CN210434860U

CN210434860U - Differentiated fine beneficiation host

Info

Publication number: CN210434860U
Application number: CN201920781834.9U
Authority: CN
Inventors: 景红
Original assignee: Yunnan Zhengjin Times Technology Co ltd
Current assignee: Yunnan Zhengjin Times Technology Co ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-05-01
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a meticulous ore dressing host computer of differentiation relates to the mineral field of grading, include: a cylindrical host sleeve; a fan parallel to the section of the main machine sleeve is arranged above the inner part of the cylindrical main machine sleeve; a plurality of rectifying disks parallel to the fan are also arranged in the main machine sleeve; a feeding pipeline penetrates through the middle part of the rectifying disc, and the feeding end of the feeding pipeline is arranged below the fan and penetrates out of the side face of the main machine sleeve; a diffuser device is arranged below the feeding pipeline, and the lower part of the diffuser device is connected with a motor; the lower part of the diffuser device is also provided with a material grading sleeve; the diffuser device consists of a material receiving disc and a pressure plate arranged on the material receiving disc, a cavity is arranged between the material receiving disc and the pressure plate, and a gap is reserved at the contact position of the material receiving disc and the pressure plate; the material grading sleeve is composed of a plurality of concentric sleeves concentric with the material receiving disc.

Description

Differentiated fine beneficiation host

Technical Field

The invention relates to the field of mineral grading, in particular to a differentiated fine beneficiation host.

Background

The amount of rich ore that can be directly used for smelting in nature is not large, and particularly with the development of industrial production, the reserves of rich ore are gradually reduced, so more and more lean ores have to be mined. However, smelting with low grade lean ores is uneconomical. In order to reduce the smelting cost, effectively extract useful components in the ores and comprehensively utilize national resources, the ores mined from mines need to be subjected to ore dressing before smelting. The preparation operation process comprises the following steps: crushing, screening, grinding, grading and the like.

The concentrate grade and the metal recovery rate of the existing narrow-grade ore dressing are obviously higher than those of non-narrow-grade ore dressing, the concentrate grade of the dry-type narrow-grade magnetite can reach more than 68%, the metal recovery rate can reach more than 90%, and the ore dressing is far higher than that of the traditional ore dressing process technology. And narrow-grade ore dressing has high requirements on the classification process. However, the existing grading method may consume a large amount of water resources, and generally only can be divided into two stages or three stages, and if the minerals are required to be divided into multiple stages, multiple devices are required to be jointly used.

The traditional multistage mechanical screening has fewer levels capable of grading at one time, the screening efficiency is low, the efficiency of the traditional high-frequency De-Rick vibrating screen with the highest efficiency is lower than 70%, products on the screen contain a large amount of products under the screen, and the screen is easy to block and the treatment capacity is not large. Traditional dry-type air current grading equipment can divide the material to be graded into coarse grain, medium grain and fine grain through the cooperation of air current and grading way, can only realize three grades and classify, and the classification effect is poor, still contains a large amount of fine grain grades in the coarse grain, can not realize meticulous accurate classification effect.

Disclosure of Invention

The invention aims to provide a differentiated fine beneficiation host, which realizes multi-stage fine grading and solves the problem that fine grading cannot be carried out on mineral powder at present.

In order to solve the above problems, a first aspect of the present invention provides a differentiated fine mineral processing host, including: a cylindrical host sleeve 1; a fan 2 parallel to the section of the main engine sleeve 1 is arranged above the inner part of the cylindrical main engine sleeve 1; a plurality of rectifying disks 3 parallel to the fan 2 are also arranged in the main machine sleeve 1; a feeding pipeline 4 penetrates through the middle part of the rectifying disc 3, and the feeding end of the feeding pipeline 4 is arranged below the fan 2 and penetrates out of the side surface of the main machine sleeve 1; a diffuser device 5 is arranged below the feeding pipeline 4, and the lower part of the diffuser device 5 is connected with a motor 7; the lower part of the diffuser device 5 is also provided with a material grading sleeve 6; the disperser device 5 consists of a receiving disc 51 and a pressing disc 52 arranged on the receiving disc 51, a cavity is arranged between the receiving disc 51 and the pressing disc 52, and a gap is arranged between the contact surfaces of the receiving disc 51 and the pressing disc 52; the material classifying sleeve 6 is composed of a plurality of concentric sleeves 61 concentric with the take-up pan 51. Wherein the power of the fan 2 can be 0.75-1.5 kW; the power of the motor 7 can be 1-5 kW. The pressure plate 52 is connected with the receiving plate 51 through bolts. The motor 7 is connected with the receiving tray 51 through a rotating shaft, and controls the receiving tray 51 to rotate. The power and the rotational speed of the fan 2 can be adjusted according to the throughput and the type of ore to be treated. The power and the rotational speed of the motor 7 can also be adjusted according to the throughput and the type of ore to be treated. In one embodiment, a wind-proof pipe with the same diameter as the pressure plate 52 can be arranged at the position of the center of the rectifying disc 3 penetrating through the feeding pipeline 4, so that the wind generated by the fan is prevented from directly blowing onto the pressure plate to cause the vertically downward wind to be disordered.

The receiving tray 51 further comprises a circular base plate 511, a circular truncated cone 512 and a circular ring wall 513, wherein the circular truncated cone 512 and the circular ring wall 513 are concentric with the circular base plate 511, the outer ring surface of the circular ring wall 513 is perpendicular to the base plate 511, the diameter of the circular ring wall is the same as that of the circular base plate 511, the inner ring surface of the circular ring wall 513 is a conical surface, the section of the circular ring wall 513 is a right-angled trapezoid of which the bottom edge is parallel to the circular base plate 511, and the longer bottom edge of the right-angled; the center of the pressure plate 52 is provided with a material inlet 521, the material inlet 521 is provided with a tapered sleeve 522 with a narrow upper part and a wide lower part, and the feeding pipeline 4 extends into the tapered sleeve 522. The feeding pipe 4 and the conical sleeve 522 are provided with a gap, the conical sleeve 522 can rotate along with the pressure plate 52 without influencing the stability of the feeding pipe, and mineral aggregate cannot leak out through the gap between the feeding pipe 4 and the conical sleeve 522. Mineral aggregate can enter from the feeding pipe, and then falls on the circular truncated cone 512 in the middle of the receiving disc 51 through the conical sleeve 522 through the feeding port 521 on the pressure plate 52; after falling onto the circular truncated cone 512 and contacting with the circular truncated cone, the mineral aggregate is subjected to the action of friction force to start to perform centrifugal action, wherein the taper of the conical sleeve 522 is 1.15-2, the conical sleeve 522 rotates along with the pressure plate 52, and the mineral particles can smoothly fall under the taper without moving upwards along the conical surface of the conical sleeve 522 due to the centrifugal force.

The further technical scheme is that the diameter difference of two adjacent concentric sleeves 61 of the material grading sleeve 6 from inside to outside is gradually increased. An annular cylindrical channel 62 can be formed between every two adjacent concentric sleeves 61, and when the diameter difference of the two adjacent concentric sleeves 61 is gradually increased, the inlet of the annular cylindrical channel 62 formed between the two adjacent concentric sleeves 61 is also gradually increased from inside to outside. The annular cylindrical passage 62 near the center is used to grade lighter mineral particles and the annular cylindrical passage 62 further outward is used to grade heavier mineral particles. The wider annular cylindrical passage 62 is only able to pass mineral particles of the same grade, as they are heavier, and they move a greater distance in the horizontal direction.

A further technical scheme is that a ring-cylindrical channel 62 is formed between every two layers of concentric sleeves 61 of the material grading sleeve 6, a material receiving plate 63 is arranged at the bottom of each ring-cylindrical channel 62, the material receiving plate 63 is installed on one concentric sleeve 61 in the ring-cylindrical channel 62, and an opening is formed between the lower edge of the outer sleeve and the material receiving plate 63, so that particles can fall onto the material receiving plate 63 from the ring-cylindrical channel 62; the material receiving plate 63 is composed of two ridge-shaped inclined planes, the edge of the inclined plane is provided with a vertical flange, and the lowest end of the inclined plane is provided with a material outlet 65; the material receiving plate 63 is further provided with a windproof net 66, the windproof net 66 is parallel to the material receiving plate 63, and a gap is formed between the windproof net 66 and the material receiving plate 63. The included angle between the two inclined planes is 90-130 degrees, and in the angle range, when mineral particles fall down, the mineral particles cannot bounce too high on the material receiving plate 63, and the mineral particles can conveniently slide towards the discharge hole 65. The mesh number of the windproof net 66 is 14-50 meshes, and the windproof net 66 of the specification can enable mineral particles to fall below the windproof net 66, so that the mineral particles are effectively prevented from being blown up by wind. When in use, mineral particles fall onto the windproof net 66 on the material receiving plate 63 through the annular cylindrical passage 62 of the grading sleeve, pass through the windproof net 66 and then fall onto the material receiving plate 63, and bounce for several times at a small distance between the material receiving plate 63 and the windproof net 66 and then slide to the discharge hole 65 of the material receiving plate 63 along the material receiving plate 63. While the mineral particles pass through the classifying sleeve, the air flow generated by the fan 2 also passes through an annular cylindrical passage 62 of the classifying sleeve, then passes through the wind-proof net 66 along with the mineral particles, and then is rebounded by the material receiving plate 63 to blow out of the wind-proof net 66. After the windproof net 66 is additionally arranged in actual production, the probability that mineral particles are blown by wind generated by the fan 2 and are ejected out of the material receiving plate 63 can be effectively reduced. The distance between the windproof net 66 and the material receiving plate 63 is 6-10 mm.

A further technical scheme is that the gap between the receiving disc 51 and the pressing disc 52 is 0.1-2.0 mm. The gap between the receiving tray 51 and the pressure plate 52 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0mm, preferably 0.3-1.5 mm, including but not limited to the above examples, and can be adjusted according to the characteristics of the ore species actually classified. When dry ore dressing is carried out, the ore is generally ground to 200 meshes and then classified, when the gap between the receiving disc 51 and the pressure plate 52 is 0.1-2.0 mm, mineral particles can easily pass through the gap without causing blockage, the mineral particles can be uniformly thrown out, collision among the particles is greatly reduced when the gap moves between the gap and the classifying sleeve, and the classifying efficiency is higher; the possibility of blocking the gap occurs when the gap is less than 0.1mm, and the impact between the mineral particles increases when the gap is too large as the particles move between the gap and the classifying sleeve, which affects the classifying effect. The gap between the take-up plate 51 and the pressure plate 52 is adjusted by bolts and spacers. After the wear-resistant cable is used, the distance can be continuously adjusted again through the bolts and the gaskets, and the service life is prolonged.

The further technical proposal is that the rectifying disc 3 is a grid structure formed by a plurality of thin plates vertical to the section of the main machine sleeve 1. The grid-like structure's fairing disc 3 can be vertical decurrent vertical wind with the whirlwind rectification that fan 2 produced, makes the mineral particle receive the effect of vertical wind and can reduce the horizontal displacement of mineral particle between diffuser device 5 and material grading sleeve 6 greatly, just can make the mineral particle carry out in hierarchical less container. A movable inspection door can be arranged on the side surface of the main machine sleeve 1 and can be used for detecting the wind speed in the main machine sleeve 1. When different mineral particles are classified, the wind power of the fan 2 and the rotating speed of the motor 7 can be adjusted to adapt to the properties of the different mineral particles. The side length of the grid in the rectifying disc 3 can be 10-15 cm.

The further technical proposal is that the upper edges of the concentric sleeves 61 forming the material grading sleeve 6 are positioned on the same grading plane 64, and the grading plane 64 is parallel to the receiving tray 51.

A further technical scheme is that a distance adjusting device 8 is arranged between the material receiving disc 51 and the material grading sleeve 6, and the distance between the grading plane 64 and the material receiving disc 51 is 6-12 cm. The separation time of the mineral particles is limited by the distance between the grading plane 64 and the receiving disc 51, when the distance between the grading plane 64 and the receiving disc 51 is 6-12 cm, the mineral particles of each grade are well graded when reaching the grading plane 64, and a good grading effect can be achieved; if the distance between the classification plane 64 and the receiving tray 51 is too small, the mineral particles of each grade are not sufficiently dispersed when reaching the classification plane 64, which may cause a problem of poor classification effect. The distance between the grading plane 64 and the receiving tray 51 can be 6, 7, 8, 9, 10, 11, 12cm, preferably 8-10 cm, including but not limited to the above examples, and can also be adjusted according to the characteristics of the ore species to be graded. The distance between the grading plane 64 and the receiving disc 51 can be adjusted, mineral particles can be dispersed to the grading planes 64 of all the material grading sleeves 6 according to different mineral adjustment, and the situation that only part of the material grading sleeves 6 are used cannot occur.

According to a further technical scheme, the annular cylindrical channel 62 of the innermost sleeve of the material grading sleeve 6 is connected with a dust removing device 9. The particles falling into the innermost annular cylindrical channel 62 of the material classifying sleeve 6 after classification are generally fine waste materials, and can be connected with a dust removing device 9 to prevent dust pollution. While the other annular cylindrical channels 62 are larger in size and do not contribute to significant dust contamination. The inventor surprisingly finds that the classification method of the invention has less dust pollution and better working environment compared with other classification methods of dry ore dressing.

A further technical scheme is that the material grading sleeve 6 comprises 3-21 concentric sleeves 61. Wherein the annular column shape passageway 62 that constitutes between two adjacent sleeves can supply the mineral particle to pass through, and 3 ~ 21 concentric sleeves 61 can form 2 ~ 20 annular column shape passageways 62, divide into 2 ~ 20 grades to the mineral particle, are greater than present generally to the hierarchical quantity of mineral particle far away. The material classifying sleeve 6 may include 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 concentric sleeves 61, preferably 5 to 16, including but not limited to the above examples, which may be adjusted according to the actual ore species and the classifying requirement.

The principle of the invention is explained as follows: when the device is used, mineral powder ground by the ball mill enters the feeding pipeline 4, the feeding pipeline 4 is Y-shaped, the mineral powder enters through feeding pipe inlets arranged on two sides of the main machine sleeve 1 and converges at a tee joint, then the mineral powder downwards enters the conical sleeve 522 on the pressure plate 52 of the diffuser device 5 along a vertical feeding main pipeline and leaves the feeding pipeline 4, and the mineral powder enters a cavity between the pressure plate 52 and the material receiving plate 51 through the feeding port 521 of the pressure plate 52 after passing through the conical sleeve 522. The diverger device 5 rotates through a motor 7 arranged below the diverger device, centrifugal force generated by rotation forces mineral particles in the cavity of the pressure plate 52 and the receiving disc 51 to move to the periphery of the cavity, the mineral particles are upwards extruded along the inclined plane of the annular inner ring, move to the junction of the pressure plate 52 and the receiving disc 51 and are scattered out of the diverger device through a gap at the junction, and the scattering direction is 360 degrees in the horizontal direction. The movement of the mineral particles after leaving the dispersion mechanism is a centrifugal movement in the horizontal plane and a flat projectile movement in the vertical plane. And the wind generated by the fan 2 forms vertically downward wind after passing through the rectifying disc 3. After the vertical downward wind force acts on the mineral particles, the vertical movement time of the mineral particles is reduced, and the horizontal displacement of the mineral particles is reduced. The greater the momentum of the mineral particles, the greater their displacement in the horizontal direction, the closer to the outside when falling into the material classifying sleeve 6. The waste material with the smallest mass falls into the innermost sleeve of the material classifying sleeve 6 and then enters the dust removing device 9 through the discharge hole 65. Other mineral particles enter different sleeves of the material classifying sleeve 6, are classified into several classes and are collected from different discharge openings 65.

Mineral powder freely falls into through the conveying pipe and disperses device 5, becomes 360 dispersions of horizontal direction to mineral powder by dispersing device 5, no matter particle size can both guarantee that the mineral grain is dispersed away with the same initial velocity, and disperser device's clearance size can be adjusted in 0.1 ~ 1.5 mm's scope, and the mineral grain size of being handled has decided the clearance aperture. The dispersed mineral powder is acted by gravity, air resistance and downward airflow at the same time, the motion trail is similar to a parabolic state but not in a parabolic state, the minerals with different particle sizes are acted by resultant force, the motion distance is quite different, the distance with large particle size is far away from that with small particle size, and thus the whole grading process is realized. In addition, the quality of the minerals and the gangue is different due to density difference between the minerals and the gangue with the same granularity, the motion distance of the mass is longer when the mass is the same, the inertia is larger when the mass is larger, and therefore grading operation is also carried out between the materials with different density differences. The grading operation can enable the dispersion work among substances with large density difference to become simple and feasible, and the difficult situations of complex traditional mineral separation process, high difficulty, high pollution, high energy consumption and high cost can be easily broken.

The quality of the minerals with the same granularity and the gangue is different due to density difference, the motion distance of the minerals with larger quality is farther with the same resistance, and therefore grading operation is carried out between the materials with different density differences. The mineral particles after differential fine grading by the invention have approximately equal sizes of the mineral particles and approximately equal sizes of the gangue particles in each grade, but the sizes of the mineral particles and the gangue particles are different, the particles with high density are smaller than those with low density, and the result is in direct proportion to the density ratio. When the density ratio of the mineral particles to the gangue particles is more than 1.3, high-efficiency screening can be realized by adopting mechanical screening. Therefore, the differential fine grading equipment can realize the separation of copper ores, tin ores, tungsten ores and lead-zinc ores including but not limited to ore species with large density difference, and the separation is simple, pollution-free and ultralow in cost, and the grade and the metal recovery rate of the separation are higher than those of the traditional separation process.

The screening efficiency is greatly influenced by the screening efficiency, the technology of the Tai-Gai Jianshan mine is upgraded once, the screening efficiency is improved from 35% to 75%, the system capacity is improved by 5%, and the annual economic benefit is increased by more than one thousand. The efficient screening and grading can timely separate out the qualified ground minerals, avoid the over-grinding phenomenon, reduce energy consumption, improve productivity and ensure metal recovery rate.

The technical scheme of the invention has the following beneficial technical effects: the material can be finely divided, and ground mineral particles are divided into a plurality of grades, so that subsequent ore dressing is facilitated. The dust pollution is little, and the water resource can not be wasted.

Drawings

Fig. 1 is a sectional view according to embodiment 1 of the present invention;

fig. 2 is a perspective partial sectional view according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of an emanator device according to embodiment 1 of the invention;

FIG. 4 is a cross-sectional view of an emanator device according to embodiment 1 of the invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is a schematic view of one of the material classifying sleeves according to embodiment 1 of the present invention;

fig. 7 is a plan view of a retainer plate according to embodiment 1 of the present invention.

Reference numerals:

1: a host sleeve; 2: a fan; 3: a rectifying disc; 4: a feed line; 5: an emanator device; 6: a material grading sleeve; 7: a motor; 8: a distance adjusting device; 9: a dust removal device; 51: a take-up pan 5; 52: a platen; 61: a concentric sleeve; 62: an annular cylindrical channel; 63: a material receiving plate; 64: grading the plane; 65: a discharge port; 66: a windproof net; 511: a chassis; 512: a circular truncated cone; 513: a circular wall; 521: a feeding port; 522: a tapered sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Example 1

As shown in fig. 1 and 2, a differentiated fine beneficiation host includes: a cylindrical main engine sleeve 1 with a diameter of 1200 mm; install the fan 2 parallel with the cross-section of host computer sleeve 1 in cylinder host computer sleeve 1 inside top, the diameter of the 1 shaft section of host computer sleeve that fan 2 is located is 1300mm, and the power of fan 2 is 1.5 kW.

Two rectifying disks 3 parallel to the fan 2 are further installed in the main machine sleeve 1, and the rectifying disks 3 are of a grid-shaped structure formed by a plurality of section thin plates perpendicular to the main machine sleeve 1. The thin plate is vertical to the section of the host sleeve 1, the grid is square, the side length of the grid is 10cm, and the width of the thin plate is 10 cm. A hole is reserved in the middle of the rectifying disc 3, and the feeding pipeline 4 can penetrate through the circular hole.

The feeding end of the feeding pipeline 4 is arranged below the fan 2 and is divided into two branches which penetrate out of two sides of the main machine sleeve 1; the middle part of the feeding pipeline 4 is arranged in the middle part of the main machine sleeve 1, the discharge end of the feeding pipeline 4 is connected with a diffuser device 5 and is butted with the upper part of a conical sleeve 522 arranged at the upper end of the diffuser mechanism, and a 1mm gap is reserved between the upper part and the conical sleeve 522.

The tapered sleeve 522 is a structure with a narrow top and a wide bottom, and the taper is 1.5. Emanator device 5 comprises a pressure plate 52 attached to a tapered sleeve 522. a circular hole is left in the middle of pressure plate 52 to attach to tapered sleeve 522. The material receiving disc 51 is installed on the lower portion of the pressure plate 52, the outer diameters of the material receiving disc 51 and the pressure plate 52 are the same, the contact positions of the material receiving disc 51 and the pressure plate 52 are connected through 6 bolts, a gap is reserved between the material receiving disc 51 and the pressure plate 52, a sleeve is sleeved on the bolts, and the gap between the material receiving disc 51 and the sleeve is 0.2mm after the sleeve is machined, as shown. The receiving tray 51 comprises a circular chassis 511, a circular truncated cone 512 is arranged in the middle of the circular chassis 511, a circular ring wall 513 concentric with the circular chassis 511 is further arranged, the outer ring of the circular ring wall 513 is perpendicular to the chassis 511, the outer diameter of the circular ring wall is the same as that of the circular chassis 511, the width of the circular ring wall is the same as that of the circular truncated cone 512, the section of the circular ring wall 513 is a right-angled trapezoid with the bottom edge parallel to the circular chassis 511, and the longer lower bottom edge of the circular ring wall is in contact; the shorter upper bottom edge forms a gap with the pressure plate 52 through bolts. A groove is formed between the conical surface of the circular truncated cone 512 and the conical surface of the circular ring wall 513, and after the pressure plate 52 is connected with the receiving plate 51, a cavity is formed between the groove and the lower surface of the pressure plate 52. When the material falls through the tapered sleeve 522, the material firstly falls along the tapered surface of the circular truncated cone 512 to contact with the circular chassis 511, and then the receiving disc 51 drives the pressure plate 52 to rotate together. The material starts to move away from the center of the circle under the action of centrifugal force, meets the conical surface of the annular wall 513 and then moves upwards along the conical surface, then moves to the gap between the material receiving disc 51 and the pressure plate 52, and finally is thrown out through the gap by extrusion. As shown in fig. 3 and 4, the diameter of the circular base plate 511 is 160mm, the thickness thereof is 6mm, the diameter of the bottom surface of the circular truncated cone 512 is 47mm, the height thereof is 14mm, and the taper thereof is 2; the section of the circular wall 513 is 14mm high in a trapezoid shape, the bottom side is 50mm long, and the top side is 15mm long. The diameter of the feeding port on the platen 52 is 43 mm. The lower part of the diffuser device 5 is connected with a motor 7, wherein the output end of the motor 7 is connected with a material receiving disc 51 through a rotating shaft, the rotating shaft is connected with a fixed sleeve through a bearing, the fixed sleeve is fixed with the main machine sleeve 1 through a support, the rotating shaft is prevented from deviating in rotation, and the diffuser device 5 can be ensured to rotate on a horizontal plane.

The lower part of the emanator device 5 is also provided with a material grading sleeve 6. The material classifying sleeve 6 includes 9 concentric sleeves 61. The height difference between the diffuser device 5 and the grading plane 64 of the material grading sleeve 6 is adjusted by the distance adjusting device 8 between the rotating shaft and the receiving disc 51; the material grading sleeve 6 is composed of a plurality of concentric sleeves 61 concentric with the receiving disc 51, wherein the diameter of the innermost layer of sleeve is 160mm the same as that of the receiving disc 51, the diameter difference of two adjacent concentric sleeves 61 from inside to outside of the material grading sleeve 6 is gradually increased, and the diameters of the specific rest 8 layers of concentric sleeves 1 are respectively: 184. 214, 254, 306, 378, 458, 538, 618 mm. Wherein concentric sleeves of 458mm, 538mm, 618mm diameter are lifted upwards by 5mm, 10mm and 20mm, respectively. The upper edges of the 6 concentric sleeves 61 forming the material grading sleeve 6 are positioned on the same grading plane 64, and the grading plane 64 is parallel to the material receiving disc 51.

As shown in fig. 1, 6 and 7, two discharge holes 65 are arranged between each two layers of the material grading sleeves 6, and are respectively arranged at two sides of the cylinder. The outlets of the different layers may be staggered. The discharge hole 65 between the innermost sleeve and the adjacent sleeve of the material grading sleeve 6 is connected with a dust removing device 9. The material receiving plate 63 is also provided with a wind screen.

Grading test using the differentiated Fine Ore dressing host computer provided in example 1

Magnetite and hematite

Hematite 4.8-5.3 g/cm³Density of gangue: 2.65g/cm³And the density ratio is 1.8-2, after the differential fine beneficiation host machine of the embodiment 1 is used for grading, the size relation of mineral particles and gangue particles in each grade is in a direct proportion relation, and the diameter of iron ore particles is about half of the diameter of the gangue particles. The size forms a larger difference, the state is favorable for carrying out high-efficiency mineral separation by adopting a simple mode, high-grade concentrate is easier to separate, and higher metal recovery rate is obtained. The hematite reaches 67 percent of concentrate grade, and the metal recovery rate is 85 percent.

The grading result of magnetite is the same as that of hematite, and after the differential fine beneficiation host machine of embodiment 1 is used for grading, the diameter ratio of mineral particles to gangue particles in each grade is generally 1.5-2.0, and the grading effect of about 68% of concentrate grade and 90% of metal recovery rate can be obtained by adopting a screening mode for grading.

Red brown iron ore

In 2018, the ore dressing experiment is carried out on a certain hematite and limonite in southeast of Yunnan, the ore belongs to a difficultly selected ore species, the mineral structure is complex, and the ore belongs to fine grains and micro-fine grain embedded cloth and is high in silicon and phosphorus. The research institute of long sand mining and metallurgy adopts stage ore grinding, strong magnetic separation combined with direct flotation dephosphorization and reverse flotation to obtain a fine process, the achievement of 58% of concentrate grade and 57.8% of metal recovery rate is achieved, however, after the construction of a plant, the production of the plant is stopped due to poor process adaptability, and hundreds of millions of investment falls into the air. After the differential fine beneficiation host installed in the embodiment 1 is used for classification, differential fine classification treatment is carried out, and a narrow-level screening mode is adopted, so that the concentrate grade of 60.5% and the metal recovery rate of 80.5% can be obtained. The fine grading narrow-level selection is proved to have good economical efficiency and adaptability.

Chalcopyrite ore

The density of the chalcopyrite is 4.1-4.3 g/cm³The gangue minerals mainly comprise limestone, quartz and feldspar, the density is 2.6-2.8, the narrow-level internal density ratio is 1.46-1.6, the gangue can be easily discarded by adopting the differential fine beneficiation host of the embodiment 1, the grade of the chalcopyrite concentrate reaches 25%, the metal recovery rate reaches 80%, and the recovery rate is improved by 20% compared with the recovery rate which is below 60% on average in China.

Tin ore

The tin ore has higher density, the tin ore is usually selected by adopting a gravity separation mode at home, the recovery rate is less than 57%, the metal recovery rate which is less than 67% is only adopted by adopting a flotation mode in recent years, the main loss way of the mineral is that the fine particle group with the particle size of less than 0.04 is difficult to effectively recover, the differentiated fine ore dressing host installed in the embodiment 1 is used for effectively selecting particles with the particle size of more than 700 meshes in a grading mode, the ratio of the mineral particles to gangue particles in a narrow grade is more than 2, and the good effect that the tin ore concentrate grade is 61% and the metal recovery rate is higher than 86% can be obtained by adopting the.

Scheelite ore

The separation of scheelite is still a world problem at present, the conventional separation cost is extremely high, the recovery rate is low, and the density of the scheelite is 6.1g/cm³The differentiated fine beneficiation host installed in the embodiment 1 is used for screening after grading, and a narrow-grade screening mode is adopted to obtain the grade of 65% and the metal recovery rate of 87%.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A differentiated fine beneficiation main machine is characterized by comprising: a cylindrical main body sleeve (1); a fan (2) parallel to the section of the main machine sleeve (1) is arranged above the inner part of the main machine sleeve (1); a plurality of rectifying discs (3) parallel to the fan (2) are further arranged in the main machine sleeve (1); a feeding pipeline (4) penetrates through the middle part of the rectifying disc (3), and the feeding end of the feeding pipeline (4) is arranged below the fan (2) and penetrates out of the side face of the main machine sleeve (1); a diffuser device (5) is arranged below the feeding pipeline (4), and the lower part of the diffuser device (5) is connected with a motor (7); a material grading sleeve (6) is further arranged at the lower part of the diffuser device (5);

the disperser device (5) consists of a receiving disc (51) and a pressing disc (52) arranged on the receiving disc (51), a cavity is arranged between the receiving disc (51) and the pressing disc (52), and a gap is arranged between the contact surfaces of the receiving disc (51) and the pressing disc (52); the material grading sleeve (6) is composed of a plurality of concentric sleeves (61) which are concentric with the receiving disc (51).

2. The host machine for differentiated fine beneficiation according to claim 1, wherein the take-up tray (51) comprises a circular chassis (511), a circular truncated cone (512) concentric with the circular chassis (511) and a circular ring wall (513); the inner ring surface of the circular ring wall (513) is a conical surface; a feed inlet (521) is formed in the center of the pressure plate (52), a tapered sleeve (522) with a narrow upper part and a wide lower part is mounted on the feed inlet (521), and the feed pipeline (4) extends into the tapered sleeve (522).

3. The main differential fine beneficiation machine according to claim 2, wherein the material grading sleeve (6) is formed by two concentric sleeves (61) adjacent from inside to outside, and the diameter difference of the two concentric sleeves is gradually increased.

4. The differentiated fine beneficiation host according to claim 3, wherein a cylindrical ring channel (62) is formed between every two layers of the concentric sleeves (61) of the material grading sleeve (6), a material receiving plate (63) is arranged at the bottom of each cylindrical ring channel (62), the material receiving plate (63) is installed on one concentric sleeve (61) inside the cylindrical ring channel (62), and an opening is formed between the lower edge of the outer sleeve and the material receiving plate (63) to allow particles to fall from the cylindrical ring channel (62) to the material receiving plate (63); the material receiving plate (63) is composed of two ridge-shaped inclined surfaces, the edges of the inclined surfaces are provided with vertical flanges, and the lowest end of the inclined surfaces is provided with a material outlet (65); the material receiving plate (63) is further provided with a windproof net (66), the windproof net (66) is parallel to the material receiving plate (63), and a gap is formed between the windproof net and the material receiving plate.

5. The main differential fine beneficiation machine according to claim 4, wherein the gap between the receiving disc (51) and the pressing disc (52) is 0.1-2.0 mm.

6. The main differential fine beneficiation machine according to claim 5, wherein the rectifying disc (3) is a grid structure formed by a plurality of thin plates perpendicular to the section of the main machine sleeve (1).

7. Host differential beneficiation according to claim 6, wherein the upper edges of the concentric sleeves (61) making up the material grading sleeve (6) are located on the same grading plane (64), the grading plane (64) being parallel to the receiving tray (51).

8. The main differential fine beneficiation machine according to claim 7, wherein a distance adjusting device (8) is arranged between the material receiving disc (51) and the material grading sleeve (6), and the distance between the grading plane (64) and the material receiving disc (51) is 6-12 cm.

9. Differentiated fine beneficiation host according to claim 8, wherein the ring cylindrical channel (62) of the innermost of the material grading sleeve (6) is connected with a dust removal device (9).

10. The host differential fine beneficiation machine according to claim 9, wherein the material grading sleeve (6) comprises 3-21 concentric sleeves (61).