CN107051659A - A kind of new milling method for being used to optimize molybdenite flotation behavior - Google Patents
A kind of new milling method for being used to optimize molybdenite flotation behavior Download PDFInfo
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- CN107051659A CN107051659A CN201710437251.XA CN201710437251A CN107051659A CN 107051659 A CN107051659 A CN 107051659A CN 201710437251 A CN201710437251 A CN 201710437251A CN 107051659 A CN107051659 A CN 107051659A
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- ore
- molybdenite
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- aluminium oxide
- oxide ceramic
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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
-
- 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
- B02C17/18—Details
-
- 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
- B02C17/18—Details
- B02C17/20—Disintegrating members
-
- 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
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
A kind of new milling method for being used to optimize molybdenite flotation behavior, belong to technics of metallurgy mineral dressing technical field, it is characterized in that using vertical stirring mill as ore grinding main equipment, aluminium oxide ceramic ball is used for milling medium, and strictly control the technological parameters such as suitable pack completeness, pulp density, slurry temperature, pH values of pulp, grinding aid species and consumption, the favourable liberation degree of minerals for improving mineral, obtains the more uniform ore milling product of granularity.In addition, grinding efficiency is increased substantially, ore grinding power consumption and Mediawear are substantially reduced.
Description
Technical field
The invention belongs to non-ferrous metal ore technical field, it is used to optimize molybdenite flotation behavior more particularly, to a kind of
New milling method.
Background technology
Molybdenite is a kind of preferable sulphide ore of native floatability, and can produce some metals unavoidably in its grinding process
Ion, such as：Fe3+、Ca2+Deng, recovery can be sorted to the follow-up flotation of molybdenite and produces certain inhibitory action, its main cause is,
In certain pH value range, Fe3+、Ca2+Hydroxide precipitation Deng formation can specifically be adsorbed in the surface of molybdenite mineral,
Heterocoagulation is produced, causes molybdenite surface hydrophilic, floatability declines, and these metal ions occur mainly with the mill of molybdenite
In miner's journey.
Following deficiency is primarily present currently for the conventional milling method used in molybdenite ore grinding：
(1) existing by the use of steel ball as milling medium, worn steel ball is serious and produces substantial amounts of irony pollution, in ore grinding mistake
Cheng Zhonghui covers molybdenum mineral surfaces, is unfavorable for the recovery of molybdenum ore thing；
(2) ore milling product size distribution is uneven, and overground and deficient abrasive particle degree is more, influences flotation concentrate product quality；
(3) grinding efficiency is relatively low, and Mediawear cost is higher, and ore grinding power consumption is larger, and ore pulp caking, paste ball etc. easily occurs
Phenomenon.
Therefore exploitation can optimize the new milling method of molybdenite flotation, and finger is sorted to improve in molybdenite ore dressing process
Mark establishes more preferable basic condition, further to improve the grade and the rate of recovery of concentrate, it has also become the emphasis of ore dressing worker
One of research direction.
The content of the invention
It is contemplated that overcoming not enough in existing ore grinding technology, propose a kind of practical and efficiently floated for optimizing molybdenite
The new milling method of choosing, to improve grinding efficiency of the molybdenite in grinding process, and further to optimize follow-up flotation molybdenum
Concentrate product quality creates preferable condition.
In order to achieve the above object, the technical scheme that provides of the present invention is：
, will by changing milling medium and strict control grinding process condition using vertical stirring mill as ore grinding main equipment
Enter to grind mineral materials and be ground to appropriate particle size, supply point that follow-up ore dressing floatation equipment carries out the impurity such as effective mineral and gangue
From；Mill feed material described here is molybdenite ore；Vertical stirring mill specification used in this method is VTM-800, processing
Ability be 50 tons/when~60 tons/when, this method is mainly included the following steps that：
1st, the aluminium oxide ceramic ball of different size is selected, prepares and is mixed into according to the initial proportion of big ball, middle ball and bead
Aluminium oxide ceramic ball milling medium, selection is mixed into ore deposit by the preliminary broken molybdenite ore obtained afterwards and water in appropriate ratio
Slurry；
2nd, the aluminium oxide ceramic ball milling medium mixed will be prepared and ore pulp is respectively added in vertical stirring mill, its
The ratio that geometric volume of the middle aluminium oxide ceramic ball including space between its ball accounts for vertical stirring mill dischargeable capacity is 50%
The pack completeness of the vertical agitator mill of~55%, i.e. aluminium oxide ceramic ball is the 50%~55% of its dischargeable capacity；Milling medium
The ratio that the medium slurry mixture constituted with ore pulp accounts for vertical stirring mill dischargeable capacity is 70%~80%, i.e. medium ore pulp
Pack completeness of the mixture in vertical stirring mill is the 70%~80% of its dischargeable capacity；
3rd, 30 DEG C~40 DEG C of slurry temperature is controlled in grinding process, typically having for temperature is completed by just adding or adding water
Effect control；
4th, the pH for controlling ore pulp is 10~11.5, and CaO pulvis is added generally into ore pulp to complete the adjustment of slurry pH；
5th, grinding aid calgon is added in grinding process, it is inclined that specific addition adds six for ore pulp per ton by mass
The quantity of sodium phosphate is that the addition of 100g~200g, i.e. calgon is 100g/t~200g/t ore pulps；
6th, ore pulp can be released after 90 ± 5% appropriate particle size when molybdenite ore granularity is ground to -0.043mm and accounted for, then
The secondary molybdenite ore loaded in proportion after preliminary crush and water enter next ore grinding and circulated, and through measuring and calculating, reach above-mentioned ore grinding
Appropriate particle size needed for the ore grinding time be 5min~6min.
Further, the chemical composition of the aluminium oxide ceramic ball by percentage to the quality, its Al2O3Content be 91%~
93%th, SiO2Content is that 3%~5%, CaO content is that 1%~2%, content of MgO is that 1%~2%, Fe contents are≤0.2%,
Aluminium oxide ceramic ball Mohs' hardness is 8~9, and proportion is 4g/cm3~5g/cm3。
Further, the addition of molybdenite ore is accounted for the 65%~70% of whole ore pulp weight by dry weight in ore pulp, water
Addition is the pulp density by weight 65%~70% of 30%~35%, i.e. ore grinding.
Further, described aluminium oxide ceramic ball is divided into big ball, three specifications of middle ball and bead, wherein the diameter of big ball
Φ1=20mm~25mm, middle bulb diameter Φ2=10mm~15mm, the small ball's diameter Φ3=5mm~8mm；Enter the molybdenite of ore mill
Stone granularity wants≤3.0mm, and is divided into coarse grain, three ranks of middle grain and particulate, and wherein molybdenite ore granularity is in+1.0mm grades
In the range of for coarse fraction, granularity be in -1.0mm to+0.074mm size fraction ranges for middle grade, in -0.074mm
In the range of level for fine fraction.
Further, the initial proportion of the aluminium oxide ceramic ball of different size is by according to the granularity for feeding grinding machine molybdenite ore
Composition is determined, wherein：Coarse fraction and big ball ratio are 1:1~1:3, middle grade and middle ball ratio are 4:1~1:2, particulate
Level is 1 with bead ratio:2~1:5；To simplify operation, the different size aluminium oxide ceramic ball shared Ceramic Balls in grinding machine
Gross mass ratio is also controllable to big ball and accounts for 40%~50%, middle ball and account for 25%~35%, bead account for 25%~35%.
Further, the follow-up ratio for opening different size aluminium oxide ceramic ball after mill is carried out according to ore milling product granularity
Adjustment, when ore milling product coarse fraction (+0.074mm) content is more, will suitably increase bead ratio, while reducing big ball ratio
Example, every time increase and decrease can be adjusted by 5%；When ore milling product fine fraction (- 0.037mm) content is more, suitably to increase big
Ball ratio, while reducing bead ratio, increase and decrease every time can be adjusted by 5%；Middle ball can not adjust.
Compared with prior art, the technology of the present invention mainly has the advantage that：
(1) the irony dirt that steel ball is effectively reduced as milling medium in grinding process ore pulp is replaced using aluminium oxide ceramic ball
Dye；
(2) obtaining the ore grinding time of suitable grinding particle size (- 0.043mm accounts for 85 ± 5%) can be shortened by 12min~14min
To 5min~6min, grinding efficiency 50%~65% is improved；
(3) the aluminium oxide ceramic ball medium used, because its proportion is relatively low, and medium and medium, medium and ore it
Between friction it is relatively small, ore grinding power consumption 40%~50% can be greatly reduced；
(4) the aluminium oxide ceramic ball medium used, because its hardness is higher, is effectively reduced the medium mill of grinding process
Damage, Mediawear can reduce by 70%~80%；It is dirty that the irony produced when steel ball makees milling medium can also be effectively reduced simultaneously
Dye, it is to avoid influence of the foreign ion to molybdenite flotation；
(5) by rational milling medium size and proportioning, and control suitable grinding condition (pack completeness, pulp density,
Slurry temperature, pH values of pulp, grinding aid species and consumption), be conducive to improving the liberation degree of minerals of mineral, obtain even-grained mill
Mineral products, while ore pulp caking, paste ball degree are also decreased, mineral surfaces are more smooth, reduce other impurities mineral special
It is the covering behavior of iron and its compound on molybdenite thing surface, is that subsequent mineral flotation operation creates advantage.
Embodiment
A kind of new milling method of the optimization molybdenite flotation behavior provided according to the present invention, it is by different size oxygen
Change aluminium Ceramic Balls to be added in vertical mixing mill with certain pack completeness in certain proportion, the molybdenite ore after then crushing
Pour into grinding machine, and water is added by suitable ore milling concentration, start agitator mill, obtain the ore milling product of appropriate particle size.It is used vertical
Formula agitator mill specification be VTM-800, disposal ability be 50 tons/when~60 tons/when.
Specific embodiment is as follows：
Example 1：Grinding operation is carried out for Jiangxi molybdenite, selective oxidation aluminium Ceramic Balls are milling medium, by quality
Percentage meter：Al in aluminium oxide ceramic ball2O3Content be 93%, SiO2It is that 1.5%, MgO is 1.9%, Fe for 3.5%, CaO
For 0.1%；Aluminium oxide ceramic ball Mohs' hardness is 9, and proportion is 4.5g/cm3；Select Φ1=22mm, Φ2=12mm and Φ3=
Tri- kinds of specification aluminium oxide ceramic balls of 8mm, its proportion is respectively 45%, 30%, 25%, and Method of Medium Charge Ratio in Grinder is 55%,
The total pack completeness of medium slurry mixture be 78%, ore milling concentration is 70%, 35 DEG C of slurry temperature, grinding aid calgon plus
Enter amount for 160g/t, pH values of pulp control is 10.5, obtain the ore milling product that granularity accounts for 90% for -0.043mm, then selected at other
Under conditions of miner's skill is constant, the ore milling product manufactured using this method carries out flotation, and it finally obtains flotation molybdenum concentrate containing molybdenum
48.21%th, the excellent index of the rate of recovery 86.54%, compared with conventional ore grinding dressing method, the ore grinding time shortens 55%, ore grinding
Power consumption reduction by 47%, Mediawear reduction by 76%, molybdenum concntrate molybdenum content improves 5.21 percentage points, rate of recovery raising 8.37 hundred
Branch.And the ore dressing plant is produced as a trial by industrializing, and index is stable, and effect is notable.
Example 2：Grinding operation is carried out for Zhejiang molybdenite, selective oxidation aluminium Ceramic Balls are milling medium, by quality
Percentage meter：Al in aluminium oxide ceramic ball2O3Content be 93%, SiO2It is that 1.5%, MgO is 1.9%, Fe for 3.5%, CaO
For 0.1%；Aluminium oxide ceramic ball Mohs' hardness is 9, and proportion is 4.5g/cm3；Select Φ1=22mm, Φ2=12mm and Φ3=
Tri- kinds of specification aluminium oxide ceramic balls of 8mm, its proportion is respectively 40%, 30%, 30%, and Method of Medium Charge Ratio in Grinder is 55%,
The total pack completeness of medium slurry mixture be 75%, ore milling concentration is 70%, 35 DEG C of slurry temperature, grinding aid calgon plus
Enter amount for 150g/t, pH values of pulp control is 11, the ore milling product that granularity accounts for 92% for -0.043mm is obtained, then in other ore dressings
Under conditions of technique is constant, the ore milling product manufactured using this method carries out flotation, and it finally obtains flotation molybdenum concentrate containing molybdenum
49.77%th, the excellent index of the rate of recovery 85.38%, compared with conventional ore grinding dressing method, the ore grinding time shortens 52%, ore grinding
Power consumption reduction by 43%, Mediawear reduction by 72%, molybdenum concntrate molybdenum content improves 6.39 percentage points, rate of recovery raising 7.28 hundred
Branch.And the ore dressing plant is produced as a trial by industrializing, and index is stable, and effect is notable.
As described above, only presently preferred embodiments of the present invention, when the scope that the present invention is implemented can not be limited with this,
The simple equivalent changes and modifications made generally according to scope of the present invention patent and invention description content, all still belongs to this hair
In the range of bright patent covers.
Claims (6)
1. a kind of new milling method for being used to optimize molybdenite flotation, it is characterised in that this method is included with vertical mixing mill
Machine is ore grinding main equipment, is ground the molybdenite ore material for entering mill by changing milling medium and strict control grinding process condition
Appropriate particle size is milled to, the separation that follow-up ore dressing floatation equipment carries out the impurity such as effective mineral and gangue is supplied, this method is made
Vertical stirring mill specification is VTM-800, disposal ability is 50 tons/when~60 tons/when, specifically include following steps：
(1) aluminium oxide ceramic ball of different size is selected, is prepared according to the initial proportion of big ball, middle ball and bead and is mixed into oxidation
Aluminium Ceramic Balls milling medium, selection is mixed into ore pulp by the preliminary broken molybdenite ore obtained afterwards and water in appropriate ratio；
(2) the aluminium oxide ceramic ball milling medium mixed will be prepared and ore pulp is respectively added in vertical stirring mill, wherein,
The pack completeness of the vertical agitator mill of aluminium oxide ceramic ball is the 50%~55% of its dischargeable capacity, milling medium slurry mixture
Pack completeness in vertical stirring mill is the 70%~80% of its dischargeable capacity；
(3) 30 DEG C~40 DEG C of slurry temperature is controlled in grinding process, effective control of temperature is completed by just adding or adding water；
(4) pH for controlling ore pulp is 10~11.5, and CaO pulvis is added into ore pulp to complete the adjustment of slurry pH；
(5) grinding aid calgon is added in grinding process, specific addition adds six inclined phosphorus for ore pulp per ton by mass
The quantity of sour sodium is 100g~200g；
(6) after molybdenite ore granularity, which is ground to -0.043mm, accounts for 90 ± 5% appropriate particle size, release ore pulp, again by than
The molybdenite ore and water that example loads after preliminary crush enter next ore grinding and circulated.
2. a kind of new milling method for being used to optimize molybdenite flotation according to claim 1, it is characterized in that, in method
The chemical composition of the aluminium oxide ceramic ball used is calculated by mass percentage：Containing Al2O3：91%~93%；Containing SiO2：3%~
5%；Containing CaO：1%~2%；Containing MgO：1%~2%；Containing Fe：0~0.2%；And the Mohs' hardness of aluminium oxide ceramic ball be 8~
9, proportion is 4g/cm3~5g/cm3。
3. a kind of new milling method for being used to optimize molybdenite flotation according to claim 1, it is characterized in that, in method
The aluminium oxide ceramic ball of selection is divided into large, medium and small three specifications, wherein, aluminium oxide ceramic ball diameter of phi1During=20mm~25mm
Referred to as big ball；Aluminium oxide ceramic ball diameter of phi2It is referred to as middle ball during=10mm~15mm；Aluminium oxide ceramic ball diameter of phi3=
It is referred to as bead during 5mm~8mm；The molybdenite ore granularity for entering ore mill wants≤3.0mm, and is divided into coarse grain, middle grain and particulate three
Individual rank, wherein, molybdenite ore granularity be in+1.0mm size fraction ranges for coarse fraction, granularity be in -1.0mm to+
In 0.074mm size fraction ranges for middle grade, in -0.074mm size fraction ranges for fine fraction.
4. a kind of new milling method for being used to optimize molybdenite flotation according to claim 1, it is characterized in that, method is carried
To ore pulp in the addition of molybdenite ore account for the 65%~70% of whole ore pulp weight by dry weight, the addition of water for 30%~
The pulp density of 35%, i.e. ore grinding by weight 65%~70%.
5. a kind of new milling method for being used to optimize molybdenite flotation according to claim 1, it is characterized in that in method
The initial proportion of the aluminium oxide ceramic ball of different size will be determined according to the granularmetric composition for feeding grinding machine molybdenite ore, its
In：Coarse fraction and big ball ratio are 1:1~1:3, middle grade and middle ball ratio are 4:1~1:2, fine fraction and bead ratio are 1:
2~1:5；To simplify operation, the different size aluminium oxide ceramic ball shared Ceramic Balls gross mass ratio control in grinding machine is
Big ball, which accounts for 40%~50%, middle ball and accounts for 25%~35%, bead, accounts for 25%~35%.
6. a kind of new milling method for being used to optimize molybdenite flotation according to claim 1, it is characterized in that, in method
The follow-up ratio that different size aluminium oxide ceramic ball opens after mill is adjusted according to ore milling product granularity, when ore milling product coarse fraction
When (+0.074mm) content is more, suitably to increase bead ratio, while reducing big ball ratio, increase and decrease every time is adjusted by 5%
It is whole；When ore milling product fine fraction (- 0.037mm) content is more, suitably to increase big ball ratio, while bead ratio is reduced,
Increase and decrease is adjusted by 5% every time；Middle ball does not adjust.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112844649A (en) * | 2020-12-23 | 2021-05-28 | 中建材蚌埠玻璃工业设计研究院有限公司 | Fine-particle quartz sandstone mineral grinding method |
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Cited By (2)
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| CN107597301A (en) * | 2017-09-08 | 2018-01-19 | 芜湖悠派护理用品科技股份有限公司 | A kind of zeolite grinds preprocess method |
| CN112844649A (en) * | 2020-12-23 | 2021-05-28 | 中建材蚌埠玻璃工业设计研究院有限公司 | Fine-particle quartz sandstone mineral grinding method |
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