CN102824960A - Gravity and magnetic separation process with two segments of flat slag removing screens - Google Patents
Gravity and magnetic separation process with two segments of flat slag removing screens Download PDFInfo
- Publication number
- CN102824960A CN102824960A CN201210347353XA CN201210347353A CN102824960A CN 102824960 A CN102824960 A CN 102824960A CN 201210347353X A CN201210347353X A CN 201210347353XA CN 201210347353 A CN201210347353 A CN 201210347353A CN 102824960 A CN102824960 A CN 102824960A
- Authority
- CN
- China
- Prior art keywords
- screen
- flat
- magnetic
- removes
- ballast
- Prior art date
- 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.)
- Granted
Links
Images
Abstract
The invention belongs to a gravity and magnetic separation process with two segments of flat slag removing screens, comprising the following steps of: primary coarse/fine classification operation, gravity separation, magnetic separation and screening, wherein undersize products of a vibration screen are concentrates, tailings of a coarse screw are fed into a slag removing screen, undersize products of the slag removing screen are fed into a weak magnet separator and a medium sweeping magnet, concentrates of the medium sweeping magnet, tailings of a fine screw, oversize products of the slag removing screen and oversize products of the vibration screen are fed for secondary classification operation, settled sand obtained through the secondary classification operation is fed for secondary ball-milling, and on-screen products and concentrations with discharged ore particle sizes obtained through the secondary ball-milling and with overflow particle sizes obtained through secondary classification are returned for coarse and fine classification operation. The gravity and magnetic separation process is characterized in that the used slag removing screens are flat slag removing screens and one flat slag removing screen is arranged between the weak magnet separator and medium sweeping magnet. The gravity and magnetic separation process has the advantages that the flat slag removing screens are additionally arranged before the separation of a magnetic separator, so that a great deal of slag in ore pulp can be filtered out, the blockage of a medium box of a medium intensity magnetic separator is reduced, the service period of the medium intensity magnetic separator is prolonged, the slag removing effect and the screening efficiency are effectively improved.
Description
Technical field
The invention belongs to the preparation equipment technical field, relate in particular to a kind of other technology of heavily magnetic separation of removing ballast screen with two sections flat boards.
Background technology
1) adopts stage grinding-thickness grading, gravity treatment-magnetic separation-anion reverse floatation joint process usually at rhombohedral iron ore beneficiation technics.The cyclone sand setting that is a thickness grading operation in the heavy other technological process of magnetic separation wherein feeds thick spiral shell; The concentrate of thick spiral shell is given smart spiral shell; The concentrate product of smart spiral shell feeds vibratory sieve and sieves, and its undersize is a concentrate, and the mine tailing of thick spiral shell feeds cylinder and removes ballast screen; The undersize that cylinder removes ballast screen feeds weak magnetic machine; Magnetic machine during weak magnetic tail ore deposit feeds, weak magnetic machine concentrate, middle magnetic machine concentrate, smart spiral shell mine tailing, cylinder remove the oversize of ballast screen and the oversize of vibratory sieve together feeds the secondary graded operation, and the sand setting of secondary graded operation feeds secondary ball milling; It is 60～65% to return thickness grading together that the ore discharge granularity of secondary ball milling (200 order) accounts for more than 60% overflow granularity (200 order) with the secondary graded operation, and tail is thrown as true tailings in middle magnetic tail ore deposit.Wherein middle magnetic machine operation generally adopts magnetic machine in the upright ring pulsating high gradient, because this magnetic separator is good to weak magnetic mineral recovering effect, the rate of recovery is high, and fault rate is low, and characteristics such as working stability are used in particular for handling the recovery operation of gravity tailings.Its technological process is illustrated in fig. 1 shown below.
In production application; Because the gravity tailings granularity is thicker, granularity (200 order) 30%～35% can not screen out coarse granule and impurity substances in the ore pulp fully because original cylinder removes ballast screen; Magnetic machine cartridge obstruction accident takes place again and again in causing; The wherein middle magnetic machine cartridge cleaning frequency is 2 months, need dismantle cleaning through manual type, and labour intensity is big.And in the drum sieve running, because the drum sieve sheet is damaged easily, make the part clinker get into magnetic separator, appearance not only increases the frequency of changing the drum sieve screen cloth, but also influences screening efficiency, especially influences the upkeep operation time, reduces equipment operation rate.Drum sieve adopts the automatic discharge mode mineral that the part granularity is qualified to take out of simultaneously, causes the entering secondary ball milling overground.
2) at present existing dull and stereotyped slagging-off screen device, its primary structure is according to Structure of Vibrating Screen system, mainly by screen frame, sieve sheet, feed launder, unload mineral water Guan Sida parts and form, wherein unload the mineral water pipe and be evenly distributed on the compass screen surface.Because produced on-site process mine-supplying quantity is bigger; Feeding the dull and stereotyped ore pulp that removes ballast screen usually flashes; What original flat board removed ballast screen unloads mineral water impulsive force poor effect, usually have ore pulp to be bonded on the compass screen surface, and former flat screen does not have special for slag chute; Cause a large amount of residues to flow into the hypomere operation, influence sorting result.Its device configurations is as shown in Figure 2
Summary of the invention
Order of the present invention provides a kind of with the heavily magnetic separation other technology of two sections flat boards except that ballast screen, through setting up the dull and stereotyped ballast screen that removes before the magnetic in sweeping, can a large amount of slags in the ore pulp be filtered out, and the middle magnetic machine cartridge that effectively prevents stops up, and has improved screening efficiency.
The objective of the invention is to realize through following technical proposals:
Of the present invention with the heavily magnetic separation other technology of two sections flat boards, of the present invention with the other technology of heavily magnetic separation of two sections flat boards except that ballast screen except that ballast screen, comprise that the sand setting of the cyclone of a thickness grading operation feeds thick spiral shell; The concentrate of thick spiral shell is given smart spiral shell; The concentrate product of smart spiral shell feeds vibratory sieve and sieves, and the undersize of its vibratory sieve is a concentrate, and the mine tailing of thick spiral shell feeds except that ballast screen; The undersize that removes ballast screen feeds weak magnetic machine and sweeps middle magnetic; Tail is thrown as true tailings in the magnetic tail ore deposit in sweeping, and the mine tailing of the concentrate of magnetic, smart spiral shell, the oversize that removes ballast screen and the oversize of vibratory sieve together feed the secondary graded operation in sweeping, and the sand setting of secondary graded operation feeds secondary ball milling;-200 orders of secondary ball milling are that-200 orders of ore discharge granularity and secondary graded operation more than 60% account for 60～65% overflow granularity and return the thickness grading operation together; It is characterized in that: the described ballast screen that removes adopts flat board to remove ballast screen, and sets up a flat board between the magnetic again at weak magnetic machine and in sweeping and remove ballast screen, and concrete steps are following:
1) mine tailing of thick spiral shell feeds flat screen and removes the ballast screen I, and the dull and stereotyped undersize that removes the ballast screen I feeds weak magnetic,
2) weak magnetic tail ore deposit feeds flat screen again and removes the ballast screen II, and the undersize that its flat screen removes the ballast screen II feeds
Magnetic operation in sweeping, tail is thrown as true tailings in the magnetic tail ore deposit in sweeping, and flat screen removes the oversize of ballast screen I and together feeds the secondary graded operation with the dull and stereotyped oversize that screens out the ballast screen II with inferior fine magnetite concentrate and the concentrate of sweeping middle magnetic.
The flat board that is used to remove with two sections flat boards the other technology of heavily magnetic separation of ballast screen of the present invention removes ballast screen; Comprise frame, be located at flat screen on this frame, be located at said frame below dreg-accepting hopper, be located at said upper rack feed launder, be located at said frame lower oversize and go out mine mouth and transmission device, it is characterized in that described flat screen is 5-8
oThe inclination angle be fixed on the frame; End at described flat screen is provided with ash pit; The two ends of said ash pit are fixedly connected with frame, are provided with the rubber skin that prevents that ore pulp from flashing in the junction of described feed launder and flat screen, the flat screen screen cloth is installed in frame tail end side is washed away pipeline; Flush pipe is arranged on the top of flat screen screen cloth, and with and the flat screen screen cloth washed away pipeline be rotationally connected.
Described flat screen mesh size is 2 * 40mm.
Be welded with suspension ring in described flat screen edge.
The invention has the beneficial effects as follows:
1) adopts cylinder to remove ballast screen in the former technology and needed the 60h repair time in every month; And dull and stereotyped slagging-off has screened out and changes the sieve sheet and do not have other upkeep operations outward; Can save cylinder thus and remove maintenance and the electricity expense usefulness that ballast screen brought; And, cylinder sweeps middle magnetic when upkeep operation because need stopping transport to change except that ballast screen; The grade in magnetic tail ore deposit raises in causing like this sweeping; Magnetic tail ore deposit grade is 9～9.5% in sweeping in the former technology, and existing technology can be controlled at 8.5～9% with magnetic tail ore deposit grade in sweeping, and avoids amount of metal to run off;
2) because the present invention is adopting flat board to remove ballast screen, and set up a flat board between the magnetic again at weak magnetic machine and in sweeping and remove ballast screen, can lump ore in the ore pulp and wood chip contaminant filter be fallen the obstruction of magnetic machine medium in the minimizing.In sweeping in its Central Plains technology the magnetic cleaning cartridge cycle be per 2 months once, during existing technology is swept the magnetic cleaning cartridge cycle be 6 months once, reduce sweep in the magnetizing mediums box stop up penetrating number of times, prolong its life cycle, thus magnetic machine operation rate in improving;
3) since the present invention at the terminal ash pit of installing of flat screen, by sieve go up gravity flow and coarse grain ore pulp down through ash pit, with sieving last bulk contaminant filter under residual.This ash pit degree of depth is about 20cm, and this degree of depth makes things convenient for the Field Force to carry out the manual cleanup operation;
4) because the present invention washes away pipeline at frame tail end dress; And will wash away pipeline and directly extend to screen cloth upper end, can be through the flushing of water under high pressure, with release mesh product in the ore pulp wash away to sieve down; Oarse-grained being dashed to ash pit; And the flush pipe road has a verticity, can remove the ballast screen compass screen surface to flat board and wash away thoroughly, has improved slagging-off effect and screening efficiency effectively.
Description of drawings
Fig. 1 is the flow chart of the former other technology of heavily magnetic separation.
Fig. 2 is the flow chart of the other technology of heavy magnetic separation of the present invention.
Fig. 3 is the dull and stereotyped side view that removes ballast screen of the present invention.
Fig. 4 removes the ballast screen vertical view for the present invention is dull and stereotyped.
The specific embodiment
Below in conjunction with the description of drawings specific embodiment of the present invention.
As shown in Figure 2, of the present invention with the other technology of heavily magnetic separation of two sections flat boards except that ballast screen, the other technology of heavily magnetic separation of removing ballast screen with two sections flat boards of the present invention; The sand setting that comprises the cyclone of a thickness grading operation feeds thick spiral shell, and the concentrate of thick spiral shell is given smart spiral shell, and the concentrate product of smart spiral shell feeds vibratory sieve and sieves; The undersize of its vibratory sieve is a concentrate; The mine tailing of thick spiral shell feeds except that ballast screen, and the undersize that removes ballast screen feeds weak magnetic machine and sweeps middle magnetic, and tail is thrown as true tailings in the magnetic tail ore deposit in sweeping; The mine tailing of the concentrate of magnetic, smart spiral shell, the oversize that removes ballast screen and the oversize of vibratory sieve together feed the secondary graded operation in sweeping; The sand setting of secondary graded operation feeds secondary ball milling, and-200 orders of secondary ball milling are that-200 orders of ore discharge granularity and secondary graded operation more than 60% account for 60～65% overflow granularity and return the thickness grading operation together, and it is characterized in that: the described ballast screen that removes adopts the dull and stereotyped ballast screen that removes; And set up a flat board between the magnetic again at weak magnetic machine and in sweeping and remove ballast screen, concrete steps are following:
1) mine tailing of thick spiral shell feeds flat screen and removes the ballast screen I, and the dull and stereotyped undersize that removes the ballast screen I feeds weak magnetic
Machine; 2) weak magnetic tail ore deposit feeds flat screen again and removes the ballast screen II; Magnetic operation during the undersize that its flat screen removes the ballast screen II feeds and sweeps; Tail is thrown as true tailings in the magnetic tail ore deposit in sweeping, and flat screen removes the oversize of ballast screen I and together feeds the secondary graded operation with the dull and stereotyped oversize that screens out the ballast screen II with inferior fine magnetite concentrate and the concentrate of sweeping middle magnetic.
Like Fig. 3, shown in 4; The flat board that is used for the iron ore concentrate deslagging process of the present invention removes ballast screen; Comprise frame 1, be located at flat screen 2 on this frame 1, be located at said frame 1 below dreg-accepting hopper 7, be located at 1 top of said machine feed launder 3, be located at said frame 1 bottom oversize and go out mine mouth 6 and transmission device, it is characterized in that described flat screen 2 is 5-8
oThe inclination angle be fixed on the frame 1; End at described flat screen 2 is provided with ash pit 5; The two ends of said ash pit 5 are fixedly connected with frame 1, by sieve go up gravity flow and coarse grain ore pulp down through ash pit 5, with sieving last bulk contaminant filter under residual; The degree of depth of its ash pit 5 is generally about 20cm, and this degree of depth makes things convenient for the Field Force to carry out the manual cleanup operation; Because the ore pulp impulsive force is bigger in the process of ore deposit down; The present invention is provided with the rubber skin 10 that prevents that ore pulp from flashing in the junction of described feed launder 3 and flat screen 2; In frame tail end side the flat screen screen cloth is installed and is washed away pipeline 9; Flush pipe 4 is arranged on the top of flat screen screen cloth, and washes away pipeline 9 with the flat screen screen cloth and be rotationally connected.Can be through the washing away of water under high pressure, with release mesh product in the ore pulp wash away to sieve down, improve screening efficiency.
Described flat screen mesh size is 2 * 40mm.
The present invention is welded with suspension ring 8 in described flat screen edge, can flat screen be sling through suspension ring, makes things convenient for upkeep operation.
With this dull and stereotyped remove ballast screen and be arranged on magnetic separator and sort before, can a large amount of slags in the ore pulp be filtered out, magnetic machine cartridge stops up in the minimizing, prolongs its life cycle, improves the magnetic separator operating rate.Through adopting the dull and stereotyped ballast screen that removes original drum sieve is got to be replaced, in use operate, overhaul conveniently, life cycle is long, improved slagging-off effect and screening efficiency effectively.
Claims (4)
1. other technology of heavily magnetic separation of removing ballast screen with two sections flat boards; The sand setting that comprises the cyclone of a thickness grading operation feeds thick spiral shell, and the concentrate of thick spiral shell is given smart spiral shell, and the concentrate product of smart spiral shell feeds vibratory sieve and sieves; The undersize of its vibratory sieve is a concentrate; The mine tailing of thick spiral shell feeds except that ballast screen, and the undersize that removes ballast screen feeds weak magnetic machine and sweeps middle magnetic, and tail is thrown as true tailings in the magnetic tail ore deposit in sweeping; The mine tailing of the concentrate of magnetic, smart spiral shell, the oversize that removes ballast screen and the oversize of vibratory sieve together feed the secondary graded operation in sweeping; The sand setting of secondary graded operation feeds secondary ball milling, and-200 orders of secondary ball milling are that-200 orders of ore discharge granularity and secondary graded operation more than 60% account for 60～65% overflow granularity and return the thickness grading operation together, and it is characterized in that: the described ballast screen that removes adopts the dull and stereotyped ballast screen that removes; And set up a flat board between the magnetic again at weak magnetic machine and in sweeping and remove ballast screen, concrete steps are following:
1) mine tailing of thick spiral shell feeds flat screen and removes the ballast screen I, and the dull and stereotyped undersize that removes the ballast screen I feeds weak magnetic machine, 2) weak magnetic tail ore deposit feeds flat screen again and removes the ballast screen II, and the undersize that its flat screen removes the ballast screen II feeds
Magnetic operation in sweeping, tail is thrown as true tailings in the magnetic tail ore deposit in sweeping, and flat screen removes the oversize of ballast screen I and together feeds the secondary graded operation with the dull and stereotyped oversize that screens out the ballast screen II with inferior fine magnetite concentrate and the concentrate of sweeping middle magnetic.
2. a flat board that is used to remove with two sections flat boards the other technology of heavily magnetic separation of ballast screen removes ballast screen; Comprise frame, be located at flat screen on this frame, be located at said frame below dreg-accepting hopper, be located at said upper rack feed launder, be located at said frame lower oversize and go out mine mouth and transmission device, it is characterized in that described flat screen is 5-8
oThe inclination angle be fixed on the frame; End at described flat screen is provided with ash pit; The two ends of said ash pit are fixedly connected with frame, are provided with the rubber skin that prevents that ore pulp from flashing in the junction of described feed launder and flat screen, the flat screen screen cloth is installed in frame tail end side is washed away pipeline; Flush pipe is arranged on the top of flat screen screen cloth, and with and the flat screen screen cloth washed away pipeline be rotationally connected.
3. the flat board that removes the other technology of heavily magnetic separation of ballast screen with two sections flat boards according to claim 2 removes ballast screen, it is characterized in that described flat screen mesh size is 2 * 40mm.
4. the flat board that removes the other technology of heavily magnetic separation of ballast screen with two sections flat boards according to claim 2 removes ballast screen, it is characterized in that being welded with suspension ring in described flat screen edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210347353.XA CN102824960B (en) | 2012-09-19 | 2012-09-19 | With the heavy magnetic sorting process of two sections of dull and stereotyped deslagging screens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210347353.XA CN102824960B (en) | 2012-09-19 | 2012-09-19 | With the heavy magnetic sorting process of two sections of dull and stereotyped deslagging screens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102824960A true CN102824960A (en) | 2012-12-19 |
| CN102824960B CN102824960B (en) | 2015-11-04 |
Family
ID=47328395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210347353.XA Active CN102824960B (en) | 2012-09-19 | 2012-09-19 | With the heavy magnetic sorting process of two sections of dull and stereotyped deslagging screens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102824960B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764850A (en) * | 2020-06-22 | 2020-10-13 | 中国石油大学(北京) | Hollow ball filtering and separating device and drilling string |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708481A (en) * | 2008-10-31 | 2010-05-19 | 鞍钢集团矿业公司 | Additional grading technology for spiral chute roughing tailings |
| CN201543499U (en) * | 2009-11-24 | 2010-08-11 | 鞍钢集团矿业公司 | Combined deslagging screen used for magnetic separator |
| CN101898168A (en) * | 2010-07-21 | 2010-12-01 | 衡阳县湘雁矿业有限公司 | Beneficiation method for removing long quarry impurities by adopting strong magnetic flotation |
-
2012
- 2012-09-19 CN CN201210347353.XA patent/CN102824960B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708481A (en) * | 2008-10-31 | 2010-05-19 | 鞍钢集团矿业公司 | Additional grading technology for spiral chute roughing tailings |
| CN201543499U (en) * | 2009-11-24 | 2010-08-11 | 鞍钢集团矿业公司 | Combined deslagging screen used for magnetic separator |
| CN101898168A (en) * | 2010-07-21 | 2010-12-01 | 衡阳县湘雁矿业有限公司 | Beneficiation method for removing long quarry impurities by adopting strong magnetic flotation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111764850A (en) * | 2020-06-22 | 2020-10-13 | 中国石油大学(北京) | Hollow ball filtering and separating device and drilling string |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102824960B (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101716552B (en) | Raw coal washing process capable of realizing non-polar ash conditioning | |
| CN103240168A (en) | Classifying, separating and dewatering method for high-ash-content difficultly-separated coal slime | |
| CN103623918A (en) | Steam coal washing processing method for easy-to-argillization gangues | |
| CN102319619B (en) | Graded washing process for raw coal | |
| CN205628554U (en) | Crawler -type electromagnetic ore separator | |
| JP2022509901A (en) | Systems and methods for cleaning and grading particulate matter | |
| CN102430481A (en) | Sorting process for high-ash and difficult-separation coal slime | |
| CN211436331U (en) | Reducing mechanism is used in ore dressing | |
| CN104307624A (en) | Coal slime recovery device and process | |
| CN109865588A (en) | A kind of transition zone mixing iron ore beneficiation technique | |
| CN212383872U (en) | System for reducing clean coal mud ash content in heavy-medium coal separation process | |
| CN102228866B (en) | Compound classification method and equipment for ground ore product | |
| CN105344462A (en) | Washing process for high-ash high-mud high-gangue coal | |
| CN102974543A (en) | Dense-medium dry separation equipment | |
| CN108855579B (en) | Coal dressing method by using aqueous medium cyclone | |
| CN115945288A (en) | Metal mineral enrichment process and system based on dry separation equipment | |
| CN110170370B (en) | System and process for reducing lower limit of gravity separation granularity of dense medium coal preparation plant | |
| CN206152958U (en) | TBS tail coal selects separately system | |
| CN210449500U (en) | Coal dressing and desliming system for coal slime reseparation | |
| CN209997781U (en) | Coarse coal slime dense medium sorting system | |
| CN104437837A (en) | Technology of refuse discharging with vibrating screen | |
| CN102179290A (en) | Method for recycling clean coal from high-ash coal slurry tailings | |
| CN101757974B (en) | Grading method for recovering refined coal from coal slime | |
| CN102824960B (en) | With the heavy magnetic sorting process of two sections of dull and stereotyped deslagging screens | |
| CN201543499U (en) | Combined deslagging screen used for magnetic separator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee after: Anshan Iron and Steel Group Mining Co., Ltd. Address before: 114001 Anshan District, Liaoning, No. 219 Road, No. 39, Tiedong Patentee before: Angang Group Mine Company |