CN102806143A - Screening and magnetic separation system for waste steel and steel slag and screening and magnetic separation method thereof - Google Patents
Screening and magnetic separation system for waste steel and steel slag and screening and magnetic separation method thereof Download PDFInfo
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- CN102806143A CN102806143A CN2012102921153A CN201210292115A CN102806143A CN 102806143 A CN102806143 A CN 102806143A CN 2012102921153 A CN2012102921153 A CN 2012102921153A CN 201210292115 A CN201210292115 A CN 201210292115A CN 102806143 A CN102806143 A CN 102806143A
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Abstract
The invention discloses a screening and magnetic separation system for waste steel and steel slag. The screening and magnetic separation system comprises a mixed material hopper, wherein an efficient vibrating grizzly is arranged above an opening in the upper part of the mixed material hopper; a variable frequency electric vibrating feeder and a belt conveyor are arranged below a material leaking opening in the lower part of the mixed material hopper; the belt conveyor is obliquely arranged; the lower end of the belt conveyor is positioned below the variable frequency electric vibrating feeder and the higher end of the belt conveyor uses an adjustable magnetic core type permanent magnetic roller; a shunt is arranged below the adjustable magnetic core type permanent magnetic roller; the shunt is two funnels, one of which is a fine powder and iron block funnel and the other one of which is a nonmetal funnel; and an electric vibrating screen is arranged below the fine powder and iron block funnel. The invention further discloses a screening and magnetic separation method of the system. Through the adoption of the technical scheme, the traditional steel (iron) slag magnetic separation process and equipment are greatly simplified; the mounting cost is reduced; a very quick effect is achieved; and purposes of increasing production efficiency, reducing labor intensity of a worker and reducing production cost are achieved.
Description
Technical field
The invention belongs to the technical field that metallurgical industry is produced, relate to the treatment technology of steel scrap, slag, more particularly, the present invention relates to the sub-sieve magnetic separation system of a kind of steel scrap, slag.In addition, the invention still further relates to the sub-sieve magnetic selection method of this system.
Background technology
The mixture of iron-holder such as the steel scrap that steel-making, cast tube and other metallurgical production units produce in process of production (iron), slag more than about 40%, and the shape of mixture is not of uniform size, as utilizing again without magnetic separation.
But in the prior art, the slag disposal ability of steel-making portion is limited, can't carry out magnetic separation to this part mixture, thereby causes a large amount of scrap metals to pile up waste.
Summary of the invention
The present invention provides the sub-sieve magnetic separation system of a kind of steel scrap, slag, its objective is the production efficiency that improves steel scrap, slag processing.
To achieve these goals, the technical scheme taked of the present invention is:
The sub-sieve magnetic separation system of steel scrap provided by the present invention, slag, the sub-sieve magnetic separation system of described steel scrap, slag comprises the mixture hopper; Above the upper opening of described mixture hopper, establish the high-efficiency vibration diagrid, frequency conversion type electromagnetic vibration feeder and band conveyor are established in the below of the leakage material mouth of its underpart; Described band conveyor is obliquely installed, and a lower end is positioned at the below of described frequency conversion type electromagnetic vibration feeder, and a higher end adopts adjustable magnetic-core type permanent magnetic pulley; Below described adjustable magnetic-core type permanent magnetic pulley, establish current divider, described current divider is two funnels, and one of them is smart powder, iron block funnel, and another is nonmetal funnel; Below described smart powder, iron block funnel, establish the electric vibrating screen net.
Described electric vibrating screen net is obliquely installed; Below described electric vibrating screen net, establish the refining powder lot bucket, below the lower side outside of described electric vibrating screen net, establish the iron block hopper.
Below described refining powder lot bucket, establish smart powder ribbon conveyer; Below described iron block hopper, establish the iron block ribbon conveyer.
Outside the described mixture hopper upper opening, establish discharging opening, jaw crusher is established in the below of described discharging opening; The next door of described mixture hopper; If belt circulation material conveying machine; Described belt circulation material conveying machine is for being obliquely installed, the below of described jaw crusher, through hopper with mass transport to the lower end of described belt circulation material conveying machine; The higher end of described belt circulation material conveying machine, through hopper with mass transport to material inlet belt conveyor; The discharge end of described material inlet belt conveyor is located at the top of described high-efficiency vibration diagrid.
Described mixture hopper is installed on the steel structure frame; And a plurality of compressed spring type dampers are arranged between the bearing-surface of described steel structure frame and mixture hopper.
Described frequency conversion type electromagnetic vibration feeder is installed on the described steel structure frame through a plurality of Extension Spring-type dampers.
The leakage material mouth of the bottom of described mixture hopper is established manual bulkhgead gate.
The end that described band conveyor is lower is established the adjusting screw mandrel, is connected with the cylinder of band conveyor.
Described smart powder ribbon conveyer, iron block ribbon conveyer near the end, be equipped with the adjusting screw mandrel, be connected with the cylinder of conveyer.
The electrical control part of the sub-sieve magnetic separation system of described steel scrap, slag comprises:
Engineer station, post operation station, netting twine hub, Programmable Logic Controller, master operating station, controller slave station, oscillating feeder frequency converter, belt conveyor frequency converter, vibratory sieve batcher frequency converter;
Described engineer station, post operation station, netting twine hub, Programmable Logic Controller connect through ethernet line;
Described master operating station is connected with Programmable Logic Controller through control signal wire;
Described controller slave station, oscillating feeder frequency converter, belt conveyor frequency converter, vibratory sieve batcher frequency converter are connected with described Programmable Logic Controller through communication bus;
Described controller slave station is connected with the local operation case through control signal wire;
Described oscillating feeder frequency converter is connected with the oscillating feeder motor through control signal wire; Described belt conveyor frequency converter is connected with the belt conveyor motor through control signal wire; Described vibratory sieve batcher frequency converter is connected with vibratory sieve batcher motor through control signal wire;
Described oscillating feeder motor is the drive motors of described frequency conversion type electromagnetic vibration feeder; Described belt conveyor motor is the drive motors of described band conveyor; Described vibratory sieve batcher motor is the drive motors of described electric vibrating screen net.
In order to realize the invention identical with technique scheme, the present invention also provides the sub-sieve magnetic selection method of the sub-sieve magnetic separation system of above-mentioned steel scrap, slag, and the process of described sub-sieve magnetic selection method is:
1, with mixture through material inlet belt conveyor or feed leakage bucket, be transported to the high-efficiency vibration diagrid, through screening, the mixture of diameter≤200mm is leaked into mixture hopper; Send the bulk mixture of diameter>=200mm to the jaw crusher fragmentation through discharging opening, return the high-efficiency vibration diagrid through belt circulation material conveying machine again, get into the mixture hopper;
2, through frequency conversion type electric vibrating feeder and adjustment type buffer, control delivery rate and feeding coal make compound be layered on the band conveyor equably;
With the THICKNESS CONTROL of the compound on the belt in 10mm; Regulate the rotating speed of belt roller through frequency control, the linear velocity that the belt roller of band conveyor is rotated is adjusted into 300mm/s~500mm/s;
3, when compound arrives the position of adjustable magnetic-core type permanent magnetic pulley; Through regulating the magnetic flux of its magnetic core, reach best magnetic separation position, through the current divider of adjustable magnetic-core type permanent magnetic pulley below; With iron-holder 40% (quality) and above smart powder, scrap iron piece, shunt with nonmetallic substance;
4, through the electric vibrating screen net smart powder is separated with the scrap iron piece again;
Smart powder gets into the refining powder lot bucket through the eyelet of electric vibrating screen net, falls then on the belt of smart powder ribbon conveyer;
The scrap iron piece imports the iron block hopper, falls then on the belt of iron block ribbon conveyer;
5, through two band conveyors, respectively smart powder and scrap iron piece are transported to storing district separately.
The present invention adopts technique scheme, and the technology and the equipment of the magnetic separation of traditional steel (iron) slag are simplified greatly, reduces installation cost; It is very fast to take effect, and has reached and has improved production efficiency, has reduced worker's labour intensity, has reduced the production cost purpose.
Description of drawings
The mark of facing down among expressed content of each width of cloth accompanying drawing of this specification and the figure briefly explains:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the schematic top plan view of structure shown in Figure 1;
Fig. 3 is the category filter structural representation among the present invention;
Fig. 4 is the electric system structural representation among the present invention.
Be labeled as among Fig. 1 to Fig. 3:
1, high-efficiency vibration diagrid, 2, discharging opening, 3, the mixture hopper, 4, the frequency conversion type electromagnetic vibration feeder; 5, band conveyor, 6, adjustable magnetic-core type permanent magnetic pulley, 7, current divider, 8, the electric vibrating screen net; 9, smart powder ribbon conveyer, 10, the iron block ribbon conveyer, 11, steel structure frame, 12, the compressed spring type damper; 13, Extension Spring-type damper, 14, regulate leading screw, 15, manual bulkhgead gate, 16, jaw crusher; 17, material inlet belt conveyor, 18, belt circulation material conveying machine, 19, the refining powder lot bucket, 20, the iron block hopper.
Being labeled as among Fig. 4:
1, engineer station, 2, the post operation station, 3, ethernet line, 4, Programmable Logic Controller; 5, controller slave station, 6, the oscillating feeder frequency converter, 7, the belt conveyor frequency converter, 8, vibratory sieve batcher frequency converter; 9, communication bus, 10, control signal wire, 11, the oscillating feeder motor, 12, the belt conveyor motor; 13, vibratory sieve batcher motor, 14, master operating station, 15, the local operation case, 16, the netting twine hub.
The specific embodiment
Contrast accompanying drawing below, through the description to embodiment, specific embodiments of the invention is done further detailed explanation, to help those skilled in the art inventive concept of the present invention, technical scheme is had more complete, accurate and deep understanding.
The following stated is the expressed structure of the present invention of Fig. 1, Fig. 2 and Fig. 3, is the sub-sieve magnetic separation system of a kind of steel scrap, slag.
In order to solve the problem that prior art exists and to overcome its defective, realize improving the goal of the invention of the production efficiency that steel scrap, slag handle, the technical scheme that the present invention takes is:
Extremely shown in Figure 3 like Fig. 1, the sub-sieve magnetic separation system of steel scrap provided by the present invention, slag, the sub-sieve magnetic separation system of described steel scrap, slag comprises mixture hopper 3; Above the upper opening of described mixture hopper 3, establish high-efficiency vibration diagrid 1, frequency conversion type electromagnetic vibration feeder 4 and band conveyor 5 are established in the below of the leakage material mouth of its underpart; Described band conveyor 5 is obliquely installed, and a lower end is positioned at the below of described frequency conversion type electromagnetic vibration feeder 4, and a higher end adopts adjustable magnetic-core type permanent magnetic pulley 6; Below described adjustable magnetic-core type permanent magnetic pulley 6, establish current divider 7, described current divider 7 is two funnels, and one of them is smart powder, iron block funnel, and another is nonmetal funnel; Below described smart powder, iron block funnel, establish electric vibrating screen net 8.
Adjustable magnetic-core type permanent magnetic pulley 6 is installed in the exit side with band conveyor 5 belts; Current divider 7 is installed in the below; According to the position of current divider 7, magnetic core is adjusted to the optimum position, principle is that nonmetal material (iron-holder about 40% below) is separated with metal charge.
In a side that distributes metal charge electric vibrating screen net 8 is installed.The order number of screen cloth customizes according to technological requirement, and purpose is that smart powder that supplies sintering and the heavy scrap that supplies steel-making usefulness are shunted out.
Described electric vibrating screen net 8 is obliquely installed; Below described electric vibrating screen net 8, establish refining powder lot bucket 19, below the lower side outside of described electric vibrating screen net 8, establish iron block hopper 20.
Below described refining powder lot bucket 19, establish smart powder ribbon conveyer 9; Below described iron block hopper 20, establish iron block ribbon conveyer 10.
Just smart powder ribbon conveyer 9 is installed in the below of electric vibrating screen net 8, will supplies the smart powder of sintering to transfer to a side and pile up.Iron block ribbon conveyer 10 is installed in the outlet side of electric vibrating screen net 8, will supplies steel-making to transfer to opposite side and pile up with heavy scrap.
Outside described mixture hopper 3 upper openings, establish discharging opening 2, jaw crusher 16 is established in the below of described discharging opening 2; The next door of described mixture hopper 3; If belt circulation material conveying machine 18; Described belt circulation material conveying machine 18 is for being obliquely installed, and the below of described jaw crusher 16 is through the hopper end that mass transport to described belt circulation material conveying machine 18 is lower; The end that described belt circulation material conveying machine 18 is higher, through hopper with mass transport to material inlet belt conveyor 17; The discharge end of described material inlet belt conveyor 17 is located at the top of described high-efficiency vibration diagrid 1.
Bulk material for high-efficiency vibration diagrid 1 sifts out is sent into jaw crusher 16 fragmentations through discharging opening 2; Again broken material is sent into material inlet belt conveyor 17 through belt circulation material conveying machine 18; And then to carry out sub-sieve through high-efficiency vibration diagrid 1; Realize the circular treatment of material, so that material is handled more thoroughly with abundant.
Described mixture hopper 3 is installed on the steel structure frame 11; And a plurality of compressed spring type dampers 12 are arranged between the bearing-surface of described steel structure frame 11 and mixture hopper 3.
According to complete iron the do steel structure frame 11 of hopper with same volume, mixture hopper 3 is placed on the steel structure frame 11, the advantage of this type of installation form is less demanding to the place.
High-efficiency vibration diagrid 1 is installed to hopper 3 tops through compressed spring type damper 12.Compressed spring type damper 12 alleviates the influence of its vibration to mixture hopper 3 and whole fuselage.
Described frequency conversion type electromagnetic vibration feeder 4 is installed on the described steel structure frame 11 through a plurality of Extension Spring-type dampers 13.
Through Extension Spring-type damper 13 and adjusting leading screw 14 frequency conversion type electromagnetic vibration feeder 4 is suspended on hopper 3 belows.Extension Spring-type damper 13 alleviates the influence of its vibration to whole fuselage.
The leakage material mouth of the bottom of described mixture hopper 3 is established manual bulkhgead gate 15.Manually bulkhgead gate 15 can be controlled the Lou size of material amount.
The end that described band conveyor 5 is lower is established and is regulated screw mandrel 14, is connected with the cylinder of band conveyor 5.The effect of regulating screw mandrel 14 is the degree of tightness of regulating band conveyor 5 belts.
Described smart powder ribbon conveyer 9, iron block ribbon conveyer 10 near the end, be equipped with and regulate screw mandrel 14, be connected with the cylinder of conveyer.Its effect also is the degree of tightness that is used to regulate belt.
The present invention simplifies the technology and the equipment of the magnetic separation of traditional steel (iron) slag through the system of the above efficient magnetic separation classification that provides greatly, and installation cost is very low, and it is very fast to take effect.Adopt technique scheme, reached and improved production efficiency greatly, reduced worker's labour intensity, reduced the production cost purpose.
In order to realize the invention identical with technique scheme, the present invention also provides the sub-sieve magnetic selection method of the sub-sieve magnetic separation system of above-mentioned steel scrap, slag, and the process of described sub-sieve magnetic selection method is:
1, with mixture through material inlet belt conveyor 17 or feed leakage bucket, be transported to high-efficiency vibration diagrid 1, through screening, the mixture of diameter≤200mm is leaked into mixture hopper 3; Send the bulk mixture of diameter>=200mm to jaw crusher 16 fragmentations through discharging opening 2, return high-efficiency vibration diagrid 1 through belt circulation material conveying machine 18 again, get into mixture hopper 3;
2, through frequency conversion type electric vibrating feeder 4 and adjustment type buffer, control delivery rate and feeding coal are layered on the band conveyor 5 compound equably;
Be to guarantee the magnetic separation effect, generally with the THICKNESS CONTROL of the compound on the belt in 10mm; Regulate the rotating speed of belt roller through frequency control, the linear velocity that the belt roller of band conveyor 5 is rotated is adjusted into 300mm/s~500mm/s;
3, when compound arrives the position of adjustable magnetic-core type permanent magnetic pulley 6; Through regulating the magnetic flux of its magnetic core, reach best magnetic separation position, through the current divider 7 of adjustable magnetic-core type permanent magnetic pulley 6 belows; With iron-holder 40% (quality) and above smart powder, scrap iron piece, shunt with nonmetallic substance;
4, through electric vibrating screen net 8 smart powder is separated with the scrap iron piece again;
Smart powder gets into refining powder lot bucket 19 through the eyelet of electric vibrating screen net 8, falls then on the belt of smart powder ribbon conveyer 9;
The scrap iron piece imports iron block hopper 20, falls then on the belt of iron block ribbon conveyer 10;
5, through two band conveyors, respectively smart powder and scrap iron piece are transported to storing district separately.
Below be the explanation that map 4 is carried out:
The electrical control part of the sub-sieve magnetic separation system of described steel scrap, slag comprises:
Described engineer station 1, post operation station 2, netting twine hub 16, Programmable Logic Controller 4 connect through ethernet line 3;
Described master operating station 14 is connected with Programmable Logic Controller 4 through control signal wire 10;
Described controller slave station 5, oscillating feeder frequency converter 6, belt conveyor frequency converter 7, vibratory sieve batcher frequency converter 8 are connected with described Programmable Logic Controller 4 through communication bus 9;
Described controller slave station 5 is connected with local operation case 15 through control signal wire 10;
Described oscillating feeder frequency converter 6 is connected with oscillating feeder motor 11 through control signal wire; Described belt conveyor frequency converter 7 is connected with belt conveyor motor 12 through control signal wire; Described vibratory sieve batcher frequency converter 8 is connected with vibratory sieve batcher motor 13 through control signal wire;
Described oscillating feeder motor 11 is the drive motors of described frequency conversion type electromagnetic vibration feeder 4; Described belt conveyor motor 12 is the drive motors of described band conveyor 5; Described vibratory sieve batcher motor 13 is the drive motors of described electric vibrating screen net 8.
Described netting twine hub is the HUB hub.
Technique scheme has realized the networking control of whole system, the programming Control that adopts the PLC programmable controller and the VFC of motor, to satisfy the requirement of different operating requirement, the speed governing of friction speed continuous stepless.Accuracy, the centralization and decentralization that realized control combine and control the requirement of automation.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; Or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.
Claims (10)
1. the sub-sieve magnetic separation system of a steel scrap, slag, it is characterized in that: the sub-sieve magnetic separation system of described steel scrap, slag comprises mixture hopper (3); High-efficiency vibration diagrid (1) is established in top at the upper opening of described mixture hopper (3), and frequency conversion type electromagnetic vibration feeder (4) and band conveyor (5) are established in the below of the leakage material mouth of its underpart; Described band conveyor (5) is obliquely installed, and a lower end is positioned at the below of described frequency conversion type electromagnetic vibration feeder (4), and a higher end adopts adjustable magnetic-core type permanent magnetic pulley (6); Establish current divider (7) in the below of described adjustable magnetic-core type permanent magnetic pulley (6), described current divider (7) is two funnels, and one of them is smart powder, iron block funnel, and another is nonmetal funnel; Below described smart powder, iron block funnel, establish electric vibrating screen net (8).
2. according to the sub-sieve magnetic separation system of the described steel scrap of claim 1, slag, it is characterized in that: described electric vibrating screen net (8) is obliquely installed; Establish refining powder lot bucket (19) in the below of described electric vibrating screen net (8),, establish iron block hopper (20) in the lower below, a side outside of described electric vibrating screen net (8).
3. according to the sub-sieve magnetic separation system of the described steel scrap of claim 2, slag, it is characterized in that: establish smart powder ribbon conveyer (9) in the below of described refining powder lot bucket (19); Establish iron block ribbon conveyer (10) in the below of described iron block hopper (20).
4. according to the sub-sieve magnetic separation system of the described steel scrap of claim 1, slag, it is characterized in that: outside described mixture hopper (3) upper opening, establish discharging opening (2), jaw crusher (16) is established in the below of described discharging opening (2); The next door of described mixture hopper (3); If belt circulation material conveying machine (18); Described belt circulation material conveying machine (18) is for being obliquely installed, the below of described jaw crusher (16), through hopper with mass transport to the lower end of described belt circulation material conveying machine (18); The end that described belt circulation material conveying machine (18) is higher, through hopper with mass transport to material inlet belt conveyor (17); The discharge end of described material inlet belt conveyor (17) is located at the top of described high-efficiency vibration diagrid (1).
5. according to the sub-sieve magnetic separation system of the described steel scrap of claim 1, slag, it is characterized in that: described mixture hopper (3) is installed on the steel structure frame (11); And a plurality of compressed spring type dampers (12) are arranged between the bearing-surface of described steel structure frame (11) and mixture hopper (3).
6. according to the sub-sieve magnetic separation system of the described steel scrap of claim 5, slag, it is characterized in that: described frequency conversion type electromagnetic vibration feeder (4) is installed on the described steel structure frame (11) through a plurality of Extension Spring-type dampers (13).
7. according to the sub-sieve magnetic separation system of the described steel scrap of claim 1, slag, it is characterized in that: the leakage material mouth of the bottom of described mixture hopper (3), establish manual bulkhgead gate (15).
8. according to the sub-sieve magnetic separation system of the described steel scrap of claim 3, slag, it is characterized in that: the end that described band conveyor (5) is lower, establish and regulate screw mandrel (14), be connected with the cylinder of band conveyor (5).
9. according to the sub-sieve magnetic separation system of each described steel scrap, slag in the claim 1 to 8, it is characterized in that: the electrical control part of the sub-sieve magnetic separation system of described steel scrap, slag comprises:
Engineer station (1), post operation station (2), netting twine hub (16), Programmable Logic Controller (4), master operating station (14), controller slave station (5), oscillating feeder frequency converter (6), belt conveyor frequency converter (7), vibratory sieve batcher frequency converter (8);
Described engineer station (1), post operation station (2), netting twine hub (16), Programmable Logic Controller (4) connect through ethernet line (3);
Described master operating station (14) is connected with Programmable Logic Controller (4) through control signal wire (10);
Described controller slave station (5), oscillating feeder frequency converter (6), belt conveyor frequency converter (7), vibratory sieve batcher frequency converter (8) are connected with described Programmable Logic Controller (4) through communication bus (9);
Described controller slave station (5) is connected with local operation case (15) through control signal wire (10);
Described oscillating feeder frequency converter (6) is connected with oscillating feeder motor (11) through control signal wire; Described belt conveyor frequency converter (7) is connected with belt conveyor motor (12) through control signal wire; Described vibratory sieve batcher frequency converter (8) is connected with vibratory sieve batcher motor (13) through control signal wire;
Described oscillating feeder motor (11) is the drive motors of described frequency conversion type electromagnetic vibration feeder (4); Described belt conveyor motor (12) is the drive motors of described band conveyor (5); Described vibratory sieve batcher motor (13) is the drive motors of described electric vibrating screen net (8).
10. the sub-sieve magnetic selection method of the sub-sieve magnetic separation system of a steel scrap, slag, the sub-sieve magnetic separation system of described steel scrap, slag comprises mixture hopper (3); High-efficiency vibration diagrid (1) is established in top at the upper opening of described mixture hopper (3), and frequency conversion type electromagnetic vibration feeder (4) and band conveyor (5) are established in the below of the leakage material mouth of its underpart; Described band conveyor (5) is obliquely installed, and a lower end is positioned at the below of described frequency conversion type electromagnetic vibration feeder (4), and a higher end adopts adjustable magnetic-core type permanent magnetic pulley (6); Establish current divider (7) in the below of described adjustable magnetic-core type permanent magnetic pulley (6), described current divider (7) is two funnels, and one of them is smart powder, iron block funnel, and another is nonmetal funnel; Below described smart powder, iron block funnel, establish electric vibrating screen net (8);
Described electric vibrating screen net (8) is obliquely installed; Establish refining powder lot bucket (19) in the below of described electric vibrating screen net (8),, establish iron block hopper (20) in the lower below, a side outside of described electric vibrating screen net (8);
Establish smart powder ribbon conveyer (9) in the below of described refining powder lot bucket (19); Establish iron block ribbon conveyer (10) in the below of described iron block hopper (20);
Outside described mixture hopper (3) upper opening, establish discharging opening (2), jaw crusher (16) is established in the below of described discharging opening (2); The next door of described mixture hopper (3); If belt circulation material conveying machine (18); Described belt circulation material conveying machine (18) is for being obliquely installed, the below of described jaw crusher (16), through hopper with mass transport to the lower end of described belt circulation material conveying machine (18); The end that described belt circulation material conveying machine (18) is higher, through hopper with mass transport to material inlet belt conveyor (17); The discharge end of described material inlet belt conveyor (17) is located at the top of described high-efficiency vibration diagrid (1).
It is characterized in that:
The process of described sub-sieve magnetic selection method is:
1), with mixture through material inlet belt conveyor (17) or feed leakage bucket, be transported to high-efficiency vibration diagrid (1), through screening, the mixture of diameter≤200mm is leaked into mixture hopper (3); Send the bulk mixture of diameter>=200mm to jaw crusher (16) fragmentation through discharging opening (2), return high-efficiency vibration diagrid (1) through belt circulation material conveying machine (18) again, get into mixture hopper (3);
2), through frequency conversion type electric vibrating feeder (4) and adjustment type buffer, control delivery rate and feeding coal are layered on the band conveyor (5) compound equably;
With the THICKNESS CONTROL of the compound on the belt in 10mm; Regulate the rotating speed of belt roller through frequency control, the linear velocity that the belt roller of band conveyor (5) is rotated is adjusted into 300mm/s~500mm/s;
3), when compound arrives the position of adjustable magnetic-core type permanent magnetic pulley (6); Through regulating the magnetic flux of its magnetic core; Reach best magnetic separation position; Through the current divider (7) of adjustable magnetic-core type permanent magnetic pulley (6) below,, shunt with nonmetallic substance with iron-holder 40% (quality) and above smart powder, scrap iron piece;
4), through electric vibrating screen net (8) smart powder is separated with the scrap iron piece again;
Smart powder gets into refining powder lot bucket (19) through the eyelet of electric vibrating screen net (8), falls then on the belt of smart powder ribbon conveyer (9);
The scrap iron piece imports iron block hopper (20), falls then on the belt of iron block ribbon conveyer (10);
5), through two band conveyors, respectively smart powder and scrap iron piece are transported to storing district separately.
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