CN106733141B - A kind of compound poor iron ore pre-selection production system - Google Patents
A kind of compound poor iron ore pre-selection production system Download PDFInfo
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Abstract
The invention discloses a kind of compound poor iron ores to preselect production system, belongs to technical field of beneficiation.A kind of compound poor iron ore of the invention preselects production system, step include compound poor iron ore it is broken → sieve fully closed road ultrafine grinding technique using high pressure roller mill and be crushed to the muck product of upper step and enter the tailing of subsequent ball milling sorting operation → intensity magnetic separator after Φ 3mm → wet type low intensity magnetic separation is mixed with wet high-intensity magnetic separation process integration → concentrate of weak magnetic separator and the concentrate of intensity magnetic separator and enter linear vibrating screen II and be dehydrated.A kind of compound poor iron ore of the invention preselects production system, including high-pressure roller mill, Wet-type high-efficient beater, linear vibrating screen I, weak magnetic separator, intensity magnetic separator and linear vibrating screen II, and is successively distributed in production line by process sequence.Compound poor iron iron ore, which may be implemented, in the present invention can largely abandon qualified tailings before entering mill, reduce the purpose for into mill amount, sufficiently realizing " much broken and lessmill early throws early lose ".
Description
The present patent application is divisional application, parent application number: 2015101496121；A kind of female case title: compound poor iron ore
Stone preselects new process and its production system；Parent application day: 2015/3/30.
Technical field
The invention belongs to technical field of beneficiation, and in particular to a kind of compound poor iron ore pre-selection production system is particularly suitable for
In middle-low grade (Iron grade≤30%) magnetic iron ore.
Background technique
It is energy-saving, it is exactly energy saving, reduction consumption, goes to obtain maximum economic benefit with least investment.Energy conservation
Consumption reduction has become the fundamental state policy in China, and China is guidance with the Scientific Outlook on Development, accelerates development modern energy industry, adheres to
The fundamental state policy for economizing on resources and protecting environment is placed on industrialization, modernization building a resource-conserving and environment-friendly society
The prominent position of development strategy, make great efforts enhancing the capability of sustainable development, build innovation-oriented country, continue as development of world economy and
Prosperity makes bigger contribution.China has entered energy-efficient society at present, and energy cost is higher and higher, and mining industry is China
The biggish industry of energy consumption, this requires barghs according to itself different condition and Ore performance, starts with from slight part, looks for
Energy-saving key point out, under the premise of guaranteeing beneficiating technology index, comprehensive study simultaneously uses corresponding power-saving technology, sets
Standby and technique, cost efficiency.
The average Iron grade of China's raw iron ores only has 33%, 11 percentages lower than the grade of the average iron ore in the whole world
The processing cost of point, iron ore is high, it is necessary to focus on energy saving technique, reduce processing cost.Compound poor iron ore refers to main in ore
Wanting iron mineral is magnetic iron ore (Fe3O4) and bloodstone (Fe2O3), biggish ratio is occupied in China's iron ore-deposit, as Anhui six is pacified
All oil mills in Huoqiu area and collection iron ore again, week collection iron ore-deposit, Wuhan Da Ye Iron Mine, species abundance in Baosteel in Shanghai meishan iron mine, have been visited
Bright reserves have more than 20 hundred million tons.The domestic process flow for handling such iron ore at present are as follows: crushing-ore system is using conventional three sections
One closed circuit technique sorts broken particle size reduction to Φ 12mm hereinafter, then carrying out ore grinding again.There are energy consumptions for this technique
The outstanding problems such as the problems such as height, ball-mill steel consumption are high, and fine tailings amount is big, causes overall cost high, and tailings discharging needs expropriation of land more.
In recent years, the country has introduced high-pressure roller mill, which is a kind of novel energy saving disintegrating apparatus, first in China
Step realizes production domesticization, and selects factory to use successively in China's metal mine.Currently, domestic magnet mine concentration (such as Ma Gang and
The dressing plant Shang Qiao, the Fujian dressing plant Xin Yang, the dressing plant Qin Huangshouqin Dao Longhui etc.), nonferrous metal mine dressing plant (Sanming, Fujian Province
Cheat tungsten ore, Shaanxi Jin Duicheng molybdenum ore in row Lip river) etc. successfully use, played important function for the energy-saving of China's metal mine.
Therefore high pressure roller mill can be made full use of to realize much broken and lessmill, and selects to be suitable for that subsequent coarse grain magnetic iron ore and bloodstone sort
Condition.
" the Combination iron ore dressing technique " that mineral engineering in December, 2012 is reported, using " ore grinding+weak magnetic+strong
Magnetic " sorting process；It is recorded according to " modern iron ore dressing " (publishing house, China Science & Technology University, 2009.10), domestic current needle
The technique for having dry high-magnetic separation rough polishing tail to hematite separation factory, feeding granularity is substantially the granularity of product fine crushing, is thrown
The amount of tail is less (such as Ma Gang gushan iron mine dressing plant).
The research of above country's Complex iron ore and Practice of Beneficiation, are all made of conventional ore crushing technique, do not implement ultrafine grinding
And pre-selection technique, there are the high problems of energy consumption；And due to implement mill select sorting process, tailing amount is big, there is also effect on environment compared with
The problems such as big.
Chinese Patent Application No.: 201010261670.0, publication date: the patent document of 2011-11-30 discloses one kind
Three section one closed circuit two sections preselect broken new process, and steps are as follows: raw ore feeding primary mill being crushed, discharge enters a Duan Zhen
Dynamic sieve classification, oversize enter one section of magnetic pulley, are crushed crusher machine in the concentrate entrance that one section of magnetic pulley sub-elects, sub-elect
Barren rock enter refuse bin, the product of middle crusher enters two sections of vibrating screens together with the undersize of one section of vibrating screen, two sections
The oversize of vibrating screen enters two sections of magnetic pulleys, and the barren rock that two sections of magnetic pulleys sub-elect enters refuse bin, two sections of magnetic pulleys point
The concentrate selected enters type fine disintegrating machine and is crushed, and the product of the broken product of type fine disintegrating machine and middle crusher is combined into two sections of vibrations
Sieve classification, the undersize of two sections of vibrating screens enter dry-type magnetic extractor, and the concentrate of dry-type magnetic extractor is that final products are sent into mill choosing,
Its barren rock sub-elected enters refuse bin.Using the new process of the invention, barren rock is rejected to the maximum extent before ore grinding, can subtract
Enter ore grinding amount less.But the particulate in the coarse grain of the patent application case dry type magnetic pulley can not sort, relatively low for head grade
Magnetic mine for be still unable to satisfy ore grinding Beneficiation Feed Grade, cause the gangue in broken ore to enter ore grinding, increase
Ore dressing expense.
Summary of the invention
1. technical problems to be solved
For in the prior art for energy consumption height, tailing amount in compound poor iron iron ore pre-selection technique greatly and in ore
Gangue sorts not thorough enough problem, and the present invention provides a kind of compound poor iron ores to preselect production system.It may be implemented multiple
It closes poor iron iron ore and can largely abandon qualified tailings before entering mill, reduce into mill amount, sufficiently " much broken and lessmill, early throwing are early for realization
Lose " purpose, and finally realize the power consumption of ore-dressing technique and being effectively reduced for material consumption, reduce production cost, reduce solid
The discharge of waste promotes economic benefit.
2. technical solution
In order to achieve the above objectives, technical solution of the present invention carries out in the following manner:
A kind of compound poor iron ore pre-selection production system, including high-pressure roller mill, Wet-type high-efficient beater, linear vibrating screen
I, weak magnetic separator, intensity magnetic separator and linear vibrating screen II, and be successively distributed in production line by process sequence；
Wherein: the production line processing step are as follows:
A, the shattering process of compound poor iron ore uses two sections or three section of one closed circuit technique, by the muck control of product in Φ
20mm or less；
B, fully closed road ultrafine grinding technique is sieved using high pressure roller mill and the muck product of step A is crushed to Φ 3mm: by muck
Φ 20mm product enters high-pressure roller mill, and the ore discharge product of high-pressure roller mill enters linear vibrating screen I and carries out wet screening, on sieve
High-pressure roller mill is returned after product and muck product mix carries out secondary operation；
C, wet type low intensity magnetic separation and wet high-intensity magnetic separation process integration: the undersize of the high-pressure roller mill of step B enters weak magnetic
Machine is selected to carry out wet type low intensity magnetic separation, the tailing of weak magnetic separator enters back into intensity magnetic separator and carries out wet high-intensity magnetic separation；
D, enter subsequent ball milling sorting operation after the mixing of the concentrate of the concentrate of weak magnetic separator and intensity magnetic separator, complete compound
The pre-selection of poor iron ore；
E, after the solid concentration that the tailing of intensity magnetic separator enters the dehydration of linear vibrating screen II to oversize is not less than 85%,
It is transported to stockyard by sealing-tape machine as building material product, sieves lower ore pulp and enter Tailings Dam.
It is not thorough, unevenly since the beater of the prior art exists to break up, is not suitable for the ore discharge of high-pressure roller mill
Pie material, inventor improve the beater of the prior art, Wet-type high-efficient beater used in present invention process include cylinder,
Power device and transmission device, power device fix on the ground, including motor, speed reducer and shaft coupling, are driven in continous way
Connection；Cylinder includes feed end and discharge end, is arranged in feed end in tilting of the upper, discharge end under；Cylinder body outer wall setting
Gear ring cover, interior wall liner rubber lining, and fixed with rivet, prolong the fixed stock guide of rubber lining inner ring contour；Transmission device includes
Gear wheel assembly and the pinion gear for engaging connection with gear wheel assembly are assembled；Speed reducer assembled by shaft coupling and pinion gear and
Gear wheel assembly transmission connection；Gear wheel assembly is used cooperatively with gear ring cover.
For the production effect for further increasing Wet-type high-efficient beater, Wet-type high-efficient beater used in present invention process is also
Including riding wheel apparatus and catch wheel device；Riding wheel apparatus fixes on the ground, is rotary shaft rolling bearing support roller group, including 4 supports
Wheel and 2 runners, be divided into front and back it is symmetrical two groups, every group be in again runner in, support roller be symmetrical set in runner two sides, turn
The rolling ring of wheel and cylinder or so two parts outer wall setting is rotatablely connected；Catch wheel device is conical surface catch wheel device, frustoconical bevel angle≤2
Degree, it is consistent with the tilt angle of cylinder, it is arranged between 2 runners in left side.
For the production effect for further increasing Wet-type high-efficient beater, Wet-type high-efficient beater used in present invention process
Motor is variable-frequency motor；Stock guide is spiral stock guide；Gear ring cover is semi-closed structure；Gear wheel assembly is mounted on latch plate
On cylinder.
For the production effect for further increasing Wet-type high-efficient beater, Wet-type high-efficient beater used in present invention process
Peep hole is arranged in gear wheel assembling gear engagement place；Rolling ring is hard rubber material production.
Preferably, it in step C, through the prolonged technological parameter data acquisition of inventor, research and summarizes, obtains following work
Skill parameter: the magnetic field strength of weak magnetic separator is the pulp solids weight concentration of 199.04~238.85kA/m, weak magnetic wet magnetic separation
Magnetic induction intensity for 35%, intensity magnetic separator is 1.0T, the diameter of stick medium is 3mm, strong magnetic wet magnetic separation pulp solids weight
Concentration is 30%；
Preferably, in step C, intensity magnetic separator is vertical ring pulsation intensity magnetic separator, can effectively improve the grade of mill iron ore
And substantially reduce mine amount into mill iron ore；In step E, in order to which the tailing to intensity magnetic separator is effectively classified, straight-line oscillation
The sieve gap of sieve II is 0.5mm.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
(1) a kind of compound poor iron ore of the invention preselects production system, and it is super to implement high pressure roller mill to compound poor iron ore
Technique fine crushing.The comparison country is all made of the garrulous ore granularity of the economical rationality of conventional Three stage crushing with single closed circuit stage to Complex iron ore at present
Muck product is crushed to Φ 3mm using high-pressure roller mill by generally Φ 12mm, the present invention, is created for subsequent weak magnetic high magnetic pre-selection
Condition；Since high-pressure roller mill is crushed using static pressure, there is micro-crack between ore, the grindability of ore can be effectively improved
Can, high pressure roller mill equipment has the effect of energy-saving as ultrafine grinding equipment；The present invention also uses magnetic in compound iron ore
The physical characteristic of iron ore and bloodstone is preselected: it is strong can to shift to an earlier date fetching portion after weak magnetic wet separation compound iron ore
Magnetic separation mineral magnetic iron ore, and throwing tail is realized with intensity magnetic separator, the grade into mill iron ore is improved, is reduced into mill iron ore
Mine amount；
(2) a kind of compound poor iron ore of the invention preselects production system, prolonged research and summary through inventor,
3~5MPa of roll surface pressure of high-pressure roller mill, the excessively high waste that will cause resource is too low, reaches to the processing of compound poor iron ore
It is required to technique；Iron roll gap is 15mm and charging specification is adapted；
(3) a kind of compound poor iron ore of the invention preselects production system, and the application of Wet-type high-efficient beater improves whole
The production efficiency of a invented technology；
(4) a kind of compound poor iron ore of the invention preselects production system, processing high-pressure roller mill pie ore discharge product
The mating reaction of Wet-type high-efficient beater middle cylinder body, power device and transmission device is coupled by motor by shaft coupling, speed reducer
Pinion gear assembly drives gear wheel assembly of the rivet clasp on cylinder, to drive barrel body rotation；High-pressure roller mill pie product into
After entering in cylinder, suitable water is added, has rubber lining in cylinder, has stock guide on liner plate, because the tilting of cylinder rotates, leads
Material is constantly risen and is left with the rotation of cylinder by flitch, while stock guide is cracking that water is sent in cylinder, so that object
Material more uniform distribution on the intracorporal cross section of cylinder scatters, and material is gradually moved to discharge end in stock guide and during leave
Dynamic, until discharge cylinder, completion is entirely impregnated and breakdown process；Wet screening is carried out for subsequent line vibrating screen I to lay well
Basis；
(5) a kind of compound poor iron ore of the invention preselects production system, processing high-pressure roller mill pie ore discharge product
Wet-type high-efficient breaks up that machine equipment is light, with low investment, and power is small, wear-resisting, operating cost is low；Device structure is simple, novel, and configuration is tight
It gathers, rationally, processing capacity is big, and it is easy to operate, it is reliable for operation, into screening plant plus water system can be reduced using the beater
Link is starched, subsequent wet screening efficiency can be greatly improved；
(6) a kind of compound poor iron ore of the invention preselects production system, reduces pollution of the solid waste to environment；
Tailing is dehydrated by straight line shaker, construction material sale is can be used as on sieve, reduces the discharge of solid waste；And conventional
Mill selects tailing since granularity is thinner, the stockpiling of the Tailings Dam that need to usually discharge, this not only landed property, there is also the safety of Tailings Dam
Hidden danger；
(7) a kind of compound poor iron ore of the invention preselects production system, and II sieve gap of linear vibrating screen is in step E
0.5mm had not only sub-elected building material product and had been wasted with recycling and avoiding, but also reduced tailing amount as far as possible to land area
Occupancy and pollution environment；
(8) a kind of compound poor iron ore of the invention preselects production system, the application of Wet-type high-efficient beater, to entire raw
The production efficiency of production. art improves 20% or more；
(9) a kind of compound poor iron ore of the invention preselects production system, treated compound poor iron ore, throws the production of tail
Rate reaches 23% or more, and iron content throws tail less than 6%, enters to grind head grade at least and can be improved 7 percentage points.
Detailed description of the invention
Fig. 1 is the yield of compound poor iron ore in the process flow of the embodiment of the present invention 1, iron recovery and Iron grade
Change procedure figure；
Fig. 2 is the Wet-type high-efficient beater structural schematic diagram used in the technical process of the embodiment of the present invention 2；
Fig. 3 is the top view of Fig. 2 (after removing cylinder)；
Fig. 4 is that Fig. 2A-A locates sectional view.
In figure: 1- motor, 2- speed reducer, 3- shaft coupling, the assembly of 4- pinion gear, the assembly of 5- gear wheel, 6- gear ring cover, 7-
Body, 8- feed end, 9- discharge end, 10- catch wheel device, 11- pedestal, 12- riding wheel apparatus, 13- runner, 14- rubber lining, 15-
Stock guide, 16- rolling ring.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in detail.
Embodiment 1
To further describe the present invention, the invention will be further described with example with reference to the accompanying drawing:
Sample ore in this example is derived from Anhui Huoqiu Zhou Ji iron ore compound iron ore, and raw ore multielement and Fe clusters are analyzed
As a result it see the table below 1, table 2.
Sample multielement analysis result table 1
| Element | TFe | SFe | FeO | S | P |
| Content (%) | 29.09 | 17.29 | 8.12 | 0.069 | 0.034 |
| Element | CaO | MgO | SiO2 | Al2O3 | Caustic soda |
| Content (%) | 1.86 | 1.39 | 46.20 | 3.23 | 2.07 |
Sample Fe clusters analyze result table 2
| Mineral name | Content (%) | Ratio (%) |
| Magnetic iron ore | 14.09 | 48.44 |
| Martite | 3.20 | 11.00 |
| Hematite-limonite | 4.10 | 14.09 |
| Ferric carbonate | 0.48 | 1.65 |
| Ferrosilite | 7.12 | 24.48 |
| Pyrite | 0.10 | 0.34 |
| It is total | 29.09 | 100.00 |
Can be seen that all iron content in the iron mineral of sample from Tables 1 and 2 analysis result is 29.09%, is belonged to compound poor
Iron ore, wherein magnetic iron content is the 59.44% of 17.29%, Zhan Quantie, it is secondly ferrosilite, content 7.12%, Zhan Quan
The 24.48% of iron.Objectionable impurities sulphur, the content of phosphorus are lower in ore, but the content of silicon is higher, belong to acid iron ore.
A kind of compound poor iron ore pre-selection production system of the present embodiment handles the compound poor iron ore, the steps include:
A, the shattering process of compound poor iron ore uses two sections or three section of one closed circuit technique, by the muck control of product in Φ
20mm or less；
B, as shown in Figure 1, sieving fully closed road ultrafine grinding technique using high pressure roller mill is crushed to Φ for the muck product of step A
3mm: entering high-pressure roller mill for muck Φ 20mm product, the ore discharge product of high-pressure roller mill enter linear vibrating screen I carry out it is wet
Formula screening, oversize carry out secondary operation with return high-pressure roller mill after muck product mix；High-pressure roller mill is Ma'an Mountain
Φ 8000 × 2500mm high-pressure roller mill of Green's environmental protection company production, roll surface pressure are 4MP, and roll surface speed is 0.8m/s, roller
Gap is 15mm.The sieve pore of linear vibrating screen I is 3mm.
C, wet type low intensity magnetic separation and wet high-intensity magnetic separation process integration: the undersize of the high-pressure roller mill of step B enters weak magnetic
Machine is selected to carry out wet type low intensity magnetic separation；Wet type weak magnetic separation equipment is that 4000 × 6000 drum type wet type of Φ of Wuhan mine locating machinery plant production is weak
Magnetic separator, pulp solids weight concentration are 35%；Magnetic field strength is 199.04kA/m；After wet type low intensity magnetic separation, sample detection, inspection
Survey the results are shown in Table 3；
Testing result table 3 after low intensity magnetic separation
Seen from table 3, after low intensity magnetic separation, the yield of concentrate is that 40.75%, TFe (Quan Tie) grade is 41.32%；Weak magnetic
The TFe grade 20.91% of tailing, the ingredient of iron is mainly low intensity magnetic separation mineral bloodstone in tailing.
The tailing of weak magnetic separator enters back into intensity magnetic separator and carries out wet high-intensity magnetic separation: strong magnetic machine used in the present embodiment is
The SLon-1000 of Ganzhou Jin Huan company production founds ring pulsating high gradient intensity magnetic separator, and background magnetic induction field strength is 1.0T, sorting
Medium Ф 3mm stick medium, the ore pulp weight concentration 30% of sorting, change revolving speed are 120rpm.After high intensity magnetic separation, sample detection, inspection
Survey condition and result are as shown in table 4 below.
Testing result table 4 after high intensity magnetic separation
In summary testing result, the undersize after high pressure roller mill, after linear vibrating screen I carries out wet screening
After carrying out weak magnetic high intensity magnetic separation under the process conditions of setting, the tailing of tail 23.78% can be effectively thrown, TFe grade only has
5.99%；Inferior fine magnetite concentrate and the mixed concentrate TFe grade of high intensity magnetic separation concentrate are 36.34%, are improved than selected head grade
7.25 percentage point.It summarizes testing result and is shown in Table 5.
The strong magnetic of weak magnetic-throws testing result table 5 after tail
D, enter subsequent ball milling sorting operation after the mixing of the concentrate of the concentrate of weak magnetic separator and intensity magnetic separator, complete compound
The pre-selection of poor iron ore；
E, after the solid concentration that the tailing of intensity magnetic separator enters the dehydration of linear vibrating screen II to oversize is not less than 85%,
It is transported to stockyard by sealing-tape machine as building material product, sieves lower ore pulp and enter Tailings Dam.The sieve gap of linear vibrating screen II is
0.5mm。
If the annual amount for the treatment of of Anhui Huoqiu Zhou Ji iron ore design is 5,000,000 t, 118.9 ten thousand t of tail are thrown before annual mill, often
Year economize on electricity 2140.2 ten thousand kWh, annual saving steel ball 130t are equivalent to 21,500,000 yuan of operating cost of year saving.Furthermore coarse grain is abandoned
Tailing is dehydrated through linear vibrating screen II, and oversize accounts for the 70% of tailing total amount, and solid concentration reaches 85%, can be used as Building wood
Expect that (yellow ground) is sold, reduces the tailing amount into Tailings Dam, the discharge of the reduction waste reached.It can be seen that the one of the present embodiment
The compound poor iron ore pre-selection production system of kind has achieved the effect that energy-saving and emission-reduction.
Embodiment 2
In the step B of embodiment 1, since the ore discharge product of high-pressure roller mill is pie material, it is directly entered straight-line oscillation
Sieve I carries out wet screening, and since vibrating screen is not by the effect of material scattering, pie material is difficult to sieve, and causes entirely to produce
Production efficiency is not high.
A kind of compound poor iron ore of the present embodiment preselects production system, and with embodiment 1, difference exists processing step
In: the production efficiency in order to improve entire technique, pie material first pass through Wet-type high-efficient beater and break up.
Wet-type high-efficient beater used in a kind of compound poor iron ore pre-selection production system of the present embodiment, as shown in Fig. 2,
Including cylinder 7, power device and transmission device, the power device is fixed on the ground, including motor 1, speed reducer 2 and shaft coupling
Device 3 is sequentially connected in continous way；The cylinder 7 include feed end 8 and discharge end 9, in feed end 8 in upper, discharge end 9 under
Tilting setting；Gear ring cover 6 is arranged in 7 outer wall of cylinder, as shown in figure 4, interior wall liner rubber lining 14, prolongs 14 inner ring of rubber lining
Contour fixes stock guide 15；The transmission device includes that gear wheel assembly 5 and the pinion gear for engaging connection with gear wheel assembly 5 fill
With 4；The speed reducer 2 passes through shaft coupling 3 and pinion gear assembly 4 and 5 transmission connection of gear wheel assembly；Gear wheel assembly 5 with
Gear ring cover 6 is used cooperatively.
A kind of compound poor iron ore of the present embodiment preselects production system, handles the wet of high-pressure roller mill pie ore discharge product
The mating reaction of formula efficient beater middle cylinder body 1, power device and transmission device passes through shaft coupling 3, speed reducer 2 by motor 1
The gear wheel assembly 5 that pinion gear assembly 4 drives rivet clasp on cylinder is connect, so that cylinder 7 be driven to rotate；High-pressure roller mill pie produces
After product enter in cylinder 7, suitable water is added, has rubber lining 14 in cylinder, there is stock guide 15 on liner plate, because of inclining for cylinder 7
Inclined rotation, material is constantly risen and is left with the rotation of cylinder 7 by stock guide 15, while stock guide 15 is cracking by water
It is sent in cylinder, so that material more uniform distribution on the intracorporal cross section of cylinder scatters, material is in stock guide 15 and leaves process
In it is gradually mobile to discharge end, until discharge cylinder 7, complete entire impregnate and breakdown process；For the progress of subsequent line vibrating screen I
Wet screening is laid a good foundation.
It is other the difference is that: the roll surface pressure 5Pa of high-pressure roller mill；The magnetic field strength of magnetic separator is 218kA/m.
By measuring and calculating, a kind of compound poor iron ore pre-selection production system of the present embodiment is relative to embodiment 1, due to application
Wet-type high-efficient beater, can improve production efficiency 20%.
A kind of compound poor iron ore of the present embodiment preselects production system, including high-pressure roller mill, Wet-type high-efficient beater,
Linear vibrating screen I, weak magnetic separator, intensity magnetic separator and linear vibrating screen II, and be successively distributed in production line by process sequence.
Embodiment 3
A kind of compound poor iron ore of the present embodiment preselects production system, and with embodiment 2, difference exists processing step
In: as shown in figure 3, used Wet-type high-efficient beater further includes riding wheel apparatus 12 and catch wheel device 10；The riding wheel apparatus
12 fix on the ground, are rotary shaft rolling bearing support roller group, including 4 support rollers and 2 runners 13, are divided into front and back symmetrical two
Group, every group be in again runner 13 in, support roller be symmetrical set in 13 two sides of runner, outside runner 13 and 7 or so two parts of cylinder
The rolling ring 16 of wall setting is rotatablely connected, and to bear the weight of entire rotary body and material, the symmetrical expression of support roller 13 and runner 13 is matched
It closes and uses, structure is simple, easy to maintenance, and frictional resistance is smaller；The catch wheel device 10 be conical surface catch wheel device, frustoconical bevel angle≤
It is 2 degree, consistent with the tilt angle of cylinder, it is arranged between 2 runners 13 in left side, the axial position of rotary body is avoided to be difficult to really
Periodically, to limit axial float of the cylinder 7 in rotation；Motor 1 is variable-frequency motor, and frequency control can adjust 7 revolving speed of cylinder
With the material speed of service, it can be effectively controlled and break up effect；The stock guide 15 be spiral stock guide, make water and material impregnate and
Drop middle flow of slurry is stable, material cake decompose it is fast；The gear ring cover 6 is semi-closed structure, convenient for observing the work of latch plate
Situation, and be conducive to the heat dissipation of gear ring；Gear wheel assembly 5 is mounted on cylinder 7 with latch plate, and latch plate plays buffering gravity
Effect avoids the hard engagement of gear wheel assembly and pinion gear assembly, improves its service life；Gear wheel 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 is hard rubber material production,
Vulcanie rolling ring avoids intermetallic contact, has not only played buffering left and right, but also reduce frictional resistance.
It is other the difference is that: the roll surface pressure 3MPa of high-pressure roller mill；The magnetic field strength of magnetic separator is 238.85kA/
m。
A kind of compound poor iron ore pre-selection production system of the present embodiment is relative to embodiment 2, due to improving wet type height
Beater is imitated, production efficiency 28% can be improved.
A kind of compound poor iron ore of the present embodiment preselects production system, including high-pressure roller mill, Wet-type high-efficient beater,
Linear vibrating screen I, weak magnetic separator, intensity magnetic separator and linear vibrating screen II, and be successively distributed in production line by process sequence.
Schematically the invention and embodiments thereof are described above, description is not limiting.So
If those of ordinary skill in the art are inspired by it, in the case where not departing from this creation objective, not inventively design
Frame mode similar with the technical solution and embodiment out, should belong to the protection scope of this patent.
Claims (5)
1. a kind of compound poor iron ore preselects production system, it is characterised in that: including high-pressure roller mill, Wet-type high-efficient beater,
Linear vibrating screen I, weak magnetic separator, intensity magnetic separator and linear vibrating screen II, and be successively distributed in production line by process sequence；
Wherein: the production line processing step are as follows:
A, the shattering process of compound poor iron ore use two sections or three section of one closed circuit technique, by the muck control of product Φ 20mm with
Under；
B, fully closed road ultrafine grinding technique is sieved using high pressure roller mill and the muck product of step A is crushed to Φ 3mm: by muck Φ
20mm product enters high-pressure roller mill, and the ore discharge product of high-pressure roller mill first passes through after Wet-type high-efficient beater breaks up, and enters back into
Linear vibrating screen I carries out wet screening, returns to high-pressure roller mill after oversize and muck product mix and carries out secondary operation；It is high
Roll surface 3 ~ 5MPa of pressure of pressure roller grinding machine, roller gap are 15mm；The sieve pore of the linear vibrating screen I is 3mm；
C, wet type low intensity magnetic separation and wet high-intensity magnetic separation process integration: the undersize of the high-pressure roller mill of step B enters weak magnetic separator
Wet type low intensity magnetic separation is carried out, the tailing of weak magnetic separator enters back into intensity magnetic separator and carries out wet high-intensity magnetic separation；
D, enter subsequent ball milling sorting operation after the mixing of the concentrate of the concentrate of weak magnetic separator and intensity magnetic separator, complete compound poor iron
The pre-selection of ore；
E, after the solid concentration that the tailing of intensity magnetic separator enters the dehydration of linear vibrating screen II to oversize is not less than 85%, by glue
Band machine is transported to stockyard as building material product, is sieved lower ore pulp and is entered Tailings Dam；
The Wet-type high-efficient beater includes cylinder (7), power device, transmission device, riding wheel apparatus (12) and catch wheel device
(10), the power device fixes on the ground, including motor (1), speed reducer (2) and shaft coupling (3), connects in continous way transmission
It connects；The cylinder (7) includes feed end (8) and discharge end (9), is in the tilting of feed end (8) in upper, discharge end (9) under
Setting；Gear ring cover (6) are arranged in cylinder (7) outer wall, interior wall liner rubber lining (14), lead along the fixation of rubber lining (14) inner ring contour
Flitch (15)；The transmission device includes gear wheel assembly (5) and engages the pinion gear assembly of connection with gear wheel assembly (5)
(4)；The speed reducer (2) passes through shaft coupling (3) and pinion gear assembly (4) and gear wheel assembly (5) transmission connection；Gear wheel
Assembly (5) is used cooperatively with gear ring cover (6)；
The step of Wet-type high-efficient beater is broken up are as follows: high-pressure roller mill pie ore discharge product cylinder in Wet-type high-efficient beater
Under the mating reaction of body (7), power device and transmission device, small tooth is coupled by shaft coupling (3), speed reducer (2) by motor (1)
Wheel assembly (4) drives gear wheel of the rivet clasp on cylinder to assemble (5), so that cylinder (7) be driven to rotate；High-pressure roller mill pie produces
After product enter in cylinder (7), suitable water is added, has in cylinder rubber lining (14), there are stock guide (15) on liner plate, because of cylinder
(7) tilting rotation, material is constantly risen and is left with the rotation of cylinder (7) by stock guide (15), while stock guide
(15) cracking that water is sent in cylinder, so that material more uniform distribution on the intracorporal cross section of cylinder scatters, material is being left
Gradually mobile to discharge end in the process, until discharge cylinder (7), completion is entirely impregnated and breakdown process；
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), be divided into front and back it is symmetrical two groups, every group be in again runner (13) in, support roller be symmetrical set in runner (13) two sides,
The rolling ring (16) of runner (13) and the setting of cylinder (7) left and right two parts outer wall is rotatablely connected；The catch wheel device (10) is the conical surface
Catch wheel device, frustoconical bevel angle≤2 degree are consistent with the tilt angle of cylinder, are arranged between 2 runners (13) in left side.
2. compound poor iron ore according to claim 1 preselects production system, it is characterised in that: the Wet-type high-efficient is broken up
The motor (1) of machine is variable-frequency motor；The stock guide (15) is spiral stock guide；The gear ring cover (6) is semi-closed structure；Greatly
Gear assembly (5) is mounted on cylinder (7) with latch plate.
3. compound poor iron ore according to claim 2 preselects production system, it is characterised in that: the Wet-type high-efficient is broken up
Peep hole is arranged in gear wheel assembly (5) gear engagement place of machine；The rolling ring (16) is hard rubber material production.
4. compound poor iron ore according to claim 1 or 2 preselects production system, it is characterised in that: described in step C
The magnetic field strength of weak magnetic separator be 199.04 ~ 238.85kA/m, the pulp solids weight concentration of weak magnetic wet magnetic separation is 35%；
The magnetic induction intensity of the intensity magnetic separator is 1.0T, and the diameter of stick medium is 3mm, and strong magnetic wet magnetic separation pulp solids weight is dense
Degree is 30%.
5. compound poor iron ore according to claim 4 preselects production system, it is characterised in that: in step C, described is strong
Magnetic separator is vertical ring pulsation intensity magnetic separator；In step E, the sieve gap of the linear vibrating screen II is 0.5mm.
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| CN105032582B (en) * | 2015-08-12 | 2018-10-16 | 中国地质科学院郑州矿产综合利用研究所 | Efficient mineral separation process using high-pressure roller mill and magnetic field screening machine |
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| CN113941441A (en) * | 2021-10-14 | 2022-01-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Wet-type strong magnetic preselection method for low-grade chromite |
| CN114453128A (en) * | 2022-02-10 | 2022-05-10 | 天津瀚磷国际贸易有限公司 | Hematite beneficiation process |
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| CN104722394B (en) | 2017-03-08 |
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