CN104689979B - A kind of efficiently large arch dam bauxite grinding technology - Google Patents
A kind of efficiently large arch dam bauxite grinding technology Download PDFInfo
- Publication number
- CN104689979B CN104689979B CN201310662893.1A CN201310662893A CN104689979B CN 104689979 B CN104689979 B CN 104689979B CN 201310662893 A CN201310662893 A CN 201310662893A CN 104689979 B CN104689979 B CN 104689979B
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- CN
- China
- Prior art keywords
- sieve
- ore pulp
- district
- screen cloth
- bauxite
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/06—Selection or use of additives to aid disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
-
- 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
nullThe present invention relates to a kind of bauxite grinding technology，Particularly relate to a kind of efficiently large arch dam bauxite grinding technology，After broken, the bauxite of release mesh feeds ball mill through feed belt，Suitable circulation alkali liquor is added in ball mill，Control ore grinding and be admittedly contained in 1000 ~ 1400g/l，After mill, ore pulp is discharged from ball mill ore discharging end，After mill after the stirring of ore pulp dashpot buffering，After utilizing mill, pulp conveying pump pumps into the folded sieve of high frequency，The allocated device is given to high frequency uniformly and folds on every layer of screen cloth of sieve，Ore pulp uniformly spreads out and along stream direction slide downward on screen cloth，During Flow of Goods and Materials，The oversize of lower screen corresponding region is ceaselessly rinsed by sieve ore pulp thoroughly，Final all oversizes are discharged from each layer screen cloth stub area，Feeding of ball mill end it is back to after collecting，All screenings feed after finally collecting in the lower ore pulp dashpot of sieve.Improve screenings ore pulp admittedly to contain, reduce pre-desilication tank quantity, reduce floor space, reduce construction investment.
Description
Technical field
The present invention relates to a kind of bauxite grinding technology, particularly relate to a kind of efficiently large arch dam bauxite grinding technology, belong to technical field of alumina production.
Background technology
Alumina producing is mainly using bauxite as primary raw material.Bauxite utilizes raw material grinding mill to be milled into the bauxite ore pulp of release mesh by adding suitable circulation alkali liquor after crushing, more finally produces finished product aluminum oxide through operations such as pre-desiliconizing, dissolution, seeded precipitation, aluminium hydroxide filtration and roastings.It is one of operation important in alumina producing that raw material grinds, its grind after ore pulp admittedly containing the techniques such as postorder pre-desiliconizing, dissolution are had very important impact.
For a long time, bauxite grinds main employing hydrocyclone and feeds the finishing operations such as pre-desiliconizing as classifying equipoment, the overflow of hydrocyclone as qualified ore pulp, and underflow feeds grinding machine the most again.According to field data, the overflow of hydrocyclone is admittedly containing generally remaining in about 400g/l, and concentration is relatively low.Up-to-date research shows, the folded sieve of straight line (hereinafter referred to as high frequency is folded sieves) of part researcher trial a kind of high oscillation frequencies of employing is as classifying equipoment, but is also faced with some new problems.
When the folded sieve of high frequency is used as fine-graded wet screening equipment, in order to ensure that screening efficiency improves treating capacity, generally require employing substantial amounts of flushing liquor and on-the-sieve material is rinsed.So, substantial amounts of flushing liquor can enter the lower ore pulp of sieve through screen cloth, and under the sieve diluted on the contrary, ore pulp contains admittedly, runs in the opposite direction with the target selecting high frequency to fold sieve.
Grind the qualified ore pulp of operation admittedly contain to be effectively improved raw material, solve high frequency and fold the washing problems of sieve, invented a kind of efficient large arch dam bauxite grinding technology.
Summary of the invention
The present invention is to solve that the problems referred to above provide a kind of efficiently large arch dam bauxite grinding technology, purpose is to improve high frequency to fold screening efficiency and the treating capacity of sieve, improves the lower ore pulp of sieve and admittedly contains to 700 ~ 800g/L, pre-desilication tank quantity is greatly reduced, reduce equipment investment, reduce occupation area of equipment.
nullIn order to achieve the above object，The present invention is achieved in that a kind of efficiently large arch dam bauxite grinding technology，After broken, the bauxite of release mesh feeds ball mill through feed belt，Suitable circulation alkali liquor is added in ball mill，Control ore grinding and be admittedly contained in 1000 ~ 1400g/l，After mill, ore pulp is discharged from ball mill ore discharging end，After mill after the stirring of ore pulp dashpot buffering，After utilizing mill, pulp conveying pump pumps into the folded sieve of high frequency，The allocated device is given to high frequency uniformly and folds on every layer of screen cloth of sieve，Ore pulp uniformly spreads out and along stream direction slide downward on screen cloth，During Flow of Goods and Materials，The oversize of lower screen corresponding region is ceaselessly rinsed by sieve ore pulp thoroughly，Final all oversizes are discharged from each layer screen cloth stub area，Feeding of ball mill end it is back to after collecting，All screenings feed after finally collecting in the lower ore pulp dashpot of sieve.
High frequency folds the folded sieve that sieve is a kind of high oscillation frequencies, and the frequency that shakes is more than 500 beats/min, and the number of plies of screen cloth is more than or equal to 2 layers, and screen cloth have employed height stacking configuration straggly.
The number of plies of screen cloth is equal to 2 layers, and upper sieve is divided into tetra-districts of A, B, C and D, and lower screen is point tetra-districts of A', B', C' and D', correspondence B' district of A district, correspondence C' district of B district, correspondence D' district of C district.
Circulation alkali liquor and corresponding fine size particle in ore pulp mainly sieve thoroughly in A district and B district, and are rinsed the B' district that lower screen is corresponding with C' district oversize.
Lower screen screen size is more than screen cloth corresponding region, upper strata screen size, and fine particle is successively through lower screen.
On-the-sieve material as flushing liquor by the circulation alkali liquor outside supplementary quota, is rinsed, obtains circulation alkali liquor and fine granular materials under sieve by the stub area of upper strata screen cloth.
Obtain circulation alkali liquor and fine granular materials under sieve the oversize of next layer of sieve is rinsed.
Screen size every layer of zones of different incrementally increases along stream direction.
Screenings feeds the lower ore pulp dashpot of sieve after finally collecting after, after buffered stirring, fed pre-desiliconizing finishing operations by the lower pulp conveying pump of sieve.
Advantages of the present invention and effect are as follows: the present invention uses the folded sieve of high frequency as classifying equipoment, the oversize of lower screen is rinsed by the screenings utilizing upper sieve, not only drastically reduce the area flushing liquor consumption, and can significantly improve disposal ability and the screening percentage of ore pulp of multi-laminate sieve, improve screenings ore pulp admittedly to contain, reduce pre-desilication tank quantity, reduce floor space, reduce construction investment.
Accompanying drawing explanation
Fig. 1 is present invention process flow chart.
In figure: 1, feed belt；2, ball mill；3, ore pulp dashpot after mill；4, pulp conveying pump after mill；5, the folded sieve of high frequency；6, the lower ore pulp dashpot of sieve；7, the lower pulp conveying pump of sieve；8, circulation alkali liquor.
Detailed description of the invention
Embodiment to the present invention combines accompanying drawing detailed description below, but protection scope of the present invention is not limited by embodiment.
nullA kind of efficiently large arch dam bauxite grinding technology of the present invention as shown in the figure，After broken, the bauxite of release mesh feeds ball mill 2 through feed belt 1，Suitable circulation alkali liquor 8 is added in ball mill 2，Control ore grinding and be admittedly contained in 1000 ~ 1400g/l，After mill, ore pulp is discharged from ball mill 2 mine-discharging terminal，After mill after the stirring of ore pulp dashpot 3 buffering，After utilizing mill, pulp conveying pump 4 pumps into high frequency and folds sieve 5，The allocated device is given to high frequency uniformly and folds on every layer of screen cloth of sieve，Ore pulp uniformly spreads out and along stream direction slide downward on screen cloth，During Flow of Goods and Materials，The oversize of lower screen corresponding region is ceaselessly rinsed by sieve ore pulp thoroughly，Final all oversizes are discharged from each layer screen cloth stub area，Ball mill 2 feed end it is back to after collecting，All screenings feed after finally collecting in the lower ore pulp dashpot 6 of sieve.
High frequency folds the folded sieve that sieve 5 is a kind of high oscillation frequencies, and the frequency that shakes is more than 500 beats/min, and the number of plies of screen cloth is more than or equal to 2 layers, and screen cloth have employed height stacking configuration straggly.
The number of plies of the present embodiment screen cloth is equal to 2 layers, and upper sieve is divided into tetra-districts of A, B, C and D, and lower screen is point tetra-districts of A', B', C' and D', correspondence B' district of A district, correspondence C' district of B district, correspondence D' district of C district.By that analogy.
Circulation alkali liquor and corresponding fine size particle in ore pulp mainly sieve thoroughly in A district and B district, and are rinsed the B' district that lower screen is corresponding with C' district oversize, improve screening percentage.
Lower screen screen size is more than screen cloth corresponding region, upper strata screen size, and fine particle is successively through lower screen.
The stub area of upper strata screen cloth, the attached circulation alkali liquid measure contained of oversize is considerably less, by supplementary quota outside circulation alkali liquor as flushing liquor, on-the-sieve material is rinsed, under sieve, obtains circulation alkali liquor and fine granular materials.The most not only improve small particles material thoroughly to sieve, improve screening efficiency and treating capacity can also control to sieve the concentration of lower ore pulp.
Obtain circulation alkali liquor and fine granular materials under sieve the oversize of next layer of sieve is rinsed.
Screen size every layer of zones of different incrementally increases along stream direction.
Screenings feeds the lower ore pulp dashpot 6 of sieve after finally collecting after, after buffered stirring, fed pre-desiliconizing finishing operations by the lower pulp conveying pump 7 of sieve.
Claims (8)
1. an efficient large arch dam bauxite grinding technology, it is characterized in that the bauxite of broken rear release mesh feeds ball mill through feed belt, suitable circulation alkali liquor is added in ball mill, control ore grinding and be admittedly contained in 1000 ~ 1400g/l, after mill, ore pulp is discharged from ball mill ore discharging end, after mill after the stirring of ore pulp dashpot buffering, after utilizing mill, pulp conveying pump pumps into the folded sieve of high frequency, the allocated device is given to high frequency uniformly and folds on every layer of screen cloth of sieve, ore pulp uniformly spreads out and along stream direction slide downward on screen cloth, during Flow of Goods and Materials, the oversize of lower screen corresponding region is ceaselessly rinsed by sieve ore pulp thoroughly, final all oversizes are discharged from each layer screen cloth stub area, feeding of ball mill end it is back to after collecting, all screenings feed after finally collecting in the lower ore pulp dashpot of sieve；High frequency folds the folded sieve that sieve is a kind of high oscillation frequencies, and the frequency that shakes is more than 500 beats/min, and the number of plies of screen cloth is more than or equal to 2 layers, and screen cloth have employed height stacking configuration straggly.
One the most according to claim 1 efficient large arch dam bauxite grinding technology, it is characterised in that the number of plies of screen cloth is equal to 2 layers, and upper sieve is divided into tetra-districts of A, B, C and D, lower screen is point tetra-districts of A', B', C' and D', correspondence B' district of A district, correspondence C' district of B district, correspondence D' district of C district.
One the most according to claim 2 efficient large arch dam bauxite grinding technology, it is characterised in that circulation alkali liquor and corresponding fine size particle in ore pulp mainly sieve thoroughly in A district and B district, and are rinsed the B' district that lower screen is corresponding with C' district oversize.
One the most according to claim 1 and 2 efficient large arch dam bauxite grinding technology, it is characterised in that lower screen screen size is more than screen cloth corresponding region, upper strata screen size, fine particle is successively through lower screen.
One the most according to claim 1 and 2 efficient large arch dam bauxite grinding technology, it is characterized in that the stub area of upper strata screen cloth passes through the circulation alkali liquor outside supplementary quota as flushing liquor, on-the-sieve material is rinsed, under sieve, obtains circulation alkali liquor and fine granular materials.
One the most according to claim 5 efficient large arch dam bauxite grinding technology, it is characterised in that obtain circulation alkali liquor and fine granular materials under sieve and the oversize of next layer of sieve is rinsed.
One the most according to claim 1 and 2 efficient large arch dam bauxite grinding technology, it is characterised in that the screen size every layer of zones of different incrementally increases along stream direction.
One the most according to claim 1 efficient large arch dam bauxite grinding technology, it is characterised in that screenings feeds the lower ore pulp dashpot of sieve after finally collecting after, is fed pre-desiliconizing finishing operations by the lower pulp conveying pump of sieve after buffered stirring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662893.1A CN104689979B (en) | 2013-12-10 | 2013-12-10 | A kind of efficiently large arch dam bauxite grinding technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310662893.1A CN104689979B (en) | 2013-12-10 | 2013-12-10 | A kind of efficiently large arch dam bauxite grinding technology |
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| Publication Number | Publication Date |
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| CN104689979A CN104689979A (en) | 2015-06-10 |
| CN104689979B true CN104689979B (en) | 2016-08-31 |
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| CN201310662893.1A Active CN104689979B (en) | 2013-12-10 | 2013-12-10 | A kind of efficiently large arch dam bauxite grinding technology |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106315633A (en) * | 2015-06-24 | 2017-01-11 | 沈阳铝镁设计研究院有限公司 | Preparation method for ore pulp used for production of alumina from diaspore |
| CN106179954B (en) * | 2016-09-07 | 2018-11-06 | 武汉科技大学 | A kind of ore pulp wet vibration screen system and its application method |
| CN114471918B (en) * | 2021-12-22 | 2023-10-03 | 湖南黄金洞矿业有限责任公司 | Uniform distribution screening system in ore grinding process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853535A (en) * | 1971-05-17 | 1974-12-10 | Tatabanyai Szenbanyak | Process for the comminution of particulate alluminaceous materials |
| CN2910356Y (en) * | 2006-02-16 | 2007-06-13 | 中国恩菲工程技术有限公司 | Semi-self-grinding ball mill for ores |
| CN2933575Y (en) * | 2006-07-17 | 2007-08-15 | 贵州成智重工科技有限公司 | Pre-grinding device for ball mill |
| CN101579649A (en) * | 2009-06-01 | 2009-11-18 | 中国铝业股份有限公司 | Grinding method for pipelining slurry in manufacturing process of aluminium oxide |
| CN102921521A (en) * | 2012-11-12 | 2013-02-13 | 湖北鑫鹰环保科技有限公司 | Ore grinding grading method for improving ore grinding processing capacity |
-
2013
- 2013-12-10 CN CN201310662893.1A patent/CN104689979B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3853535A (en) * | 1971-05-17 | 1974-12-10 | Tatabanyai Szenbanyak | Process for the comminution of particulate alluminaceous materials |
| CN2910356Y (en) * | 2006-02-16 | 2007-06-13 | 中国恩菲工程技术有限公司 | Semi-self-grinding ball mill for ores |
| CN2933575Y (en) * | 2006-07-17 | 2007-08-15 | 贵州成智重工科技有限公司 | Pre-grinding device for ball mill |
| CN101579649A (en) * | 2009-06-01 | 2009-11-18 | 中国铝业股份有限公司 | Grinding method for pipelining slurry in manufacturing process of aluminium oxide |
| CN102921521A (en) * | 2012-11-12 | 2013-02-13 | 湖北鑫鹰环保科技有限公司 | Ore grinding grading method for improving ore grinding processing capacity |
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| CN104689979A (en) | 2015-06-10 |
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