CN108499721A - A kind of classification-eddy flow-microbubble floatation column and technique for iron ore reverse flotation - Google Patents
A kind of classification-eddy flow-microbubble floatation column and technique for iron ore reverse flotation Download PDFInfo
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- CN108499721A CN108499721A CN201710111353.2A CN201710111353A CN108499721A CN 108499721 A CN108499721 A CN 108499721A CN 201710111353 A CN201710111353 A CN 201710111353A CN 108499721 A CN108499721 A CN 108499721A
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- Prior art keywords
- flotation
- stage flotation
- classification
- stage
- ore pulp
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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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- 238000005188 flotation Methods 0.000 title claims abstract description 114
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 113
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000012141 concentrate Substances 0.000 claims abstract description 27
- 238000000926 separation method Methods 0.000 claims abstract description 23
- 239000006260 foam Substances 0.000 claims abstract description 16
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 4
- 239000003814 drug Substances 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 239000010802 sludge Substances 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract description 2
- 239000004503 fine granule Substances 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 229910001608 iron mineral Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007667 floating Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Abstract
The invention discloses a kind of classification rotational flow microbubble flotation columns and technique for iron ore reverse flotation, including classification swirl-flow devices, stage flotation cylinder, circulating pump, feed distributor, foam collecting tank, annular inflatable tube, fixed support and tailings discharging mouth to constitute.Reverse floatation process is that raw ore slurry is graded swirl-flow devices and is divided into overflow (fine fraction ore pulp) and underflow (coarse fraction ore pulp), fine fraction ore pulp flows automatically to the top flotation of stage flotation cylinder, coarse fraction ore pulp is fed by circulating pump from stage flotation cylinder lower part tangent line, air forms microvesicle by annular inflatable tube and feeds stage flotation cylinder lower part, to realize the stage flotation up and down of the large or fine granule in same equipment, shorten technological process, avoid deterioration of the thin mud sludge to flotation environment, reduce thin mud in concentrate to carry secretly, improve concentrate grade, realize the efficient separation and industrial applications of microfine refractory iron ore.
Description
Technical field
The present invention relates to a kind of stage flotation equipment and techniques, especially a kind of classification-eddy flow-for iron ore reverse flotation
Microbubble floatation column and technique.
Background technology
Iron is most common metal in the world, and 95% or more is accounted in metal consumption total amount.And iron ore is steel and iron industry
Basic material and a country grand strategy resource.With China's rapid development of economy, the domestic demand to iron ore
It measures increasing, iron ore imports is caused to grow by a large margin every year, since 2003, China, which has been substituted Japan, became the world
First big iron ore imports state, 50% or so has been up to the degree of dependence of imported Fe ore.
Currently, China's iron ore deposit is developed and used by large-scale, on the one hand, the iron ore deposit easily selected is increasingly in short supply；
On the other hand, the deep production phase has been stepped on the bloodstone mountain of relatively good choosing mostly, and mining cost increases year by year.It is a large amount of poor thin red
Iron ore is not exploited also, although since washability difference causes ore dressing difficulty larger, it is contemplated that the severe country at present
Outer iron ore deposit form, it is imperative to the study on the industrialization of the poor fine iron ore in this part and exploitation to increase.
For the thinner iron mineral of disseminated grain size, especially micro-size fraction refractory iron ore, gravity treatment and magnetic method is all more difficult obtains
Good iron ore concentrate is obtained, at this moment just needs to apply floatation process.In existing method for floating, direct floatation process is caught due to iron mineral
Receive deficiency of the agent in selectivity so that concentrate grade and the lower determination of the rate of recovery；The reverse floatation process of iron ore is in certain journey
It is better than direct floatation process on degree, but since disseminated grain size is thinner, there is also argillizations, and serious, predictive desliming entrainment iron ore concentrate shows
As the shortcomings of serious and long flow path so that the efficiency of separation is poor.These all seriously constrain the industrialization development of thin bloodstone
And application.
Invention content
The object of the present invention is to provide a kind of classification-eddy flow-microbubble floatation column for iron ore reverse flotation, can be to iron
Mine carries out stage flotation in same equipment, long low with concentrate grade to solve sludge deterioration floatation process, flotation flowsheet
The problems such as, realize the efficient separation and industrial applications of microfine refractory iron ore.
A kind of classification-eddy flow-microbubble floatation column for iron ore reverse flotation provided by the invention include classification swirl-flow devices,
Stage flotation cylinder, feed distributor, foam collecting tank, annular inflatable tube, fixed support and tailings discharging mouth are constituted, classification rotation
It flows device and stage flotation cylinder upper side is mounted on by fixed support, feed distributor is mounted on inside stage flotation cylinder
Central upper position, foam collecting tank are mounted on stage flotation cylinder top, and tailings discharging mouth is mounted on stage flotation cylinder
Lowest part, annular inflatable tube are connected mounted on stage flotation cylinder lower part with the micropore foam maker in stage flotation cylinder.
Iron ore reverse floatation process using the classification-eddy flow-microbubble floatation column includes the following steps：Ore pulp and medicament are used
Agitator after mixing, is fed with pump in the classification swirl-flow devices of novel hierarchical-eddy flow-microbubble floatation column, ore pulp is graded
Swirl-flow devices are divided into overflow and underflow, and overflow feeds the feed distributor on stage flotation column top by pipeline self, and underflow is logical
It crosses circulating pump and squeezes into stage flotation column lower part from tangential inlet, air forms microvesicle by annular inflatable tube and feeds stage flotation column
Body lower part, fine fraction ore pulp carry out FLOTATION SEPARATION on stage flotation cylinder top, and coarse fraction ore pulp is in stage flotation cylinder lower part
Eddy flow-FLOTATION SEPARATION is carried out, bubble collides to form mineral laden bubble, continues to float to foam collecting tank with the hydrophobic granule in ore pulp
Middle discharge, the iron ore concentrate in ore pulp is discharged by the discharge gate of lower part, to realize classification-eddy flow-microvesicle of concentrate and tailings
FLOTATION SEPARATION.
Advantages of the present invention shows the following aspects：
1. the structure of the novel hierarchical-eddy flow-microbubble floatation column for being used for iron ore reverse flotation is simple, good separation effect, raising
The efficiency of separation of fine-particle minerals.
2. being equipped with classification swirl-flow devices for classification-eddy flow-microbubble floatation column of iron ore reverse flotation, pass through cyclone classification
Effect, can make raw ore be divided into coarse fraction and fine fraction two parts, feed top half and the lower half portion of flotation unit respectively, from
And less corruptions of the particulate sludge to flotation environment, improve the efficiency of separation of ore pulp.
3. for iron ore reverse flotation classification-eddy flow-microbubble floatation column can will classification flow and flotation flowsheet be attached to one
It rises, shortens technological process.
4. classification-eddy flow-microbubble floatation column of the present invention for iron ore reverse flotation can carry out raw ore to be classified-eddy flow-microvesicle
Flotation avoids fine grain tailing and is mixed into concentrate, and eddy flow enhances the salinity of difficult floating mineral, improves product essence
The grade of mine.
5. raw ore can be carried out being classified-eddy flow-microfoam flotation for classification-eddy flow-microbubble floatation column of iron ore reverse flotation,
Coarse grained concentrate is located at the lower half portion of floatation equipment, reduces iron ore concentrate and runs thick possibility, improves the rate of recovery of concentrate.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of classification-eddy flow-microbubble floatation column for iron ore reverse flotation
Fig. 2 is a kind of technological process apparatus contact figure of classification-eddy flow-microbubble floatation column for iron ore reverse flotation
In figure：1-classification swirl-flow devices, 2-stage flotation cylinders, 3-solid supports, 4-feed distributors, 5-bubbles
Foam collecting tank, 6-annular inflatable tubes, 7-tailings discharging mouths, 8-feed pumps, 9-agitators, 10-tangential inlets, 11-are followed
Ring pump, A-feed ore pulp, B-feed ore pulp, C-Grading Overflow, D-classification underflow, E-flotation froth, F-floatation underflow.
Specific implementation mode
Below according to the specific implementation example with reference of the present invention, the present invention will be further described.
As shown in Figure 1, a kind of novel high-frequency vibration bifurcated spiral chute includes classification swirl-flow devices 1, stage flotation cylinder
2, circulating pump 11, feed distributor 4, foam collecting tank 5, annular inflatable tube 6, fixed support 3 and tailings discharging mouth 7 are constituted, point
Grade swirl-flow devices 1 are mounted on 2 upper side of stage flotation cylinder by fixed support 3, be classified the Grading Overflow C of swirl-flow devices with to
Expect that distributor 1 is connected, the classification underflow D for being classified swirl-flow devices is connected with the entrance of circulating pump 11, the outlet and classification of circulating pump
The tangential inlet 10 of 2 lower part of flotation cylinder is connected, and feed distributor 4 is mounted on the central upper position of 2 the inside of stage flotation cylinder
It sets, foam collecting tank 5 is mounted on 2 top of stage flotation cylinder, and tailings discharging mouth 7 is mounted on the lowest part of stage flotation cylinder 2,
Annular inflatable tube 6 is mounted on stage flotation cylinder lower part, is connected with the micropore foam maker inside stage flotation cylinder 2.
Iron ore reverse floatation process using the classification-eddy flow-microbubble floatation column includes the following steps：
a:After mixing with agitator 9 by ore pulp and medicament, the classification of classification-eddy flow-microbubble floatation column is fed with feed pump 8
In swirl-flow devices 1.
b:Ore pulp B is graded swirl-flow devices 1 and divides for overflow C (fine fraction ore pulp) and underflow D (coarse fraction ore pulp).
c:Overflow C feeds the feed distributor 4 on stage flotation cylinder top by pipeline self, and underflow D is beaten by circulating pump 11
Enter the tangential inlet 10 of stage flotation cylinder lower part.
d:Air forms microvesicle after feeding micropore foam maker by annular inflatable tube 6, and microvesicle feeds 2 lower part of stage flotation cylinder.
e:Fine fraction ore pulp C carries out FLOTATION SEPARATION on stage flotation cylinder top, and coarse fraction ore pulp D is in stage flotation cylinder lower part
Carry out eddy flow-FLOTATION SEPARATION.
f:Hydrophobic granule in bubble and ore pulp collides to form mineral laden bubble, continues to float in foam collecting tank 5 and is discharged, ore pulp
In iron ore concentrate be discharged by the tailing discharge gate 7 of lower part, to realize the stage flotation separation of ore pulp, obtain concentrate F and tail
Mine E.
The principle of the present invention is：
The present invention is acted on classification swirl-flow devices 1 by cyclonic separation is divided into overflow C (fine fraction ore pulp) and underflow D by ore pulp
(coarse fraction ore pulp), the concentrate in iron ore is iron mineral, and tailing is mainly the gangue minerals such as quartz, and underflow D is mainly after classification
Iron mineral, overflow C are mainly quartz mineral, that is, being classified swirl-flow devices 1 realizes the classification and desliming of ore pulp, fine fraction ore pulp C
It feeds stage flotation cylinder top and carries out FLOTATION SEPARATION, coarse fraction ore pulp D squeezes into stage flotation cylinder lower part by circulating pump 11
Eddy flow-FLOTATION SEPARATION is carried out, eddy flow-flotation can strengthen the salinity of difficult flotation gangue mineral, and gangue mineral is lighter, with
Microvesicle is easier to enter froth bed discharge after combining, and is mixed into probability in iron ore concentrate to reduce, improves the grade of iron ore concentrate
And the rate of recovery, the gangue mineral in microvesicle and ore pulp collide to form mineral laden bubble, continue to float in foam collecting tank 5 and are discharged,
Iron ore concentrate in ore pulp is discharged by the tailing discharge gate 7 of lower part, and classification-eddy flow-microvesicle to realize concentrate and tailings is floating
Choosing separation.
The flotation column of the present invention is suitable for the flotation of particulate iron ore composition granule, by taking bloodstone as an example, currently, most common red
Iron ore reverse flotation column floatation equipment is pneumo type flotation column, flotation column of the invention and current most common pneumo type flotation column
Floatation indicators are compared, and the efficiency of separation can be improved 3.35%~5.24%, significant effect, here be flotation column using the present invention with
Several groups of contrast tests of hematite flotation separation are carried out using most common pneumo type flotation column at present.
Example 1：The flotation column reverse flotation Dai County bloodstone of the present invention passes through under conditions of raw ore Iron grade 34.53%
One roughing (reverse flotation) can get the crude iron concentrate that grade is 48.48%, and iron recovery can reach 65.31%, with identical item
It is compared with the separation index of air flotation column under part, the grade of iron ore concentrate improves 5.25%, and the rate of recovery improves 3.30%, phase
It closes flotation experimental results and is shown in Table 1.
Table 1 roughing of Gongchangling Tails bloodstone (reverse flotation) comparative test result
Example 2：The flotation column reverse flotation Yunnan bloodstone of the present invention carries out essence to the rough concentrate after one roughing
It is elected to be industry.Under conditions of Iron grade 50.02% or so of rough concentrate, can get grade by primary cleaning (reverse flotation) is
61.25 iron ore concentrate, iron recovery can reach 57.82%, be compared with the separation index of air flotation column is used under the same terms, iron
The grade of concentrate improves 2.13%, and the rate of recovery improves 3.05%, and related float test, related flotation experimental results are shown in Table 1.
2 selected (reverse flotation) comparative test result of Quanjiao County flood mountain bloodstone of table
Claims (5)
1. a kind of classification-eddy flow-microbubble floatation column for iron ore reverse flotation, including classification swirl-flow devices, stage flotation cylinder,
Circulating pump, feed distributor, foam collecting tank, annular inflatable tube, fixed support and tailings discharging mouth are constituted, and are classified swirl-flow devices
It is mounted on stage flotation cylinder upper side by fixed support, feed distributor is mounted on the center inside stage flotation cylinder
Portion position, foam collecting tank are mounted on stage flotation cylinder top, and tailings discharging mouth is mounted on the lowest part of stage flotation cylinder,
Annular inflatable tube be mounted on stage flotation cylinder lower part, pump entry and outlet respectively be classified swirl-flow devices underflow opening and
The tangential inlet of stage flotation cylinder lower part is connected.
2. a kind of classification-eddy flow-microvesicle stage flotation column for iron ore reverse flotation according to claim 1, feature
It is：Altogether equipped with classification swirl-flow devices and a stage flotation cylinder.
3. a kind of classification-eddy flow-microvesicle stage flotation column for iron ore reverse flotation according to claim 1, feature
It is：Dress there are one circulating pump, pump entry and outlet respectively with the underflow opening and stage flotation cylinder that are classified swirl-flow devices
The tangential inlet of lower part is connected.
4. a kind of classification-eddy flow-microvesicle stage flotation column for iron ore reverse flotation according to claim 1, feature
It is：The overflow of classification swirl-flow devices is connected with the feed distributor on flotation cylinder top, is classified the underflow of swirl-flow devices and floats
The feeding mouth of cylinder lower part is selected to be connected.
5. a kind of iron ore reverse floatation process of the equipment as described in requiring right 1, it is characterised in that include the following steps：
a:After mixing with agitator 9 by ore pulp and medicament, novel hierarchical-eddy flow-microbubble floatation column is fed with feed pump 8
It is classified in swirl-flow devices 1.
b:Ore pulp B is graded swirl-flow devices 1 and divides for overflow C (fine fraction ore pulp) and underflow D (coarse fraction ore pulp).
c:Overflow C feeds the feed distributor 4 on stage flotation cylinder top by pipeline self, and underflow D is beaten by circulating pump 11
Enter the tangential inlet 10 of stage flotation cylinder lower part.
d:Air forms microvesicle after feeding micropore foam maker by annular inflatable tube 6, and microvesicle feeds 2 lower part of stage flotation cylinder.
e:Fine fraction ore pulp C carries out FLOTATION SEPARATION on stage flotation cylinder top, and coarse fraction ore pulp D is in stage flotation cylinder lower part
Carry out eddy flow-FLOTATION SEPARATION.
f:Hydrophobic granule in bubble and ore pulp collides to form mineral laden bubble, continues to float in foam collecting tank 5 and is discharged, ore pulp
In iron ore concentrate be discharged by the tailing discharge gate 7 of lower part, to realize the stage flotation separation of ore pulp, obtain concentrate F and tail
Mine E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710111353.2A CN108499721A (en) | 2017-02-28 | 2017-02-28 | A kind of classification-eddy flow-microbubble floatation column and technique for iron ore reverse flotation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710111353.2A CN108499721A (en) | 2017-02-28 | 2017-02-28 | A kind of classification-eddy flow-microbubble floatation column and technique for iron ore reverse flotation |
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| Publication Number | Publication Date |
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| CN108499721A true CN108499721A (en) | 2018-09-07 |
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|---|---|---|---|
| CN201710111353.2A Pending CN108499721A (en) | 2017-02-28 | 2017-02-28 | A kind of classification-eddy flow-microbubble floatation column and technique for iron ore reverse flotation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020155421A1 (en) * | 2019-01-31 | 2020-08-06 | 中国矿业大学 | Column sorting apparatus and method for mineralization-floatation separation |
| CN112934482A (en) * | 2021-03-16 | 2021-06-11 | 中国恩菲工程技术有限公司 | Flotation method and flotation device |
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