CN212142868U

CN212142868U - Closed-loop grading screening quality-improving system for minerals

Info

Publication number: CN212142868U
Application number: CN201922159360.7U
Authority: CN
Inventors: 罗阳勇; 谭加涛
Original assignee: SICHUAN ANNING IRON AND TITANIUM CO Ltd
Current assignee: SICHUAN ANNING IRON AND TITANIUM CO Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-12-15
Anticipated expiration: 2029-12-05

Abstract

The utility model relates to a mineral closed loop is hierarchical sieves and is upgraded system belongs to ore dressing system technical field. The device comprises a spiral slag extractor (1), a linear screening machine (2), a material returning belt conveyor (3) and a ball mill (4), wherein the inlet of the spiral slag extractor (1) is communicated with the outlet of the ball mill (4), the slag outlet of the spiral slag extractor (1) is arranged above the material returning belt conveyor (3), the overflow port of the spiral slag extractor (1) is connected with the inlet of the linear screening machine (2), the coarse material outlet (21) of the linear screening machine (2) is arranged above the material returning belt conveyor (3), and the discharge end of the material returning belt conveyor (3) is connected with the inlet of the ball mill (4); and the distance between the adjacent helical blades (11) of the helical slag extractor (1) is reduced from bottom to top in sequence. The device has compact connection and easy maintenance; meanwhile, the required product granularity is obtained by adjusting the size of the sieve pores of the linear sieving machine (2), and the grading pressure of the cyclone can be reduced; meanwhile, the problems of high energy consumption and high production cost of the conventional system grader are solved.

Description

Closed-loop grading screening quality-improving system for minerals

Technical Field

The utility model relates to a mineral closed loop is hierarchical sieves and is upgraded system belongs to ore dressing system technical field.

Background

In the process of ore dressing, a series of procedures of crushing, grinding, magnetic separation, classification and the like are required to separate impurities from ores, and the vanadium titano-magnetite is not only an important source of iron, but also various associated components of vanadium, titanium, chromium, cobalt, nickel, platinum family, scandium and the like, so that the vanadium titano-magnetite has high comprehensive utilization value. In the actual beneficiation process, because magnetite and titanium mineral in the vanadium-titanium magnetite ore are in continuous crystallization, the particles are thick and thick, and the particles are not uniformly distributed and are difficult to grind. The grindability coefficient of the ore is about 1/2 of magnetite quartzite, and the ore belongs to ore which is easy to select and difficult to grind and has low mineral purity. Therefore, the existing other types of mills have low yield, high energy consumption and high cost when in actual operation, and can not meet the requirements of actual production on low energy consumption and low cost. The traditional process of the existing ball mill is that discharged wet flow enters a classifier, fine ore of the wet flow of the classifier enters the next procedure, coarse material spirally returns to the ball mill to enter a ball milling cycle for the second time, and the process has the following process defects: 1. the existing spiral classifier has large volume and non-compact structure; 2. the structure is complex, and the maintenance cost is high; 3. the granularity control difficulty is high, and the grading pressure of the cyclone is high; 4. high power consumption and high cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that current system grader energy consumption is high, problem that manufacturing cost is high.

The utility model provides a technical scheme that its technical problem adopted is: the mineral closed-loop grading screening quality-improving system comprises a spiral slag extractor, a linear screening machine, a material returning belt machine and a ball mill, wherein an inlet of the spiral slag extractor is communicated with an outlet of the ball mill, a slag outlet at the upper end of the spiral slag extractor is positioned above a belt of the material returning belt machine, an upper overflow port of a hopper of the spiral slag extractor is connected with an inlet of the linear screening machine, a coarse material outlet of the linear screening machine is positioned above a feeding end of the material returning belt machine, and a discharging end of the material returning belt machine is connected with an inlet of the ball mill; and the distance between adjacent helical blades inside the spiral slag lifting machine is reduced from bottom to top in sequence.

In the system, the distance between the adjacent spiral blades at the bottom of the spiral slag extractor is 2-4 times that between the adjacent spiral blades at the upper part of the spiral slag extractor.

Further, in the system, the distance between the adjacent helical blades at the bottom of the spiral slag extractor is 3 times that between the adjacent helical blades at the upper part of the spiral slag extractor.

The system also comprises a plurality of sound insulation buffer plates, wherein the sections of the sound insulation buffer plates are of arc structures and are of wavy structures along the length direction of the sound insulation buffer plates; the ball mill sets up barrel and welt including the interval, and the welt setting is in the inside of barrel, and the buffer board that gives sound insulation sets up in the clearance between barrel and welt, and the department of bending and the contact of barrel inner wall or welt outer wall of buffer board that gives sound insulation are connected.

Further, in the system, the sound insulation buffer plate comprises an elastic plate body and sound insulation cotton, and the sound insulation cotton is arranged on the inner side wall and the outer side wall of the elastic plate body.

Further, in the system, the elastic plate body is made of hard plastics or aluminum alloy plates.

Further, still include adjusting spring in the above-mentioned system, barrel and welt pass through connecting bolt fixed, and the interval is provided with a plurality of through-holes on the barrel, and connecting bolt's screw rod one end is fixed with the welt outer wall, and the other end passes the through-hole and extends outside the barrel and be connected with connecting bolt's nut again, and the adjusting spring cover is established on the screw rod, and adjusting spring's one end and welt outer wall contact are connected, and the other end and barrel inside wall contact are connected.

Furthermore, in the system, the adjusting springs are arranged at intervals, and a connecting bolt which is not sleeved with the adjusting springs is arranged between every two adjacent adjusting springs at intervals.

Furthermore, in the system, the adjusting spring is of a circular truncated cone-shaped structure, and the large end of the adjusting spring is in contact connection with the inner wall of the cylinder body.

The utility model has the advantages that: this system is through addding the spiral and carrying the sediment machine, and because the granularity of ore differs during actual production, the granularity is big directly drops to the hopper bottom, and the suspended solid that the granularity is little can be followed the upper portion overflow mouth outflow of spiral sediment machine hopper, and it is reserve to go on screening the thin material that satisfies the technological requirement through the sharp screening machine directly through thin material export discharge. The discharged materials with larger granularity are sent to the upper part of the feeding end of the material returning belt machine through the coarse material outlet of the linear sieving machine, so that the ores at the coarse material outlet of the linear sieving machine and the ores from the slag outlet of the spiral slag extractor can be directly conveyed into the ball mill through the material returning belt machine to be ground again until the granularity meeting the process requirement is obtained, and the system can effectively reduce the energy consumption by adopting closed-loop control; simultaneously the inside adjacent helical blade's of sediment machine is carried to spiral of this system interval is reduced by bottom to top in proper order for in the unit interval when the great ore of granularity right side is supreme transportation down, the great ore of granularity reduces along the displacement of the axis direction operation of sediment machine is carried to the spiral, and increased the great ore of granularity and stayed the time in the spiral barrel of sediment machine is carried to the spiral, makes the water content in the ore reduce, the transportation of the return material belt feeder of being convenient for, also the transportation pressure of greatly reduced return material belt feeder simultaneously. Meanwhile, the device is compact in equipment connection and easy to maintain; meanwhile, the required product granularity is obtained by adjusting the size of the sieve pores of the linear sieving machine, so that the classification pressure of the subsequent cyclone can be reduced; meanwhile, the problems of high energy consumption and high production cost of the conventional system grader are solved.

Drawings

FIG. 1 is a schematic view of the system flow of the present invention;

FIG. 2 is a schematic view of the structure of a partial section of the ball mill of the present invention;

FIG. 3 is an enlarged schematic view of the structure at III in FIG. 2 according to the present invention;

FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 2 according to the present invention;

fig. 5 is a schematic structural view of the adjusting spring arranged at an interval in fig. 4 according to the present invention;

FIG. 6 is an enlarged schematic view of the structure at the position I in FIG. 4 according to the present invention;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 2 illustrating an adjustment spring disposed at an interval in accordance with the present invention;

fig. 8 is an enlarged schematic view of the structure at II in fig. 7 according to the present invention.

Labeled as: the device comprises a spiral slag extractor 1, a spiral blade 11, a slag outlet 12, a linear sieving machine 2, a coarse material outlet 21, a fine material outlet 22, a material returning belt conveyor 3, a ball mill 4, a cylinder 41, a lining plate 42, a connecting bolt 43, a sound insulation buffer plate 5, an elastic plate body 51, soundproof cotton 52 and an adjusting spring 6.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 8, the utility model discloses a mineral closed-loop grading screening upgrading system, including spiral slag extractor 1, linear sieving machine 2, returning charge belt conveyor 3 and ball mill 4, the import of spiral slag extractor 1 communicates with the export of ball mill 4, and the upper end slag notch 12 of spiral slag extractor 1 is located above the belt of returning charge belt conveyor 3, and the upper portion overflow mouth of the hopper of spiral slag extractor 1 is connected with the inlet of linear sieving machine 2, and the coarse fodder export 21 of linear sieving machine 2 is located above the feed end of returning charge belt conveyor 3, and the discharge end of returning charge belt conveyor 3 is connected with the inlet of ball mill 4; and the distance between adjacent helical blades 11 in the spiral slag extractor 1 is reduced from bottom to top in sequence. The technical personnel in the field can understand that, this system is through addding spiral carry sediment machine 1, with the import of spiral carry sediment machine 1 and the export of ball mill 4 intercommunication for in the ore after 4 grinds ball mill directly gets into the hopper of spiral carry sediment machine 1, because the granularity of ore differs, the big directness of granularity drops to the hopper bottom, the suspended solid that the granularity is little can be followed the upper portion overflow mouth outflow of spiral carry sediment machine 1 hopper. Meanwhile, the upper end slag hole 12 of the spiral slag extractor 1 is positioned above the belt of the return belt conveyor 3, so that the slag hole 12 positioned at the upper part of the spiral slag extractor 1 is positioned, the spiral slag extractor 1 can convey ores positioned at the bottom of the hopper to the slag hole 12 for discharge through the internal spiral blade 11, the slag hole 12 is positioned above the return belt conveyor 3, so that the ores with larger granularity can directly enter the return belt conveyor 3, the upper overflow hole of the hopper of the spiral slag extractor 1 is connected with the inlet of the linear screening machine 2, the fine materials meeting the process requirements are screened through the linear screening machine 2 and directly discharged through the fine material outlet 22 for standby use, the discharged materials with larger granularity are conveyed to the upper part of the feeding end of the return belt conveyor 3 through the coarse material outlet 21 of the linear screening machine 2, the discharging end of the return belt conveyor 3 is connected with the inlet of the ball mill 4, so that the ores at the coarse material outlet 21 of the linear screening machine 2 and the ores at the slag hole 12 of the The mixture is sent into the ball mill 4 to be milled again until the granularity meeting the process requirement is obtained, and new ore materials are added during ball milling, so that the system can effectively reduce energy consumption by adopting closed-loop control; the interval of the inside adjacent helical blade 11 of this preferred spiral of system carrying sediment machine 1 simultaneously reduces by descending in proper order, in unit time when making the great ore of granularity under the right side supreme transportation through this kind of structure setting, the great ore of granularity reduces along the displacement of the axis direction operation of spiral carrying sediment machine 1, and increased the great ore of granularity and stayed the time in the spiral section of thick bamboo of spiral carrying sediment machine 1, make the water content in the ore reduce, be convenient for the transportation of material returning belt feeder 3, the transportation pressure of the material returning belt feeder 3 that also can greatly reduced simultaneously. The spiral slag lifting machine 1 is the prior art, and mainly comprises a hopper and a screw machine, wherein the hopper is arranged at the lower part of the screw machine, and the spiral blades 11 are arranged in the hopper, and the spiral blades 11 are spirally arranged on a rotating shaft, and the adjacent spiral blades 11 are understood as the distance between the two blades arranged along the axial direction of the rotating shaft. In order to meet the feeding requirement of the linear sieving machine 2, the mixture flowing out of the overflow port of the hopper of the spiral slag extractor 1 is preferably dewatered and concentrated and then enters the linear sieving machine 2.

Preferably, in the system, the distance between the adjacent spiral blades 11 at the bottom of the spiral slag extractor 1 is 2-4 times that between the adjacent spiral blades 11 at the upper part of the spiral slag extractor 1. The technical personnel in the field can understand that the system only further prefers that the distance between the adjacent spiral blades 11 at the bottom of the spiral slag extractor 1 is 2-4 times the distance between the adjacent spiral blades 11 at the upper part of the spiral slag extractor 1, so that the axial transportation speed of the ore with large bark beetles is reduced, the dehydration time of the ore is prolonged, and the transportation of the later-stage material returning belt conveyor 3 is facilitated.

Preferably, in the system, the distance between the adjacent helical blades 11 at the bottom of the spiral slag extractor 1 is 3 times that between the adjacent helical blades 11 at the upper part of the spiral slag extractor 1. As can be understood by those skilled in the art, through long-term test, the system only prefers that the distance between the adjacent spiral blades 11 at the bottom of the spiral slag extractor 1 is 3 times of the distance between the adjacent spiral blades 11 at the upper part of the spiral slag extractor 1.

Preferably, the system also comprises a plurality of sound insulation buffer plates 5, and the sections of the sound insulation buffer plates 5 are arc-shaped structures and are wavy structures along the length direction of the sound insulation buffer plates; the ball mill 4 includes that the interval sets up barrel 41 and welt 42, and the welt 42 sets up in the inside of barrel 41, and the buffer board 5 that gives sound insulation sets up in the clearance between barrel 41 and welt 42, and the department of bending of buffer board 5 that gives sound insulation is connected with the contact of barrel 41 inner wall or welt 42 outer wall. As can be understood by those skilled in the art, the system preferably arranges the barrel 41 and the lining board 42 of the ball mill 4 at intervals, and a plurality of wavy sound insulation buffer plates 5 are arranged in the gap between the barrel 41 and the lining board 42, and the sound insulation buffer plates 5 can preferably wrap the outer wall of the whole lining board 42 due to the circumferential arrangement of the sound insulation buffer plates 5. Make the department of bending of buffer board 5 that gives sound insulation can directly be connected with the contact of 41 inner walls of barrel or 42 outer walls of welt, make 5 department of bending of buffer board that gives sound insulation can only follow its length direction flexible after the extrusion, this kind of structure setting makes 4 inside grinding balls of ball mill at the during operation to the 5 cushions of striking accessible compression sound insulation buffer board of welt 42, realize protecting 42's of welt purpose, this kind of structure setting can also reduce rocking of ball mill 4, extension equipment life.

Preferably, in the above system, the soundproof cushion panel 5 includes a flexible panel body 51 and soundproof cotton 52, and the soundproof cotton 52 is disposed on inner and outer side walls of the flexible panel body 51. It can be understood by those skilled in the art that the present device is only a specific structure of the preferred soundproof buffer plate 5, and comprises the elastic plate body 51 and the soundproof cotton 52, while the structure of the elastic plate body 51 is a wave-shaped structure along the length direction thereof, and the cross section is an arc-shaped structure, and the actual cylinder 41 and the liner plate 42 achieve the purpose of shock absorption through the elastic plate body 51. Meanwhile, the sound insulation cotton 52 is preferably arranged on the inner side wall and the outer side wall of the elastic plate body 51, so that the noise generated when the ball mill 4 operates is reduced.

Preferably, the elastic plate body 51 in the above system is made of hard plastic or aluminum alloy plate. It will be appreciated by those skilled in the art that the present system preferably has the elastomeric sheet body 51 made of a rigid plastic or aluminum alloy sheet having a strength such that shock absorption is achieved by elastic deformation of the elastomeric sheet body 51.

Preferably, the system further comprises an adjusting spring 6, the cylinder 41 and the lining plate 42 are fixed through a connecting bolt 43, a plurality of through holes are formed in the cylinder 41 at intervals, one end of a screw rod of the connecting bolt 43 is fixed to the outer wall of the lining plate 42, the other end of the screw rod penetrates through the through holes to extend out of the cylinder 41 and then is connected with a nut of the connecting bolt 43, the adjusting spring 6 is sleeved on the screw rod, one end of the adjusting spring 6 is in contact connection with the outer wall of the lining plate 42, and the other end of the adjusting spring is in. As can be understood by those skilled in the art, it is preferable that a plurality of through holes are formed in the side wall of the cylinder 41 in West and West, so that one end of the screw of the connecting bolt 43 can extend into the inside of the cylinder 41 and then be fixedly connected with the outer wall of the lining plate 42, the adjusting spring 6 is sleeved outside the screw of the connecting bolt 43, one end of the adjusting spring 6 is in contact connection with the outer wall of the lining plate 42, the other end of the adjusting spring is in contact connection with the inside of the cylinder 41, and the adjusting spring 6 can buffer the impact of the grinding balls inside the ball mill 4 on the lining plate 42, so as to achieve the purpose.

Preferably, in the above system, the adjusting springs 6 are arranged at intervals, and a connecting bolt 43 without the adjusting springs 6 is arranged between two adjacent adjusting springs 6 at intervals. As can be understood by those skilled in the art, under the condition of ensuring the shock absorption, the adjusting springs 6 are preferably arranged at intervals, and the connecting bolt 43 without the adjusting springs 6 is arranged between two adjacent adjusting springs 6 at intervals, so that the installation time and the use amount of the adjusting springs 6 can be reduced, and the purpose of reducing the cost is achieved.

Preferably, in the above system, the adjusting spring 6 is a truncated cone-shaped structure, and the large end is in contact connection with the inner wall of the cylinder 41. As will be understood by those skilled in the art, in order to ensure the axial compression of the adjusting spring 6 along the connecting bolt 43, the adjusting spring 6 is preferably of a truncated cone shape with a large end contacting the inner wall of the cylinder 41.

Claims

1. Mineral closed-loop grading screening quality-improving system is characterized in that: the device comprises a spiral slag extractor (1), a linear screening machine (2), a return belt conveyor (3) and a ball mill (4), wherein an inlet of the spiral slag extractor (1) is communicated with an outlet of the ball mill (4), an upper end slag outlet (12) of the spiral slag extractor (1) is positioned above a belt of the return belt conveyor (3), an upper overflow port of a hopper of the spiral slag extractor (1) is connected with an inlet of the linear screening machine (2), a coarse material outlet (21) of the linear screening machine (2) is positioned above a feeding end of the return belt conveyor (3), and a discharging end of the return belt conveyor (3) is connected with an inlet of the ball mill (4); and the distance between adjacent helical blades (11) in the spiral slag lifting machine (1) is reduced from bottom to top in sequence.

2. The mineral closed loop graded screening upgrading system of claim 1, characterized in that: the distance between the adjacent spiral blades (11) at the bottom of the spiral slag lifting machine (1) is 2-4 times that between the adjacent spiral blades (11) at the upper part of the spiral slag lifting machine (1).

3. The mineral closed loop graded screening upgrading system of claim 2, characterized in that: the distance between the adjacent helical blades (11) at the bottom of the spiral slag extractor (1) is 3 times that between the adjacent helical blades (11) at the upper part of the spiral slag extractor (1).

4. The closed loop graded screening and upgrading system for minerals according to any one of claims 1 to 3, characterized in that: the sound insulation buffer plate is characterized by further comprising a plurality of sound insulation buffer plates (5), wherein the sections of the sound insulation buffer plates (5) are of arc-shaped structures and are of wavy structures along the length direction of the sound insulation buffer plates; the ball mill (4) sets up barrel (41) and welt (42) including the interval, and welt (42) set up in the inside of barrel (41), and gives sound insulation buffer board (5) set up in the clearance between barrel (41) and welt (42), and the department of bending of giving sound insulation buffer board (5) and barrel (41) inner wall or welt (42) outer wall contact connection.

5. The mineral closed loop graded screening upgrading system of claim 4, characterized in that: the soundproof buffer plate (5) comprises an elastic plate body (51) and soundproof cotton (52), wherein the soundproof cotton (52) is arranged on the inner side wall and the outer side wall of the elastic plate body (51).

6. The mineral closed loop graded screening upgrading system of claim 5, characterized in that: the elastic plate body (51) is made of hard plastics or aluminum alloy plates.

7. The mineral closed loop graded screening upgrading system of claim 4, characterized in that: still include adjusting spring (6), barrel (41) and welt (42) are fixed through connecting bolt (43), and the interval is provided with a plurality of through-holes on barrel (41), and the screw rod one end and welt (42) outer wall of connecting bolt (43) are fixed, and the other end passes the through-hole and extends barrel (41) outer nut again and be connected with connecting bolt (43), and adjusting spring (6) cover is established on the screw rod, and the one end and the welt (42) outer wall contact of adjusting spring (6) are connected, and the other end is connected with barrel (41) inside wall contact.

8. The mineral closed loop graded screening upgrading system of claim 7, characterized in that: the adjusting springs (6) are arranged at intervals, and a connecting bolt (43) which is not sleeved with the adjusting springs (6) is arranged between every two adjacent adjusting springs (6).

9. The mineral closed loop graded screening upgrading system of claim 7, characterized in that: the adjusting spring (6) is of a circular truncated cone-shaped structure, and the large end of the adjusting spring is in contact connection with the inner wall of the cylinder body (41).