CN1296280C - Method for combination producing alumina and cement from chalk and flyash - Google Patents
Method for combination producing alumina and cement from chalk and flyash Download PDFInfo
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- CN1296280C CN1296280C CNB2004100909491A CN200410090949A CN1296280C CN 1296280 C CN1296280 C CN 1296280C CN B2004100909491 A CNB2004100909491 A CN B2004100909491A CN 200410090949 A CN200410090949 A CN 200410090949A CN 1296280 C CN1296280 C CN 1296280C
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- cement
- aluminum oxide
- wingdale
- flyash
- carbon
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- 238000000034 method Methods 0.000 title claims abstract description 83
- 239000004568 cement Substances 0.000 title claims abstract description 77
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000010881 fly ash Substances 0.000 title claims abstract description 38
- 238000001354 calcination Methods 0.000 claims abstract description 23
- 238000005245 sintering Methods 0.000 claims abstract description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 235000019738 Limestone Nutrition 0.000 claims abstract description 3
- 239000006028 limestone Substances 0.000 claims abstract description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 50
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 36
- 229910052799 carbon Inorganic materials 0.000 claims description 36
- 239000007788 liquid Substances 0.000 claims description 30
- 238000000227 grinding Methods 0.000 claims description 23
- 230000015556 catabolic process Effects 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 17
- 238000004131 Bayer process Methods 0.000 claims description 13
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 13
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 13
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 11
- 239000010703 silicon Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 9
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 235000011089 carbon dioxide Nutrition 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 5
- 238000006253 efflorescence Methods 0.000 claims description 5
- 206010037844 rash Diseases 0.000 claims description 5
- 210000000582 semen Anatomy 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 239000002912 waste gas Substances 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 239000003518 caustics Substances 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 claims description 2
- 229910052602 gypsum Inorganic materials 0.000 claims description 2
- 238000002386 leaching Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000001238 wet grinding Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 11
- 238000001035 drying Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010000 carbonizing Methods 0.000 abstract 2
- 239000011398 Portland cement Substances 0.000 abstract 1
- 239000012670 alkaline solution Substances 0.000 abstract 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 abstract 1
- 235000012054 meals Nutrition 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 239000000284 extract Substances 0.000 description 4
- 229910001570 bauxite Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003637 basic solution Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a joint production method for preparing alumina and cement from flyash and limestone. The traditional sintering method for producing alumina adopts a wet process by which alkaline solution is added in raw meal; the present invention adopts a novel dry-process rotary kiln to carry out calcination, and the alumina clinker is non-alkali powdered clinker; the present invention adopts a technology which combines a method for thoroughly carbonizing raw liquor alumina and a low-temperature bayer method so that sandy alumina of the first grade is obtained; with the present invention, carbon dioxide which is the tail gas generated in a cement calcining kiln is used in the working procedure of thoroughly carbonizing the raw liquor, and CO2 concentration is increased by means of the tail gas generated in the cement calcining kiln; calcium silicon slag generated in the process of extracting alumina is used for producing portland cement clinker; wastes are changed into valuables, pollution can be reduced, and energy resource can be saved.
Description
Affiliated technical field
The present invention relates to the method for a kind of combination producing aluminum oxide and cement, particularly a kind of method of utilizing flyash and Wingdale combination producing aluminum oxide and cement.
Background technology
Along with the aluminium industrial expansion, metallic aluminium and aluminum oxide have become more and more wellr sold and in short supply Industrial products in China, its throughput can not satisfy the growing needs of people far away, and unique raw material of producing aluminium and aluminum oxide at present is the aluminium vanadine, so bauxite resource is poor just day by day.Expect 2005, China's primary aluminum annual production will break through 7,000,000 tons, will leap to the first in the world, then annual 1400 ten thousand tons of aluminum oxide and 2,800 ten thousand bauxite of needing.Domestic fine bauxite is just day by day exhausted.
From the long-range strategic point of view, must be from its alumina content greater than extracting aluminum oxide 30% the high silicon aluminum-containing raw material, promptly must extract aluminum oxide kaolin, clay and the coal gangue etc. widely, particularly from the flyash of serious environment pollution, extract aluminum oxide from originating.
The present invention's general introduction
The invention provides and a kind ofly extract aluminum oxide from flyash and Wingdale, the waste residue of its generation is used to produce the method for cement.The present invention is to be that raw material is produced aluminum oxide with serious environment pollution flyash, and the waste residue of its generation is used to produce cement, and therefore, it comprises two technical process, the technical process of first alumina producing, and it two is technical process of producing cement from fag end.Wherein the technical process of alumina producing comprises raw grinding operation, alumina clinker sintering circuit, aluminum oxide stripping operation, the thick thorough carbon operation break-down of liquid, high silicon aluminium hydroxide low temperature Bayer process stripping operation again, plants operation break-down and aluminium oxide calcining process; And the technical process of producing cement comprises burden process, powder-grinding process, calcination operation and cement grinding operation.
After the stripping of described aluminum oxide stripping operation finishes, enter separation system and carry out solid-liquid separation, the thick liquid after the separation enters above-mentioned carbon operation break-down, and solid-state silico-calcium slag is gone into the cement Production Flow Chart through washing is laggard.
Flyash adds Wingdale, obtains with C by sintering
2S,, C
12A
7, CA and CF be the alkali-free grog of main raw material, these grogs are through process of cooling, it is from β-C
2S is to comparing inert γ-C
2S changes, its volumetric expansion 10%, the particle about efflorescence to 20 μ m just can leach aluminum oxide and the very low residue of alkalinity with dilute sodium carbonate solution then from above-mentioned grog voluntarily, allocate the Wingdale cement baking into these residues, thereby reach no waste material production.
Aforesaid method is with they are compared with alkali-lime sinter process processing, and the alkaline consumption of this processing method reduces greatly, and waste residue can be fully used.
In addition, raw material of the present invention is an industrial residue flyash, and the waste residue that produces in producing alumina process is used for manufacture of cement, and the carbonic acid gas in the kiln tail gas is used for carbonation decompsition process.The present invention has good environmental protection benefit, turns waste into wealth, and meets the strategy of sustainable development of country.
Description of drawings
Fig. 1 is the process flow sheet that the present invention utilizes flyash combination producing aluminum oxide and cement.
Preferential embodiment
The present invention extracts aluminum oxide from flyash and Wingdale, the waste residue of its generation is used to produce the method for cement, and therefore, it comprises two technical process, the technical process of first alumina producing, and it two is technical process of producing cement from fag end.Wherein the technical process of alumina producing comprises raw grinding operation, alumina clinker sintering circuit, aluminum oxide stripping operation, the thick thorough carbon operation break-down of liquid, high silicon aluminium hydroxide low temperature Bayer process stripping operation again, plants operation break-down and aluminium oxide calcining process; And the technical process of producing cement comprises burden process, powder-grinding process, calcination process and cement grinding operation.
Fig. 1 is the process flow sheet that the present invention utilizes flyash combination producing aluminum oxide and cement.Flyash adds Wingdale, obtains with C by sintering
2S, C
12A
7, CA and CF be the alkali-free grog of main raw material, these grogs are through process of cooling, it is from β-C
2S is to comparing inert γ-C
2S changes, its volumetric expansion 10%, particle about efflorescence to 20 μ m voluntarily, just can from above-mentioned grog, leach aluminum oxide and the very low residue of alkalinity then with dilute sodium carbonate solution, with solid-liquid separating method they are separated, separate the thick liquid in back and carry out the thorough carbon branch of thick liquid, wherein also tail waste gas in the cement burning kiln is used for the carbonic acid gas that the thorough carbon of the thick liquid of enrichment divides, thereby obtain index A/S and be about 70 high silicon aluminium hydroxide, obtain the one-level sandy alumina with high silicon aluminium hydroxide low temperature Bayer process stripping operation again; And the residue that solid-liquid separation goes out allocates Wingdale into be sintered into cement clinker in rotary kiln, thereby reaches no waste material production.
Described raw grinding operation comprises flyash and Wingdale carries out grinding according in the incoming stock mill of 30: 70 mixed.Raw material behind the grinding enter and carry out the homogenizing processing in the homogenizing storehouse, in the raw material feeding rotary kiln after homogenizing is qualified, carry out sintering for following one alumina clinker sintering circuit and prepare.Its raw material index is: A/S is 0.5-1.4, and preferable range A/S is 0.7-0.95; The raw material saturation ratio is 0.6-1.2, and raw material saturation ratio preferable range is 0.75-0.95.
Described alumina clinker sintering circuit, the raw material sintering in rotary kiln after promptly qualified.Its sintering range is 1260-1440 degree (degree centigrade, down with), and preferred sintering range is 1340 degree-1390 degree.Its grog index is: A/S is 0.65-1.1, and preferable range A/S is 0.70-0.95; The grog saturation ratio is 0.65-1.0, and grog saturation ratio preferable range is 0.75-0.95; From Pulverization ratio: sieve it by greater than 95% with the 02mm sieve; The aluminum oxide industry solubility rate is greater than 75%.
Described aluminum oxide stripping operation comprise efflorescence grog in dissolving device under the temperature of 60-80 degree, sodium carbonate solution with 30-60g/l flooded 15-50 minute, and optimum condition is that 60g/l, stripping temperature are that 70 degree, dissolution time are 30 minutes for sodium carbonate solution concentration.After stripping finishes, enter separation system and carry out solid-liquid separation, the thick liquid after the separation enters the carbon operation break-down, and solid-state silico-calcium slag is calcined through sending in the cement rotary kiln after washing.
The thorough carbon operation break-down of described thick liquid comprises that the tail gas carbon dioxide gas that will produce in the cement burning kiln is used for the thorough carbon operation break-down of thick liquid, utilizes that tail waste gas comes the enrichment carbonic acid gas in the cement burning kiln, and thick liquid divides at carbon and carries out the carbon branch in the tower group.Its carbon branch condition is: carbon branch temperature is the 50-80 degree, and preferred carbon branch temperature is the 65-75 degree.It is that caustic sodium concentration in the solution is less than 2g/l that carbon divides terminal point.After the carbon operation break-down finishes, enter separation system and carry out solid-liquid separation, solid enters the Bayer process system after washing through seed precipitation solution.And carbon mother liquid is delivered to the stripping operation and is carried out the stripping of next batch grog.
Described high silicon aluminium hydroxide low temperature Bayer process stripping operation comprises that carbon divides the high silicon aluminium hydroxide of back production to send into and carries out the Bayer process stripping in the canalization digester.Its stripping temperature range is the 110-180 degree, and preferred stripping temperature range is the 140-160 degree; Circulation alkali Na
2O
kBe 160g/l; The dissolution fluid molecular ratio is 1.35; The seminal fluid alumina concentration is 160-220g/l.
Described kind of operation break-down, promptly the seminal fluid aluminum oxide carries out kind of a branch decomposition in seed precipitation tank.
Described aluminium oxide calcining process is sent into the roasting system calcining and is produced sandy alumina after comprising that kind of the aluminium hydroxide of branch production is through washing.
The technical process of producing cement comprises burden process, powder-grinding process, calcination process and cement grinding operation again.
Described burden process and powder-grinding process comprise the silico-calcium slag that produces in the aluminum oxide process in leaching after washing with small amount of limestone according to (90-95): ratio (10-5) enters the wet grinding mill system, grinds cement slurry.
Described calcination process, promptly above-mentioned qualified cement slurry is calcined in rotary kiln.Cement slurry is sintered into cement clinker.
Described cement grinding operation comprises that cement clinker with gypsum and mixing material, enters in the cement grinding mill by a certain percentage, grinds into cement.
The invention provides a kind of method of utilizing flyash and Wingdale combination producing aluminum oxide and cement, and traditional sintering process production aluminum oxide all adopts wet production, it adds basic solution in raw material, and the present invention adopts the new dry process rotary kiln to calcine, and makes that alumina clinker is the alkali-free efflorescence grog; And the present invention adopts the thorough carbon of thick liquid oxidation aluminium to divide and low temperature Bayer process stripping process combined, thereby can access the one-level sandy alumina; The present invention is used for the thorough carbon operation break-down of thick liquid with the tail gas carbon dioxide gas that produces in the cement burning kiln, utilizes that tail waste gas comes the enrichment carbonic acid gas in the cement burning kiln; Waste silico-calcium slag with extracting alumina process is used to produce Portland clinker, both turns waste into wealth, and can reduce pollution again, again can save energy.
Claims (18)
1, a kind of method of utilizing flyash and Wingdale combination producing aluminum oxide and cement, the technical process that it comprises the technical process of alumina producing and utilizes producing cement from fag end, wherein the technical process of alumina producing comprises raw grinding operation, alumina clinker sintering circuit, aluminum oxide stripping operation, the thick thorough carbon operation break-down of liquid, high silicon aluminium hydroxide low temperature Bayer process stripping operation, kind operation break-down and the aluminium oxide calcining process of flyash and Wingdale again; After the stripping of described aluminum oxide stripping operation finishes, enter separation system and carry out solid-liquid separation, the thick liquid after the separation enters above-mentioned carbon operation break-down, and solid-state silico-calcium slag is gone into the cement Production Flow Chart through washing is laggard; And the technical process that utilizes producing cement from fag end comprises burden process, powder-grinding process, calcination process and cement grinding operation.
2, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1, it is characterized in that the thorough carbon operation break-down of described thick liquid comprises that the tail gas carbon dioxide gas that will produce in the cement calcination kiln is used for the thorough carbon operation break-down of thick liquid, utilize that tail waste gas comes the enrichment carbonic acid gas in the cement calcination kiln.
3, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, the raw grinding operation that it is characterized in that described flyash and Wingdale comprises flyash and Wingdale carries out grinding according in the incoming stock mill of 30: 70 mixed; Raw material behind the grinding enter and carry out the homogenizing processing in the homogenizing storehouse, in the raw material feeding rotary kiln after homogenizing is qualified, carry out sintering for following one alumina clinker sintering circuit and prepare; Its flyash and Wingdale raw material index are: A/S is 0.5-1.41, and the raw material saturation ratio is 0.6-1.2.
4, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 3, it is characterized in that its flyash and Wingdale raw material index are: A/S is 0.7-0.95; The raw material saturation ratio is 0.75-0.95.
5, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2 is characterized in that described alumina clinker sintering circuit, the raw material sintering in rotary kiln after promptly qualified; Its sintering range is 1260-1440 ℃, and its grog index is: A/S is 0.65-1.1, and the grog saturation ratio is 0.65-1.0, from Pulverization ratio: sieve it by greater than 95% with the 0.2mm sieve; The aluminum oxide industry solubility rate is greater than 75%.
6, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 5, the sintering range that it is characterized in that described alumina clinker sintering circuit is 1340-1390 ℃, and its grog index is: A/S is that 0.70-0.95 grog saturation ratio scope is 0.75-0.95.
7, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, it is characterized in that described aluminum oxide stripping operation comprise efflorescence grog in dissolving device under 60-80 ℃ temperature, sodium carbonate solution with 30-60g/l flooded 15-50 minute, after stripping finishes, enter separation system and carry out solid-liquid separation, thick liquid after the separation enters the carbon operation break-down, and solid-state silico-calcium slag is sent into calcination in the cement rotary kiln after washing.
8, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 7 is characterized in that the condition of described aluminum oxide stripping operation is 60g/l for sodium carbonate solution concentration, and the stripping temperature is that 70 ℃, dissolution time are 30 minutes.
9, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, it is characterized in that the thorough carbon operation break-down of described thick liquid comprises that the tail gas carbon dioxide gas that will produce in the cement calcination kiln is used for the thorough carbon operation break-down of thick liquid, utilize that tail waste gas comes the enrichment carbonic acid gas in the cement calcination kiln, thick liquid divides at carbon and carries out the carbon branch in the tower group; Its carbon branch condition is: carbon branch temperature is 50-80 ℃; It is that caustic sodium concentration in the solution is less than 2g/l that carbon divides terminal point; After the carbon operation break-down finishes, enter separation system and carry out solid-liquid separation, solid enters the Bayer process system through after the seed precipitation solution washing, and carbon mother liquid is delivered to the stripping operation and carried out the stripping of next batch grog.
10, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 9 is characterized in that above-mentioned carbon branch temperature is 65-75 ℃.
11, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 9 is characterized in that described high silicon aluminium hydroxide low temperature Bayer process stripping operation comprises that carbon divides the high silicon aluminium hydroxide of back production to send into and carries out the Bayer process stripping in the canalization digester; Its stripping temperature range is 110-180 ℃, circulation alkali Na
2O
kBe 160g/l; The dissolution fluid molecular ratio is 1.35; The seminal fluid alumina concentration is 160-220g/l.
12,, it is characterized in that described high silicon aluminium hydroxide low temperature Bayer process stripping operation comprises that carbon divides the high silicon aluminium hydroxide of back production to send into and carries out the Bayer process stripping in the canalization digester as claim 1 or the 2 or 10 described methods of utilizing flyash and Wingdale combination producing aluminum oxide and cement; Its stripping temperature range is 110-180 ℃, circulation alkali Na
2O
kBe 160g/l; The dissolution fluid molecular ratio is 1.35; The seminal fluid alumina concentration is 160-220g/l.
13, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2 is characterized in that the stripping temperature range is 140-160 ℃.
14, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2 is characterized in that described kind of operation break-down, and promptly the seminal fluid aluminum oxide carries out kind of a branch decomposition in seed precipitation tank.
15, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, after it is characterized in that described aluminium oxide calcining process comprises that kind of the aluminium hydroxide of branch production is through washing, send into the roasting system calcination and produce sandy alumina.
16, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, it is characterized in that producing the described burden process of technical process of cement and powder-grinding process comprise the silico-calcium slag that produces in the aluminum oxide process in leaching after washing with small amount of limestone according to (90-95): ratio (10-5) enters the wet grinding mill system, grinds cement slurry.
17, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, it is characterized in that producing the described calcination operation of the technical process of cement, be the cement slurry calcination in rotary kiln after qualified, the cement slurry calcination is become cement clinker.
18, the method for utilizing flyash and Wingdale combination producing aluminum oxide and cement as claimed in claim 1 or 2, the described cement grinding operation that it is characterized in that producing the technical process of cement comprises that cement clinker is with gypsum and mixing material, enter in the cement grinding mill by a certain percentage, grind into cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100909491A CN1296280C (en) | 2004-11-12 | 2004-11-12 | Method for combination producing alumina and cement from chalk and flyash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100909491A CN1296280C (en) | 2004-11-12 | 2004-11-12 | Method for combination producing alumina and cement from chalk and flyash |
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|---|---|
| CN1644506A CN1644506A (en) | 2005-07-27 |
| CN1296280C true CN1296280C (en) | 2007-01-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329301C (en) * | 2005-12-31 | 2007-08-01 | 朔州市人民政府 | Process for extracting aluminium hydroxide from flyash |
| CN100457628C (en) * | 2006-06-02 | 2009-02-04 | 李禹� | Method of extracting aluminium oxide from fly ash and simultaneously producing white carbon black |
| CN100368297C (en) * | 2006-09-13 | 2008-02-13 | 内蒙古蒙西高新技术集团有限公司 | Device for preparing aluminum oxide self-efflorescence grog by fusion method and preparation method thereof |
| CN101125656B (en) * | 2007-08-07 | 2010-06-09 | 平朔煤炭工业公司 | Method for firstly extracting silicon and secondly extracting aluminum from fly ash |
| CN100443601C (en) * | 2007-08-23 | 2008-12-17 | 内蒙古蒙西高新技术集团有限公司 | Method for producing metal gallium with coproduction of alumina |
| CN101870487B (en) * | 2009-04-23 | 2012-06-06 | 刘庆玲 | Process for producing aluminium hydroxide and cement by utilizing fly ash |
| CN101870484B (en) * | 2009-04-23 | 2012-06-06 | 刘庆玲 | Process for producing aluminium hydroxide and cement by utilizing fly ash |
| CN101928026B (en) * | 2009-06-26 | 2012-07-04 | 中国恩菲工程技术有限公司 | Sintering process for producing alumina |
| CN101811712A (en) | 2010-04-27 | 2010-08-25 | 中国神华能源股份有限公司 | Method for preparing metallurgical-grade aluminum oxide by using fluid-bed fly ash |
| EP2927199B1 (en) | 2012-11-27 | 2022-07-20 | China Energy Investment Corporation Limited | Method for preparing soda-lime-silica glass basic formula and method for extracting aluminum from fly ash for co-production of glass |
| CN103145160B (en) * | 2013-01-08 | 2015-03-18 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Method for producing alumina by using high-alumina fly ash |
| CN105540627A (en) * | 2016-01-19 | 2016-05-04 | 中国铝业股份有限公司 | Preparation method for clinker of alumina produced by sintering process |
| CN105753024A (en) * | 2016-03-16 | 2016-07-13 | 酒泉钢铁(集团)有限责任公司 | Method for extracting aluminum oxide from coal ash on basis of lime sinter process |
| CN106365187B (en) * | 2016-08-30 | 2018-10-12 | 内蒙古大唐国际再生资源开发有限公司 | A kind of sintering process produces the configuration method of raw slurry in alumina process |
| CN107986375A (en) * | 2017-12-12 | 2018-05-04 | 常州琨瑶纺织品有限公司 | A kind of preparation method of leather waste water adsorbent |
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| CN1149033A (en) * | 1995-10-24 | 1997-05-07 | 王国寰 | Treatment of flyash |
| AT407874B (en) * | 1999-09-07 | 2001-07-25 | Holderbank Financ Glarus | Production of synthetic slag used in the production of cement clinker comprises adjusting silicate limestone and/or flotation residues containing silicon dioxide and electric furnace dust to a specified slag basicity |
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