CN107552221A - A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique and system - Google Patents
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique and system Download PDFInfo
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Abstract
The invention discloses a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique and system, belong to technical field of beneficiation.The chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present invention, pass through broken → roller mill → screening → magnetic separation → is classified → the step of adopting hole, and it is arranged into by the system equipment of " the wet magnetic separation technique under the fully closed road+sieve of high pressure roller mill wet screening " that forms high-pressure roller mill, screening plant and magnetic separator near openpit, openpit will close hole, as Tailings Dam.The problem of there is the problems such as floor space is big, stockpiling is difficult, pollution environment in the discharge that the present invention solves ore mine tailing, openpit is discharged into if also solved, existing fed distance length, and cost is high.
Description
Technical field
The present invention relates to technical field of beneficiation, more particularly to a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique and
System.
Background technology
More than 1,000,000,000 tons of the annual output mine tailing in China, more than the 50% of whole world mine tailing production total amount is accounted for, so huge tail
Ore deposit amount needs stockpiling place, inevitably takes substantial amounts of land resource.Meanwhile because the construction of Tailings Dam certainly will increase
The quantity of major hazard source, also bring along serious environmental and safety problems.With the expansion of China's opencast mining scale, adopt
The continuous deepening in field, the big-and-middle-sized surface mine of most domestic switch to deep seat cut in succession.From saving the area and reduce high dam
The angle for the high potential energy dangerous matter sources that mine tailing place is formed, it is optimal choosing by the use of closing adopting after cheating and cheating as the stockpiling place of mine tailing
Select.
Openpit is a deep pit below its sealing ring in terms of orographic condition, and its volume is big, for storing up mine tailing,
It is a preferable place, from technology, safety, the Tailings Dam for being economically superior to build a same size, it is possible to achieve " low
Input, more return "；Avoid the high potential energy dangerous matter sources of high dam mine tailing place formation；Eliminate ring of the Tailings Dam operation to periphery
Pollute in border；Openpit is also easily cultivated and utilized again after piling with tailings, can be that enterprise and society bring huge economic effect
Benefit and social benefit.
In recent years, in order to preferably do Tailings Dam using openpit, many scientific research institutions all conduct in-depth research,
Through retrieval, the existing technique using openpit tailing disposal has：Paper《The big stone river iron ore of Shoudu Iron and Steel Co is discarded outdoor adopts hole heap greatly
Deposit mine tailing research》(《Project design》06 month 2008 total 124th phase) from basic data, it is big adopt hole Tailings Dam geology with
The big feasibility and the length of service for adopting hole stockpiling mine tailing of hydrogeological analyzing, to Tailings emission point and backed-up water level
Put, Sending tailings scheme and tailings recycling water system schema compare, using big hole stockpiling mine tailing of adopting not only without sign
Ground, reduced investment, running cost are low, the construction time is short, and after storehouse is closed, build up fields, can substantially change to depositing beach progress earthing in storehouse
Kind ecological environment.But article, without reference to the emission problem of coarse grain wet type pre-selecting mine tailing, does not also solve just for true tailings
Mine tailing long-distance sand transport problem.
Paper《Openpit reconstructs Tailings Dam Key Technology》(Institutes Of Technology Of Hebei's journal (natural science edition) 2008
The August third phase of volume 30 in year) key technology for adopting hole reconstruction Tailings Dam has been systematically discussed, it is related to the determination of Tailings Dam volume, tail
Ore deposit storehouse side slope safety is stable, and Tailings Dam drains off floodwaters, the security reliability of return water system, and in hole the side such as tailings discharging home determination
Face, the effect for being worth the method for reference and playing directiveness, but article are provided to adopt the implementation of hole reconstruction Tailings Dam engineering project
Also without the emission problem and mine tailing long-distance sand transport problem for being related to coarse grain wet type pre-selecting mine tailing.
China Patent No.：201610517474.2 publication date 2016.12.07 patent document discloses one kind in activity
The method of the open-air pit bottom tailing disposal lotion of sedimentation, this method comprise the following steps：S1, the test and appraisal of CHARACTERISTICS OF TAILINGS SAND；S2, mine tailing cream
The detection of body sample；S3, the setting at the open-air pit bottom of activity sedimentation；S4, tailings paste discharge.Problem be present：Need mine tailing
Lotion is made, and the discharge cycle is also greater than the consolidation cycle of mine tailing, equally exists the long-distance sand transport problem of mine tailing.
Chromium depleted zone high pressure roller mill ultrafine grinding sieves wet type process for discarding tailings under full closed-circuit screen to be implemented from the recessed mountain ore dressing plant of horse steel
Afterwards, it also form theoretical result.《Application present situation of the high pressure roller mill technique in China's Metallurgical Mines》(Modern Mineral in September, 2009
9th phase, total 485th phase)：With reference to production practices both domestic and external, the characteristics of to high pressure roller mill technique, typical process and China's high pressure
The development of roller grinding process and applicable cases are analyzed, and have been highlighted recessed mountain ore dressing plant and have been designed use as China's First
The flow and benefit in the ore dressing plant of high pressure roller mill-ball-milling technology.But its high pressure roller mill ultrafine grinding sieves wet type under fully closed road-sieve and thrown
Tail technique, which is built in, to be selected in factory, the problems such as rough concentrate coarse grain conveying cost is high be present, and without proposition solution.
These researchs and production application all without solving the problems, such as long-distance sand transport of the tailings discharging to openpit, no matter tail
Ore deposit be low concentration conveying or concentration after Rich thickness transportation or by mine tailing be fabricated to lotion conveying, be all at a distance it is defeated
Send, there is very high requirement to Pulp pump and conveyance conduit, while add the processing cost of ore.Especially as high pressure roller mill-
Preselect application of the technique in chromium depleted zone ore dressing, the discharge of coarse grain mine tailing caused by pre-selection has that floor space is big, stockpiling is tired
The problems such as difficult, pollution environment, if being discharged into openpit, there is also fed distance length, the problem of cost is high.
The content of the invention
1. invention technical problems to be solved
The problem of for the emission problem of wet type pre-selecting mine tailing present in prior art and mine tailing long-distance sand transport, this hair
It is bright to provide a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique and system.The Ore Transportation amount that reduces, drop can be reached
Low Ore Transportation cost, the purpose for solving tailings impoundment, so as to effectively reduce mine operation cost.
2. technical scheme
To reach above-mentioned purpose, technical scheme provided by the invention is：
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique, step are：
It is Step 1: broken：Chromium depleted zone is transferred into disintegrating machine to carry out being crushed to product in small, broken bits；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: screening：Powder is transferred to after screening plant is sieved and is divided into oversize and undersize；
Step 4: magnetic separation：Undersize throws tail through magnetic separator magnetic separation, and concentrate enters mill screening device；
Step 5: classification：Throwing tail mine tailing is transferred to grading plant and carries out being classified as coarse grain mine tailing and fine tailings；
Step 6: adopt hole：Fine tailings pulp gravity flow enters openpit.
Further technical scheme, the Iron grade of chromium depleted zone described in step 1 is 18~35%, and head grade is less than
When 18%, ore dressing is high, and cost is high, and profitability is poor, and the market competitiveness is low；When higher than 35%, high pressure roller mill wet magnetic separation is thrown
The amount of tail is low, and larger with this supporting high pressure roller mill technology investment, and because throwing tail drops, this effect is poor, and investment return is poor, therefore,
For present invention process, rational raw ore Iron grade is that inventor is directed to present invention process between 18~35%, with reference to
Collection, the analysis of data, the accounting 75~90% of the result for considering and studying, wherein Armco magnetic iron, when low in technical process
When 75%, illustrate in iron ore containing bloodstone, pyrite etc. is other does not have magnetic iron ore, according to magnetic separation (i.e.
Step 4), then in the entrance such as bloodstone mine tailing, cause the reduction of iron resource utilization rate；The product granularity in small, broken bits control 16~
50mm, when granularity is larger, roll surface wearing is big, and cost is high；When granularity is smaller, reduction ratio is low, is carried out using high pressure roller mill ultra-fine
Broken advantage is difficult to play；
Screening plant is wet screening in step 3, and screen size is 3~8mm；The oversize returns to high pressure roller mill
Machine carries out secondary operation；
Magnetic separator is midfield intensity magnetic separator in step 4, is wet magnetic separation, magnetic field intensity in 238.95~398.09kA/m,
That is for magnetic field intensity between 3000~5000 oersteds, inventor is mainly the rate of recovery for considering to improve magnetic iron ore mineral, is kept away
Exempt from Armco magnetic iron mineral and be lost to mine tailing because field strength is low, the field strength is to use rare earth magnetic system, when field strength is higher, equipment price
Height, its Armco magnetic iron mineral recovery rate uprise, therefore, for present invention process, magnetic field intensity 238.95~
398.09kA/m it is preferable value range；
Fish for coarse grain mine tailing by spiral classifier or dehydration and vibration sieve in step 5 and make building materials use；
Adopted in step 6 after being stood in hole, top clear water backwater is wet magnetic separation make-up water source into midfield intensity magnetic separator.
Further technical scheme, openpit will close hole, as Tailings Dam；And by the high-pressure roller mill, screening
Device and magnetic separator are arranged near openpit.
Further technical scheme, in step 4, after oversize carries out dry type magnetic separation, dry type magnetic separation mine tailing makees coarse grain tail
Ore deposit and the coarse grain mine tailing merging treatment in step 5, dry type magnetic separation concentrate are transferred to high-pressure roller mill and carry out secondary operation.
Further technical scheme, the ore discharge product of step 2 high-pressure roller mill enter progress wet screening and first pass through wet type
Beater is broken up.
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system, including arranged successively in production line by process sequence
Disintegrating machine, high-pressure roller mill, wet type beater, screening plant, midfield intensity magnetic separator, grading plant and the openpit of row.
Further preliminary rejection exhaust system, wet type beater includes cylinder, power set and transmission device, described dynamic
Power apparatus fixes on the ground, including motor, reductor and shaft coupling, is connected in continous way；The cylinder includes charging
End and discharge end, set in tilting of the feed end in upper, discharge end under；Cylinder body outer wall sets gear ring cover, interior wall liner rubber
Liner plate, stock guide is fixed along rubber lining inner ring contour；The transmission device includes gear wheel and assembles and nibbled with gear wheel assembling
Close the little gear assembling of connection；The reductor is assembled by shaft coupling and little gear and gear wheel assembling is connected；Greatly
Gear assembling is used cooperatively with gear ring cover.
Further preliminary rejection exhaust system, wet type beater also include riding wheel apparatus and catch wheel device；The support roller
Device fixes on the ground, is rotary shaft rolling bearing support roller group, including 4 support rollers and 2 runners, is divided into front and rear symmetrical two
Group, every group again in runner in, support roller be symmetrical set in runner both sides, runner and cylinder or so two parts outer wall setting
Rolling ring is rotatablely connected；The catch wheel device is conical surface catch wheel device, and frustoconical bevel angle≤2 degree are consistent with the angle of inclination of cylinder, if
Put between 2 runners in left side.
Further preliminary rejection exhaust system, the motor of wet type beater is variable-frequency motor；The stock guide is spiral
Stock guide；The gear ring cover is semi-closed structure；Gear wheel assembling is arranged on cylinder with latch plate.
Further preliminary rejection exhaust system, the gear wheel assembling gear engagement place of wet type beater set peep hole；
The rolling ring makes for hard rubber material.
Further preliminary rejection exhaust system, drum speed is 15~20 circles/minute；The motor of the wet type beater
Job step is：Gear wheel of the rivet clasp on cylinder is driven to assemble by motor via reducer, shaft coupling connection little gear assembling,
So as to drive barrel body rotation；After high-pressure roller mill pie product enters in cylinder, appropriate water is added, there is rubber lining in cylinder
Plate, there is stock guide on liner plate, because the tilting of cylinder rotates, material is constantly risen and thrown with the rotation of cylinder by stock guide
Fall, while stock guide water is sent in cylinder quickly so that material on the cross section in cylinder more uniform distribution scatter；Thing
Material gradually moves in stock guide and during leaving to discharge end, until discharge cylinder.
3. beneficial effect
Using technical scheme provided by the invention, compared with prior art, have the advantages that：
(1) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the invention, high-pressure roller mill is migrated to adopting
, and magnetic separation pre-selection is carried out to high pressure roller product, mine tailing after pre-selection is screened fish for coarse sand after, fine tailings are directly discharged to
Openpit, the technique can reduce Ore Transportation amount, reduce Ore Transportation cost, solves the problems, such as coarse grain tailings impoundment, so as to
Effectively reduce mine operation cost；
(2) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the invention, solves coarse grain caused by pre-selection
There is the problems such as floor space is big, stockpiling is difficult, pollution environment in the discharge of mine tailing, also solve when being discharged into openpit, deposit
Fed distance length, the problem of cost is high；
(3) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the invention, fine tailings enter dew through gravity flow
It adopts hole, and the Water Sproading for adopting hole clarification is pumped into the recycling of high pressure roller mill factory building, avoids the waste of water resource；
(4) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the invention, suitable for the iron product of chromium depleted zone
Position is 18~35%, the wherein accounting 75~90% of Armco magnetic iron；Although defining the grade of ore, to meeting the grade requirement
Iron ore is with strong points without testing again, avoids the duplication of labour；
(5) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the invention, for the poor magnet of specific grade
Ore, industry prejudice is overcome, from the ore-dressing technique of " high pressure roller mill sieves wet type pre-selecting under fully closed road+sieve and throws tail ", played
Unexpected technique effect；
(6) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the invention, with reference to " high pressure roller mill screening is fully closed
Wet type pre-selecting throws tail under road+sieve " use, the pie product of high-pressure roller mill is carried out into Wet-type high-efficient breaks up, cylinder, power set
With the mating reaction of transmission device, little gear assembling is coupled by shaft coupling, reductor by motor and drives rivet clasp on cylinder
Gear wheel assembles, so as to drive barrel body rotation；After high-pressure roller mill pie product enters in cylinder, appropriate water, cylinder are added
Inside there is rubber lining, have stock guide on liner plate, because the tilting of cylinder rotates, stock guide is as the rotation of cylinder is constantly by thing
Material rises and left, while stock guide water is sent in cylinder quickly, so that material is more uniform on the cross section in cylinder
Distribution scatters, and material gradually moves in stock guide and during leaving to discharge end, until discharge cylinder, complete whole immersion and
Breakdown process；Material after breaing up carries out wet screening again, reaches wet type and breaks up synergistic action effect with wet screening, improves
The operating efficiency of screening, moreover, also improving transmission efficiency of the current to material, and then improve the work effect of whole system
Rate；
(7) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the invention, wet type beater riding wheel apparatus
Use, to supporting cylinder, and reduce frictional resistance；
(8) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the invention, wet type beater runner and cylinder
The rolling ring rotation connection that left and right two parts outer wall is set, to bear pair of the weight of whole rotary body and material, support roller and runner
Title formula is used cooperatively, and simple in construction, easy to maintenance, frictional resistance is smaller；
(8) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the invention, wet type beater catch wheel device
Set, avoid cylinder deadweight due to tilting installation and caused sliding force and because rolling ring and support roller axis are not parallel and produce
Additional axial force cause the left and right of cylinder and movable；The setting of spiral stock guide, water and material is set to soak and drop
Middle flow of slurry is stable, material cake decomposes soon；Variable-frequency motor frequency control, it can adjust drum speed and the material speed of service, energy
Effectively effect is broken up in control；
(9) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the invention, wet type beater conical surface gear wheel dress
Put, when avoiding the axial location of rotary body from being difficult to determine, to limit axial float of the cylinder in rotation；Gear ring cover seals for half
Structure is closed, is easy to observe the working condition of latch plate, is advantageous to the radiating of gear ring；Gear wheel assembling is arranged on cylinder with latch plate
Body, latch plate play a part of buffering gravity, avoid the hard engagement of gear wheel assembling and little gear assembling, improve it and use the longevity
Life；
(10) a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the invention, wet type beater gear engagement place
Provided with peep hole, the engagement situation of the flank of tooth and the glycerine lubrication of the flank of tooth can be inspected；The setting of frustoconical bevel angle, according to the character of material
It is adjusted, improves device versatility；Vulcanie rolling ring avoids intermetallic contact, has both played buffering left and right, has reduced again
Frictional resistance；Equipment is light, reduced investment, and power is small, wear-resisting, operating cost is low；Device structure is simple, novel, and configuration is compact, closes
Reason, disposal ability is big, easy to operate, reliable, can reduce into screening plant plus water slurrying ring using the beater
Section, subsequent wet screening efficiency can be greatly improved.
Brief description of the drawings
Fig. 1 is the technological process framework sketch of the present invention；
The process chart of Fig. 2 embodiments 5；
Fig. 3 is the wet type beater structural representation in the present invention；
Fig. 4 is the wet type beater top view in the present invention (after removing cylinder)；
Fig. 5 is profile at Fig. 3 A-A.
In figure：1- motors, 2- reductors, 3- shaft couplings, the assembling of 4- little gears, the assembling of 5- gear wheels, 6- gear rings cover, 7- cylinders
Body, 8- feed ends, 9- discharge ends, 10- catch wheel devices, 12- riding wheel apparatus, 13- runners, 14- rubber linings, 15- stock guides,
16- rolling rings.
Embodiment
To further appreciate that present disclosure, with reference to accompanying drawing, the present invention is described in detail.
Embodiment 1
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, the Iron grade of the raw ore of application are
TFe18.71%, iron in ore mineral are mainly magnetic iron ore, the occupation rate 80.95% of Armco magnetic iron；Ore dressing plant scale is 7,200,000 t/
A, by " the wet magnetic separation work under the fully closed road+sieve of high pressure roller mill wet screening of high-pressure roller mill, screening plant and magnetic separator composition
The system equipment of skill " is arranged near openpit, and openpit will close hole, as Tailings Dam；Step is：As shown in figure 1,
It is Step 1: broken：By stope extracted ore through existing conventional Three stage crushing with single closed circuit stage to 16mm or so；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: screening：Powder is transferred into wet screening device to be sieved, is divided into oversize and undersize, is sieved
Below the granularity 3mm of lower product；
Step 4: magnetic separation：Undersize throws tail through wet type midfield high intensity magnetic separation, the field strength of midfield intensity magnetic separator for 238.95~
318.47kA/m, application cylinder body linear resonance surface velocity, separation dividing plate distance；Magnetic concentrate is delivered to main building ball milling point by Pulp pump
Level system carries out follow-up mill and is elected to be industry；
Step 5: concentration：Throw tail mine tailing, Iron grade<10%, concentrated through concentrator；
Step 6: adopt hole：Thickener underflow flow to openpit certainly.
Through measuring and calculating, the chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, conveying mine tailing amount can be reduced
127.41 ten thousand t/a, directly reduce by 3,820,000 yuan of cost of conveying.
Embodiment 2
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, the Iron grade of the raw ore of application are
TFe25%, iron in ore mineral are mainly magnetic iron ore, the occupation rate 75.56% of Armco magnetic iron；Ore dressing plant scale is 6,500,000 t/a,
Same " the wet magnetic separation under the fully closed road+sieve of high pressure roller mill wet screening by high-pressure roller mill, screening plant and magnetic separator composition
The system equipment of technique " is arranged near openpit, and openpit will close hole, as Tailings Dam；Basic step is the same as implementation
Example 1, through measuring and calculating, the chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, conveying mine tailing amount can be reduced
133.32 ten thousand t/a, directly reduce by 4,000,000 yuan of cost of conveying.
Embodiment 3
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, the Iron grade of the raw ore of application are
TFe35%, iron in ore mineral are mainly magnetic iron ore, the occupation rate 90% of Armco magnetic iron；Ore dressing plant scale is 6,500,000 t/a, equally
" the wet magnetic separation work under the fully closed road+sieve of high pressure roller mill wet screening by high-pressure roller mill, screening plant and magnetic separator composition
The system equipment of skill " is arranged near openpit, and openpit will close hole, as Tailings Dam；Processing step is：
It is Step 1: broken：By stope extracted ore through existing conventional Three stage crushing with single closed circuit stage to 50mm or so；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: screening：Powder is transferred into wet screening device to be sieved, is divided into oversize and undersize, is sieved
Below the granularity 8mm of lower product；
Step 4: magnetic separation：Undersize throws tail through wet type midfield high intensity magnetic separation, the field strength of midfield intensity magnetic separator for 238.95~
398.09kA/m, application cylinder body linear resonance surface velocity, separation dividing plate distance；Magnetic concentrate is delivered to main building ball milling point by Pulp pump
Level system carries out follow-up mill and is elected to be industry；
Step 5: classification：The mine tailing coarse grain tailings for sieving lower wet magnetic separation is dragged for by spiral classifier or dehydration and vibration sieve
Coarse grain mine tailing is taken to make building sand use；
Step 6: adopt hole：Fine tailings pulp gravity flow enters openpit.
A kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, the coarse grain mine tailing after pre-selection can be made
Sold for building materials, fine tailings are directly discharged to openpit.The present embodiment can reduce Ore Transportation amount, reduce Ore Transportation
Cost, solves the problems, such as tailings impoundment, so as to effectively reduce mine operation cost.
Embodiment 4
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the present embodiment, including press technique in production line successively
Tactic disintegrating machine, high-pressure roller mill, wet type beater, screening plant, midfield intensity magnetic separator, grading plant and outdoor adopt
Hole, and by high-pressure roller mill, wet type beater, screening plant and midfield intensity magnetic separator composition " high pressure roller mill wet screening is complete
The system equipment of the lower wet magnetic separation technique of closed circuit+sieve " is arranged near openpit, and openpit will close hole, as mine tailing
Storehouse；
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, the Iron grade of the raw ore of application are
TFe26.55%, iron in ore mineral are mainly magnetic iron ore, the occupation rate 82.33% of Armco magnetic iron；Ore dressing plant scale is 7,500,000 t/
A, step are：
It is Step 1: broken：By stope extracted ore through existing conventional Three stage crushing with single closed circuit stage to 50mm or so；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: break up：Material after ultrafine grinding is due in pie, it is not easy to sieves, therefore, can be broken up by wet type
Machine carries out follow-up screening operation again after breaing up；
Step 4: screening：Powder is transferred into wet screening device to be sieved, is divided into oversize and undersize, is sieved
Below the granularity 8mm of lower product；
Step 5: magnetic separation：Undersize throws tail through wet type midfield high intensity magnetic separation, the field strength of midfield intensity magnetic separator for 238.95~
398.09kA/m, application cylinder body linear resonance surface velocity, separation dividing plate distance；Magnetic concentrate is delivered to main building ball milling point by Pulp pump
Level system carries out follow-up mill and is elected to be industry；
Step 6: classification：The mine tailing coarse grain tailings for sieving lower wet magnetic separation is dragged for by spiral classifier or dehydration and vibration sieve
Coarse grain mine tailing is taken to make building sand use；
Step 7: adopt hole：Fine tailings pulp gravity flow enters openpit.
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system and technique of the present embodiment, the use of wet type beater, beat
Material after dissipating carries out wet screening again, reaches wet type and breaks up synergistic action effect with wet screening, improves the work of screening
Make efficiency, moreover, also improving transmission efficiency of the current to material, and then improve the operating efficiency of whole system.
Embodiment 5
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the present embodiment, basic structure are different and change with embodiment 4
Enter part to be：As shown in Fig. 3,4,5, wet type beater includes cylinder 7, power set and transmission device, the power set
Fix on the ground, including motor 1, reductor 2 and shaft coupling 3, it is connected in continous way；The cylinder 7 includes feed end 8
With discharge end 9, specification is ￠ 2400mm*5400mm, is set in feed end 8 in tilting upper, that discharge end 9 is under, angle is
1.5 degree；The outer wall of cylinder 7 sets gear ring cover 6, rubber lining 14 thick interior wall liner 20mm, is fixed along the inner ring contour of rubber lining 14
Stock guide 15, stock guide are highly 50mm, spacing 200mm；The transmission device includes gear wheel assembling 5 and filled with gear wheel
Little gear assembling 4 with 5 engagement connections；The reductor 2 is passed by shaft coupling 3 and little gear assembling 4 and gear wheel assembling 5
Dynamic connection；Gear wheel assembling 5 is used cooperatively with gear ring cover 6, and the cover of gear ring cover 6 is closed in the top of gear wheel assembling 5.
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, step are：As shown in Fig. 2
It is Step 1: broken：By stope extracted ore through existing conventional Three stage crushing with single closed circuit stage to 30mm or so；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: break up：Material after ultrafine grinding is due in pie, it is not easy to sieves, therefore, can be broken up by wet type
Machine carries out follow-up screening operation again after breaing up；According to material pie thickness, if 20mm or so, can design requirement material exist
Residence time >=20 second in cylinder 7, the rotating speed of cylinder 7 are 15 circles/minute.Small tooth is coupled by reductor 2, shaft coupling 3 by motor 1
Wheel assembling 4 drives gear wheel assembling 5 of the rivet clasp on cylinder, so as to drive cylinder 7 to rotate；High-pressure roller mill pie product enters
After in cylinder 7, appropriate water is added, recirculated water can be used, have rubber lining 14 in the cylinder of cylinder 7, there is stock guide 15 on liner plate,
Because the tilting of cylinder 7 rotates, material is constantly risen and left with the rotation of cylinder 7 by stock guide 15, while stock guide
15 water is sent in cylinder quickly so that material on the cross section in cylinder 7 more uniform distribution scatter, material is in stock guide
15 and gradually moved to discharge end 9 during leaving, until discharge cylinder 7, completes whole immersion and breakdown process；
Step 4: screening：Rear material will be broken up it is transferred to wet screening device and be sieved, and will be divided into oversize and sieve is lower produces
Product, below the granularity 3mm of undersize；
Step 5: magnetic separation：Undersize throws tail through wet type midfield high intensity magnetic separation, the field strength of midfield intensity magnetic separator for 238.95~
398.09kA/m, application cylinder body linear resonance surface velocity, separation dividing plate distance；Magnetic concentrate is delivered to main building ball milling point by Pulp pump
Level system carries out follow-up mill and is elected to be industry；Oversize can also carry out dry type magnetic separation, dry type magnetic separation mine tailing make coarse grain mine tailing with
Coarse grain mine tailing merging treatment in step 6, dry type magnetic separation concentrate are transferred to high-pressure roller mill and carry out secondary operation；
Step 6: classification：The mine tailing coarse grain tailings for sieving lower wet magnetic separation is dragged for by spiral classifier or dehydration and vibration sieve
Coarse grain mine tailing is taken to make building sand use；
Step 7: adopt hole：Fine tailings pulp gravity flow enters openpit.
A kind of the chromium depleted zone coarse grain wet type pre-selecting tailings discharging system and technique of the present embodiment, with reference to " high pressure roller mill sieves
Wet type pre-selecting under fully closed road+sieve is divided to throw tail " use, the pie product of high-pressure roller mill is carried out into Wet-type high-efficient breaks up, and cylinder, moves
The mating reaction of power apparatus and transmission device, little gear assembling is coupled by shaft coupling, reductor by motor and drives rivet clasp in cylinder
Gear wheel assembling on body, so as to drive barrel body rotation；After high-pressure roller mill pie product enters in cylinder, add appropriate
Water, have rubber lining in cylinder, have stock guide on liner plate, because the tilting of cylinder rotates, stock guide with cylinder rotation not
It is disconnected that material is risen and left, while stock guide water is sent in cylinder quickly, so that material is on the cross section in cylinder
More uniform distribution scatters, and material gradually moves in stock guide and during leaving to discharge end, until discharge cylinder, is completed whole
Individual immersion and breakdown process；Material after breaing up carries out wet screening again, reaches wet type and breaks up synergy with wet screening
Effect, improves the operating efficiency of screening, moreover, also improving transmission efficiency of the current to material, and then improves whole system
The operating efficiency of system.
Embodiment 6
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the present embodiment, basic structure are different and change with embodiment 5
Enter part to be：Wet type beater also includes riding wheel apparatus 12 and catch wheel device 10；The riding wheel apparatus 12 fixes on the ground,
For rotary shaft rolling bearing support roller group, including 4 support rollers and 2 runners 13, symmetrical two groups before and after being divided into, every group is in again runner
13 in, support roller is symmetrical set in the both sides of runner 13,16 turns of the rolling ring that runner 13 is set with two parts outer wall of cylinder 7 or so
Dynamic connection, the use of riding wheel apparatus 12, to supporting cylinder 7, and reduces frictional resistance；The catch wheel device 10 is conical surface gear wheel
Device, frustoconical bevel angle≤2 degree are consistent with the angle of inclination of cylinder, be arranged on left side 2 runners 13 between, avoid due to
Tilt installation cylinder deadweight and caused sliding force and because rolling ring and support roller axis it is not parallel and caused by add axial force make
Into the left and right of cylinder and move forward and backward.
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, basic step are different and change with embodiment 5
Enter part to be：The rotating speed of cylinder 7 is 20 circles/minute；Little gear is coupled by reductor 2, shaft coupling 3 by motor 1 and assembles (4) band
Gear wheel assembling 5 of the dynamic rivet clasp on cylinder, so as to drive cylinder 7 to rotate；High-pressure roller mill pie product enters in cylinder 7
Afterwards, appropriate water is added, has rubber lining 14 in cylinder 7, there is stock guide 15 on liner plate, because the tilting of cylinder 7 rotates, guide
Material is constantly risen and left with the rotation of cylinder 7 by plate 15, while water is sent in cylinder quickly of stock guide 15, so that
Material on the cross section in cylinder 7 it is more uniform distribution scatter；Material stock guide 15 and during leaving gradually to discharging
The movement of end 9, until discharge cylinder 7.
Embodiment 7
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the present embodiment, basic structure are different and change with embodiment 6
Enter part to be：The motor 1 of wet type beater is variable-frequency motor；The stock guide 15 is spiral stock guide；The gear ring cover 6 is
Semi-closed structure；Gear wheel assembling 5 is arranged on cylinder 7 with latch plate.The gear wheel of wet type beater assembles 5 gear engagement places
Peep hole is set, the engagement situation of the flank of tooth and the glycerine lubrication of the flank of tooth can be inspected；The rolling ring 16 makes for hard rubber material.
Embodiment 8
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system of the present embodiment, structure is the same as embodiment 7；
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique of the present embodiment, the Iron grade of the raw ore of application are
TFe26.55%, iron in ore mineral are mainly magnetic iron ore, the occupation rate 82.33% of Armco magnetic iron；Ore dressing plant scale is 7,500,000 t/
A, step are：
It is Step 1: broken：By stope extracted ore through existing conventional Three stage crushing with single closed circuit stage to 16mm or so；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: break up：Material after ultrafine grinding is due in pie, it is not easy to sieves, therefore, can be broken up by wet type
Machine carries out follow-up screening operation again after breaing up；According to material pie thickness, if 30mm or so, can design requirement material exist
Residence time >=30 second in cylinder 7, the rotating speed of cylinder 7 are 13 circles/minute.Small tooth is coupled by reductor 2, shaft coupling 3 by motor 1
Wheel assembling 4 drives gear wheel assembling 5 of the rivet clasp on cylinder, so as to drive cylinder 7 to rotate；High-pressure roller mill pie product enters
After in cylinder 7, appropriate water is added, recirculated water can be used, have rubber lining 14 in the cylinder of cylinder 7, there is stock guide 15 on liner plate,
Because the tilting of cylinder 7 rotates, material is constantly risen and left with the rotation of cylinder 7 by stock guide 15, while stock guide
15 water is sent in cylinder quickly so that material on the cross section in cylinder 7 more uniform distribution scatter, material is in stock guide
15 and gradually moved to discharge end 9 during leaving, until discharge cylinder 7, completes whole immersion and breakdown process；
Step 4: screening：Rear material will be broken up it is transferred to wet screening device and be sieved, and will be divided into oversize and sieve is lower produces
Product, below the granularity 3mm of undersize；
Step 5: magnetic separation：Undersize throws tail through wet type midfield high intensity magnetic separation, and the field strength of midfield intensity magnetic separator is
312.09kA/m, application cylinder body linear resonance surface velocity, separation dividing plate distance；Magnetic concentrate is delivered to main building ball milling point by Pulp pump
Level system carries out follow-up mill and is elected to be industry；Oversize can also carry out dry type magnetic separation, dry type magnetic separation mine tailing make coarse grain mine tailing with
Coarse grain mine tailing merging treatment in step 6, dry type magnetic separation concentrate are transferred to high-pressure roller mill and carry out secondary operation；
Step 6: classification：The mine tailing coarse grain tailings for sieving lower wet magnetic separation is dragged for by spiral classifier or dehydration and vibration sieve
Coarse grain mine tailing is taken to make building sand use；
Step 7: adopt hole：Fine tailings pulp gravity flow enters openpit.
The chromium depleted zone coarse grain wet type pre-selecting tailings discharging system and technique of the present embodiment, to technical process of the invention
Speech, compared to prior art and embodiment 1 to 7, Iron grade is TFe26.55% or so, the occupation rate 82.33% of Armco magnetic iron is left
The right side, in conjunction with 312.09kA/m magnetic field intensity, and other technological parameters in technical process, it is that optimal technological parameter coordinates
Than calculating through inventor, the t/a of conveying mine tailing amount 180.41 ten thousand can be reduced, 5,870,000 yuan of cost of conveying is directly reduced, so as to have
Effect reduces mine operation cost.
Schematically the present invention and embodiments thereof are described above, this describes no restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So if common skill of this area
Art personnel are enlightened by it, without departing from the spirit of the invention, without designing and the technical scheme for creativeness
Similar frame mode and embodiment, protection scope of the present invention all should be belonged to.
Claims (10)
1. a kind of chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique, it is characterised in that step is：
It is Step 1: broken：Chromium depleted zone is transferred into disintegrating machine to carry out being crushed to product in small, broken bits；
Step 2: roller is ground：Material is transferred to high-pressure roller mill and carries out ultrafine grinding after broken；
Step 3: screening：Powder is transferred to after screening plant is sieved and is divided into oversize and undersize；
Step 4: magnetic separation：Undersize throws tail through magnetic separator magnetic separation, and concentrate enters mill screening device；
Step 5: classification：Throwing tail mine tailing is transferred to grading plant and carries out being classified as coarse grain mine tailing and fine tailings；
Step 6: adopt hole：Fine tailings pulp gravity flow enters openpit.
2. chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique according to claim 1, it is characterised in that：
The Iron grade of chromium depleted zone described in step 1 is 18~35%, wherein Armco magnetic iron accounting 75~90%；The production in small, broken bits
Product Task-size Controlling is in 16~50mm；
Screening plant is wet screening in step 3, and screen size is 3~8mm；The oversize returns to high-pressure roller mill and entered
Row secondary operation；
Magnetic separator is midfield intensity magnetic separator in step 4, is wet magnetic separation, magnetic field intensity is in 238.95~398.09kA/m；
Fish for coarse grain mine tailing by spiral classifier or dehydration and vibration sieve in step 5 and make building materials use；
Adopted in step 6 after being stood in hole, top clear water backwater is wet magnetic separation make-up water source into midfield intensity magnetic separator.
3. chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique according to claim 1 or 2, it is characterised in that：It is described
Openpit will close hole, as Tailings Dam；And the high-pressure roller mill, screening plant and magnetic separator are arranged into openpit
Near.
4. chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique according to claim 3, it is characterised in that：The step
In four, after oversize carries out dry type magnetic separation, dry type magnetic separation mine tailing makees coarse grain mine tailing and merges place with the coarse grain mine tailing in step 5
Reason, dry type magnetic separation concentrate are transferred to high-pressure roller mill and carry out secondary operation.
5. chromium depleted zone coarse grain wet type pre-selecting tailings discharging technique according to claim 3, it is characterised in that：Step 2 is high
Wet type beater is first passed through before the ore discharge product entrance progress wet screening of pressure roller grinding machine to break up.
A kind of 6. chromium depleted zone coarse grain wet type pre-selecting tailings discharging system described in claim 5, it is characterised in that：Including successively
In production line by the disintegrating machine of process sequence arrangement, high-pressure roller mill, wet type beater, screening plant, midfield high intensity magnetic separation
Machine, grading plant and openpit.
7. chromium depleted zone coarse grain wet type pre-selecting tailings discharging system according to claim 6, it is characterised in that：The wet type
Beater includes cylinder (7), power set and transmission device, and the power set fix on the ground, including motor (1), subtracts
Fast machine (2) and shaft coupling (3), are connected in continous way；The cylinder (7) includes feed end (8) and discharge end (9), be in into
Expect that the tilting of end (8) in upper, discharge end (9) under is set；Cylinder (7) outer wall sets gear ring cover (6), interior wall liner rubber lining
(14), stock guide (15) is fixed along rubber lining (14) inner ring contour；The transmission device include gear wheel assembling (5) and with it is big
The little gear assembling (4) of gear assembling (5) engagement connection；The reductor (2) passes through shaft coupling (3) and little gear assembling (4)
And gear wheel assembling (5) drive connection；Gear wheel assembling (5) is used cooperatively with gear ring cover (6).
8. chromium depleted zone coarse grain wet type pre-selecting tailings discharging system according to claim 7, it is characterised in that：The wet type
Beater also includes riding wheel apparatus (12) and catch wheel device (10)；The riding wheel apparatus (12) fixes on the ground, is rotary shaft
Rolling bearing support roller group, including 4 support rollers and 2 runners (13), symmetrical two groups before and after being divided into, every group exists in runner (13) again
In, support roller be symmetrical set in runner (13) both sides, the rolling ring that runner (13) is set with cylinder (7) left and right two parts outer wall
(16) it is rotatablely connected；The catch wheel device (10) is conical surface catch wheel device, frustoconical bevel angle≤2 degree, the angle of inclination one with cylinder
Cause, be arranged between 2 runners (13) in left side.
9. chromium depleted zone coarse grain wet type pre-selecting tailings discharging system according to claim 7, it is characterised in that：The wet type
The motor (1) of beater is variable-frequency motor；The stock guide (15) is spiral stock guide；The gear ring cover (6) is semiclosed knot
Structure；Gear wheel assembles (5) and is arranged on latch plate on cylinder (7).
10. chromium depleted zone coarse grain wet type pre-selecting tailings discharging system according to claim 8, it is characterised in that：It is described wet
Gear wheel assembling (5) gear engagement place of formula beater sets peep hole；The rolling ring (16) makes for hard rubber material.
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| CN108296011A (en) * | 2018-02-11 | 2018-07-20 | 中冶北方（大连）工程技术有限公司 | A kind of technique improving one section of closed circuit grinding treating capacity of magnetic iron ore |
| CN108672082A (en) * | 2018-07-05 | 2018-10-19 | 鞍钢集团矿业有限公司 | Magnetic iron ore high pressure roller mill-wet type pre-selecting-stage grinding-tower grinds magnetic separation process |
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| CN109465105A (en) * | 2018-12-03 | 2019-03-15 | 马钢集团矿业有限公司 | Tail is thrown in a kind of circulation dissociation of iron ore ultrafine grinding and tailing recycles technique |
| CN111036390A (en) * | 2019-08-29 | 2020-04-21 | 舞钢中加矿业发展有限公司 | Beneficiation method for magnetic separation mixed ore by wet pre-concentration method before storage |
| CN114853420A (en) * | 2022-05-10 | 2022-08-05 | 中冶沈勘工程技术有限公司 | Process method for recovery and comprehensive utilization of iron-containing tailings pond |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111036390A (en) * | 2019-08-29 | 2020-04-21 | 舞钢中加矿业发展有限公司 | Beneficiation method for magnetic separation mixed ore by wet pre-concentration method before storage |
| CN114853420A (en) * | 2022-05-10 | 2022-08-05 | 中冶沈勘工程技术有限公司 | Process method for recovery and comprehensive utilization of iron-containing tailings pond |
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Effective date of registration: 20180823 Address after: 243000 No. 3 Taibai Road, Ma'anshan economic and Technological Development Zone, Anhui Applicant after: Masteel Design & Research Institute Co., Ltd. Address before: 243000 No. 1889 Taibai Road, Ma'anshan economic and Technological Development Zone, Anhui Applicant before: ANHUI MASTEEL ENGINEERING & TECHNOLOGY GROUP CO., LTD. |
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