producing
Between 100-200g/l, the concentration of milk of lime not only with lime quality, lime granularity, the temperature of solution and ashing SOLUTION PROPERTIES
Etc. there are much relations, while also being influenced by ashing process.Ashing is that solution and lime are entered to ashing melting machine together to carry out chemistry
Reaction, whole process typically just control the ratio of solution and lime, and process flow is very simple, control is rough.Due to ashing
Be not technique production main flow, be not taken seriously always, lead to the concentration of milk of lime in actual production it is difficult to ensure that, especially work as stone
When ash is second-rate, the lime milk concentration not only prepared is low, but also the inside is mingled with the impurity such as handstone, branch.Lime milk concentration
It is low, it will lead to the water increase into system, be unfavorable for producing.The impurity being mingled with inside milk of lime will affect the use longevity of delivery pump
Life and blocking pipeline.Therefore, how lime milk concentration and quality are improved, is the technical problem for perplexing each alumina producer always.
Summary of the invention
In order to solve above-mentioned technical problem, the concentration and quality of milk of lime are improved, alumina producer is helped to enhance the competitiveness, originally
Invention provides a kind of method for improving lime milk concentration and quality.Using this method, the concentration of milk of lime not only can be improved, but also
The quality of milk of lime can be improved, it is ensured that alumina producing will not be influenced because of the concentration and quality of milk of lime.
In order to achieve the above object, the invention is realized in this way：
A method of lime milk concentration and quality are improved, using horizontal ashing melting machine, ashing is carried out using hot water, using inspection
The method of lime newborn density is surveyed to control the ratio of hot water, lime；Lime and hot water react in ashing melting machine generates milk of lime, stone
Grey cream comes out from the mouth with filter screen, and mouth of the ashing slag from rear portion without filter screen comes out；The lime come out from horizontal ashing melting machine
Cream enters spiral slag extracting machine, and ashing slag comes out from top, and milk of lime enters sedimentation basin after coming out from lower part；By sedimentation tank filter
The milk of lime that net comes out enters milk of lime storage tank, then again with the past place needed of pumping；When ashing initial stage or lime newborn density
When being unsatisfactory for requiring, milk of lime is back to ashing melting machine, carries out circulation ashing to improve the concentration of milk of lime.
Hot water used in ashing, temperature control at 65-95 DEG C, in this way will not because water temperature is low and ashing is incomplete, also not
It can cause to generate a large amount of steam when ashing because water temperature is high.
The hot water is alumina producer using the secondary vapour condensed water of evaporation or the secondary vapour condensed water of dissolution, no longer needs to use
Steam heating.
Filter screen is arranged in the horizontal ashing melting machine, previous outlet, exports as milk of lime, and the latter exports conductization
Lime-ash outlet.
The horizontal ashing melting machine center of the water inlet face of hot water, it is ensured that lime and water smooth can enter horizontal ashing melting machine.
Milk of lime outlet section is equipped with density tester.
Milk of lime passes through multistage filtering and precipitating.
The residues such as handstone are carried out separation removal, improve lime by the milk of lime come out from ashing melting machine by slag removal equipment
The quality of cream.
The milk of lime come out from slag removal equipment is entered back into sedimentation basin, enters milk of lime storage by the filter screen of sedimentation basin
Slot；Sedimentation basin periodic cleaning, to ensure the quality of milk of lime.
Advantages of the present invention and effect are as follows：
The present invention solves the problems such as lime milk concentration is low, of poor quality in current alumina producer, how to mention for alumina producer
The concentration and quality of high milk of lime provide technical support.This leads to steam consumption for evaporation liter since the concentration of milk of lime is low to reduction
Height, of poor quality that pump and pipe wear or blocking is led to problems such as to provide help, general milk of lime preparation at present relatively uses
The milk of lime that this method is prepared has many advantages, such as that concentration is high, high-quality, it is ensured that will not lead to full factory because of the problem of milk of lime
Running rate is raised and lowered in the steam consumption.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram for the method implementing procedure for improving lime milk concentration and quality of the present invention.
In figure, 1 is lime bin, and 2 be belt conveyor, and 3 be horizontal ashing melting machine, and 4 be filter screen, and 5 be filtering settling pond,
6 be sedimentation basin, and 7 be transmission pump.
Specific embodiment
Illustrate the present invention with reference to the accompanying drawing, as shown in Figure 1, the present invention use horizontal ashing melting machine, using hot water into
Row ashing controls the ratio of hot water, lime using the method for detection lime newborn density；Lime and hot water react in ashing melting machine
Milk of lime is generated, milk of lime comes out from the mouth with filter screen, and mouth of the ashing slag from rear portion without filter screen comes out；From horizontal ashing
The milk of lime that machine comes out enters spiral slag extracting machine, and ashing slag comes out from top, and milk of lime enters sedimentation basin after coming out from lower part；Through
It crosses the milk of lime that sedimentation tank filter net comes out and enters milk of lime storage tank, then again with the past place needed of pumping；When ashing initial stage
Or milk of lime is back to ashing melting machine when being unsatisfactory for requiring by lime newborn density, carries out circulation ashing to improve the concentration of milk of lime.
Hot water used in ashing, temperature control at 65-95 DEG C, in this way will not because water temperature is low and ashing is incomplete, also not
It can cause to generate a large amount of steam when ashing because water temperature is high.
The hot water is alumina producer using the secondary vapour condensed water of evaporation or the secondary vapour condensed water of dissolution, no longer needs to use
Steam heating.
Filter screen is arranged in the horizontal ashing melting machine, previous outlet, exports as milk of lime, and the latter exports conductization
Lime-ash outlet.
The horizontal ashing melting machine center of the water inlet face of hot water, it is ensured that lime and water smooth can enter horizontal ashing melting machine.
Milk of lime outlet section is equipped with density tester.
Milk of lime passes through multistage filtering and precipitating.
The residues such as handstone are carried out separation removal, improve lime by the milk of lime come out from ashing melting machine by slag removal equipment
The quality of cream.
The milk of lime come out from slag removal equipment is entered back into sedimentation basin, enters milk of lime storage by the filter screen of sedimentation basin
Slot；Sedimentation basin periodic cleaning, to ensure the quality of milk of lime.
Claims (9)
1. a kind of method for improving lime milk concentration and quality, it is characterised in that：Using horizontal ashing melting machine, hot water is utilized
Ash controls the ratio of hot water, lime using the method for detection lime newborn density；Lime and hot water react generation in ashing melting machine
Milk of lime, milk of lime come out from the mouth with filter screen, and mouth of the ashing slag from rear portion without filter screen comes out；Go out from horizontal ashing melting machine
The milk of lime come enters spiral slag extracting machine, and ashing slag comes out from top, and milk of lime enters sedimentation basin after coming out from lower part；By heavy
The milk of lime that shallow lake pond filter screen comes out enters milk of lime storage tank, then again with the past place needed of pumping；When ashing initial stage or stone
When grey newborn density is unsatisfactory for requiring, milk of lime is back to ashing melting machine, carries out circulation ashing to improve the concentration of milk of lime.
2. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：Hot water used in ashing, temperature
Degree control at 65-95 DEG C, in this way will not because water temperature is low and ashing is incomplete, will not be high because of water temperature and production when leading to ashing
Raw a large amount of steam.
3. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：The hot water is alumina producer
Using the secondary vapour condensed water of evaporation or the secondary vapour condensed water of dissolution, no longer need to be heated with steam.
4. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：The horizontal ashing melting machine,
Filter screen is arranged in previous outlet, exports as milk of lime, and the latter outlet is exported as ashing slag.
5. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：The water inlet face of hot water is sleeping
Formula ashing melting machine center, it is ensured that lime and water smooth can enter horizontal ashing melting machine.
6. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：Milk of lime outlet section is equipped with close
Spend detector.
7. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：Milk of lime passes through multistage filtering
And precipitating.
8. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：The lime come out from ashing melting machine
The residues such as handstone are carried out separation removal, improve the quality of milk of lime by cream by slag removal equipment.
9. improving the method for lime milk concentration and quality according to right 1, it is characterised in that：The stone come out from slag removal equipment
Grey cream enters back into sedimentation basin, enters milk of lime storage tank by the filter screen of sedimentation basin；Sedimentation basin periodic cleaning, to ensure lime
The quality of cream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338403.0A CN108863113A (en) | 2017-05-15 | 2017-05-15 | A method of improving lime milk concentration and quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338403.0A CN108863113A (en) | 2017-05-15 | 2017-05-15 | A method of improving lime milk concentration and quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108863113A true CN108863113A (en) | 2018-11-23 |
Family
ID=64320416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710338403.0A Pending CN108863113A (en) | 2017-05-15 | 2017-05-15 | A method of improving lime milk concentration and quality |
Country Status (1)
| Country | Link |
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| CN (1) | CN108863113A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5039344A (en) * | 1988-11-03 | 1991-08-13 | Sam Mozes | Additive to improve the properties of building materials |
| JPH0649574B2 (en) * | 1988-07-19 | 1994-06-29 | 三菱マテリアル株式会社 | Method for producing fine cubic calcium carbonate |
| CN202543072U (en) * | 2012-03-19 | 2012-11-21 | 山东海天生物化工有限公司 | Equipment for treating lime waste sand by secondary waste fresh water |
| CN202576132U (en) * | 2012-05-18 | 2012-12-05 | 襄阳泽东化工有限公司 | System for closed cyclic utilization of cinder flushing water in sulfuric acid preparation |
| CN202881106U (en) * | 2012-09-29 | 2013-04-17 | 山东金岭化工股份有限公司 | Deslagging device for lime milk |
| WO2015135954A1 (en) * | 2014-03-11 | 2015-09-17 | Lhoist Recherche Et Developpement Sa | Lime water composition |
| CN206751663U (en) * | 2017-05-24 | 2017-12-15 | 福建鸿丰纳米科技有限公司 | Lime slaking prepares the residual heat using device of calcium hydroxide refining |
-
2017
- 2017-05-15 CN CN201710338403.0A patent/CN108863113A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649574B2 (en) * | 1988-07-19 | 1994-06-29 | 三菱マテリアル株式会社 | Method for producing fine cubic calcium carbonate |
| US5039344A (en) * | 1988-11-03 | 1991-08-13 | Sam Mozes | Additive to improve the properties of building materials |
| CN202543072U (en) * | 2012-03-19 | 2012-11-21 | 山东海天生物化工有限公司 | Equipment for treating lime waste sand by secondary waste fresh water |
| CN202576132U (en) * | 2012-05-18 | 2012-12-05 | 襄阳泽东化工有限公司 | System for closed cyclic utilization of cinder flushing water in sulfuric acid preparation |
| CN202881106U (en) * | 2012-09-29 | 2013-04-17 | 山东金岭化工股份有限公司 | Deslagging device for lime milk |
| WO2015135954A1 (en) * | 2014-03-11 | 2015-09-17 | Lhoist Recherche Et Developpement Sa | Lime water composition |
| CN206751663U (en) * | 2017-05-24 | 2017-12-15 | 福建鸿丰纳米科技有限公司 | Lime slaking prepares the residual heat using device of calcium hydroxide refining |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20181123 |