CN103736603B - A kind of ore-dressing technique of grind grading - Google Patents
A kind of ore-dressing technique of grind grading Download PDFInfo
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- CN103736603B CN103736603B CN201310729568.2A CN201310729568A CN103736603B CN 103736603 B CN103736603 B CN 103736603B CN 201310729568 A CN201310729568 A CN 201310729568A CN 103736603 B CN103736603 B CN 103736603B
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Abstract
The present invention provides the ore-dressing technique of a kind of grind grading, comprise the following steps: raw ore is placed in classifying cyclone and carries out classification by (1), after classified, the sand setting of classifying cyclone enters ball mill to carry out ball milling and is then fed into classifying cyclone and proceeds classification, and the overflow of classifying cyclone enters high frequency vibrating fine screen and carries out further classification；(2) overflow of classifying cyclone is after described high frequency vibrating fine screen carries out classification, and lower part of screen is divided into qualified grain size, sieve upper part to enter dewatering cyclone and be dehydrated；(3) after sieve top lease making dewatering cyclone is dehydrated, the classifying cyclone that the overflow of dewatering cyclone is sent back in step (1) proceeds classification, and the sand setting of dewatering cyclone is sent into ball mill and carried out the classifying cyclone that ball milling is then returned in step (1) and proceed classification.According to the present invention, the efficiency of grind grading can be improved, eliminate light mineral coarse granule Infinite Cyclic phenomenon in grinding classification system, its production technology strong adaptability.
Description
Technical field
The present invention relates to the ore-dressing technique of a kind of grind grading, it is more particularly related to one can
Eliminate light mineral coarse granule ore-dressing technique of the grind grading of Infinite Cyclic in grinding classification system.
Background technology
Ore by the thickness of granule and the big I of density be divided into heavy mineral coarse granule, heavy mineral fine grained,
Light mineral coarse granule and light mineral fine grained.Ore grinding-classification operation of the prior art use mainly by
Classifying cyclone, high frequency vibrating fine screen and the grind grading combined system of ball mill composition.
Fig. 1 shows the flow chart of the ore-dressing technique of grind grading of the prior art.Ore enters classification
After cyclone, heavy mineral coarse granule carries out ball milling, as the sand setting entrance ball mill of cyclone after ball milling again
Return classifying cyclone and carry out classification；Heavy mineral fine grained, light mineral coarse granule and light mineral fine grained are made
Overflow for cyclone enters high frequency vibrating fine screen.After high frequency vibrating fine screen classification, lower part of screen is divided into
Heavy mineral fine grained and light mineral fine grained, for qualified grain size, enter the sorting operation of downstream.So
And, find aborning, when the sieve upper part (that is, light mineral coarse granule) of high frequency vibrating fine screen is direct
Enter ball mill or can not flow automatically goal grinding machine but enter the ore discharge pump pond of ball mill, all can cause sieve
The light mineral coarse granule of upper part is mainly being made up of classifying cyclone, high frequency vibrating fine screen, ball mill
Infinite Cyclic in grind grading combined system, classification efficiency is more and more lower.
Summary of the invention
It is an object of the invention to provide the ore-dressing technique of a kind of grind grading, can improve according to the present invention
The efficiency of grind grading, eliminates light mineral coarse granule Infinite Cyclic phenomenon in grinding classification system, its
Controlling of production process is simple, strong adaptability.
To achieve these goals, the invention provides the ore-dressing technique of a kind of grind grading, described ore dressing
Technique comprises the following steps: raw ore is placed in classifying cyclone and carries out classification by (1), classified after, point
The sand setting of level cyclone enters ball mill to carry out ball milling and is then fed into classifying cyclone and proceeds classification, point
The overflow of level cyclone enters high frequency vibrating fine screen and carries out further classification；(2) overflow of classifying cyclone
After described high frequency vibrating fine screen carries out classification, lower part of screen is divided into qualified grain size, sieve upper part to enter dehydration
Cyclone is dehydrated；(3) after sieve top lease making dewatering cyclone is dehydrated, overflowing of dewatering cyclone
The classifying cyclone that streaming is returned in step (1) proceeds classification, and the sand setting of dewatering cyclone sends into ball milling
Machine carries out the classifying cyclone that ball milling is then returned in step (1) and proceeds classification.
According to an aspect of the present invention, the Ore that can control in described classifying cyclone accounts for classifying cyclone
In ore pulp percentage by weight 55%～60%, the Ore that can control in described high frequency vibrating fine screen accounts for
The 30%～35% of the percentage by weight of the ore pulp in high frequency vibrating fine screen, can control in described ball mill
Ore accounts for the 70%～75% of the percentage by weight of the ore pulp in ball mill.
According to an aspect of the present invention, in step (1), described raw ore can be that vanadium titano-magnetite is through de-
Vanadium takes off the strong magnetic gold mine after titanium.
According to an aspect of the present invention, in step (1), described raw ore can be to obtain after sloping plate grading
To the Ore being made up of coarse grain and particulate, wherein, granularity is coarse grain more than the Ore of 0.1mm, granularity
Ore less than 0.1mm is particulate.
According to the present invention it is possible to improve the efficiency of grind grading, eliminate light mineral coarse granule at grind grading
Infinite Cyclic phenomenon in system, its production technology strong adaptability.
Accompanying drawing explanation
Fig. 1 shows the flow chart of the ore-dressing technique of grind grading of the prior art.
Fig. 2 shows the flow chart of the ore-dressing technique of the grind grading according to the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the ore-dressing technique of a kind of grind grading according to the present invention is carried out in detail
Explanation.But, they can be implemented in different forms, and should not be interpreted as limited to illustrate here
Embodiment.On the contrary, it is provided that these embodiments make the disclosure to be thoroughly with complete, and will be showing
The scope of example embodiment is fully conveyed to those skilled in the art.
Hereinafter, the dresser of a kind of grind grading of the exemplary embodiment according to the present invention will be described
Skill.
The ore-dressing technique of the grind grading according to the present invention comprises the following steps: raw ore is placed in classification by (1)
Cyclone carries out classification, classified after, the sand setting of classifying cyclone enters ball mill and carries out ball milling then
Sending into classifying cyclone and proceed classification, the overflow of classifying cyclone enters high frequency vibrating fine screen and enters
One step classification；(2) overflow of classifying cyclone is after described high frequency vibrating fine screen carries out classification, lower part of screen
It is divided into qualified grain size, sieve upper part to enter dewatering cyclone and be dehydrated；(3) sieve top lease making dehydration rotation
After stream device is dehydrated, the classifying cyclone that the overflow of dewatering cyclone is sent back in step (1) proceeds
Classification, the sand setting of dewatering cyclone is sent into ball mill and is carried out the classification rotation that ball milling is then returned in step (1)
Stream device proceeds classification.
Fig. 2 shows the flow chart of the ore-dressing technique of the grind grading according to the present invention.Raw ore is through step (1)
Classifying cyclone classification after, as classifying cyclone sand setting heavy mineral coarse granule enter ball mill enter
Enter back into classifying cyclone after row ball milling and carry out classification；Thin of the heavy mineral as the overflow of classifying cyclone
Grain, light mineral coarse granule and light mineral fine grained enter high frequency vibrating fine screen and carry out classification.Classifying cyclone
Overflow after high frequency vibrating fine screen classification, lower part of screen is divided into heavy mineral fine grained and light mineral fine grained,
These two kinds of granules enter the sorting operation of downstream as qualified grain size；Sieve top lease making dewatering cyclone
After dehydration, the light mineral coarse granule entrance ball mill as the sand setting of dewatering cyclone carries out ball milling the most again
Enter classifying cyclone classification, as the water of overflow and a small amount of fine grained of dewatering cyclone, will be main
When carrying out ball milling as ball mill, ore pulp adds water.Here, the classification of Ore is performed as follows: proportion
Being heavy mineral more than the Ore of 2.9 tons/cubic metre, proportion is light ore deposit less than the Ore of 2.9 tons/cubic metre
Thing；The granularity Ore more than 0.1mm is coarse granule, and the granularity Ore less than 0.1mm is fine grained.
In step (1), raw ore is placed in classifying cyclone carries out classification, it is therefore an objective to raw ore is being sent
Before entering ore mill, first fine fraction qualified in raw ore is separated.When in raw ore, qualified grain size contains
When amount is more than 15%, carries out classification initially with classifying cyclone and fine grain mistake can be avoided to pulverize, prevent
The argillization harmful effect to classification process.
According to one embodiment of present invention, in step (1), the ore deposit in described classifying cyclone is controlled
Stone accounts for the 55%～60% of the percentage by weight of the ore pulp in classifying cyclone.When Ore in classifying cyclone
Weight percent content is higher than the 60% of ore pulp or less than the 55% of ore pulp, all will affect classifying cyclone
Classification efficiency.If pulp density is little, then the viscosity of ore pulp also decreases, therefore the sedimentation speed of ore particle
Degree is accelerated the most therewith, and the overflow product granularity obtained is also the thinnest；If the concentration of ore pulp is big, then overflow
The granularity of product will be more slightly.But, after pulp density is reduced to a certain degree, if pulp density
Continue to reduce, overflow product granularity can be made the most on the contrary thicker.This is because, when pulp density reduces a lot
Time, then the volume (or ore pulp amount) of ore pulp is the biggest, makes the flow rate of pulp (upflow velocity in grader
With horizontal flow velocity) it is consequently increased, therefore, thicker ore particle is also punched in overflow product.Cause
This, in the present invention, (that is, Ore accounts for the weight hundred of ore pulp to control the pulp density in classifying cyclone
Proportion by subtraction content) it is 55%～60%.According to the present invention, in ball mill, enter the Ore in classifying cyclone
The pulp density in classifying cyclone can be made to reach 70%～75%, therefore can reduce classifying cyclone by moisturizing
The concentration of middle ore pulp so that it is pulp density reaches 55%～60%.
In step (1), according to one embodiment of present invention, raw ore can be that vanadium titano-magnetite is through de-
Vanadium takes off the strong magnetic gold mine after titanium.According to still another embodiment of the invention, raw ore can be through sloping plate grading
After the Ore being made up of coarse granule and fine grained that obtains, wherein, the granularity Ore more than 0.1mm is thick
Granule, the granularity Ore less than 0.1mm is fine grained.But the invention is not restricted to this, raw ore is all right
Other Ore needing to carry out grinding grading technique known to those skilled in the art.
In step (2), high frequency vibrating fine screen carries out classification by the granularity of ore particle to Ore, can during production
According to required granularity level, the aperture of high frequency vibrating fine screen is adjusted.If ore grain size is more than height
The aperture of frequency vibration dusting cover, then this part Ore is sieve upper part, if ore grain size is less than dither
The aperture of dusting cover, then this part Ore is that lower part of screen is divided.Owing to high frequency vibrating fine screen is by the granularity of ore particle
Carry out classification, be little affected by the impact of Ore density, therefore can ensure higher classification efficiency.
According to one embodiment of present invention, in step (2), control the Ore in high frequency vibrating fine screen
Account for ore pulp in high frequency vibrating fine screen percentage by weight 30%～35%.If the percentage by weight of Ore contains
Amount is higher than the 35% of ore pulp or less than the 30% of ore pulp, all will affect the classification efficiency of high frequency vibrating fine screen.
Specifically, if pulp density is too high, then screening efficiency will be caused to reduce；The most within the specific limits
Pulp density is the least, and classification efficiency is the highest.But, if pulp density is less than certain value, can drop on the contrary
Low classification efficiency, this is because the little content that can reduce valuable rock of pulp density.If classifying cyclone
The percentage by weight of middle pulp density is 55%～60%, then in the overflow of classifying cyclone, pulp density is general
It is not less than 30%～35%, therefore can reduce the concentration of ore pulp in high frequency vibrating fine screen by moisturizing so that it is
The percentage by weight of pulp density is 30%～35%.
In step (3), dewatering cyclone is mainly used in effective dehydration of various mineral slurry, it is to avoid have
With the loss of mineral, and the overflow water of dewatering cyclone is after settlement, re-uses, escapable cost.
According to one embodiment of present invention, in step (1) and step (3), control in ball mill
Ore account for ore pulp in ball mill percentage by weight 70%～75%.When the containing of solid ore particle in ore pulp
When measuring higher, ore pulp viscosity is relatively big, and around medium, the ore particle of adhesion is the most, and medium hits and grinds ore particle
Probability increase, grinding efficiency improve.But, ore milling concentration can not be the highest, otherwise will be substantially reduced
The impulsive force of medium and grinding activeness, reduce grinding efficiency；And pulp density is too big, ore pulp flows
Property poor, coarse-grained material sinks slowly, and overflowball mill easily runs out of coarse sand, grate ball mill then may
Occur to block and cause " swollen tripe ".On the other hand, when pulp density is relatively low, medium having in ore pulp
Effect density is relatively big, and during whereabouts, impulsive force is relatively strong, but ore pulp viscosity is relatively low, adhesion ore deposit onto a media surface in response
Grain is less, and abrasive action reduces, and the abrasion of medium and liner plate increase；Meanwhile, relatively low when pulp density
Time, the fine grained in overflowball mill the most easily avales, and the mistake of generation is pulverized more.
In the prior art, the sieve upper part of high frequency vibrating fine screen enter back into classifying cyclone carry out classification (as
Shown in Fig. 1) or be directly entered ball mill and carry out ball milling.When the sieve upper part of high frequency vibrating fine screen enters back into
Classifying cyclone carries out classification can cause light mineral coarse granule Infinite Cyclic in grinding classification system；If it is high
The sieve upper part of frequency vibration dusting cover is directly entered ball mill and carries out ball milling, then can reduce the ore pulp in ball mill
Concentration, thus reduce the classification efficiency of Ore.But, according to the present invention, by combining at grind grading
System increases dewatering cyclone so that the sieve top lease making dewatering cyclone of high frequency vibrating fine screen takes off
Enter back into ball mill after water, thus improve the pulp density in ball mill, and then improve ball mill
Grinding efficiency.Additionally, according to the present invention, the overflow of dewatering cyclone is water and a small amount of fine grained, if
When pulp density in ball mill is too high, the overflow of dewatering cyclone will carry out ball milling mainly as ball mill
Time ore pulp add water.According to the present invention, the Ore in ball mill accounts for the weight percent of ore pulp in ball mill
Ratio can be adjusted by the overflow of dewatering cyclone.According to one exemplary embodiment of the present invention control
In ball mill, the percentage by weight of pulp density is 70%～75%.
Example
The method using the present invention carries out ore dressing to raw ore, and wherein, in raw ore, ore grain size is less than 0.074mm
Mineral content be 30%.As in figure 2 it is shown, after the classified cyclone classification of raw ore, classifying cyclone
In overflow, the ore grain size mineral content less than 0.074mm is 52%, after high frequency vibrating fine screen classification,
Lower part of screen divides the middle ore grain size mineral content less than 0.074mm to be 67%, ore grain size in sieve upper part
Mineral content less than 0.074mm is 6%.After running 2 months continuously, after classified cyclone classification,
In the overflow of classifying cyclone, the ore grain size mineral content less than 0.074mm is 53%, through dither
After fine screening classification, lower part of screen divides the middle ore grain size mineral content less than 0.074mm to be 68%, sieves top
In point, the ore grain size mineral content less than 0.074mm is 6%.
Therefore, the ore-dressing technique of grind grading using the present invention to provide carries out ore dressing, classifying cyclone,
High frequency vibrating fine screen classification efficiency is basically unchanged.
Comparative example
Using prior art that raw ore carries out ore dressing, wherein, in raw ore, ore grain size is less than 0.074mm's
Mineral content is 30%.As it is shown in figure 1, after the classified cyclone classification of raw ore, overflowing of classifying cyclone
In stream, the ore grain size mineral content less than 0.074mm is 48%, after high frequency vibrating fine screen classification, and sieve
In lower part, the ore grain size mineral content less than 0.074mm is 65%, and in sieve upper part, ore grain size is little
Mineral content in 0.074mm is 7%.After running 2 months continuously, after classified cyclone classification,
In the overflow of classifying cyclone, the ore grain size mineral content less than 0.074mm is 41%, through dither
After fine screening classification, lower part of screen divides the middle ore grain size mineral content less than 0.074mm to be 59%, sieves top
In point, the ore grain size mineral content less than 0.074mm is 12%.
By by the example of the present invention and carrying out contrasting it is found that use according to the comparative example of prior art
The ore-dressing technique of the grind grading of prior art carries out dividing of ore dressing, classifying cyclone and high frequency vibrating fine screen
Stage efficiency substantially reduced after a period of time.The ore-dressing technique using the grind grading of present invention offer is carried out
The classification efficiency of ore dressing, classifying cyclone and high frequency vibrating fine screen was basically unchanged after a period of time.Therefore,
According to the present invention it is possible to improve the efficiency of grind grading, eliminate light mineral coarse granule at grinding classification system
In Infinite Cyclic phenomenon, its production technology strong adaptability.
Although having been described for some embodiments of the present invention, it will be understood by those skilled in the art that not
In the case of disengaging is limited principle and the spirit of the present invention of its scope by claim and equivalent thereof, can
So that these embodiments are modified.
Claims (3)
1. an ore-dressing technique for grind grading, described ore-dressing technique comprises the following steps:
(1) raw ore be placed in classifying cyclone carry out classification, classified after, the sand setting of classifying cyclone
Enter ball mill to carry out ball milling and be then fed into classifying cyclone and proceed classification, the overflow of classifying cyclone
Enter high frequency vibrating fine screen and carry out further classification；
(2) overflow of classifying cyclone is after described high frequency vibrating fine screen carries out classification, and lower part of screen is divided into conjunction
Lattice grade, sieve upper part enters dewatering cyclone and is dehydrated；
(3), after sieve top lease making dewatering cyclone is dehydrated, step (1) is sent in the overflow of dewatering cyclone back to
In classifying cyclone proceed classification, the sand setting of dewatering cyclone is sent into ball mill and is carried out ball milling then
The classifying cyclone sent back in step (1) proceeds classification,
Wherein, control the Ore in described classifying cyclone and account for the weight percent of the ore pulp in classifying cyclone
The 55%～60% of ratio, controls the Ore in described high frequency vibrating fine screen and accounts for ore pulp in high frequency vibrating fine screen
The 30%～35% of percentage by weight, controls the Ore in described ball mill and accounts for the weight of the ore pulp in ball mill
The 70%～75% of percentage ratio,
Wherein, when the pulp density in ball mill higher than 75% time, the overflow of dewatering cyclone mainly as
When ball mill carries out ball milling, ore pulp adds water.
Ore-dressing technique the most according to claim 1, it is characterised in that in step (1), institute
Stating raw ore is the vanadium titano-magnetite strong magnetic gold mine after vanadium removal takes off titanium.
Ore-dressing technique the most according to claim 1, it is characterised in that in step (1), institute
Stating raw ore is the Ore being made up of coarse granule and fine grained obtained after sloping plate grading, and wherein, granularity is big
Ore in 0.1mm is coarse granule, and the granularity Ore less than 0.1mm is fine grained.
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| CN104492615A (en) * | 2014-10-31 | 2015-04-08 | 四川安宁铁钛股份有限公司 | Grinding classification method |
| CN108160312A (en) * | 2017-12-08 | 2018-06-15 | 南丹县南方有色金属有限责任公司 | A kind of granularity control technique during leached mud choosing silver |
| CN112892854B (en) * | 2020-12-24 | 2022-05-24 | 攀钢集团矿业有限公司 | Method for recycling ilmenite from tailings containing olivine or pyroxene vanadium titano-magnetite iron dressing |
| CN113019723B (en) * | 2021-03-29 | 2022-04-01 | 抚顺罕王傲牛矿业股份有限公司 | High-efficiency ore grinding and grading process for solving dehydration of products on high-frequency sieve |
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| DK12893A (en) * | 1993-02-04 | 1994-08-05 | Smidth & Co As F L | Process for producing normal as well as ultrafine cement |
| CN2797017Y (en) * | 2005-06-03 | 2006-07-19 | 傅雨成 | High position unloading type ore slurry extrusion dewatering machine |
| CN102059172A (en) * | 2010-11-11 | 2011-05-18 | 攀钢集团冶金工程技术有限公司 | Ore milling method for vanadium-titanium magnetite ore |
| CN102430468B (en) * | 2011-09-19 | 2013-04-17 | 鞍钢集团矿业公司 | Magnetism-gravity combined separation technology for magnetic hematite mixed type rough concentrate |
| CN102580843A (en) * | 2012-02-22 | 2012-07-18 | 攀钢集团矿业有限公司 | Mineral separation method for vanadium-titanium magnetite ores |
| CN102631984B (en) * | 2012-04-26 | 2013-07-10 | 鞍钢集团矿业公司 | Hematite roasting, stage grinding, intermediate magnetic separation, coarse and fine separation, gravity concentration-magnetic separation technique |
| CN103272694B (en) * | 2013-06-13 | 2016-03-02 | 鞍钢集团矿业公司 | Magnetic-gravity separation technology for Anshan type lean magnetite |
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