CN108190927A - The method of organic matter removal methods and production aluminium oxide - Google Patents
The method of organic matter removal methods and production aluminium oxide Download PDFInfo
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- CN108190927A CN108190927A CN201810252057.9A CN201810252057A CN108190927A CN 108190927 A CN108190927 A CN 108190927A CN 201810252057 A CN201810252057 A CN 201810252057A CN 108190927 A CN108190927 A CN 108190927A
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- causticization
- organic matter
- removal methods
- matter removal
- slag
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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 description 156
- 238000000034 method Methods 0.000 title description 51
- 239000005416 organic matter Substances 0.000 title description 40
- 238000004519 manufacturing process Methods 0.000 title description 16
- 239000002893 slag Substances 0.000 description 63
- 229910001570 bauxite Inorganic materials 0.000 description 32
- 238000005406 washing Methods 0.000 description 32
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 30
- 239000000292 calcium oxide Substances 0.000 description 30
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 30
- 239000000126 substance Substances 0.000 description 30
- 238000004090 dissolution Methods 0.000 description 29
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 28
- 238000006243 chemical reaction Methods 0.000 description 22
- 239000007788 liquid Substances 0.000 description 22
- 230000008569 process Effects 0.000 description 22
- 238000005245 sintering Methods 0.000 description 22
- 235000019738 Limestone Nutrition 0.000 description 21
- 239000006028 limestone Substances 0.000 description 21
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 20
- 239000000203 mixture Substances 0.000 description 20
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 19
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 19
- 239000012530 fluid Substances 0.000 description 19
- 239000013078 crystal Substances 0.000 description 18
- 239000006210 lotion Substances 0.000 description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 239000000920 calcium hydroxide Substances 0.000 description 15
- 235000011116 calcium hydroxide Nutrition 0.000 description 15
- 238000004380 ashing Methods 0.000 description 14
- 238000009993 causticizing Methods 0.000 description 14
- 229910000029 sodium carbonate Inorganic materials 0.000 description 14
- 239000007787 solid Substances 0.000 description 13
- 238000007667 floating Methods 0.000 description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 10
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 10
- 229910001948 sodium oxide Inorganic materials 0.000 description 10
- 239000012535 impurity Substances 0.000 description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- QXDMQSPYEZFLGF-UHFFFAOYSA-L calcium oxalate Chemical compound [Ca+2].[O-]C(=O)C([O-])=O QXDMQSPYEZFLGF-UHFFFAOYSA-L 0.000 description 8
- 239000000377 silicon dioxide Substances 0.000 description 8
- 239000008235 industrial water Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 6
- 235000011941 Tilia x europaea Nutrition 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- 239000004571 lime Substances 0.000 description 6
- 238000004064 recycling Methods 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002002 slurry Substances 0.000 description 5
- 206010043087 Tachyphylaxis Diseases 0.000 description 4
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 4
- 238000001354 calcination Methods 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 4
- 229910001388 sodium aluminate Inorganic materials 0.000 description 4
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 4
- 229940039790 sodium oxalate Drugs 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229940039748 oxalate Drugs 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 206010039509 Scab Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910001710 laterite Inorganic materials 0.000 description 1
- 239000011504 laterite Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- C01F7/06—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
-
- 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
- C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to field of aluminum oxide production, and in particular to a kind of organic matter removal methods and the method for production aluminium oxide.The present invention proposes a kind of organic matter removal methods, includes the following steps：Causticization slag containing calcium oxalate is sintered with bauxite and lime stone, causticization slag accounts for the 10 20% of the gross mass of the mix of causticization slag, bauxite and lime stone.Its causticization is at low cost, realizes that the recycling increment of causticization slag utilizes, while solve the problems, such as the anti-molten of causticization slag, and solves the security risk of causticization slag pollution environment.
Description
Technical field
The present invention relates to field of aluminum oxide production, and in particular to the side of a kind of organic matter removal methods and production aluminium oxide
Method.
Background technology
Bauxite is the primary raw material for producing aluminium oxide, and China's amount of storage is few, yield is big, and bauxite resource shortage is
Into the short slab of aluminum industry in China sustainable development.Contribute to alleviate resource supply and demand contradiction from external import bauxite, for China
The Significance of Sustainable Development of aluminum i ndustry is great.But the big feature that external bauxite is different from domestic ore deposit is in bauxite
Content of organics is generally higher, belongs to middle and high organic matter ore type.
Organic matter in bauxite can be entered in solution when high temperature dissolves out, so as to be recycled in Bayer process flow.Aluminium
Content of organics in native ore deposit is higher, and high temperature enters more in solution when dissolving out.As the organic matter in flow continues to build up,
It endangers after building up to a certain degree and gradually highlights, if red mud and the sedimentation of fine grain kind are difficult, solution foaming foam, resolution ratio declines,
Product granularity refines, and seed filter production capacity reduces, and groove tank equipment scabs serious etc..In order to eliminate the harm that organic matter is brought,
It needing specially to open up organic matter removing process, the method for organic matter removing is more, each method respectively has its pros and cons, wherein, lime
Causticizing process is easy to operate, is easy to industrialized production, but there are alumina loss rate is high, causticization is of high cost, the anti-disadvantages such as molten of causticization slag
End, in addition, not only taking up valuable rare soil containing the calcium and aluminum metal element that can be recycled, outer row's stockpiling in causticization slag
Ground resource, but also the wasting of resources and environmental pollution can be caused.Therefore, the technology of existing lime causticization removing organic matter compels to be essential
It advanced optimizes.
Invention content
The purpose of the present invention is to provide a kind of organic matter removal methods, and causticization is at low cost, realize the resource of causticization slag
Change increment to utilize, while solve the problems, such as the anti-molten of causticization slag, and solve the security risk of causticization slag pollution environment.
Another object of the present invention is to provide a kind of method for producing aluminium oxide, causticization slag is efficiently used, reduces life
The cost of aluminium oxide is produced, promotion prepares the purity of aluminium oxide.
The present invention is solved its technical problem and is realized using following technical scheme：
The present invention proposes a kind of organic matter removal methods, includes the following steps：By causticization slag and alumina containing calcium oxalate
Ore deposit and lime stone are sintered, and causticization slag accounts for the 10-20% of the gross mass of the mix of causticization slag, bauxite and lime stone.
The present invention proposes a kind of method for producing aluminium oxide, is prepared by above-mentioned organic matter removal methods.
Organic matter removal methods of the present invention and the advantageous effect of method of production aluminium oxide are：Organic matter provided by the invention
Removal methods flow is simple, and operating cost is low, and equipment investment is few, non-environmental-pollution, and gained causticization slag can visitd as raw material
Ear-sintering process inside plants recycle, the utilization rate 70~80% of calcium oxide in causticization slag, and the rate of recovery 60 of aluminium oxide~
80%, effectively reduce causticization cost.Therefore, the present invention provides new way for the recycling recycling of causticization slag, is a kind of
With the inexpensive organic matter causticization removal methods for promoting future.
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
In the description of the present invention, it should be noted that term " first ", " second " etc. are only used for distinguishing description, without
It is understood that indicate or implying relative importance.
The method of the organic matter removal methods of the embodiment of the present invention and production aluminium oxide is specifically described below.
A kind of organic matter removal methods provided in an embodiment of the present invention：
S1, the causticization slag containing calcium oxalate is prepared；
Will be enriched in organic matter aluminium hydroxide crystal seed washing lotion reacted with milk of lime after isolated causticization slag.Specifically
The aluminium hydroxide crystal seed washing lotion of organic matter and milk of lime be will be enriched in the environment of 60-75 DEG C with the tachyphylaxis 1- of 50-60rpm
2 hours, then cause the oxalate denominationby knot in the calcium ion in milk of lime and the aluminium hydroxide crystal seed washing lotion rich in organic matter
Conjunction forms calcium oxalate precipitation, while aluminium hydroxide in aluminium hydroxide crystal seed washing lotion etc. is existed in reaction solution.In the reaction
Under the conditions of, causticizing reaction can be smoothed out, and can guarantee the oxalate in the aluminium hydroxide crystal seed washing lotion rich in organic matter from
Subbase originally can be deposited completely.
Further, 10-20g containing sodium oxide molybdena in every liter of aluminium hydroxide crystal seed washing lotion rich in organic matter, sodium oxide molybdena are in
It can ensure that causticizing reaction is smoothed out in the range of being somebody's turn to do.
Further, it is 1-1.2 by the ratio between amount of substance of calcium oxide and sodium oxalate：1, the substance of calcium oxide and aluminium oxide
The ratio between amount be 3.0-3.2:1, the ratio between amount of substance of calcium oxide and sodium carbonate is 1-1.2:1 ratio addition milk of lime, is protected
Card milk of lime can fully react with the substance in the aluminium hydroxide crystal seed washing lotion rich in organic matter.
Further, aluminium hydroxide crystal seed washing lotion is detached with milk of lime causticization slurries obtained by the reaction causticization overflow and
Causticization underflow.Causticization slurries carry out sedimentation separation and obtain causticization overflow and causticization underflow, and sedimentation separation is easy to operate, will not increase
The consumption of resources of production, while additional pollutant will not be generated.Obtained causticization overflow is sent to ashing process, as ashing
The industrial water of process uses, and the requirement of the industrial water of ashing process is low, and needed for the temperature of causticization overflow and ashing process
Temperature approaches, and without additionally being heated to the industrial water of ashing process, handles causticization overflow using the above method, not only prevents
Only pollution caused by causticization overflow discharge, while causticization overflow is recycled, ashing process industrial water is reduced, into one
Step economizes on resources.
Further, containing floating solid 0.5-1g in every liter of causticization overflow, the floating material contained in causticization overflow can
To be settled in follow-up ashing process, floating material is then avoided to pollute environment, meanwhile, the floating solid containing aforementioned proportion
Causticization overflow can be directly used for ashing process, without carrying out pre-treatment, further economize on resources.
Further, 200-400g containing solid in every liter of causticization underflow ensures follow-up point in causticization underflow containing above-mentioned solid
During from solid, above-mentioned solid can be detached quickly with the liquid in causticization underflow, meanwhile, above-mentioned solids ratios ensure aluminium hydroxide
Crystal seed washing lotion oxalate, aluminium oxide are adequately settled, and promote the effect of causticizing reaction.
And then causticization slag and causticization wash heat liquid is obtained by filtration by the washing of plate and frame filter again in causticization underflow, causticization slag is used
Aluminium oxide is recycled in subsequent calcination, and causticization wash heat liquid is then passed into causticizing reaction and is used as the dilution of causticizing reaction again
Water, can be further reduced the waste of resource, while reduce the discharge of pollutant, and it is organic that greenization removing is furthermore achieved
Object.
Further, during washing, the temperature of washings is 60-75 DEG C, temperature of washing water and causticization underflow after causticizing reaction
Temperature approach, prevent the ingredient of causticization slag caused by the change of temperature from changing, ensure to use up during the sintering of follow-up causticization slag
Impurity may be generated less, ensure the purity of aluminium oxide subsequently prepared.
Further, ensure that causticization wash heat liquid can be used for causticization containing floating material 0.5-1g in every liter of causticization wash heat liquid
The thinned water of reaction ensures that floating material does not interfere with the process of causticizing reaction.
Further, the moisture content of causticization slag is 20-30%, and the moisture content of control causticization slag prevents the slag waste of sintering causticization
The energy promotes causticization slag sintering and prepares the yield of aluminium oxide, while prevent causticization slag anti-molten.
S2, sintering；
Causticization slag containing calcium oxalate is sintered with bauxite and lime, specifically, by causticization slag and bauxite, stone
Lime stone is mixed to get mix, and then mix is at 1300-1500 DEG C, and sintering time is 1-2 hours, in the temperature strip
The ingredient of calcic chemically reacts under part, obtains being not easy the calcic object phase dissolved out, and phase transition occurs for the ingredient containing aluminium, obtains
It is easy to the phase of object containing aluminium of dissolution.And dispensing is sintered together for causticization slag and lime, bauxite etc., avoids the anti-molten of causticization slag.Together
When, causticization slag is not being stored up, but is used as sintering process dispensing, can effectively solve the security risk of pollution environment.
Further, causticization slag accounts for the 10-20% of the gross mass of the mix of causticization slag, bauxite and lime stone.It adopts
By the use of aforementioned proportion as the additive amount of causticization slag, ensure that calcium oxalate, calcium carbonate in causticization slag etc. can be by sufficient heating point
Solution then obtains carbon monoxide, carbon dioxide gas discharge, then obtains calcium oxide.
Further, the ratio between amount of substance of calcium oxide and silica is 2-2.5 in mix:1, in mix
The ratio between amount of substance of calcium oxide and aluminium oxide is 2-2.5:1.Each object can be ensured using above-mentioned material ratio in sintering process
Matter is fully reacted, and ensures the purity and yield of the aluminium oxide being prepared.
Further, aluminium oxide accounts for the 30-50% of bauxite quality in the bauxite used, and silica accounts for alumina mineral
The 10-20% of amount, remaining is impurity, and calcium oxide accounts for the 40-60% of lime stone quality in the lime stone used, remaining is impurity.
It can ensure that substance can smoothly be decomposed in causticization slag using the bauxite and lime stone of mentioned component content, then cause
Bauxite, lime stone and causticization slag decomposition product can smoothly react.
S3, dissolution；
The clinker obtained after sintering is reacted with the dissolution fluid containing carbonate, it is preferable that the dissolution containing carbonate
The ratio between amount of substance of aluminium oxide is 2-3 in sodium carbonate and clinker in liquid：1.
Calcium oxide, the aluminium oxide that dissolution fluid can be dissolved in clinker then obtain sodium aluminate and calcium carbonate, then can be real
The separation of existing calcium and aluminium, then can prepare aluminium oxide using sodium aluminate.Can guarantee using aforementioned proportion calcium oxide in clinker,
Aluminium oxide can be reacted with dissolution fluid as much as possible, then ensure the purity and yield of the aluminium oxide prepared.
Further, the temperature that clinker is reacted with the dissolution fluid containing carbonate is 60-90 DEG C, and the reaction time is small for 1-2
When.Using above-mentioned reaction condition so that dissolution fluid can smoothly be reacted with calcium oxide and aluminium oxide, ensure result of extraction, thoroughly
Realize the separation of calcium and aluminium.
Further, containing sodium carbonate 130-150g in every liter of dissolution fluid containing carbonate, the dissolution fluid containing carbonate
The ratio between amount of substance of middle sodium oxide molybdena and aluminium oxide is 1.5-2:1.Remnants of the dissolution fluid for the dissolution fluid of last time, control dissolution
The content of sodium oxide molybdena and aluminium oxide in liquid can ensure that sodium carbonate and product containing aluminum sinter smoothly react.Sodium carbonate and contain
Precipitation of calcium carbonate and sodium aluminate is obtained by the reaction in aluminum sinter product, and calcium carbonate can be used for the preparation of cement, and sodium aluminate is then present in molten
Go out in liquid, convenient for subsequently preparing aluminium oxide.
The present invention also provides a kind of method for producing aluminium oxide, including above-mentioned organic matter removal methods.
The organic matter removal methods flow is simple, and operating cost is low, and equipment investment is few, non-environmental-pollution, gained causticization slag
It can recycle, the utilization rate 70~80% of calcium oxide in causticization slag, aoxidize in Bayer-sintering process inside plants as raw material
The rate of recovery 60~80% of aluminium, effectively reduces causticization cost.Therefore, the present invention is provided for the recycling recycling of causticization slag
New way is a kind of inexpensive organic matter causticization removal methods for having and promoting future.
Embodiment 1
The present embodiment provides a kind of organic matter removal methods：
S1, the causticization slag containing calcium oxalate is prepared；
The aluminium hydroxide crystal seed washing lotion of organic matter and milk of lime be will be enriched in the environment of 60 DEG C with the tachyphylaxis of 50rpm
1 hour.Wherein, 10g containing sodium oxide molybdena in every liter of aluminium hydroxide crystal seed washing lotion rich in organic matter, and press calcium oxide and sodium oxalate
The ratio between amount of substance is 1：1, the ratio between amount of substance of calcium oxide and aluminium oxide is 3.0:1, the substance of calcium oxide and sodium carbonate
The ratio between amount is 1:1 ratio addition milk of lime.
By aluminium hydroxide crystal seed washing lotion and milk of lime causticization slurries obtained by the reaction carry out sedimentation separation obtain causticization overflow and
Causticization underflow.Obtained causticization overflow is sent to ashing process, and the industrial water as ashing process uses.Wherein, every liter of causticization
Contain floating solid 0.5g, 200g containing solid in every liter of causticization underflow in overflow.
And then causticization slag and causticization wash heat liquid is obtained by filtration by the washing of plate and frame filter again in causticization underflow, causticization slag is used
Aluminium oxide is recycled in subsequent calcination, and causticization wash heat liquid is then passed into causticizing reaction and is used as the dilution of causticizing reaction again
Water.During washing, the temperature of washings is 60 DEG C, wherein, containing floating material 0.5g in every liter of causticization wash heat liquid, causticization slag it is aqueous
Rate is 20%.
S2, sintering；
Causticization slag and bauxite, lime stone are mixed to get mix, then mix is at 1300 DEG C, during sintering
Between be 2 hours.Wherein, causticization slag accounts for the 10% of the gross mass of the mix of causticization slag, bauxite and lime stone.Mix
The ratio between amount of substance of middle calcium oxide and silica is 2:1, the ratio between amount of substance of calcium oxide and aluminium oxide in mix
It is 2:1.Aluminium oxide accounts for the 30% of bauxite quality in the bauxite used, and silica accounts for the 10% of bauxite quality, remaining
For impurity, calcium oxide accounts for the 40% of lime stone quality in the lime stone used, remaining is impurity.
S3, dissolution；
The clinker obtained after sintering is reacted with the dissolution fluid containing carbonate, it is preferable that the dissolution containing carbonate
The ratio between amount of substance of aluminium oxide is 2 in sodium carbonate and clinker in liquid：1.The temperature that clinker is reacted with the dissolution fluid containing carbonate
It is 60 DEG C to spend, and the reaction time is 2 hours.Containing sodium carbonate 130g, contains the molten of carbonate in every liter of dissolution fluid containing carbonate
It is 1.5 to go out the ratio between amount of substance of sodium oxide molybdena and aluminium oxide in liquid:1.
The present embodiment also provides a kind of method for producing aluminium oxide, including above-mentioned organic matter removal methods.
Embodiment 2
The present embodiment provides a kind of organic matter removal methods：
S1, the causticization slag containing calcium oxalate is prepared；
The aluminium hydroxide crystal seed washing lotion of organic matter and milk of lime be will be enriched in the environment of 75 DEG C with the tachyphylaxis of 60rpm
2 hours.Wherein, 20g containing sodium oxide molybdena in every liter of aluminium hydroxide crystal seed washing lotion rich in organic matter, and press calcium oxide and sodium oxalate
The ratio between amount of substance is 1.2：1, the ratio between amount of substance of calcium oxide and aluminium oxide is 3.2:1, the substance of calcium oxide and sodium carbonate
The ratio between amount be 1.2:1 ratio addition milk of lime.
By aluminium hydroxide crystal seed washing lotion and milk of lime causticization slurries obtained by the reaction carry out sedimentation separation obtain causticization overflow and
Causticization underflow.Obtained causticization overflow is sent to ashing process, and the industrial water as ashing process uses.Wherein, every liter of causticization
Contain floating solid 1g, 400g containing solid in every liter of causticization underflow in overflow.
And then causticization slag and causticization wash heat liquid is obtained by filtration by the washing of plate and frame filter again in causticization underflow, causticization slag is used
Aluminium oxide is recycled in subsequent calcination, and causticization wash heat liquid is then passed into causticizing reaction and is used as the dilution of causticizing reaction again
Water.During washing, the temperature of washings is 75 DEG C, wherein, floating material 1g, the moisture content of causticization slag are contained in every liter of causticization wash heat liquid
It is 30%.
S2, sintering；
Causticization slag and bauxite, lime stone are mixed to get mix, then mix is at 1500 DEG C, during sintering
Between be 1 hour.Wherein, causticization slag accounts for the 20% of the gross mass of the mix of causticization slag, bauxite and lime stone.Mix
The ratio between amount of substance of middle calcium oxide and silica is 2.5:1, in mix the amount of the substance of calcium oxide and aluminium oxide it
Than being 2.5:1.Aluminium oxide accounts for the 50% of bauxite quality in the bauxite used, and silica accounts for the 20% of bauxite quality,
Remaining is impurity, and calcium oxide accounts for the 60% of lime stone quality in the lime stone used, remaining is impurity.
S3, dissolution；
The clinker obtained after sintering is reacted with the dissolution fluid containing carbonate, it is preferable that the dissolution containing carbonate
The ratio between amount of substance of aluminium oxide is 3 in sodium carbonate and clinker in liquid：1.The temperature that clinker is reacted with the dissolution fluid containing carbonate
It is 90 DEG C to spend, and the reaction time is 2 hours.Containing sodium carbonate 150g, contains the molten of carbonate in every liter of dissolution fluid containing carbonate
It is 2 to go out the ratio between amount of substance of sodium oxide molybdena and aluminium oxide in liquid:1.
The present embodiment also provides a kind of method for producing aluminium oxide, including above-mentioned organic matter removal methods.
Embodiment 3
The present embodiment provides a kind of organic matter removal methods：
S1, the causticization slag containing calcium oxalate is prepared；
The aluminium hydroxide crystal seed washing lotion of organic matter and milk of lime be will be enriched in the environment of 75 DEG C with the tachyphylaxis of 55rpm
1.5 hour.Wherein, 15g containing sodium oxide molybdena in every liter of aluminium hydroxide crystal seed washing lotion rich in organic matter, and by calcium oxide and sodium oxalate
The ratio between the amount of substance be 1.1：1, the ratio between amount of substance of calcium oxide and aluminium oxide is 3:1, the substance of calcium oxide and sodium carbonate
The ratio between amount be 1.1:1 ratio addition milk of lime.
By aluminium hydroxide crystal seed washing lotion and milk of lime causticization slurries obtained by the reaction carry out sedimentation separation obtain causticization overflow and
Causticization underflow.Obtained causticization overflow is sent to ashing process, and the industrial water as ashing process uses.Wherein, every liter of causticization
Contain floating solid 0.8g, 300g containing solid in every liter of causticization underflow in overflow.
And then causticization slag and causticization wash heat liquid is obtained by filtration by the washing of plate and frame filter again in causticization underflow, causticization slag is used
Aluminium oxide is recycled in subsequent calcination, and causticization wash heat liquid is then passed into causticizing reaction and is used as the dilution of causticizing reaction again
Water.During washing, the temperature of washings is 65 DEG C, wherein, containing floating material 0.7g in every liter of causticization wash heat liquid, causticization slag it is aqueous
Rate is 25%.
S2, sintering；
Causticization slag and bauxite, lime stone are mixed to get mix, then mix is at 1400 DEG C, during sintering
Between be 1.5 hours.Wherein, causticization slag accounts for the 15% of the gross mass of the mix of causticization slag, bauxite and lime stone.Mixing is matched
The ratio between amount of substance of calcium oxide and silica is 2.2 in material:1, the amount of the substance of calcium oxide and aluminium oxide in mix
The ratio between be 2.2:1.Aluminium oxide accounts for the 40% of bauxite quality in the bauxite used, and silica accounts for bauxite quality
15%, remaining is impurity, and calcium oxide accounts for the 50% of lime stone quality in the lime stone used, remaining is impurity.
S3, dissolution；
The clinker obtained after sintering is reacted with the dissolution fluid containing carbonate, it is preferable that the dissolution containing carbonate
The ratio between amount of substance of aluminium oxide is 2.5 in sodium carbonate and clinker in liquid：1.Clinker is reacted with the dissolution fluid containing carbonate
Temperature is 80 DEG C, and the reaction time is 1.5 hours.Containing sodium carbonate 140g, contains carbonate in every liter of dissolution fluid containing carbonate
Dissolution fluid in the ratio between the amount of substance of sodium oxide molybdena and aluminium oxide be 1.8:1.
The present embodiment also provides a kind of method for producing aluminium oxide, including above-mentioned organic matter removal methods.
In conclusion the organic matter removal methods that 1-3 of the embodiment of the present invention is provided are by causticization slag and bauxite and lime stone
Sintering can be played the role of reducing the outer recycling increment utilization matched lime adding amount and recycling aluminium oxide, realize causticization slag,
So as to which causticization cost be greatly reduced.Meanwhile causticization slag is not intended for laterite washing slot, but match together with lime, bauxite etc.
Material sintering, avoids the anti-molten of causticization slag.Causticization slag is not being stored up, but is used as sintering process dispensing, can effectively solve dirt
Contaminate the security risk of environment.
Embodiments described above is part of the embodiment of the present invention, instead of all the embodiments.The reality of the present invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of the selected implementation of the present invention
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of organic matter removal methods, which is characterized in that include the following steps：
Causticization slag containing calcium oxalate is sintered with bauxite and lime stone, the causticization slag accounts for the causticization slag, described
The 10-20% of the gross mass of the mix of bauxite and the lime stone.
2. organic matter removal methods according to claim 1, which is characterized in that calcium oxide and dioxy in the mix
The ratio between amount of substance of SiClx is 2-2.5:1, the ratio between amount of substance of calcium oxide and aluminium oxide is 2- in the mix
2.5:1。
3. organic matter removal methods according to claim 1, which is characterized in that the temperature of sintering is 1300-1500 DEG C, is burnt
It is 1-2 hours to tie the time.
4. organic matter removal methods according to claim 1, which is characterized in that the clinker obtained after sintering is with containing carbonic acid
The dissolution fluid of root is reacted, it is preferable that in the dissolution fluid containing carbonate in sodium carbonate and clinker aluminium oxide substance
The ratio between amount be 2-3：1.
5. organic matter removal methods according to claim 4, which is characterized in that the dissolution fluid containing carbonate described in every liter
Middle containing sodium carbonate 130-150g, the ratio between amount of substance of sodium oxide molybdena and aluminium oxide is 1.5- in the dissolution fluid containing carbonate
2:1。
6. organic matter removal methods according to claim 4, which is characterized in that the clinker is with described containing carbonate
The temperature of dissolution fluid reaction is 60-90 DEG C, and the reaction time is 1-2 hours.
7. organic matter removal methods according to claim 1, which is characterized in that the causticization slag containing calcium oxalate be by
Aluminium hydroxide crystal seed washing lotion rich in organic matter causticization slag isolated after being reacted with milk of lime.
8. organic matter removal methods according to claim 7, which is characterized in that by the aluminium hydroxide crystal seed washing lotion and institute
It states milk of lime causticization slurries obtained by the reaction and detaches to obtain causticization overflow and causticization underflow.
9. organic matter removal methods according to claim 7, which is characterized in that the hydroxide of organic matter is rich in described in every liter
Aluminium crystal seed washing lotion 10-20g containing sodium oxide molybdena.
A kind of 10. method for producing aluminium oxide, which is characterized in that it includes claim 1-9 any one of them organic matters and takes off
Except method.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052441A (en) * | 2018-08-31 | 2018-12-21 | 广西田东锦鑫化工有限公司 | The method for removing and system of organic matter in a kind of aluminum oxide production process |
| CN111807394A (en) * | 2020-07-24 | 2020-10-23 | 沈阳工业大学 | A kind of method for removing organic matter from mother liquor of Bayer process |
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| CN101734697A (en) * | 2009-12-14 | 2010-06-16 | 中铝国际技术发展有限公司 | Method for causticizing and eliminating organics by adding lime milk in aluminum hydroxide wash liquor |
| CN105540628A (en) * | 2016-01-29 | 2016-05-04 | 河北科技大学 | Method for producing aluminum oxide through sintering sulfur-containing monohydrallite and lime |
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- 2018-03-26 CN CN201810252057.9A patent/CN108190927A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101734697A (en) * | 2009-12-14 | 2010-06-16 | 中铝国际技术发展有限公司 | Method for causticizing and eliminating organics by adding lime milk in aluminum hydroxide wash liquor |
| CN105540628A (en) * | 2016-01-29 | 2016-05-04 | 河北科技大学 | Method for producing aluminum oxide through sintering sulfur-containing monohydrallite and lime |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109052441A (en) * | 2018-08-31 | 2018-12-21 | 广西田东锦鑫化工有限公司 | The method for removing and system of organic matter in a kind of aluminum oxide production process |
| CN111807394A (en) * | 2020-07-24 | 2020-10-23 | 沈阳工业大学 | A kind of method for removing organic matter from mother liquor of Bayer process |
| CN111807394B (en) * | 2020-07-24 | 2022-10-28 | 沈阳工业大学 | A kind of method for removing organic matter from mother liquor of Bayer process |
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