CN106824517A - A kind of dry type Pre-sorting method of ferromagnetism weak magnetic mixed type iron ore - Google Patents
A kind of dry type Pre-sorting method of ferromagnetism weak magnetic mixed type iron ore Download PDFInfo
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- CN106824517A CN106824517A CN201611194228.4A CN201611194228A CN106824517A CN 106824517 A CN106824517 A CN 106824517A CN 201611194228 A CN201611194228 A CN 201611194228A CN 106824517 A CN106824517 A CN 106824517A
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- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
Abstract
The present invention proposes a kind of dry type Pre-sorting method of ferromagnetism weak magnetic mixed type iron ore, including step：1) ferromagnetism weak magnetic mixed type iron ore feeds updraft type combination dry-dressing machine (or magnetic anomaly step separate dry-dressing machine), and strongly magnetic mineral is obtained using updraft type combination dry separation operation, and the updraft type combines dry separation, is main to select band and the combination dry separation of campaigning band；2) step 1) obtain magnetic tailing again by high magnetic force high magnetic separation separate weakly magnetic mineral and gangue, so as to realize mixed type iron ore multistage magnetic anomaly walk sorting.The ferromagnetism weak magnetic mixed type iron ore dry type pre-selection method that the present invention is provided, technological process is short, Process configuration is simply compact, and the efficiency of separation is high.The useless rate of throwing greatly improved, reduces tailings grade, improve concentrate grade, reduce the beneficiation costs such as equipment operation, mineral aggregate transport, abrasion, effectively reduce metal loss.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to a kind of beneficiation method of utilization magnetic force.
Background technology
" can throw early throwing, can receive early receipts " is one of basic principle of ore dressing, to realize the production of efficient energy-saving.Dry type is divided in advance
The index of choosing directly influences the economic interests in ore dressing plant, especially mining industry integral form is weak in recent years, ore price be in it is low
In position period, how as much as possible to reduce production cost is the key for concerning Business survival.
Contain ferromagnetism valuable mineral and weak magnetic valuable mineral in ferromagnetism-weak magnetic mixed type iron ore simultaneously.With vanadium
As a example by titanomagnetite, its ilmenite for containing ferromagnetic magnetic iron ore and weak magnetic simultaneously.Panxi Diqu is China's v-ti magnetite
The Main Metallogenic band of ore deposit, is also one of the important producing region in similar mineral deposit in the world.Iron, the titanium of current Panxi Diqu vanadium titano-magnetite
Content is integrally relatively low, throws ahead of time except qualified tailings, improves and seem into mill grade and be even more important.The traditional of scene use at present does
Select technological process with configuration as shown in figure 1, the method includes：Raw ore through Belt Conveying by after broken and screening, passing through first
Ferromagnetic magnetic iron ore is reclaimed in the roughing of weak magnetic magnet drum, and thick magnetic tail mineral products then feed middle magnetic magnet drum and scan further recovery by force
Magnetic mineral, last middle magnetic tail ore deposit carries out weak magnetic recovery by strong magnetic magnet drum again.The method is mainly using conventional magnetic rolling
Cylinder carries out dry separation to the raw ore after in small, broken bits and throws tail, and the concentrate of weak magnetic-middle magnetic-strong three sections of sortings of magnetic merge into bulk concentrate and enter wet
Formula pre-selecting before grinding system, strong magnetic tail ore deposit is then lost as true tailings.But because conventional magnet drum equipment sorts ore deposit efficiency in small, broken bits
Difference, cause smart tail separate it is unclear, be mingled with it is serious, throw that tail amount is low, concentrate increase rate is small, tailings grade is higher, technological process is matched somebody with somebody
Put complicated and index and be difficult the problems such as adjusting.
The content of the invention
For the weak point that this area is present, it is an object of the invention to provide a kind of ferromagnetism-weak magnetic mixed type
The dry type Pre-sorting method of iron ore, to ferromagnetism-weak magnetic mixed type iron ore using " updraft type combines the strong magnetic of dry separation+high magnetic force
Choosing " technological process magnetic separation.
The technical scheme for realizing the object of the invention is：
A kind of dry type Pre-sorting method of ferromagnetism-weak magnetic mixed type iron ore, including step：
1) ferromagnetism-weak magnetic mixed type iron ore feeds updraft type combination dry-dressing machine (or magnetic anomaly step separates dry-dressing machine), profit
Combine dry separation with updraft type and operate and obtain strongly magnetic mineral, the updraft type combines dry separation, be updraft type combine dry-dressing machine (or
Magnetic anomaly step separates dry-dressing machine) in set it is main select band and campaigning band, main choosing band is located at campaigning band top, the ferromagnetism-weak magnetic for feeding
Property mixed type iron ore falls on campaigning belt leather band；Main choosing sets magnet drum, in main choosing band with magnetically attractive system in interior setting in campaigning band
The magnetic field intensity of upper magnetically attractive system is 400~2000 oersteds, in campaigning band the magnetic field intensity of magnet drum be 2500~5000 it is difficult to understand this
It is special；It is main to select band and the combination dry separation of campaigning band；
It is described main to select band and the asynchronous traveling of campaigning band：The main belt speed for selecting band is 2.5~4.0m/s, campaigning band
Belt speed is 1.5~3.0m/s；
2) step 1) obtain magnetic tailing again by high magnetic force high magnetic separation separate weakly magnetic mineral and gangue.Wherein,
The magnetic field intensity of the high magnetic force high magnetic separation is 6000~10000 oersteds, and magnet drum speed-frequency is 20~50Hz.
Step 1) separate inferior fine magnetite concentrate with by step 2) the separate high intensity magnetic mineral of the strong magnetic treatment of high magnetic force mixes, entrance
Wet type pre-selecting before grinding system is directly entered mill and selects system, step 2) separate gangue mineral abandons as true tailings, so that
Realize the multistage magnetic anomaly step sorting of mixed type iron ore.
The present invention suitable for dry separation is in small, broken bits or high pressure roller mill after the sorting of mixed type iron ore, such as magnetic iron ore or other are strong
Magnetic mineral and weak magnetic mineral composite ore, separation, sorting including bloodstone, ilmenite, speculum iron, garnet etc. etc..
Wherein, the ferromagnetism-weak magnetic mixed type iron ore crushes the raw ore in small, broken bits for particle diameter≤25mm, then feeds magnetic
Asynchronous separation dry-dressing machine.
Preferably, the ferromagnetism-weak magnetic mixed type iron ore crushes the raw ore in small, broken bits for particle diameter≤12mm.
Magnet drum is set to prior art in campaigning band, and usual magnet drum is arranged on belt discharge end.
Preferably, step 1) in, the main belt speed for selecting band is 2.8~3.2m/s；The belt speed of campaigning band is
1.8~2.5m/s.
It is further preferred that the main magnetic field intensity for selecting band is 500~1000 oersteds, the magnetic field intensity of campaigning band is 3000
~4000 oersteds.
The field intensity of the magnetic separation refers to the average field strength for acting on sorting ore surface.
The beneficial effects of the present invention are：
By being found after research and experiment, by using, " updraft type combines the strong magnetic of dry separation+high magnetic force to the present inventor
Choosing " technological process configuration, on the one hand can substitute the three sections of magnet drums or even follow-up wet type pre-selecting system in traditional dry separation craft,
Simplification of flowsheet, save space configuration；On the other hand dry separation can be made to throw useless rate greatly improve, concentrate grade is higher, mine tailing
Grade is lower, dry separation efficiency is improved, so as to complete the present invention.
The invention provides a kind of dry type Pre-sorting method of high intensity magnetic separation-weak magnetic mixed type iron ore, the method includes：Adopt
Configured with " updraft type combines dry separation+high magnetic force high intensity magnetic separation " technological process, the raw ore in small, broken bits of ferromagnetism-weak magnetic mixed type iron ore
Percutaneous band feeds updraft type combination dry-dressing machine (or magnetic anomaly step separates dry-dressing machine) first, is obtained using updraft type combination dry separation technology
Strongly magnetic mineral, and then weakly magnetic mineral and gangue are separated by high magnetic force high magnetic separation, so as to realize many of mixed type iron ore
Level magnetic anomaly step sorting.
Ferromagnetism-weak magnetic mixed type iron ore dry type pre-selection method that the present invention is provided, technological process is short, Process configuration is simple
Single compact, the efficiency of separation is high.The useless rate of throwing greatly improved, reduces tailings grade, improve concentrate grade, reduce equipment fortune
The beneficiation costs such as row, mineral aggregate transport, abrasion, effectively reduce metal loss.
Brief description of the drawings
Fig. 1 is the technique stream of the conventional magnet drum method dry type Pre-sorting ferromagnetism-weak magnetic mixed type iron ore of prior art
Cheng Tu.
Fig. 2 is the process chart of ferromagnetism-weak magnetic mixed type iron ore dry type Pre-sorting that the present invention is provided.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.
Those skilled in the art are it is to be understood that following examples are merely to illustrate the present invention, but are not limited to the present invention
Scope.
Unless otherwise instructed, the technological means that the means for being used in embodiment are well known to those skilled in the art.
In embodiment, the strong magnetomechanical of high magnetic force is that the model RTG series that BGRIMM Electrical Technology Co., Ltd. develops is high
Magnetic force strong magnetic dry separator.
The model CT series magnet drums that conventional weak magnetic magnet drum in comparative example is developed for Beijing Mine and Metallurgy General Inst.Often
Magnetic magnet drum and strong magnetic magnet drum are purchased from the model YG series magnet drums of Anshan, liaoning Province magnetic separator manufacturer in rule.
Embodiment 1：
The present embodiment is used to illustrate the ferromagnetism-weak magnetic mixed type iron ore dry type Pre-sorting method of present invention offer, tool
Body ground is the dry type Pre-sorting method of vanadium titano-magnetite.As shown in Fig. 2 it includes step：
1) ferromagnetism-weak magnetic mixed type iron ore feeds updraft type combination dry-dressing machine (or magnetic anomaly step separates dry-dressing machine), profit
Combine dry separation with updraft type and operate and obtain strongly magnetic mineral, the updraft type combines dry separation, be updraft type combine dry-dressing machine (or
Magnetic anomaly step separates dry-dressing machine) in set it is main select band and campaigning band, main choosing band is located at campaigning band top, the ferromagnetism-weak magnetic for feeding
Property mixed type iron ore falls on campaigning belt leather band；Main choosing sets magnet drum with magnetically attractive system in interior setting in campaigning band, main choosing band and
Campaigning band combines dry separation；
2) step 1) obtain magnetic tailing again by high magnetic force high magnetic separation separate weakly magnetic mineral and gangue, so as to realize
The multistage magnetic anomaly step sorting of mixed type iron ore.
Concrete technology is：The vanadium titano-magnetite of granularity≤12mm after crushing and screening is fed into updraft type combination through drain hopper to do
Machine is selected to be sorted, it is 3.2m/s to set the main choosing for inhaling combination dry-dressing machine with belt speed, and campaigning band belt speed is 2.1m/s, main choosing band
The oersted of magnetic field intensity 800, the oersted of magnetic field intensity 3500 of campaigning band.After through upper suction combined type dry separation technical finesse, obtain
To inferior fine magnetite concentrate (i.e. ferromagnetism magnetic iron ore) and weakly magnetic tailingses (i.e. weak magnetic ilmenite and gangue).Wherein inferior fine magnetite concentrate with it is follow-up
The high intensity magnetic mineral for obtaining is mixed into follow-up mill and selects system further to select iron, select titanium, and the weakly magnetic tailingses of acquisition then enter high magnetic force
Strong magnetic treatment.
The weak magnetic ilmenite and gangue that low intensity magnetic separation is obtained are processed into the strong magnetomechanical of high magnetic force in the lump.Setting high magnetic force
The magnetic field intensity of strong magnetomechanical is 7000 oersteds, and drum speed frequency is 40Hz.By after the strong magnetomechanical treatment of high magnetic force, obtaining strong
Magnetic concentrate (i.e. weak magnetic ilmenite) and strong magnetic tail ore deposit (i.e. gangue).Wherein, high intensity magnetic mineral is merged into the inferior fine magnetite concentrate of leading portion
It is bulk concentrate, strong magnetic tail ore deposit is then abandoned as true tailings.
Bulk concentrate and the TFe and TiO of true tailings and raw ore that embodiment is obtained2Grade and the useless rate of throwing are shown in Table 1.
Embodiment 2：
The dry type Pre-sorting method of vanadium titano-magnetite, step is with embodiment 1, concrete technology：
The vanadium titano-magnetite of granularity≤12mm after crushing and screening is fed into updraft type combination dry-dressing machine through haul belt is carried out
Sorting, it is 3.5m/s to set the main choosing for inhaling combination dry-dressing machine with belt speed, and campaigning band belt speed is 2.5m/s, and the magnetic field of main choosing band is strong
Spend 800 oersteds, the oersted of magnetic field intensity 3500 of campaigning band.
The weak magnetic ilmenite and gangue that low intensity magnetic separation is obtained are processed into the strong magnetomechanical of high magnetic force in the lump.Setting high magnetic force
The magnetic field intensity of strong magnetomechanical is 7000 oersteds, and drum speed frequency is 50Hz.By after the strong magnetomechanical treatment of high magnetic force, obtaining strong
Magnetic concentrate (i.e. weak magnetic ilmenite) and strong magnetic tail ore deposit (i.e. gangue).High intensity magnetic mineral merges as mixing with the inferior fine magnetite concentrate of leading portion
Concentrate enters wet type pre-selecting before grinding system, and strong magnetic tail ore deposit is then abandoned as true tailings.
The bulk concentrate and true tailings of acquisition and the TFe and TiO of raw ore2Grade and the useless rate of throwing are shown in Table 1.
Embodiment 3：
The dry type Pre-sorting method of vanadium titano-magnetite, step is with embodiment 1, concrete technology：
The vanadium titano-magnetite of granularity≤12mm after crushing and screening is fed into updraft type combination dry-dressing machine through haul belt is carried out
Sorting, it is 3.0m/s to set the main choosing for inhaling combination dry-dressing machine with belt speed, and campaigning band belt speed is 1.8m/s, and the magnetic field of main choosing band is strong
Spend 800 oersteds, the oersted of magnetic field intensity 3500 of campaigning band.
The weak magnetic ilmenite and gangue that low intensity magnetic separation is obtained are processed into the strong magnetomechanical of high magnetic force in the lump.Setting high magnetic force
The magnetic field intensity of strong magnetomechanical is 7000 oersteds, and drum speed frequency is 30Hz.By after the strong magnetomechanical treatment of high magnetic force, obtaining strong
Magnetic concentrate (i.e. weak magnetic ilmenite) and strong magnetic tail ore deposit (i.e. gangue).High intensity magnetic mineral merges as mixing with the inferior fine magnetite concentrate of leading portion
Concentrate enters wet type pre-selecting before grinding system, and strong magnetic tail ore deposit is then abandoned as true tailings.
The bulk concentrate and true tailings of acquisition and the TFe and TiO of raw ore2Grade and the useless rate of throwing are shown in Table 1.
Comparative example 1
As shown in figure 1, wherein the magnetic field intensity of first step weak magnetic is 2500 oersteds, the magnetic field intensity of magnetic is in second step
6000 oersteds, the magnetic field intensity of strong magnetic is 8000 oersteds.
The vanadium titano-magnetite of granularity≤12mm after crushing and screening is fed into weak magnetic magnet drum through haul belt, inferior fine magnetite concentrate with
Magnetic, high intensity magnetic mineral merge into bulk concentrate in follow-up, and weakly magnetic tailingses product then feeds middle magnetic magnet drum；Middle magnetic concentrate and weak magnetic,
High intensity magnetic mineral merges into bulk concentrate, and middle magnetic tail mineral products then feed strong magnetic magnet drum；High intensity magnetic mineral and weak magnetic, middle magnetic above
Concentrate merges into bulk concentrate, and strong magnetic tail mineral products are then abandoned as true tailings.Bulk concentrate that comparative example is obtained and final
The TFe and TiO of mine tailing and raw ore2Grade and the useless rate of throwing are shown in Table 1.
Table 1：Bulk concentrate and true tailings grade and the useless rate of throwing
In table 1, full iron (Total Fe, TFe) grade, refers to percentage by weights of the TFe in mineral.
TiO2Grade refers to TiO2Percentage by weight in mineral.
It refers to the percentage by weight that true tailings (gangue) amount accounts for raw ore amount (mine-supplying quantity) to throw useless rate.
From table 1, the method for the ferromagnetism-weak magnetic mixed type iron ore dry type Pre-sorting provided using the present invention, its
Embodiment is compared with comparative example, and Process configuration is shorter, and the bulk concentrate iron that obtains, titanium grade are higher, true tailings iron, titanium grade
It is lower, to throw useless rate and greatly improve, the equipment efficiency of separation for using is high, so reducing energy consumption, improves economic benefit.
By taking certain ore dressing plant of the red lattice area of Panzhihua as an example, current 3,400,000 tons of the factory year treatment raw ore amount produces Iron concentrate 73 per year
Ten thousand tons, 180,000 tons of titanium fine powder, using the method for the present invention, compared to the traditional operation that comparative example is represented, what is obtained after treatment is mixed
Iron grade adds up average 3 percentage points of raising, accumulative average 1.2 percentage points of the raising of titanium grade in closing concentrate, and energy consumption is selected in mill
In the case of constant, 9.7 ten thousand tons of Iron concentrate year volume increase, 2.5 ten thousand tons of titanium fine powder year volume increase, volume increase about 14%, economic benefit and ring
Protect remarkable benefit.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited in above-mentioned implementation method
Detail, in range of the technology design of the invention, various simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
Claims (6)
1. the dry type Pre-sorting method of a kind of ferromagnetism-weak magnetic mixed type iron ore, it is characterised in that including step：
1) ferromagnetism-weak magnetic mixed type iron ore feeds updraft type combination dry-dressing machine, is obtained using updraft type combination dry separation operation
Strongly magnetic mineral, the updraft type combines dry separation, is to set main to select band and campaigning band, main choosing band in updraft type combination dry-dressing machine
Positioned at campaigning band top, the ferromagnetism for feeding-weak magnetic mixed type iron ore falls on campaigning belt leather band；Main choosing is with suction in interior setting
Magnet drum is set in magnetic system, campaigning band, and magnetic field intensity of the main choosing with interior upper magnetically attractive system is 400~2000 oersteds, in campaigning band
The magnetic field intensity of magnet drum is 2500~5000 oersteds；The main belt speed for selecting band is 2.5~4.0m/s, campaigning band
Belt speed is 1.5~3.0m/s；It is main to select band and the combination dry separation of campaigning band；
2) step 1) obtain magnetic tailing again by high magnetic force high magnetic separation separate weakly magnetic mineral and gangue；Wherein, it is described
The magnetic field intensity of high magnetic force high magnetic separation is 6000~10000 oersteds；
Step 1) separate inferior fine magnetite concentrate with by step 2) the separate high intensity magnetic mineral of the strong magnetic treatment of high magnetic force mixes, into wet type
Pre-selecting before grinding system is directly entered mill and selects system, step 2) separate gangue mineral abandons as true tailings, so as to realize
The multistage magnetic anomaly step sorting of mixed type iron ore.
2. the dry type Pre-sorting method of ferromagnetism-weak magnetic mixed type iron ore according to claim 1, it is characterised in that institute
It is the raw ore in small, broken bits of particle diameter≤25mm to state ferromagnetism-weak magnetic mixed type iron ore crushing, then feeds updraft type combination dry-dressing machine.
3. the dry type Pre-sorting method of ferromagnetism-weak magnetic mixed type iron ore according to claim 2, it is characterised in that institute
It is the raw ore in small, broken bits of particle diameter≤12mm to state ferromagnetism-weak magnetic mixed type iron ore crushing.
4. the dry type Pre-sorting method of ferromagnetism-weak magnetic mixed type iron ore according to claim 1, it is characterised in that institute
It is 2.8~3.2m/s to state the main belt speed for selecting band；The belt speed of campaigning band is 1.8~2.5m/s.
5. the dry type Pre-sorting method of ferromagnetism-weak magnetic mixed type iron ore according to claim 1, it is characterised in that main
The magnetic field intensity of band is selected for 500~1000 oersteds, the magnetic field intensity of campaigning band is 3000~4000 oersteds.
6. according to any one of Claims 1 to 5 ferromagnetism-weak magnetic mixed type iron ore dry type Pre-sorting method, it is special
Levy and be, step 2) described in high magnetic force high magnetic separation using magnet drum formula magnetic plant, the magnet drum of the magnetic plant
Speed-frequency is 20~50Hz.
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Cited By (5)
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| CN107377199A (en) * | 2017-08-21 | 2017-11-24 | 安徽金日盛矿业有限责任公司 | A kind of pre-selection technique of magnetic iron ore and speculum iron composite ore |
| CN107737668A (en) * | 2017-11-10 | 2018-02-27 | 山西双良国环科技有限公司 | A kind of multiple stage circulation magnetic separating method |
| CN109013055A (en) * | 2018-09-29 | 2018-12-18 | 辽宁科技大学 | Dry-type magnetic extractor and its method for separating is sucked in a kind of crawler belt ore discharge |
| CN114072235A (en) * | 2019-07-03 | 2022-02-18 | 福特斯丘金属集团 | Method for concentrating an iron ore stream |
| CN114405675A (en) * | 2021-12-31 | 2022-04-29 | 玉溪大红山矿业有限公司 | Ore dressing process for iron ore mixed ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107377199A (en) * | 2017-08-21 | 2017-11-24 | 安徽金日盛矿业有限责任公司 | A kind of pre-selection technique of magnetic iron ore and speculum iron composite ore |
| CN107737668A (en) * | 2017-11-10 | 2018-02-27 | 山西双良国环科技有限公司 | A kind of multiple stage circulation magnetic separating method |
| CN109013055A (en) * | 2018-09-29 | 2018-12-18 | 辽宁科技大学 | Dry-type magnetic extractor and its method for separating is sucked in a kind of crawler belt ore discharge |
| CN114072235A (en) * | 2019-07-03 | 2022-02-18 | 福特斯丘金属集团 | Method for concentrating an iron ore stream |
| CN114405675A (en) * | 2021-12-31 | 2022-04-29 | 玉溪大红山矿业有限公司 | Ore dressing process for iron ore mixed ore |
| CN114405675B (en) * | 2021-12-31 | 2023-05-16 | 玉溪大红山矿业有限公司 | Mineral separation process for iron ore mixed ore |
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Application publication date: 20170613 |