CN103848448B - A kind of raw material pelletizing and preparation method being applied to flyash production alumina technology - Google Patents
A kind of raw material pelletizing and preparation method being applied to flyash production alumina technology Download PDFInfo
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- CN103848448B CN103848448B CN201210496120.6A CN201210496120A CN103848448B CN 103848448 B CN103848448 B CN 103848448B CN 201210496120 A CN201210496120 A CN 201210496120A CN 103848448 B CN103848448 B CN 103848448B
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- flyash
- ammonium sulfate
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Abstract
The present invention relates to one to relate to " flyash-ammonium sulfate sintering process " and produce raw material pelletizing and preparation method in alumina technology, disclose a kind of the raw material pelletizing and the preparation method that are applied to flyash production alumina technology, flyash and these two kinds of discrepant materials of character of ammonium sulfate can be pressed into the uniform raw material pelletizing of component by the method.Pelletizing monomer density is 1.3 ~ 1.6g/mm3, pelletizing tap density 800 ~ 1000kg/m3, pelletizing initial strength 400 ~ 650N, intensity 1200 ~ 1500N after pelletizing heating; Pelletizing specification (ellipsoid major axis) 40 ~ 70mm; Each components by weight of pelletizing is: 1 part, flyash, 3.0 ~ 3.1 parts, ammonium sulfate.Advantage of the present invention is: the present invention not only effectively solves and adopts the raw material produced in dry powder raw material sintering process to dissolve sticky kiln problem, and solves the energy consumption high problem that wet type pelletizing causes.According to every physical index of this pelletizing, this pelletizing can meet the production requirement of rotary system, and realizes energy-conservation.
Description
Technical field
The present invention relates to a kind of the raw material pelletizing and the preparation method that are applied to flyash production alumina technology, particularly relate to one and relate to cold pressing raw material pelletizing and the preparation method that " flyash-ammonium sulfate sintering process " produces flyash in alumina technology.
Background technology
Adopt flyash to produce the processing method of aluminum oxide a lot, wherein " flyash-ammonium sulfate sintering process " produce alumina technology be adopt flyash and ammonium sulfate to sinter in rotary kiln method to produce aluminum oxide.
In this production method, flyash and ammonium sulfate adopt the mode of dry powder blend to configure dry powder raw material by some process programs, and the raw material after configuration enter rotary kiln sintered.But raw material are bonded on rotary kiln wall after melting in sintering process, namely affect heat transfer, be difficult to cleaning again.
Some process programs adopt wet type pellet forming process, namely in flyash, ammonium sulfate dry powder, add a small amount of clear water, enter rotary kiln sintered with dribbling balling machine after being prepared into raw material ball again.Such process program solves raw material and is bonded in problem on rotary kiln, but owing to the addition of water in pelletizing, in sintering process, increases sintering energy consumption.Meanwhile, this kind of pellet strength difference, easily produces pelletizing cracked in sintering process.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of the raw material pelletizing and the preparation method that are applied to flyash production alumina technology, concrete scheme is as follows:
Be applied to the raw material pelletizing that flyash produces alumina technology, each components by weight of described raw material pelletizing is: 1 part, flyash, 3.0 ~ 3.1 parts, ammonium sulfate; Described pelletizing is coal-pressing ball.
In described flyash, quality of alumina content is more than or equal to 35%.
Described ammonium sulfate is technical grade powder ammonium sulfate.
Described pelletizing monomer density is 1.3 ~ 1.6g/mm
3.
Described pelletizing tap density 800 ~ 1000kg/m
3.
Described pelletizing initial strength 400 ~ 650kg/cm
2, intensity 1200 ~ 1500N after preheating.
For ensureing better sintering effect, make pelletizing non-caked on rotary kiln wall, ensure that again pellet strength is good, in sintering process, pelletizing is not cracked, and described pelletizing shape is olive shape; Described pelletizing major axis is 40 ~ 70mm.
The present invention also discloses a kind of method preparing described pelletizing, is 1 part, flyash by weight by flyash and ammonium sulfate, after the ratio that ammonium sulfate is 3.0 ~ 3.1 parts mixes in mixing machine, enters high-pressure ball press compacting raw material pelletizing.
The pressure of high-pressure ball press is 8 ~ 11t/cm.
Advantage of the present invention is: the present invention not only effectively solves and adopts the raw material produced in dry powder raw material sintering process to dissolve sticky kiln problem, and solves the energy consumption high problem that wet type pelletizing causes.According to every physical index of this pelletizing, this pelletizing can meet the production requirement of rotary system, and realizes energy-conservation.
Embodiment
Preparation method of the present invention is according to the following steps:
Flyash adopts fine grain ash, if include macrobead bottom slag composition in flyash, then macrobead part uses after needing fine grinding, and in flyash, alumina content requires to be greater than 35%.Ammonium sulfate adopts technical grade powder ammonium sulfate, requires not containing large particle crystal body.
Mix in flyash and ammonium sulfate feeding mixing machine in the ratio of the ammonium sulfate of 1 part of flyash proportion 3.0 ~ 3.1 parts, high-pressure ball press sent into by the raw material after mixing.
The pressure of high-pressure ball press is 8 ~ 11t/cm, and ball press is speed control by frequency variation, and the raw material pelletizing of ball press compacting is olive shape.Pelletizing specification is 40 ~ 60mm (major axis).
The raw material ball single group volume density of preparation is 1.3 ~ 1.6g/mm
3, pelletizing tap density 800 ~ 1000kg/m
3; Initial strength 400 ~ 650N after pelletizing preparation, after pelletizing heating, pellet strength can reach 1200 ~ 1500N.
Claims (6)
1. be applied to the raw material pelletizing that flyash produces alumina technology, it is characterized in that: each components by weight of described raw material pelletizing is: 1 part, flyash, 3.0 ~ 3.1 parts, ammonium sulfate; Described pelletizing is coal-pressing ball; Described pelletizing shape is olive shape.
2. raw material pelletizing according to claim 1, is characterized in that: in described flyash, quality of alumina content is more than or equal to 35%.
3. raw material pelletizing according to claim 1, is characterized in that: described ammonium sulfate is technical grade powder ammonium sulfate.
4. raw material pelletizing according to claim 1, is characterized in that: described pelletizing tap density 800 ~ 1000kg/m
3.
5. raw material pelletizing according to claim 1, is characterized in that: described pelletizing major axis is 40 ~ 70mm.
6. prepare a method for pelletizing according to claim 1, it is characterized in that: by flyash and ammonium sulfate by weight being 1 part, flyash, after the ratio that ammonium sulfate is 3.0 ~ 3.1 parts mix in mixing machine, entering high-pressure ball press and suppressing raw material pelletizing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210496120.6A CN103848448B (en) | 2012-11-28 | 2012-11-28 | A kind of raw material pelletizing and preparation method being applied to flyash production alumina technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210496120.6A CN103848448B (en) | 2012-11-28 | 2012-11-28 | A kind of raw material pelletizing and preparation method being applied to flyash production alumina technology |
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| Publication Number | Publication Date |
|---|---|
| CN103848448A CN103848448A (en) | 2014-06-11 |
| CN103848448B true CN103848448B (en) | 2016-01-06 |
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| CN201210496120.6A Active CN103848448B (en) | 2012-11-28 | 2012-11-28 | A kind of raw material pelletizing and preparation method being applied to flyash production alumina technology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3809883A1 (en) * | 1988-03-24 | 1989-10-05 | Solvay Werke Gmbh | Process for producing pelleted fly ash |
| CN1720340A (en) * | 2002-12-02 | 2006-01-11 | 科学与工业研究会 | Cold briquetting and pelletisation |
| KR20090032806A (en) * | 2007-09-28 | 2009-04-01 | 한국전력공사 | Extraction method and apparatus of high pure alumina from fly ash using microwave |
| CN102344155A (en) * | 2010-07-30 | 2012-02-08 | 沈阳铝镁设计研究院有限公司 | Method for preparing alumina from fly ash |
| CN102583468A (en) * | 2012-03-08 | 2012-07-18 | 航天推进技术研究院 | Method for extracting aluminum oxide from fly ash based on ammonium sulfate activation process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230073B (en) * | 2011-06-14 | 2013-06-12 | 李国三 | Method for producing magnetic iron ore by using limonite |
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2012
- 2012-11-28 CN CN201210496120.6A patent/CN103848448B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3809883A1 (en) * | 1988-03-24 | 1989-10-05 | Solvay Werke Gmbh | Process for producing pelleted fly ash |
| CN1720340A (en) * | 2002-12-02 | 2006-01-11 | 科学与工业研究会 | Cold briquetting and pelletisation |
| KR20090032806A (en) * | 2007-09-28 | 2009-04-01 | 한국전력공사 | Extraction method and apparatus of high pure alumina from fly ash using microwave |
| CN102344155A (en) * | 2010-07-30 | 2012-02-08 | 沈阳铝镁设计研究院有限公司 | Method for preparing alumina from fly ash |
| CN102583468A (en) * | 2012-03-08 | 2012-07-18 | 航天推进技术研究院 | Method for extracting aluminum oxide from fly ash based on ammonium sulfate activation process |
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