CN104628019A - Method for separating and recovering aluminum oxide form coal ash - Google Patents
Method for separating and recovering aluminum oxide form coal ash Download PDFInfo
- Publication number
- CN104628019A CN104628019A CN201310568859.8A CN201310568859A CN104628019A CN 104628019 A CN104628019 A CN 104628019A CN 201310568859 A CN201310568859 A CN 201310568859A CN 104628019 A CN104628019 A CN 104628019A
- Authority
- CN
- China
- Prior art keywords
- aluminum oxide
- coal ash
- calcination
- flyash
- separation
- 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.)
- Pending
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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
Abstract
The invention discloses a method for separating and recovering aluminum oxide form coal ash. The method comprises the following steps: dissolving separated coal ash by hydrochloric acid while controlling the dissolving temperature at 60-80 DEG C; press-filtering; removing filter residues; adding ammonium hydrogen carbonate into the filtrate; filtering; and feeding a precipitate aluminum carbonate into a burning kiln to be burned at 600-800 DEG C for 20-60 minutes to obtain a finished product aluminum oxide. The method disclosed by the invention not only can extract aluminum element from coal ash with high content of aluminum, but also can extract aluminum element by using common coal ash.
Description
Technical field
The present invention relates to a kind of trade waste method of comprehensive utilization, be specifically related to a kind of method of Separation and Recovery aluminum oxide from flyash.
Background technology
The major industry fuel of Mei Shi China, the annual flyash number produced is in hundred million tons, and a large amount of flyash not only takies a large amount of soils, contaminate environment, meanwhile, also has a large amount of valuable elements to be wasted in flyash.In recent years, although the utilization of flyash develops to some extent, be mostly used as the laying on the making of building block, road basis, utility value is not improved accordingly.
Summary of the invention
Technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of method of Separation and Recovery aluminum oxide from flyash.
Technical problem to be solved by this invention is realized by following technical scheme.The present invention is a kind of method of Separation and Recovery aluminum oxide from flyash, be characterized in: the flyash hydrochloric acid through being separated is dissolved, solvent temperature controls at 60-80 DEG C, press filtration, removing filter residue, adds bicarbonate of ammonia in filtrate, filter, sent in calcination kiln by throw out aluminium carbonate and carry out calcination, calcination temperature is 600-800 DEG C, and calcination time is the aluminium sesquioxide that gets product for 20-60 minutes.
Compared with prior art, the present invention not only can extract aluminium element from height containing the coal ash of aluminium, and common coal ash also can be utilized to extract aluminium element.
Embodiment
Below further describe concrete technical scheme of the present invention, so that those skilled in the art understands the present invention further, and do not form the restriction to its right.
Embodiment 1, a kind of method of Separation and Recovery aluminum oxide from flyash, pulverizes flyash, carry out acid-soluble at 60-80 DEG C of temperature with the hydrochloric acid of 20-30% concentration, question response stops, and filters, removing filter residue, retain filtrate, in filtrate, add bicarbonate of ammonia precipitate, filter, throw out aluminium carbonate calcination kiln is carried out calcination, calcination temperature is 600-800 DEG C, and calcination time is the aluminium sesquioxide that gets product for 20-60 minutes.
Claims (4)
1. the method for Separation and Recovery aluminum oxide from flyash, is characterized in that raw materials used is discarded flyash, through pulverizing, acid-soluble, filter, alkali is heavy, filter, calcination forms.
2. the method for a kind of Separation and Recovery aluminum oxide from flyash according to claim 1, it is characterized in that described acid-soluble be carry out acid-soluble at 60-80 DEG C of temperature with the hydrochloric acid of 20-30% concentration.
3. the method for a kind of Separation and Recovery aluminum oxide from flyash according to claim 1, it is characterized in that described alkali heavy be filter gained filtrate by the with this to precipitate with bicarbonate of ammonia.
4. the method for a kind of Separation and Recovery aluminum oxide from flyash according to claim 1, it is characterized in that described calcination carries out calcination with calcination kiln, calcination temperature is 600-800 DEG C, and calcination time is 20-60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310568859.8A CN104628019A (en) | 2013-11-15 | 2013-11-15 | Method for separating and recovering aluminum oxide form coal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310568859.8A CN104628019A (en) | 2013-11-15 | 2013-11-15 | Method for separating and recovering aluminum oxide form coal ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104628019A true CN104628019A (en) | 2015-05-20 |
Family
ID=53207327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310568859.8A Pending CN104628019A (en) | 2013-11-15 | 2013-11-15 | Method for separating and recovering aluminum oxide form coal ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104628019A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753026A (en) * | 2016-04-11 | 2016-07-13 | 北京世纪地和控股有限公司 | Method for recycling aluminum oxide from coal ash |
| CN106492518A (en) * | 2016-10-03 | 2017-03-15 | 上海库儿科技有限公司 | A kind of quickly nanometer carbon solution is concentrated and nanometer carbon deposition and detached method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811711A (en) * | 2010-04-27 | 2010-08-25 | 中国神华能源股份有限公司 | Method for extracting aluminum oxide from fly ash |
| CN101863498A (en) * | 2010-04-27 | 2010-10-20 | 中国神华能源股份有限公司 | Method for recycling acid in process of producing alumina from fly ash by acid method |
| CN102515227A (en) * | 2011-12-23 | 2012-06-27 | 西安航天科技工业公司 | Method for extracting alumina from fly ash based on grinding and acid leaching technology |
| CN102849767A (en) * | 2012-04-10 | 2013-01-02 | 沈阳金博新技术产业有限公司 | Method for preparing alumina by using power plant fly ash |
-
2013
- 2013-11-15 CN CN201310568859.8A patent/CN104628019A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811711A (en) * | 2010-04-27 | 2010-08-25 | 中国神华能源股份有限公司 | Method for extracting aluminum oxide from fly ash |
| CN101863498A (en) * | 2010-04-27 | 2010-10-20 | 中国神华能源股份有限公司 | Method for recycling acid in process of producing alumina from fly ash by acid method |
| CN102515227A (en) * | 2011-12-23 | 2012-06-27 | 西安航天科技工业公司 | Method for extracting alumina from fly ash based on grinding and acid leaching technology |
| CN102849767A (en) * | 2012-04-10 | 2013-01-02 | 沈阳金博新技术产业有限公司 | Method for preparing alumina by using power plant fly ash |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105753026A (en) * | 2016-04-11 | 2016-07-13 | 北京世纪地和控股有限公司 | Method for recycling aluminum oxide from coal ash |
| CN106492518A (en) * | 2016-10-03 | 2017-03-15 | 上海库儿科技有限公司 | A kind of quickly nanometer carbon solution is concentrated and nanometer carbon deposition and detached method |
| CN106492518B (en) * | 2016-10-03 | 2019-05-28 | 上海库儿科技有限公司 | A method of quickly the concentration of nanometer carbon solution and nanometer carbon deposition and separation |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150520 |