CN110090795B

CN110090795B - Material grading sleeve of differential fine mineral processing host

Info

Publication number: CN110090795B
Application number: CN201910452263.9A
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: 2021-04-09
Anticipated expiration: 2039-05-28
Also published as: CN110090795A

Abstract

The invention discloses a material grading sleeve of a differentiated fine mineral processing host, which relates to the field of mineral grading and is used for classifying mineral particles thrown out by a diffuser device arranged above the device into different grades, and comprises the following components: the concentric sleeves are fixedly connected with each other through a thin sheet perpendicular to the sections of the concentric sleeves; an annular cylindrical channel is formed between every two layers of concentric sleeves, a discharge port opening is formed in the bottom of each annular cylindrical channel, and a discharge port of the innermost annular cylindrical channel is connected with the dust removal device in a sealing mode.

Description

Material grading sleeve of differential fine mineral processing host

Technical Field

The invention relates to the field of mineral grading, in particular to a material grading sleeve of a differentiated fine mineral processing host machine.

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 current classification technology can be divided into three categories of gravity hydraulic classification, centrifugal force hydraulic classification and high-frequency fine screening. The hydraulic classification is a classification method that the particles are subjected to the action of gravity or centrifugal force in water to achieve the distribution according to the final sedimentation speed, and mainly comprises a spiral classifier, a hydrocyclone, an air classifier 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. A method of classifying by wind power and centrifugal force has been proposed, in which mineral powder is poured onto a disk rotating at a high speed to throw out mineral particles, and the mineral particles are blown into different discharge ports by wind power to perform classification. However, the method has poor mineral particle grading effect and large dust pollution, and cannot be applied to industry.

Disclosure of Invention

The invention aims to provide a material grading sleeve of a differentiated fine mineral processing main machine, which is characterized in that a plurality of concentric sleeves 1 are arranged to form a plurality of annular cylindrical channels 2 to divide mineral particles thrown out by a diverger device 5 into different grades, and mineral concentrate and waste in each grade are easily separated through simple volume. The grading effect of the differentiated fine beneficiation host is improved, industrial application is achieved, grading cost is reduced, and beneficiation efficiency is improved.

The technical scheme of the invention is as follows:

the utility model provides a material grading sleeve of meticulous ore dressing host computer of differentiation for the mineral particle who throws out with diffuser device (5) that this device top set up divide into different grades, include:

the device comprises a plurality of layers of concentric sleeves 1, wherein each layer of concentric sleeves 1 is fixedly connected through a thin sheet vertical to the section of the concentric sleeve 1; an annular cylindrical channel 2 is formed between every two layers of the concentric sleeves 1, a discharge port opening 3 is arranged at the bottom of each annular cylindrical channel 2, and the discharge port opening 3 of the innermost annular cylindrical channel 2 is hermetically connected with a dust removal device 4;

the diameter of the innermost sleeve 11 of the concentric sleeves 1 is the same as the diameter of the receiving disc 51 of the emanator device 5, the receiving disc 51 being disc-shaped and being a rotating part of the emanator device 5 for emanation of mineral particles falling therein;

the outer sides of all middle layer sleeves 12 in the concentric sleeves 1 are provided with material receiving plates 6 extending outwards, and outlets formed at the contact positions of the material receiving plates 6 and the outer layer of concentric sleeves are the discharge channel openings 3;

connect flitch 6 to be ridge-shaped, constitute by two swash plates 61, the swash plate 61 edge is provided with vertically flange 62, the angle is 90 ~ 120 between two swash plates 61, the swash plate 61 lowest is provided with discharge gate 31.

Specifically, in order to solve the above problems, a first aspect of the present invention provides a material grading sleeve of a differentiated fine mineral processing main machine, configured to classify mineral particles thrown by an upper diffuser device 5 into different grades, including: the concentric sleeves 1 are fixedly connected with each other through a thin sheet perpendicular to the cross section of the concentric sleeve 1; an annular cylindrical channel 2 is formed between every two layers of concentric sleeves 1, a discharge port opening 3 is arranged at the bottom of each annular cylindrical channel 2, and the discharge port opening 3 of the innermost annular cylindrical channel 2 is hermetically connected with a dust removal device 4. After the mineral particles are thrown out by the diverger device 5, the mineral particles do centrifugal motion in the horizontal direction and horizontal throwing motion in the vertical direction in the air and are subjected to wind power generated by a differential fine beneficiation main machine fan. During the air movement, the longer the mineral particles with larger mass move, the farther the horizontal displacement is, and when falling into the material grading sleeve, the mineral particles fall into the outer annular cylindrical channel 2, so that the mineral particles can be classified into different grades according to the mass, and the density difference exists between the mineral particles and waste materials, and the mineral particles entering the same annular cylindrical channel 2 can be easily screened out through different volumes. The lamellae for fixing the concentric sleeve 1 perpendicular to the cross-section of the concentric sleeve 1 prevent mineral particles from being blocked when they fall down. The mineral particles falling into the innermost ring-cylindrical channel 2 are the lightest in weight, most of them are waste materials, which may cause dust pollution, most of the dust can be removed after the dust removing device 4 is connected, and the mineral particles of other ring-cylindrical channels 2 do not have too fine dust.

A further technical solution is that the diameter of the innermost sleeve 11 of the concentric sleeves 1 is equal to the diameter of the receiving disc 51 of the emanator device 5, and the receiving disc 51 is disc-shaped and is a rotating part on the emanator device 5 for emitting mineral particles falling therein. This prevents mineral particles from falling into the innermost sleeve 11, which would otherwise be the case for mineral particles of 600 mesh and finer, which would otherwise easily fall into the innermost sleeve 11, and in the case of the present invention can fall directly into the annular cylindrical passage 2 formed by the innermost sleeve 11 and the outer concentric sleeve 1.

The further technical scheme is that the outer sides of all middle layer sleeves 12 in the concentric sleeves 1 are provided with outwards extending material receiving plates 6, and the outlet at the contact position of the material receiving plates 6 and the outer layer of concentric sleeves is the discharge port opening 3. After mineral particles enter the material grading sleeve and are divided into a plurality of grades, the mineral particles continue to move along the annular cylindrical channels 2, each annular cylindrical channel 2 is a cavity between the inner concentric sleeve 1 and the outer concentric sleeve 1, the mineral particles move to the material receiving plate 6 arranged on the inner concentric sleeve 1, and then the mineral particles leave the material grading sleeve from the material grading sleeve at the discharge port opening 3 formed at the contact part of the material receiving plate 6 and the outer concentric sleeve 1, so that the grading of the mineral particles is completed. A collecting device can be arranged below the discharge opening 3 for collection. One or more material receiving plates 6 can be arranged on each concentric sleeve 1, and a plurality of material outlets 31 can be arranged at the same time to discharge materials simultaneously so as to improve the treatment efficiency. The number of the material receiving plate 6 and the number of the discharge channel openings 3 can be 1, 2, 3, 4, 5 and 6, including but not limited to the above examples, and preferably 2-3.

A further technical scheme is that the material receiving plate 6 is in a roof ridge shape and is composed of two inclined plates 61, the edges of the inclined plates 61 are provided with vertical flanges 62, the angle between the two inclined plates 61 is 90-120 degrees, and the lowest part of the inclined plates 61 is provided with a material outlet 31. Wherein connect the ridge limit of flitch 6 to be the juncture of two swash plates 61, the ridge limit passes through the centre of a circle of concentric sleeve 1 cross-section, can be divided into two parts by two swash plates 61 when mineral particles fall like this to follow the ejection of compact of two discharge gates 31. The edge of the sloping plate 61 is provided with a vertical rib 62 to prevent mineral particles from falling off when moving on the receiving plate 6. The angle between the two inclined plates 61 may be 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120 °, including but not limited to the above examples, and the angle between the receiver plates 6 in this range enables the mineral particles to fall down the receiver plates 6 when they fall on the receiver plates 6 without bouncing off the receiver plates 6 due to too much reaction force.

The further technical scheme is that the diameter difference of two adjacent concentric sleeves 1 from inside to outside of the concentric sleeves 1 is gradually increased. The diameter difference of two adjacent concentric sleeves 1 from inside to outside of the concentric sleeve 1 is gradually increased, and the obtained result is that the width of the annular cylindrical channel 2 is gradually increased. In use, mineral particles thrown through the emanator device 5, after being subjected to a vertically downward wind, are progressively graded according to mass, with smaller masses being closer to the innermost sleeve 11 with smaller horizontal displacements and closer relative positions as the lower mass particles fall to the upper edge of the concentric sleeve 1, so that the lower mass particles fall to the upper edge of the concentric sleeve 1 and are distributed in a circle of smaller width; the further the relative position between the same grade of mineral particles as the mass of the mineral particles increases, and thus falls to the upper edge of the concentric sleeve 1, distributed in a wider circle away from the innermost sleeve 11. Therefore, the diameter difference of two adjacent concentric sleeves 1 from inside to outside of the concentric sleeves 1 needs to be gradually increased so as to grade the mineral particles of each grade, the condition that the same grade mineral particles with larger quality are divided into multiple grades can be avoided, the cost can be saved, and the working efficiency is improved.

A further technical scheme is that the material grading sleeve comprises 3-21 concentric sleeves 1. Wherein the ring column form passageway 2 that constitutes between two adjacent concentric sleeves 1 can supply the mineral granule to pass through, and 3 ~ 21 concentric sleeves 1 can form 2 ~ 20 ring column form passageways 2, divide into 2 ~ 20 grades to the mineral granule, are greater than present generally to the hierarchical quantity of mineral granule far away. The material grading sleeve can include 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21 concentric sleeves 1, preferably 5 to 16, including but not limited to the above examples, which can be adjusted according to the actual ore species and the grading requirement. The finer the grading of mineral particles, the more efficient the separation of mineral and waste materials. As in one embodiment, the mineral particles below 200 mesh are classified into one grade per 50 mesh interval, where one grade per 50 mesh interval refers to the mesh of useful mineral particles in each grade and not the mesh of gangue or waste. The method is divided into 9 levels, namely: 200-250-300-350-400-450-500-550-600 meshes below. The gangue or waste material in the same grade has a larger volume than the ore, so that the same momentum as the ore is obtained and is classified into the same grade, and therefore the ore can be easily screened out of the grade by the difference in volume after classification.

A wind-proof net 63 is arranged on the material receiving plate 6; the wind screen 63 is parallel to the sloping plate 61, and a gap is provided therebetween. The mesh number of the windproof net 63 is 14-50 meshes, and the windproof net 63 of the specification can enable mineral particles to fall into a gap between the lower portion of the windproof net 63 and the inclined plate 61, so that the mineral particles are effectively prevented from being blown up by wind. When in use, mineral particles fall onto the windproof net 63 on the material receiving plate 6 through the annular cylindrical channel 2 of the grading sleeve, pass through the windproof net 63 and then fall onto the material receiving plate 6, and slide to the discharge hole 31 of the inclined plate 61 along the inclined plate 61 after bouncing for a plurality of times in a small distance of a gap between the inclined plate 61 and the windproof net 63. While the mineral particles pass through the classifying sleeve, the air flow generated by the fan also passes through one of the annular cylindrical passages 2 of the classifying sleeve, then passes through the windproof net 63 along with the mineral particles, and then is rebounded by the material receiving plate 6 to blow out of the windproof net 63. After the windproof net 63 is additionally arranged in actual production, the probability that mineral particles are blown by wind generated by a fan and are ejected out of the material receiving plate 6 can be effectively reduced. The material grading sleeve not only has a grading function but also is an airflow channel, and a ring-shaped cylindrical channel 2 is formed between the concentric sleeves 1 and is matched with a rectifying disc arranged on the grading host machine to keep airflow stable and smooth.

The further technical proposal is that the upper edges of a plurality of concentric sleeves 1 are positioned on the same grading plane 7, and the grading plane 7 is parallel to the receiving tray 51. The parallelism of the grading plane 7 with the take-up pan 51 ensures that the vertical distance that the mineral particles travel from the emanator device 5 to each of the annular cylindrical channels 2 is the same.

The further technical scheme is that the grading plane 7 is lower than the receiving disc 51, and the distance between the grading plane and the receiving disc 51 is 6-12 cm. The space between the grading plane 7 and the receiving disc 51 limits the time for the mineral particles to move in the air and disperse in different grades in the air, when the space between the grading plane 7 and the receiving disc 51 is 6-12 cm, the mineral particles are fully dispersed according to the mass when reaching the grading plane 7, and a better grading effect can be achieved after entering the material grading sleeve. If the distance between the grading plane 7 and the receiving tray 51 is too small, the mineral particles of each grade are not fully dispersed; if the separation distance between the grading plane 7 and the receiving tray 51 is too large, the volume of the device is too large to be economical. The distance between the grading plane 7 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. The distance between the grading plane 7 and the receiving tray 51 can be adjusted according to different minerals.

The further technical scheme is that the section of the concentric sleeve 1 is parallel to the material receiving disc 51, when the diameter difference of two adjacent concentric sleeves 1 is greater than or equal to 80mm, the diameter difference of the concentric sleeve 1 on the outer layer is not increased any more than that of the concentric sleeve 1 on the inner layer, the concentric sleeve 1 is fixed to be 80mm, and the position of the upper edge of the concentric sleeve 1 is gradually increased. When the diameter difference of two adjacent concentric sleeves 1 is larger than or equal to 80mm, the host volume is increased together by continuously increasing the diameter difference of the two adjacent concentric sleeves 1. The diameter difference of the concentric sleeve 1 on the outer layer compared with the concentric sleeve 1 on the inner layer is fixed to be 80mm, and then the position of the upper edge of the concentric sleeves is gradually raised. Therefore, the mineral particles with the same grade and farther horizontal displacement can collide with the wall of the concentric cylinder, and then enter the annular cylindrical channel 2 of the grade in advance to finish grading, so that the diameter of the concentric cylinder can be reduced, and the equipment cost is reduced. Wherein the concentric sleeve 1 may not be raised when the diameter difference of two adjacent concentric sleeves 1 is less than 80mm, i.e. when the width of the annular cylindrical passage 2 is less than 40mm, and the concentric sleeve 1 needs to be raised in height to reduce the width of the annular cylindrical passage 2 when the width of the annular cylindrical passage 2 is greater than 40 mm. The uppermost position of the upper edge of concentric sleeve 1 does not exceed the take-up plate 51 of emanator device 5. The elevated size of the concentric sleeve 1 is calculated on the principle that the mineral particles are not repelled back into the upper annular cylindrical passage 2. Therefore, the overall dimension of the equipment can be reduced without influencing the grading effect, and the manufacturing cost is also saved. The mineral particles that bounce back by the wall of the concentric sleeve 1 are still subjected to the downward wind force generated by the fan and also to the rear entry mineral particle collision. The force of the downward wind also changes the direction of movement of the mineral particles. Because the mass of the mineral particles varies in size, the smaller the mass, the faster the movement at the same initial speed, and therefore the smaller the height the more inner concentric sleeve 1 needs to be lifted. After the size of the material grading sleeve is fixed, if the graded mineral is changed, the mineral particles can be well graded by adjusting the wind power of the fan, the rotating speed of the receiving disc 51 of the diffuser device 5 and the distance between the receiving disc 51 and the grading plane 7.

The principle of the invention is explained as follows: the material grading sleeve is arranged on a differentiated fine beneficiation host, and the differentiated fine beneficiation host comprises: 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; an emanator device 5 is arranged below the feeding pipeline, the emanator device 5 comprises a material receiving disc 51 and a pressure plate arranged on the material receiving disc 51, a cavity is arranged between the material receiving disc 51 and the pressure plate, and a gap is arranged between the contact surfaces of the material receiving disc 51 and the pressure plate; the lower part of the diffuser device 5 is provided with a material grading sleeve in the invention; the material classifying sleeve is composed of a plurality of concentric sleeves 1 which are concentric with the receiving tray 51. In one embodiment, a windproof pipe with the same diameter as that of the pressure plate can be arranged at the position, which penetrates through the feeding pipeline, of the center of the rectifying plate, so that the wind generated by the fan is prevented from directly blowing the pressure plate to cause the vertically downward wind to be disordered.

When the device is used, mineral powder ground by the ball mill enters the feeding pipeline, then downwards along the vertical main feeding pipeline, leaves the feeding pipeline, enters the conical sleeve on the pressure plate of the diffuser device 5, and enters the cavity between the pressure plate and the receiving disc 51 through the feeding port of the pressure plate after passing through the conical sleeve. The motor of ware device 5 installation through its below rotates, the centrifugal force of rotatory production forces the pressure disk and the mineral particles in the take-up pan 51 cavity to cavity motion all around, mineral particles upwards extrudees along the inclined plane of ring inner ring, move to the juncture of pressure disk and take-up pan 51, and throw out from ware device 5 through the clearance of juncture, throw out direction one-tenth horizontal direction 360 degrees, no matter granule size can both guarantee that the mineral particles are gone out with the dispersion of same initial velocity, ware device 5 is diverged the clearance size and can be adjusted in 0.1 ~ 1.5 mm's within range, it decides the clearance aperture to be handled the mineral particles size. The mineral particles dispersed out of the diffuser device 5 are acted by gravity, air resistance and downward air flow generated by the fan at the same time, the motion distances of the minerals with different masses are completely different after the resultant force action, and the distance with large mass is far away from the distance with small particles, so that the whole grading process is realized. In addition, the minerals and the gangue with the same mass and the same size are different in volume due to density difference, and the mineral particles classified by using the differential fine beneficiation main machine are smaller than 200 meshes, so that the air resistance is considered to be the same, the minerals and the gangue with the same mass and the different sizes are classified into the same grade, and can be easily separated through the volume difference, so that the classification operation is also completed among the substances with different density differences. Therefore, the dispersion work among substances with large density difference becomes 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 movement of the mineral particles after leaving the emanator device 5 is centrifugal in the horizontal plane and flat projectile in the vertical plane. And the wind power generated by the fan forms vertical downward wind power after passing through the rectifying disc. 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 is reduced after the movement time 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. The waste material with the minimum mass falls into the innermost sleeve of the material grading sleeve and then enters the dust removing equipment through the discharge opening 3. Other mineral particles enter the different ring-cylindrical channels 2 of the material classifying sleeve, are classified into several classes and are collected from different discharge openings 31. 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. Within each class, the mineral particles are approximately equal in size and the gangue particles are approximately equal in size, but the mineral particles are not the same size as the gangue particles, and the denser particles are smaller than the less dense particles, resulting in a direct ratio to density. 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 make copper ores, tin ores, tungsten ores and lead-zinc ores including but not limited to ore species with large density difference, realize simple, pollution-free and ultralow-cost sorting, and the grade and the metal recovery rate of the screening are higher than those of the traditional beneficiation process.

The screening efficiency is greatly influenced, for example, the screening efficiency is improved from 35% to 75% by one-time technical upgrading of the Tai-Gai Jian mountain mine, 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. Therefore, the invention also has good economic benefit.

The technical scheme of the invention has the following beneficial technical effects: the mineral particles thrown out by the diffuser device 5 can be provided with a plurality of grading channels, and fine material distribution is realized. The ground mineral particles are divided into a plurality of grades, so that subsequent mineral separation is facilitated. The dust pollution is little, and the water resource can not be wasted. Can produce good economic benefit.

Drawings

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

fig. 2 is a schematic view of an intermediate layer sleeve in embodiment 1 of the present invention;

fig. 3 is a plan view of an intermediate layer sleeve in embodiment 1 of the invention;

fig. 4 is a schematic installation diagram of embodiment 1 of the invention installed on a differentiated fine beneficiation main machine;

fig. 5 is a sectional view of embodiment 1 of the present invention installed on a differentiated fine beneficiation main machine;

fig. 6 is an enlarged view at a in fig. 5.

Reference numerals: 1: a concentric sleeve; 2: an annular cylindrical channel; 3: a discharge port; 4: a dust removal device; 5: an emanator device; 6: a material receiving plate; 7: grading the plane; 11: an innermost sleeve; 12: an intermediate layer sleeve; 31: a discharge port; 51: a take-up pan; 61: a sloping plate; 62: blocking edges; 63: a windproof net.

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 the figure, a material grading sleeve of differentiation fine mineral processing host computer includes: the concentric sleeves 1 are 9, and each layer of concentric sleeves 1 are fixedly connected through a thin sheet perpendicular to the cross section of each concentric sleeve 1; an annular cylindrical channel 2 is formed between every two layers of concentric sleeves 1, a material receiving plate 6 is arranged on the outer side of all the intermediate layer sleeves 12, and an outlet formed at the contact position of the material receiving plate 6 and the outer layer of concentric sleeves 1 is a discharge port 31. Wherein the discharge port 31 of the innermost annular cylindrical channel 2 is hermetically connected with the dust removing device 4. Connect flitch 6 to constitute for two swash plates 61 of ridge-shaped, and the swash plate 61 edge is provided with vertically flange 62, and the angle is 120 between the swash plate 61, and the minimum of swash plate 61 is opened there is discharge gate 31. The material receiving plate 6 is provided with a windproof net 63; the windproof net 63 is parallel to the sloping plate 61, and a 2mm gap is provided therebetween. The diameter of the innermost sleeve 11 is 160mm, and the diameters of the remaining 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 inner 6 concentric sleeves 1 which form the material grading sleeve are positioned on the same grading plane 7, and the grading plane 7 is parallel to the receiving disc 51 of the emanator device 5 and has a distance of 10 cm.

Other structures of the differentiation fine ore dressing host computer that has installed this embodiment do:

as shown in the figure, the material grading sleeve is provided with a diffuser device 5, which comprises a material receiving disc 51 and a pressure plate, wherein the material receiving disc 51 consists of a circular chassis, a circular truncated cone and a circular ring wall. The diameter of the circular chassis is 160mm, the thickness of the circular chassis is 6mm, the diameter of the bottom surface of the circular truncated cone is 47mm, the height of the circular truncated cone is 14mm, and the taper of the circular truncated cone is 2; the trapezoid height of the section of the circular wall is 14mm, the side length of the bottom is 50mm, and the length of the top side is 15 mm. The pan feeding mouth diameter on the pressure disk is 43mm, sets up at the pressure disk center, installs the toper sleeve of width under the narrow on the pan feeding mouth, and the tapering of toper sleeve is 2. The feeding pipeline is sleeved in the conical sleeve at the upper part of the conical sleeve, and a gap is reserved between the feeding pipeline and the conical sleeve. A 0.1mm gap is arranged between the contact surfaces of the receiving disc 51 and the pressing disc; the pressure plate is connected with the material receiving plate 51 through 6 bolts, sleeves are mounted on the bolts, and the sleeves are processed to enable the gap between the contact surfaces of the pressure plate to be 0.1 mm.

The lower part of the diffuser device 5 is connected with a motor through a rotating shaft, the rotating shaft is connected with a circular truncated cone through a bolt, the distance between the material receiving disc 51 and the grading plane 7 of the material grading sleeve can be adjusted through adjusting the bolt, and the distance between the material receiving disc 51 and the grading plane 7 of the material grading sleeve is adjusted to be 10 cm. The rotation axis passes through the bearing and is connected with fixed sleeve, and fixed sleeve passes through the support with the host computer sleeve and fixes, prevents that the rotation axis from taking place the skew in rotatory, can guarantee to disperse ware device 5 rotatory on the horizontal plane.

The diameter of a main machine sleeve of the differential fine ore dressing main machine is 1200 mm; the fan parallel to the cross section of the main engine sleeve is installed above the inner portion of the cylindrical main engine sleeve, the diameter of the main engine sleeve shaft section where the fan is located is 1300mm, and the power of the fan is 1.5 kW. Two rectifying disks parallel to the fan are further installed in the main machine sleeve, and each rectifying disk is of a grid structure formed by a plurality of section thin plates perpendicular to the main machine sleeve. The thin plate is vertical to the section of the host sleeve, 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, and the feeding pipeline can penetrate through the hole in the middle of the rectifying disc. The feeding end of the feeding pipeline is arranged below the fan and is divided into two branches which penetrate out of two sides of the main machine sleeve; the middle part of the feeding pipeline is arranged in the middle of the main machine sleeve, the discharge end of the feeding pipeline is connected with the diffuser device 5 and is in butt joint with the upper part of a conical sleeve arranged at the upper end of the diffuser device 5, and a 1mm gap is reserved between the upper part and the conical sleeve.

Grading test using a differentiated Fine Ore dressing host machine equipped with example 1

Magnetite and hematite

Hematite 4.8-5.3 g/cm 3, gangue density: 2.65g/cm 3, a density ratio of 1.8-2, and after the differential fine beneficiation host machine of the embodiment 1 is used for grading, the relationship between the sizes of mineral particles and gangue particles in each grade is in a direct proportion relationship, 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 chalcopyrite density is 4.1-4.3 g/cm < 3 >, the gangue minerals mainly comprise limestone, quartz and feldspar, after the density is 2.6-2.8, the narrow-grade 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 chalcopyrite concentrate grade 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, the density of the scheelite is 6.1g/cm < 3 >, the scheelite is classified and then screened by using a differential fine beneficiation host installed in the embodiment 1, and the grade can be obtained by adopting a narrow-grade screening mode, and the metal recovery rate is 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. The utility model provides a material grading sleeve of meticulous ore dressing host computer of differentiation for the mineral particle who throws out with diffuser device (5) that this device top set up divide into different grades, its characterized in that includes: the device comprises a plurality of layers of concentric sleeves (1), wherein each layer of concentric sleeve (1) is fixedly connected with each other through a thin sheet vertical to the section of the concentric sleeve (1); an annular cylindrical channel (2) is formed between every two layers of concentric sleeves (1), a discharge channel opening (3) is arranged at the bottom of each annular cylindrical channel (2), and the discharge channel opening (3) of the innermost annular cylindrical channel (2) is hermetically connected with a dust removal device (4); the diameter of the innermost sleeve (11) in the concentric sleeves (1) is the same as that of a receiving disc (51) in the emanator device (5), the receiving disc (51) is disc-shaped and is a rotating part on the emanator device (5) and is used for emitting mineral particles falling into the receiving disc; the outer sides of all middle layer sleeves (12) in the concentric sleeves (1) are provided with outwards extending material receiving plates (6), and outlets formed at the contact positions of the material receiving plates (6) and the outer layer of concentric sleeves are the discharge passage openings (3); connect flitch (6) to be ridge-shaped, constitute by two swash plates (61), swash plate (61) edge is provided with vertically flange (62), the angle is 90 ~ 120 between two swash plates (61), swash plate (61) is provided with discharge gate (31) in the lower.

2. The material grading sleeve of a differentiated fine beneficiation host according to claim 1, wherein the diameter difference of two adjacent concentric sleeves (1) of the concentric sleeves (1) from inside to outside is gradually increased.

3. The material grading sleeve of a differentiated fine beneficiation main machine according to claim 2, characterized in that the material grading sleeve comprises 3-21 concentric sleeves (1).

4. The material grading sleeve of the differentiated fine beneficiation main machine according to claim 1, wherein the material receiving plate (6) is provided with a windproof net (63); the windproof net (63) is parallel to the inclined plate (61), and a gap is formed between the windproof net and the inclined plate.

5. The material grading sleeve of a differentiated fine beneficiation mainframe according to claim 1, wherein the upper edges of several concentric sleeves (1) are located on the same grading plane (7), and the grading plane (7) is parallel to the receiving tray (51).

6. The material grading sleeve of the differentiated fine beneficiation host according to claim 5, wherein the grading plane (7) is lower than the receiving tray (51) with a distance of 6-12 cm.

7. The material grading sleeve of the differentiated fine beneficiation host according to claim 1, wherein the section of the concentric sleeve (1) is parallel to the receiving tray (51), when the diameter difference between two adjacent concentric sleeves (1) is greater than or equal to 80mm, the diameter difference between the concentric sleeve (1) on the outer layer and the concentric sleeve (1) on the inner layer is not increased any more and is fixed to 80mm, and the position of the upper edge of the concentric sleeve (1) is gradually raised.