CN1149033A - Treatment of flyash - Google Patents
Treatment of flyash Download PDFInfo
- Publication number
- CN1149033A CN1149033A CN95115678A CN95115678A CN1149033A CN 1149033 A CN1149033 A CN 1149033A CN 95115678 A CN95115678 A CN 95115678A CN 95115678 A CN95115678 A CN 95115678A CN 1149033 A CN1149033 A CN 1149033A
- Authority
- CN
- China
- Prior art keywords
- flyash
- sulfuric acid
- solution
- slag
- residue
- 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.)
- Granted
Links
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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
Abstract
A method for treating powdered coal ash includes the reaction of powdered coal ash on sulfuric acid to prepare aluminium sulfate, the reaction of dregs with ammonium hydroxide to extract V2O5, and mixing residual with lime stone and mineral slags to calcine cement.
Description
The present invention relates to flyash, particularly the comprehensive utilization of flyash.
Pile up like a mountain for the flyash of each high-power station of China and coal drystone at present, not only pollute to environment, and a large amount of land occupation.Have the minority area to utilize them to make gas enclosure concrete bulk as material of construction, but can't compete with other material of construction on price because of cost is too high, annual necessary financial aid could be gone down in inadequate production.Want all to utilize in enormous quantities these materials, at first need the high problem of workout cost.
The treatment process that the purpose of this invention is to provide a kind of flyash, this method utilize flyash to produce useful products, and good economic feasibility is arranged.
Method of the present invention makes wherein aluminium sesquioxide and minium and sulfuric acid reaction generation Tai-Ace S 150 for to add aqueous sulfuric acid in flyash, and solution is separated with surplus slag, makes solution crystallization obtain Tai-Ace S 150 then; Add ammonium hydroxide in the surplus slag and Vanadium Pentoxide in FLAKES reaction wherein, generate ammonium vanadate, solution is separated with residue, make solution precipitation go out Vanadium Pentoxide in FLAKES, residue can be used for making cement.
Can make very Tai-Ace S 150, the Vanadium Pentoxide in FLAKES of high value by flyash with the inventive method, remaining residue major part is made of silicon-dioxide, can be used as the raw material of 425# cement.
As seen method of the present invention has good economic feasibility and economic benefit, can turn waste into wealth, and has solved the contaminate environment and the problem that takies a large amount of soils of flyash simultaneously.
In preferred version of the present invention, flyash and aqueous sulfuric acid under agitation reacted 8-10 hour, 40-50 rev/min of stirring arm rotating speed.So abundant extraction alumina component wherein.
In another preferred version of the present invention, described residue is mixed with Wingdale (being lime carbonate) and slag, be fired into 425# cement.
Describe the present invention in detail below by embodiment.Embodiment
Grinding flyash with twin-roll machine makes them below 60 purpose granularities, with clear water soak remove foreign material such as the water solubles and weeds after, adding has the 4-6 millimeter to ward off in the reactor of plumbous corrosion-proof lining, reactor has stirring arm, the sulfuric acid of adding 93%, add water to concentration 25%, reaction is 9 hours under 40-50 rev/min of stirring, generate the mixture of aluminum sulfate aqueous solution and surplus slag, make surplus slag sedimentation in the mixture, cooling, telling clarified liq after 3-4 hour clarifies again, clear liquor adds in the vaporizer concentrated, is concentrated into to squeeze into crystallizer or crystallizing pond by pump by the crystalline degree Beaume, pulverizes after the crystallization and promptly obtains the Tai-Ace S 150 finished product.The water vapor of described evaporation is used further to soak raw material after condensation.
Described surplus slag adds in the reactor, with the ammonium hydroxide reaction, tells clear liquor and residue after the clarification, and clear liquor adds slurry tank, and sedimentation goes out Vanadium Pentoxide in FLAKES, through dewatering after and must the Vanadium Pentoxide in FLAKES finished product.
Described residue mixes with Wingdale, slag, is fired into 425# cement with earth kiln or rotary kiln.
Used flyash contains aluminium sesquioxide and the minium of 25-30% (wt), the Vanadium Pentoxide in FLAKES of 1-3% (wt), and the silicon-dioxide of 60-70% (wt) also contains small amount of impurities in addition.
Calculate to handle 100 tons of flyash every day, can produce 2 tons of Vanadium Pentoxide in FLAKESs every day, 50 tons of Tai-Ace S 150,100 tons of 425# cement.
Claims (5)
1. the treatment process of a flyash is characterized in that adding aqueous sulfuric acid in flyash, makes wherein aluminium sesquioxide and minium and sulfuric acid reaction generation Tai-Ace S 150, and solution is separated with surplus slag, makes solution crystallization obtain Tai-Ace S 150 then; Ammonium hydroxide is added in the surplus slag, and the Vanadium Pentoxide in FLAKES reaction with wherein generates ammonium vanadate, and solution is separated with residue, makes solution precipitation go out Vanadium Pentoxide in FLAKES then.
2. method as claimed in claim 1 is characterized in that described residue is used to make cement.
3. method as claimed in claim 2 is characterized in that described residue mixes with Wingdale, slag, is fired into 425# cement.
4. method as claimed in claim 1 is characterized in that described flyash and aqueous sulfuric acid under agitation reacted 8-10 hour.
5. method as claimed in claim 4, when it is characterized in that described stirring, the stirring arm rotating speed is 40-50 rev/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95115678A CN1059880C (en) | 1995-10-24 | 1995-10-24 | Treatment of flyash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95115678A CN1059880C (en) | 1995-10-24 | 1995-10-24 | Treatment of flyash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1149033A true CN1149033A (en) | 1997-05-07 |
| CN1059880C CN1059880C (en) | 2000-12-27 |
Family
ID=5080605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95115678A Expired - Fee Related CN1059880C (en) | 1995-10-24 | 1995-10-24 | Treatment of flyash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059880C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296280C (en) * | 2004-11-12 | 2007-01-24 | 内蒙古蒙西高新技术集团有限公司 | Method for combination producing alumina and cement from chalk and flyash |
| CN1329301C (en) * | 2005-12-31 | 2007-08-01 | 朔州市人民政府 | Process for extracting aluminium hydroxide from flyash |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095689A (en) * | 1994-01-22 | 1994-11-30 | 吉林电力职工大学 | With flyash is the method for raw material production Tai-Ace S 150 |
-
1995
- 1995-10-24 CN CN95115678A patent/CN1059880C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1296280C (en) * | 2004-11-12 | 2007-01-24 | 内蒙古蒙西高新技术集团有限公司 | Method for combination producing alumina and cement from chalk and flyash |
| CN1329301C (en) * | 2005-12-31 | 2007-08-01 | 朔州市人民政府 | Process for extracting aluminium hydroxide from flyash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1059880C (en) | 2000-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |