CN107601535A - A kind of method of the dispensing of Process for Alumina Production - Google Patents
A kind of method of the dispensing of Process for Alumina Production Download PDFInfo
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- CN107601535A CN107601535A CN201710678961.1A CN201710678961A CN107601535A CN 107601535 A CN107601535 A CN 107601535A CN 201710678961 A CN201710678961 A CN 201710678961A CN 107601535 A CN107601535 A CN 107601535A
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Abstract
A kind of method of the dispensing of Process for Alumina Production, it is related to the improvement of a kind of clinkersintering method in sintering process production alumina process.It is characterized in that its blending process includes being ground the raw material for preparing clinkersintering, after mixing, then raw material pelletizing is carried out, the raw material ball that pelletizing obtains will pass through screening, qualified raw material ball feeding alumina sintering system carries out clinkersintering, and underproof raw material ball returns and re-starts raw material pelletizing.The method of the present invention, its blending process use dry mixing, and dry mixing substantially reduces moisture in raw material, so as to reduce its process energy consumption during drying and preheating.Pelletizing process is added in raw meal proportioning process simultaneously, solid phase reaction of the raw material ball in sintering process is more abundant compared with powder, and rotary kiln is not easy ring formation in the process of running, and returning charge rate is low, and production is more stable.This method can largely reduce the process energy consumption of Process for Alumina Production process, so as to effectively reduce the production cost of sintering process.
Description
Technical field
A kind of method of the dispensing of Process for Alumina Production, it is related to clinkersintering in a kind of sintering process production alumina process
The improvement of method.
Background technology
Sintering process is main method of the China using low-grade bauxite production aluminum oxide, and this method can handle low-grade
With the bauxite of the high organic matter of high-sulfur, and alumina recovery rate is higher, but because the process energy consumption of sintering process is higher, because
This, the enterprise for producing aluminum oxide using this method in recent years is few.Its reason is mainly that the raw meal proportioning method of sintering process is wet
Method dispensing, the moisture content of slurry is about 40%, into rotary kiln after dehydrate causing energy consumption to roll up, according to statistics, oxygen
The energy consumption of the pre- heat dehydration of raw material accounts for the 40% of sintering energy consumption during change aluminium clinkersintering.Obviously a kind of dispensing side of dry method is found
Method is significant.
The content of the invention
The purpose of the present invention introduces a large amount of moisture content aiming at sintering process wet laid furnishes process existing for above-mentioned prior art,
Energy consumption too high problem when causing to sinter, there is provided it is a kind of effectively to reduce energy consumption in raw material drying, warm, while there is anti-material rate
Low, clinker quality is good, the method that rotary kiln is not easy the dispensing of the Process for Alumina Production of ring formation advantage.
The purpose of the present invention is achieved through the following technical solutions.
A kind of method of the dispensing of Process for Alumina Production, it is characterised in that its blending process includes that clinker burning will be prepared
The raw material of knot is ground, and after mixing, then carries out raw material pelletizing, the raw material ball that pelletizing obtains will pass through screening, qualified raw material
Ball feeding alumina sintering system carries out clinkersintering, and underproof raw material ball returns and re-starts raw material pelletizing.
A kind of method of the dispensing of Process for Alumina Production of the present invention, it is characterised in that the clinkersintering raw material prepared
Moisture content be 4% ~ 18%.
A kind of method of the dispensing of Process for Alumina Production of the present invention, it is characterised in that the clinkersintering raw material prepared
Carry out drying levigate, mixing in dry ball, below the granularity requirements 75um of mixed material is 60% ~ 80%.
The method of the dispensing of a kind of Process for Alumina Production of the present invention, it is characterised in that prepare the raw material of clinkersintering
Proportioning is prepared according to the proportioning of conventional sintering technological requirement.
The method of the dispensing of a kind of Process for Alumina Production of the present invention, it is characterised in that pass through the raw material for being milled into dry powder
Disc balling machine pelletizing, the green-ball made sieve by round roller formula screening machine, and screening process green-ball diameter control is in 6 ~ 16mm, sieve
Under underproof green-ball come back for crushing by belt feeder after drying, it is broken after material transport disc balling machine back, again
Pelletizing.Qualified green-ball is sent into sintering system and carries out clinkersintering, and screening process requirement returns ball rate less than 10%.
The method of the dispensing of a kind of Process for Alumina Production of the present invention, it is characterised in that prepare the raw material of clinkersintering
In, including be flyash or the aluminum-containing mineral of red mud.
A kind of method of the dispensing of Process for Alumina Production of the present invention, because moisture is relatively low in raw material ball, it burns
The length of rotary kiln can shorten 1/3 ~ 1/2 in clone system, so as to advantageously reduce system radiating.
A kind of method of the dispensing of Process for Alumina Production of the present invention, blending process use dry mixing, dry mixing
During raw material moisture compared with wet laid furnishes reduce by 30% or so, so as to reduce its process energy consumption during drying and preheating.Together
When in raw meal proportioning process add pelletizing process, solid phase reaction of the raw material ball in sintering process is more abundant compared with powder, and
And rotary kiln is not easy ring formation in the process of running, production is more stable.This method can largely reduce Process for Alumina Production process
Process energy consumption, so as to effectively reduce sintering process production cost.
Embodiment
A kind of method of the dispensing of Process for Alumina Production, its technological process are by bauxite, quick lime（Lime stone）With
The mixed material of soda ash carries out ore grinding and mixing processing by the deployed rear dry ball that enters is matched, and reaches -75um granularity
To 60% ~ 80%, material to be mixed carries out carrying out raw material pelletizing on disc balling machine after reaching granularity requirements, and green-ball diameter control exists
6 ~ 16mm, green-ball moisture are controlled 4% ~ 18%.The green-ball that disc balling machine is produced, which will pass through, justifies roller type sieving machine, under sieve not
Qualified green-ball is sent to ball mill by belt feeder after drying and crushed, and the material after crushing transports disc balling machine back, weight
New pelletizing.Qualified green-ball is sent directly into sintering system and carries out clinkersintering.
The method of the present invention, the aluminum-containing minerals such as flyash or red mud can be used to replace bauxite to carry out dry mixing, matched somebody with somebody
Material process can not also add soda ash or lime according to actual conditions, and due to overall sticky higher, the dispensing of aluminum-containing mineral
Binding agent can not be added or added on a small quantity to process；Qualified green-ball is sent into sintering system and carries out clinkersintering, and screening process will
Ask and return ball rate less than 10%.
The method of the present invention is further described below with reference to example.
Embodiment 1
Certain alumina producer bauxite A/S is 3.4, and by the bauxite, quick lime and soda ash press the mixed material that technological requirement matches
Enter disc balling machine pelletizing after levigate mixing.Balling time is set as 12 minutes, and green-ball diameter control is in 8 ~ 16mm, green-ball water
It is divided into 10%.The green-ball made is subjected to quality testing, the compression strength for drawing green-ball be 18N/ balls, drop strength for 20 times/
0.5m, and burst temperature is only 150 DEG C.
Embodiment 2
Certain alumina producer bauxite A/S is 3.4, and the bauxite enters after the levigate mixing of mixed material of quick lime and soda ash
Disc balling machine pelletizing.Balling time is set as 9 minutes, and for green-ball diameter control in 8 ~ 16mm, green-ball moisture is 10%.It will make
Green-ball carry out quality testing, the compression strength for drawing green-ball is 20N/ balls, and drop strength is 20 times/0.5m, and burst temperature carries
Rise to 190 DEG C.
Embodiment 3
Certain alumina producer bauxite A/S is 3.4, and by the bauxite, quick lime and soda ash press the mixed material that technological requirement matches
Enter disc balling machine pelletizing after levigate mixing.Balling time is set as 9 minutes, and green-ball diameter control is in 8 ~ 10mm, green-ball water
It is divided into 8%.The green-ball made is subjected to quality testing, the compression strength for drawing green-ball be 16N/ balls, drop strength for 18 times/
0.5m, burst temperature can reach 260 DEG C.
Embodiment 4
Certain alumina producer bauxite A/S is 3.4, and the bauxite enters after the levigate mixing of mixed material of quick lime and soda ash
Disc balling machine pelletizing.Balling time is set as 9 minutes, and for green-ball diameter control in 6 ~ 8mm, green-ball moisture is 6%.By what is made
Green-ball carries out quality testing, and 10N/ balls can be reached by drawing the compression strength of green-ball, and drop strength can reach 12 times/0.5m,
Burst temperature can reach 400 DEG C.
Embodiment 5
Certain alumina producer bauxite A/S is 3.4, alumina content 41% in certain fly ash in electric power plant, by a certain amount of bauxite and
Flyash mixes, then enters disc balling machine pelletizing after matching supplying quick lime and the levigate mixing of soda ash progress by technological requirement.
Balling time is set as 9 minutes, and for green-ball diameter control in 6 ~ 8mm, green-ball moisture is 6%.The green-ball made is subjected to quality inspection
Survey, 15N/ balls can be reached by drawing the compression strength of green-ball, and drop strength can reach 18 times/0.5m, and burst temperature can reach
To 340 DEG C.
Embodiment 6
Certain red mud for alumina plant A/S is 1.5, after a certain proportion of red mud is dried, by processing compound and quick lime and soda ash
Enter disc balling machine pelletizing after mixing that mixed material is levigate.Balling time is set as 9 minutes, green-ball diameter control in 6 ~ 8mm,
Green-ball moisture is 6%.The green-ball made is subjected to quality testing, 13N/ balls can be reached by drawing the compression strength of green-ball, be fallen strong
Degree can reach 16 times/0.5m, and burst temperature can reach 320 DEG C.
Embodiment 7
Alumina content 41% in certain fly ash in electric power plant, by a certain amount of flyash, supplying quick lime and pure is matched by technological requirement
Alkali enters disc balling machine pelletizing after carrying out levigate mixing.Balling time is set as 11 minutes, green-ball diameter control in 6 ~ 10mm,
Green-ball moisture is 12%.The green-ball made is subjected to quality testing, 18N/ balls can be reached by drawing the compression strength of green-ball, be fallen
Intensity can reach 18 times/0.5m, and burst temperature can reach 360 DEG C.
Claims (6)
- A kind of 1. method of the dispensing of Process for Alumina Production, it is characterised in that its blending process includes that clinkersintering will be prepared Raw material ground, after mixing, then carry out raw material pelletizing, the raw material ball that pelletizing obtains will pass through screening, qualified raw material ball Feed alumina sintering system and carry out clinkersintering, underproof raw material ball returns and re-starts raw material pelletizing.
- 2. the method for the dispensing of a kind of Process for Alumina Production according to claim 1, it is characterised in that what is prepared is ripe The moisture content for expecting raw materials for sintering is 4% ~ 18%.
- 3. the method for the dispensing of a kind of Process for Alumina Production according to claim 1, it is characterised in that what is prepared is ripe Material raw materials for sintering carry out drying in dry ball it is levigate, mix, below the granularity requirements 75um of mixed material for 60% ~ 80%。
- 4. the method for the dispensing of a kind of Process for Alumina Production according to claim 1, it is characterised in that prepare clinker The raw material proportioning of sintering is prepared according to the proportioning of conventional sintering technological requirement.
- 5. the method for the dispensing of a kind of Process for Alumina Production according to claim 1, it is characterised in that will be milled into doing The raw material of powder is through disc balling machine pelletizing, and the green-ball made sieves by round roller formula screening machine, screening process green-ball diameter control Underproof green-ball is come back for crushing after drying by belt feeder under 6 ~ 16mm, sieve, and the material after crushing transports disk back Pelletizer, again pelletizing.
- 6. the method for the dispensing of a kind of Process for Alumina Production according to claim 1, it is characterised in that prepare clinker In the raw material of sintering, including it is flyash or the aluminum-containing mineral of red mud.
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| CN201710678961.1A CN107601535A (en) | 2017-08-10 | 2017-08-10 | A kind of method of the dispensing of Process for Alumina Production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701321A (en) * | 2019-01-10 | 2019-05-03 | 西北大学 | Utilize the method for trade waste low-temperature sintering preparation Bed Filtration filtrate |
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| CN102108438A (en) * | 2011-02-12 | 2011-06-29 | 西安建筑科技大学 | Method for producing pellets from laterite-nickel ore |
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2017
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| CN1752227A (en) * | 2005-11-01 | 2006-03-29 | 宜昌科博橄榄石有限公司 | Method for producing magnesium olivine iron pellet |
| CN101434403A (en) * | 2008-12-16 | 2009-05-20 | 重庆市博赛矿业（集团）有限公司 | Novel method for processing calx sodica sintered alumina by dry method |
| CN101746791A (en) * | 2009-12-18 | 2010-06-23 | 中国铝业股份有限公司 | Dry sintering method for aluminum oxide clinker |
| CN102108438A (en) * | 2011-02-12 | 2011-06-29 | 西安建筑科技大学 | Method for producing pellets from laterite-nickel ore |
| CN102828022A (en) * | 2012-09-11 | 2012-12-19 | 新兴能源装备股份有限公司 | Production process of pure hematite alkaline pellets |
| CN105399117A (en) * | 2015-11-27 | 2016-03-16 | 中国铝业股份有限公司 | Production method for clinker used in alumina sintering method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701321A (en) * | 2019-01-10 | 2019-05-03 | 西北大学 | Utilize the method for trade waste low-temperature sintering preparation Bed Filtration filtrate |
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Application publication date: 20180119 |